CA2232420A1 - Immunoglobulin preparation and preparation process thereof - Google Patents
Immunoglobulin preparation and preparation process thereof Download PDFInfo
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- CA2232420A1 CA2232420A1 CA002232420A CA2232420A CA2232420A1 CA 2232420 A1 CA2232420 A1 CA 2232420A1 CA 002232420 A CA002232420 A CA 002232420A CA 2232420 A CA2232420 A CA 2232420A CA 2232420 A1 CA2232420 A1 CA 2232420A1
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- immunoglobulin
- preparation
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- containing solution
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/06—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies from serum
- C07K16/065—Purification, fragmentation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/16—Extraction; Separation; Purification by chromatography
- C07K1/18—Ion-exchange chromatography
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/34—Extraction; Separation; Purification by filtration, ultrafiltration or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/36—Extraction; Separation; Purification by a combination of two or more processes of different types
Abstract
An immunoglobulin preparation comprising an immunoglobulin, wherein the preparation contains, as a contaminant, serum albumin in an amount not greater than 10 µg per 50 mg of immunoglobulin; and/or wherein said preparation is free of fine particles which can serve as a nucleus of insoluble foreign matter, and processes for preparing the immunoglobulin preparation are described.
Description
IMMUNOGLOBULIN PREPARATION AND
PREPARATION PROCESS THEREOF
BACRGROUND OF THE INVENTION
1. Field of the Invention This invention relates to an immunoglobulin preparation, more specifically, an immunoglobulin preparation having excellent storage stability.
PREPARATION PROCESS THEREOF
BACRGROUND OF THE INVENTION
1. Field of the Invention This invention relates to an immunoglobulin preparation, more specifically, an immunoglobulin preparation having excellent storage stability.
2. Description of the Related Art Among ~-globulins which are plasma protein components, an immunoglobulin preparation comprising IgG
has been used for preventing and treating various infectious diseases. The immllnoglobulin is unstable in the form of a solution. It is known that as a result of the aggregation of immunoglobulin, in other words, as a result of the denaturation of the immllnoglobulin during the fractionating operation resulting in the formation of a polymer or dimer of immllnoglobulin, the immunoglobulin shows a marked increase in the complement-fixing property which is called anticomplementary action, leading to a) lowering the serum complement concentration upon intravenous administration to a human body or b) serious side effects such as anaphylactic shock. Accordingly, immunoglobulin has been formulated not as a liquid preparation but as a dry preparation, particularly, in a lyophilized form. However, the dry preparation is accompanied with the problem that it cannot be administered easily because of the necessity of dissolving it in distilled water for injection or the like upon use.
On the other hand, the liquid preparation does not require any dissolving operation in distilled water for injection or the like and can be a~mi ni stered easily compared with the dry preparation. As described above, however, it is accompanied with such drawbacks as inferiority in the stability of im~unoglobulin.
Accordingly, there has conventionally been an attempt to develop a liquid composition of imm-~noglobulin for intravenous injection having stability even in the form of a solution.
For e x~mpl e, JP-A-63-192724 (the term "JP-A" as used herein means an "un~mined published Japanese patent application" (U.S. Patent 4,876,088, EP 278422)) discloses a liquid globulin composition for intravenous injection having stability even in the form of a solution, said composition having a low conductivity and p~ of 5.5 + 0.2 and containing sorbitol as a stabilizer.
In addition, JP-A-58-43914 (U.S. Patents 4,396,608 and 4,499,073, EP 73371) discloses that in order to obtain an immllnoglobulin composition which is substantially free of an aggregate of i cunoglobulin and has a monomer content of ;mmllne serum globulin exceeding about 90%, a solution of the ;mmllne serum globulin is adjusted to have an ionic strength less than about 0.001 and a pH of 3.5 to 5Ø
JP-A-63-8340 (U.S. Patents 4,762,714 and 4,948,877, EP 240856) discloses a process for preparing immune serum globulin substantially free of an acquired virus, which comprises obtaining immune serum globulin from the human plasma source by the cold ethanol fractionating method at a pH of about 5.4 or lower and storing the ;mmllne serum globulin at a pH of about 4.25 or lower for at least about three days or storing it at a pH of about 6.8 or lower and a temperature of at least 45~C so as not to contain an infectious retrovirus substantially. However, the above-described invention aims at the inacti~ation of a retrovirus. It has not been reported that the immunoglobulin preparation thus obtained shows an improvement in the aggregation-wise problem of ;mmllnoglobulin.
JP-A-7-238036 (EP 702960) discloses that for the improvement of stability, the aggregation of immunoglobulin, in other words, an increase of not only a polymer of immunoglobulin but also a dimer of immllnoglobulin is suppressed by acid treatment or storage at room temperature.
WO 95-3826 discloses the immunoglobulin preparation comprising 0.1 g/L or less of non-ionic surfactant as stabilizer for maintA; ni ng solution state, and being substantially free of albumin.
S~MMARY OF THE INVENTION
As described above, immllnoglobulin is essentially an unstable protein so that the stability thereof upon preparation of a liquid composition is one of the great concerns.
An object of the present invention is to overcome the above-described problem and hence to provide an immllnoglobulin preparation having good storage stability even in the form of a solution.
With the foregoing in view, the present inventors have proceeded with an extensive investigation. As a result, they have been found that storage stability of immunoglobulin can be improved by reducing an am.ount of serum albumin existing as a contAminAnt in an immunoglobulin fraction to a trace amount, leading to the completion of the present invention.
The present inventors built up a hypothesis that fine particles existing in an immunoglobulin preparation would be a nucleus for forming insoluble foreign matter.
It has been found based on that hypothesis that the storage stability of the immllnoglobulin preparation can be improved by removing fine particles which may be a nucleus for forming the insoluble foreign matter, leading to the completion of the present invention.
This and other objects of the present invention have been accomplished by:
1) an immunoglobulin preparation (composition) comprising an immunoglobulin, wherein said preparation contains, as a contaminant, serum albumin in an amount not greater than 10 ~g per 50 mg of immunoglobulin;
2) an immunoglobulin preparation (composition) comprising an im~llnoglobulin, wherein said preparation is free of fine particles which can serve as a nucleus of insoluble foreign matteri and 3) a process for preparing the above immunoglobulin preparation 1) or 2), which comprises at least one step of:
treating an aqueous immllnoglobulin-containing solution with an anion exchanger;
treating an aqueous immllnoglobulin-containing solution with colloidal silica; and filtrating an aqueous immunoglobulin-cont~i ni ng solution through a porous m~mbrane having an average pore size of 1 to 100 nm.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will hereinafter be described more specifically. No particular limitation is imposed on the mode of immunoglobulin used for the immunoglobulin preparation of the present invention;
however, any mode of immunoglobulin available in the art can be used. Fx~mples include immunoglobulin prepared using, as a starting material, a fraction containing immunoglobulin, more specifically, fractions II + III, fraction II available by Cohn's ethanol fractionation, and paste of a similar fraction thereto containing immunoglobulin. A method of suspending such a fraction in an aqueous solvent to extract immunoglobulin can be used as a preparation process of immunoglobulin. At this time, an aqueous medium at least twice the volume, preferably, at least 5 times the volume of said fraction is used. Preferred ex~mrles of the aqueous medium usable here include water and an aqueous solution cont~;ning sodium chloride, hydrochloric acid, acetic acid or phosphoric acid, or a salt thereof. In addition, preferably, the pH ranges from 4 to 7, and the ionic strength ranges from 0.001 to 0.1 M.
~ x~mples of immunoglobulin include a chemical-modification free and complete-molecule immunoglobulin (for example, an immunoglobulin treated with polyethylene glycol, a pH about 4, or an ion exchange resin)i a chemically modified immunoglobulin (for ~Y~mple~ an alkylated or sulfonated immunoglobulin); and an enzyme-treated immunoglobulin (for ~Y~mrle~ an immllnoglobulin treated with an enzyme such as plasmin, pepsin or trypsin). Among these, a chemical-modification free and complete-molecule imml~noglobulin is used preferably.
The term "chemical-modification free and complete-molecule imm~noglobulin" as used herein means an immunoglobulin having the following various properties:
1) immllnoglobulin which is intact (natural) and not subjected to any artificial modification or change and therefore does not contain fragments of immllnoglobulin such as Fab, F(ab') 2 and Fc;
2) imml-noglobulin free from causing a lowering in the antibody titer and also absent ~imi ni shment in the antibody spectrum; and 3) immunoglobulin having an anticomplementary action (complement fixing property) sufficiently lower than 20 units (C~50 value) which is a value regarded safe in the Japanese Biological Preparation St~ ~ds.
As such a chemical-modification free and complete-molecule immunoglobulin, that obtained by any method can be used insofar as it is intact (natural) and has a low anticomplementary activity.
The chemical-modification free and complete-molecule immunoglobulin may be prepared in any manner.
~YAmples include ethanol fractionation, polyethylene glycol fractionation (JP-A-53-47515 (U.S. Patents 4,093,606 and 4,124,576)), fractionation by polyethylene glycol and hydroxyethyl starch used in combination (JP-A-51-91321), acid treatment (JP-A-57-32228 (U.S. Patent 4,371,520, EP 78331)), bentonite treatment (JP-A-57-77623) anion exchanger treatment ~JP-W-59-501546 (the term "JP-W" as used herein means a "published un~YAmined international application"), JP-A-60-42336], a combination of heating treatment and polyethylene glycol fractionation (JP-A-63-183539 (U.S. Patent 5,132,406, EP
246579)), and formulation into a liquid preparation (JP-A-58-43914 (U.S. Patents 4,396,608 and 4,499,073, EP
73371), JP-A-63-197274 (U.S. Patent 4,876,088, EP
278422)).
Preferably, the im~noglobulin obtained by one of the above methods is subjected to heating treatment.
les of the method for heating it in the for_ of a li~uid include a method of using a highly-concentrated sugar or sugar alcohol as a stabilizer (JP-A-61-191622 (EP 196761)) and a method of carrying out heating treatment at a low ionic strength and at an acid p~ by using a highly-concentrated sorbitol as a stabilizer (JP-A-63-146832 (U.S. Patent 4,845,199, EP 253313)).
F.x~mrles of the method for heating it in the dry form, on the other hand, include a method of using glycine, polyethylene glycol, sodium chloride, ~nn;tol or the like as a stabilizer (JP-A-61-78730 (U.S. Patent 4,721,777, EP 177836)) and a method of using a disaccharide or sugar alcohol as a stabilizer (JP-A-62-228024, JP-A-63-283933).
Also, the ;mmllnoglobulin may be subjected to virus-inactivating treatment other than heating treatment. ~x~mples thereof include trialkyl phosphate and/or detergent treatment (U.S. Patent 4,540,573, EP
131740), membrane filtration (WO 96-9839).
No particular limitation is imposed on the source of the ;mmllnoglobulin used in the present invention.
Specific ~x~m~les include human, mouse and rat. Among these, human is preferred. Specific ~Y~mrle of the ;mmllnoglobulin include a human ;mmllnoglobulin treated with polyethylene glycol.
The ;mmllnoglobulin preparation according to the present invention includes a preparation from which serum albumin as contaminant have been removed to some extent. ~x~mrles of methods for removing serum albumin include a contact treating method with an anion exchanger and a contact treating method with colloidal silica which will be described below.
A) Treatment with an anion exchanger This is a method of recovering a non-adsorbed fraction by the contact treatment with an anion exchanger.
i) Preparation of an anion exchanger An anion exchanger is an insoluble carrier having an anion exchange group bonded thereto. ~x~mples of the anion exchange group usable here include a diethylaminoethyl (DEAE) group and a quaternary aminoethyl (QAE) group. ~.x~m~les of the insoluble carrier include agarose, cellulose, dextran and polyacrylamide. They can be bonded in a manner known in the art.
ii) Treating method An imml~noglobulin fraction is dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably pH 5 to 6), and a low ionic strength (more preferably 0.0001 to 0.1 M). ~Y~mples of such an aqueous medium include an aqueous solution of sodium chloride, distilled water for injection and an acetate buffer. The immllnoglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a pH of 4 to 7 (more preferably 5 to 6).
The immunoglobulin solution thus prepared can then be subjected to contact treatment with an anion exchanger equilibrated with the above-described aqueous medium. ~x~mrles of this treatment include a batch method or a column method. In the batch method, for le, about 10 to 100 ml of an immllnoglobulin solution are mixed with about 1 ml of an anion exchanger, the resulting mixture is stirred at 0 to 4~C for about 30 minutes to 2 hours and then the reaction mixture is centrifuged at 6000 to 8000 rpm for 10 to 30 minutes to recover a supernatant. In the column method, on the other hand, for ~x~mrle, about 10 to 100 ml of an immunoglobulin solution is brought into contact with about 1 ml of an anion exchanger to recover a non-adsorbed fraction.
B) Treatment with colloidal silica This is a method of recovering a non-adsorbed fraction by contact treatment with colloidal silica.
i) Adsorbent FY~mples of the colloidal silica used as the adsorbent include silica gel, light silicic anhydride, diatomaceous earth, acid clay, bentonite, kaolin and magnesium silicate aluminate. Preferably, light silicic anhydride ("Aerosil", trade name; product of Nippon Aerosil Co., Ltd. and "Delipid", trade name; product of Zeta Inc.) are employed.
ii) Treating conditions The purified immunoglobulin is dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably 5 to 6) and a low ionic strength (more preferably 0.0001 to 0.1 M). ~YAm~les of the aqueous medium include those exemplified above in the treatment with the anion exchanger. The imml~noglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a pH of 4 to 7 (more preferably pH 5 to 6).
The immunoglobulin solution thus prepared may contain a ph~rm~ceutically acceptable additive (for ~x~mplet carrier, excipient, diluent), stabilizer and/or a ph~rm~ceutically necessary component which is used or~in~rily for pharmaceuticals within an extent not impairing the object of the present invention.
~ Y~mples of the stabilizer include monosaccharides (for ~Y~mple, glucose), disaccharides (for ~Y~mrle, saccharose, maltose), sugar alcohols (for ~ le, mannitol, sorbitol), neutral salts (for ~Y~mrle, sodium chloride), amino acids (for t~Y~mple, glycine), and nonionic surfactant (for ~x~mple, polyethylene glycol, polyoxyethylene-polyoxypropylene copolymer ("Pluronic", trade name), polyoxyethylene sorbitan fatty acid ester ("Tween", trade name)). The stabilizer is preferably added in an amount of about 1 to 10 w/v%.
Then, the immunoglobulin solution is subjected to contact treatment with the above-described adsorbent.
As the contact treatment conditions to be employed, the adsorbent is used in an amount of 1 to 30 g/liter when the concentration of ;mmllnoglobulin is 1 to 100 g/liter (more preferably 10 to 100 g/liter). This treatment can be carried out, for ~x~mple, by either a batch method or a column method. Among these, a batch method is preferred. In the batch method, mi xi ng and stirring are conducted under conditions, for ~Y~mple, at 5 to 25~C
for about 5 minutes to 1 hour. Then, the supernatant (non-adsorbed fraction) can be recovered by, for ex~mple, filtration or centrifugation.
The imm~lnoglobulin preparation from which serum albumin has been removed contains a cont~m;n~nt of serum albumin in an amount not greater than 10 ~g, preferably not greater than 5 ~g, per 50 mg of immunoglobulin.
Specifically, when the ;mmllnoglobulin preparation is in the form of a solution cont~;n;ng 5 w/v% of immunoglobulin, it contains a contaminant of serum albumin in an amount not greater than 10 ~g/ml, preferably not greater than 5 ug/ml. The immunoglobulin preparation having such properties ~xhihits more excellent storage stability than the conventional one.
For ~x~mrlel even after storage at 25~C for at least 30 days under shaking, or even at 37~C for at least 39 days, the imml~noglobulin preparation in the form of a solution is free of insoluble foreign matter. That is, insoluble foreign matter is not visually observed. As the assay of serum albumin in the immllnoglobulin preparation, methods known in the art can be employed. ~Y~mples include, ELISA method, Mancini's method and nephelometry.
C) Treatment with a porous membrane The immllnoglobulin preparation according to the present invention includes a preparation from which fine particles which can serve as a nucleus for the formation of insoluble foreign matter have been removed. ~x~m~les of removal methods include filtration methods through a porous membrane (for ~x~mple, in the form of a hollow yarn or a sheet).
No particular limitation is imposed on the material of the porous m~mhrane usable in the present invention. Preferred is regenerated cellulose.
~Y~mples of the form of the membrane include a hollow yarn and a sheet, with hollow yarn being preferred. For ~Y~mrler the porous hollow yarn made of regenerated cellulose is prepared preferably from an ammonium cupricellulose solution by the micro phase separation method ~American ~hemical Society, 9:197-228 (1985)].
The average pore size of the porous membrane is 1 to 100 nm, preferably 10 to 75 nm, more preferably 10 to 50 nm, and most preferably 35 + 2 nm. Its thickness is preferably 35 + 3.5 ~m. The membrane has preferably a multilayer structure. When the porous membrane is in the form of a hollow yarn, its internal diameter is preferably 330 + 30 ~m.
When the porous membrane is in the form of a hollow yarn, it is preferably used in the mode of a module. The module is composed of a porous hollow yarn membrane having preferably a membrane area of 0.001 to 1.0 m2, a container to be filled with the membrane and an a& esive to integrate them.
Filtration treatment through the porous membrane is carried out, for ~x~mple, as follows:
An immllnoglobulin fraction is first dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably pH 5 to 6) and a low ionic strength (more preferably 0.0001 to 0.1 M). ~x~mrles of the aqueous medium include an aqueous solution of sodium chloride, distilled water for injection and an acetate buffer. The immllnoglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a p~ of 4 to 7 (more preferably 5 to 6).
The immllnoglobulin solution thus prepared may contain a pharmaceutically acceptable additive (for le, carrier, excipient, diluent), stabilizer and/or a ph~rm~ceutically necessary component which is used for ph~m~ceuticals within an extent not impairing the object of the present invention.
~ Y~mrles of the stabilizer include monosaccharides (for ~x~mrle, glucose), disaccharides (for ~x~mrle, saccharose, maltose), sugar alcohols (for ~x~mrle~ m~n~itol~ sorbitol), neutral salts (for ~x~mple~
sodium chloride), amino acids (for ~x~mple, glycine) and nonionic surfactants (for ~x~mple, polyethylene glycol, polyoxyethylene-polyoxypropylene copolymer ("Pluronic", trade name), polyoxyethylene sorbitan fatty acid ester ("Tween", trade name)). The stabilizer is preferably added in an amount of about 1 to 10 w/v%.
The above-described immunoglobulin-cont~i~ing solution is filtered through a porous membrane. The filtration pressure or force at this time is 0.1 to 1 kgf/cm2, preferably 0.1 to 0.5 kgf/cm2, more preferably 0.1 to 0.3 kgf/cm2. The treating temperature is preferably 4 to 50~C.
~ x~mrles of the mode of the filtration treatment include the cross flow filtration method (circulation type) in which filtration is effected while a straining rate is given to a liquid and the dead end filtration method (non circulation type) in which filtration is carried out without giving a str~in;ng rate. The cross flow filtration method by pressed air is preferably adopted.
The filtration treatment can be carried out plural times. Prior to the above filtration treatment, the immtlnoglobulin-containing solution may be subjected to another filtration treatment.
The immllnoglobulin preparation thus prepared is a preparation from which insoluble fine particles having an average particle size not smaller than 100 nm, preferably not smaller than 75 nm, more preferably not smaller than 35 nm and/or soluble fine particles having a molecular weight larger than that of the immllnoglobulin (about 150000), both of which may become a nucleus for forming insoluble foreign matter, have been removed, so that even if the immllnoglobulin preparation in the form a solution is stored at 25~C for at least 30 days under shaking or at 37~C for at least 39 days, it does not cause aggregation of immunoglobulin, that is, generation of insoluble foreign matter, and hihits good storage stability. That is, insoluble foreign matter is not visually observed.
In the present invention, the above-described contact treatment with an anion exchanger or colloidal silica and filtration treatment through a porous membrane may be used in any combination thereof or alone, and the order of the treatments is not limited. However, preferably, the treatment with an anion exchanger, the treatment with colloidal silica and the treatment with a porous membrane are used in this order.
D) Final preparation (particularly liquid preparation) i) Preparation of liquid preparation By using the above-described method for preparing an ;mmllnoglobulin preparation for intravenous injection according to the present invention, an immunoglobulin preparation for intravenous injection can be obtained.
In a preferred embo~;m~nt, a chemical-modification free and complete-molecular ;mmll~oglobulin liquid composition (preparation) which can be administered intravenously can be obtained by adjusting an aqueous solution of a ch~ical-modification free and complete-molecular ;mmllnoglobulin to have a concentration of 1 to 10 w/v%
(more preferably 3 to 7 w/v%) by the conventional method, adjusting the resulting solution to contain a stabilizer, for ~Ample, sorbitol in an amount of 1 to 20 w/v% (more preferably 2 to 10 w/v%), to pH 5 to 6 (more preferably pH 5.5 + 0.2) and to have a low conductivity (more preferably a conductivity not higher than 1 mm~o, more preferably not higher than 0.6 mmho, each calculated in terms of 8~C) by known methods and then subjecting the resulting solution to sterilizing filtration, pouring in portions and the like based on the or~inAry formulating technique.
From the preparation thus formed, an immllnoglobulin liquid preparation for intravenous injection which contains chemical-modification free and complete-molecular immunoglobulin, has a pH of 5 to 6 (more preferably about 5.5 + 0.2) and a conductivity not greater than 1 mmho (more preferably not greater than 0.6 mm,ho, each calculated in terms of 8~C), that can be stored at room temperature, has an anticomplementary titer not greater than 20 units and has a content of the ~i m~r Of immllnoglobulin not greater than 7% can be produced.
When a safety range of the content of the im~llnoglobulin ~im~r is taken into consideration with regard to an immunoglobulin-contAining preparation for intravenous injection which comprises chemical-modification free and complete-molecular immllnoglobulin, the content of the immunoglobulin dimer is set at 7% or below, preferably 6% or below, and most preferably 4% or below.
The preparation according to the present invention has immllnoglobulin not substantially inactivated, contains neither an IgG polymer nor cont~min~nt, has good solubility and has sufficiently low anticomplementary action and is a safe preparation which can pass the biological preparation standards when a virus is inactivated, for ~Y~mrle, by heating treatment .
The immllnoglobulin preparation according to the present invention can be used as is or can be diluted with an appropriate solvent (for ~x~mple~ distilled water for injection, physiological saline, glucose solution) when it is a liquid preparation. When it is a dry preparation, on the other hand, the above-described immunoglobulin solution is lyophilized. It is dissolved in an appropriate solvent (for ~x~mpler distilled water for injection) upon use.
The a~mi~istration route of the immllnoglobulin preparation according to the present invention is generally by injection, with intravenous a~ministration being preferred. The immunoglobulin preparation of the present invention is preferably a~mi~istered intravenously in an amount of 50 to 1000 mg/day per 1 kg of body weight as immllnoglobulin for one day or for several possibly consecutive days. The dose may be increased or decreased based on the symptom, sex, body weight or the like of a patient.
The immllnoglobulin preparation according to the present invention is a preparation from which fine particles, which can be a nucleus for forming insoluble foreign matter, have been removed so that it has improved storage stability.
In addition, owing to a small amount of serum albumin as a contaminant, the immllnoglobulin preparation according to the present invention does not form insoluble foreign matter even in the form of a solution, compared with the conventional one and therefore has improved storage stability.
The present invention will hereinafter be described more specifically by ~xAmrles and tests. It should however be borne in mind that the present invention is not limited to or by them.
A paste (1 kg) of Fractions II + III obtained by the Cohn's cold alcohol fractionation method was dissolved in 10 liters of 0.6 w/v% sodium chloride. The resulting solution was adjusted to pH 3.8 with 1 N
hydrochloric acid and stirred at 4~C for 60 minutes, followed by acid treatment. While 500 g of polyethylene glycol having an average molecular weight of 4000 were added thereto and dissolved, 1 N sodium hydroxide was further added thereto to gradually increase its pH to 5Ø Immediately thereafter, the precipitate was removed by centrifugation to obtain a clear supernatant.
Polyethylene glycol (700 g) having an average molecular weight of 4000 was added to the supernatant. The resulting mixture was adjusted to pH 8.0 with 1 N sodium hydroxide under stirring gently. The immunoglobulin thus precipitated was recovered by centrifugation.
The ;mmllnoglobulin thus recovered was dissolved in a) physiological saline, or b) 0.02 M acetate buffer containing 0.6 w/v% sodium chloride and 2 w/v% m~nni tol.
A 5 w/v~ solution of immllnoglobulin was allowed to pass through a filter carrying anhydrous silica ("Zeta Delipid", trade name; product of Quno Corp.) to recover a non-adsorbed fraction. The non-adsorbed fraction was subjected to sterilizing filtration and lyophilization to obtain an immllnoglobulin preparation for intravenous A~mi ni stration suited for clinical use.
As a result of the assay by the Mancini's method, the albumin contained in the 5 w/v~ solution of the immllnoglobulin preparation thus obtained was found to be 10 ~g/ml or less.
To 1 kg of Cohn's fractions II + III obtained from the human plasma by the cold ethanol method, 10 liters of water were added, followed by extraction of IgG. After 50 g of sorbitol were added per 100 ml of the resulting supernatant and its pH was adjusted to 5.5, the resulting mixture was heated to 60~C for 10 hours.
Then, the reaction mixture was adjusted to p~ 5.5 and diluted three-fold with cold water for injection. To the diluted liquid, polyethylene glycol (average molecular weight: 4000) was added to give a final concentration of 8 w/v%. The resulting mixture was centrifuged at 2~C to obtain a supernatant. To the supernatant, 1 N sodium hydroxide was added to adjust its p~ to 8.8, and then polyethylene glycol (average molecular weight: 4000) was added thereto to give a final concentration of 12 w/v%. The resulting mixture was centrifuged at 2~C to obtain an IgG fraction precipitated. The IgG fraction thus obtained was dissolved in water for injection. To the resulting solution, DEAE-Sephadex equilibrated with water for injection was added (about 2 ml per 50 ml of the solution). Under a temperature of 0 to 4~C, the resulting mixture was subjected to contact treatment for about one hour. After the treatment, the DEAE-Sephadex was removed by filtration to recover a filtrate (IgG
solution).
The IgG solution thus recovered was diluted into a 5 w/v% solution with water for injection, and its pH
was adjusted to about 5.5 with sodium acetate. Sorbitol was then added thereto to gi~e a final concentration of 5%. The aqueous solution thus obtained (conductivity:
about 1 mmho) was allowed to pass through a filter carrying anhydrous silica similar to ~Y~mple 1 to recover a non-adsorbed fraction. The non-adsorbed fraction was further sterilized by filtration to obtain an ;mmllnoglobulin preparation for intravenous a~m; n istration.
The amount of albumin mixed in the resulting 5 w/v% IgG solution was found to be 5 ~g/ml as a result of the assay by the Mancini's method.
The imml-noglobulin preparation (5 w/v% solution) of the present invention which had been treated with colloidal silica and that without the treatment were compared in the con~min~nt amount of serum albumin in the immllnoglobulin solution and the formation degree of insoluble foreign matter after storage at 37~C for 39 days. The treatment with colloidal silica was carried out in accordance with the method as described in above FY~mrles. For the assay of serum albumin, the Mansini's method was employed and insoluble foreign matter was observed visually. The results are shown in Table 1.
Treated with Not treated with colloidal colloidal silica silica Content of serum 3 47 albumin (~g/ml) Insoluble foreign matter Just before - -storage Day 39 after - ++
storage -: No insoluble foreign matter was observed.
+: Some insoluble foreign matter was obser~ed.
++: Insoluble foreign matter was observed definitely.
The above results show that the ;mmllnoglobulin preparation treated with colloidal silica contains serum albumin in a markedly small amount and no insoluble foreign matter is observed even after storage at 37~C
for 39 days.
The paste (1 kg) of Fractions II + III obtained by the Cohn's cold alcohol fractionating method was dissolved in 10 liters of 0.6 w/v% sodium chloride, and it-C pH was adjusted to 3.8 with 1 N hydrochloric acid.
The resulting solution was subjected to acid treatment at 4~C for 60 minutes. While 500 g of polyethylene glycol having an average molecular weight of 4000 were added thereto and dissolved, 1 N sodium hydroxide was added thereto to gradually increase its pH to 5Ø
Tmm~i ately thereafter the precipitate was removed by centrifugation to obtain a clear supernatant. To the supernatant, 700 g of polyethylene glycol having an average molecular weight of 4000 were added. The resulting mixture was adjusted to pH 8.0 with 1 N sodium hydroxide under stirring gently. The immunoglobulin thus precipitated was centrifuged and the immll~oglobulin thus recovered was dissolved in a) physiological saline, or b) 0.02 M acetate buffer containing 0.6 w/v% sodium chloride and 2 w/v% m~nni tol.
Used as a porous membrane was a BBM module ("Planova 35", trade name) of a porous hollow yarn tBemberg Microporous Membrane, which will hereinafter be abbreviated as "BMM"] produced by Asahi Chemical Industries, Co., Ltd. The porous hollow yarn used in the module has a multilayer structure of at least 150 layers and it has a pore size of 35 + 2 nm, a membrane area of 0.001 to 1.0 m2, an internal diameter of a hollow yarn of 330 + 30 ~m and a membrane thickness of 35 + 3.5 ~m and is made of regenerated cellulose obtained by the cuprammonium process. The BMM module is integrated in a plastic container made of polycarbonate which can be sterilized with a high-pressure steam together with a polyurethane adhesive. Distilled water for injection fills the module. The safety of various materials constituting "Planova" has already been confirmed by the method established by the Japanese Pharmacopoeia (according to the explanatory note of BMM) hereby incorporated by reference.
The 5 w/v% immunoglobulin-cont~ining solution was adjusted to have a p~ of 6.4 to 7.2. After sterilizing filtration (pore size: 0.2 ~m, filtration through a membrane filter), the resulting solution was subjected to membrane filtration treatment (dead end filtration method using air pressure) at 5~C and a filtration pressure of 0.2 kgf/cm2 for 1 to 5 hours. After cooling, sterilizing treatment was carried out again, followed by pouring in portions and lyophilization to obtain a human immunoglobulin preparation suitable for intravenous injection was prepared.
To 1 kg of Cohn's Fractions II + III obtained from the human plasma by the cold ethanol method, 10 liters of water were added. After 50 g of sorbitol were added per 100 ml of the resulting solution, its pH was adjusted to 5.5, and the resulting mixture was heated at 60~C for 10 hours. Then, the reaction mixture was adjusted to pH 5.5 and diluted three-fold with cold water for injection. To the diluted liquid, polyethylene glycol (average molecular weight: 4000) was added to give a final concentration of 6 w/v%. The resulting mixture was centrifuged at 2~C to obtain a supernatant was obtained. To the supernatant, 1 N
sodium hydroxide was added to adjust its pH to 8.8, and the addition of polyethylene glycol (average molecular weight: 4000) was added thereto to give a final concentration of 12 w/v%. The resulting mixture was centrifuged at 2~C to obtain the IgG fraction precipitated. The IgG fraction thus precipitated was dissolved in water for injection. To the resulting solution, DEAE-Seph~x equilibrated with water was added (about 2 ml per 50 ml of the solution). Under a temperature of 0 to 4~C, the resulting mixture was subjected to contact treatment for about one hour, the DEAE-Sephadex was removed by filtration to recover a filtrate (IgG solution).
The IgG solution thus recovered was diluted into a 5 w/v% solution with water for injection, and its pH
was adjusted to about 5.5 with sodium acetate. Sorbitol was then added thereto to give a final concentration of 5%. The aqueous solution thus obtained was subjected to BMM treatment in the same manner as in ~Y~mple 3. The aqueous solutlon (conductivity: about 1 mmho) was subjected to sterilizing filtration to obtain a liquid immunoglobulin preparation suitable for intravenous a~mi ni stration.
A stability test against shaking at 25~C was made to compare the polyethylene glycol-treated, chemical-modification free and complete-molecular ;mmllnoglobulin for the intravenous administration subjected to BMM
treatment and that without BMM treatment. The pH during storage was set at 5.5. The evaluation was made by visually observing the formation degree of insoluble foreign matter. The results are shown in Table 2.
Time (day) Treated with BMM Not treated with BMM
- : No insoluble foreign matter is observed.
+/-: There are some cases where insoluble foreign matter is observed.
+: Some insoluble foreign matter is observed.
++: Insoluble foreign matter is observed definitely.
The above results show that the ;mmllnoglobulin preparation treated with BMM hardly forms insoluble foreign matter even after 30 days at 25~C, while insoluble foreign matters were observed definitely from the imml-noglobulin preparation without 3MM treatment after storage for 15 days at 25~C.
The IgG solution obtained in ~YAmrle 2 was diluted into a 5 w/v% IgG solution with water for injection, and its p~ was adjusted to about 5.5 with sodium acetate. Sorbitol was added thereto to give a final concentration of 5%. Then, the resulting mixture was treated with an anhydrous silica carrier in the same manner as in ~Y~mple 2, and a non-adsorbed fraction was recovered. Then, in the same manner as in ~Y~mple 4, the non-adsorbed fraction was treated with BMM to recover a non-adsorbed fraction. The resulting aqueous solution (conductivity: about 1 mmho) was subjected to sterilizing filtration to obtain an ;mmllnoglobulin liquid preparation for intravenous injection.
While the invention has been described in detail and with reference to specific embo~im~nts thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
has been used for preventing and treating various infectious diseases. The immllnoglobulin is unstable in the form of a solution. It is known that as a result of the aggregation of immunoglobulin, in other words, as a result of the denaturation of the immllnoglobulin during the fractionating operation resulting in the formation of a polymer or dimer of immllnoglobulin, the immunoglobulin shows a marked increase in the complement-fixing property which is called anticomplementary action, leading to a) lowering the serum complement concentration upon intravenous administration to a human body or b) serious side effects such as anaphylactic shock. Accordingly, immunoglobulin has been formulated not as a liquid preparation but as a dry preparation, particularly, in a lyophilized form. However, the dry preparation is accompanied with the problem that it cannot be administered easily because of the necessity of dissolving it in distilled water for injection or the like upon use.
On the other hand, the liquid preparation does not require any dissolving operation in distilled water for injection or the like and can be a~mi ni stered easily compared with the dry preparation. As described above, however, it is accompanied with such drawbacks as inferiority in the stability of im~unoglobulin.
Accordingly, there has conventionally been an attempt to develop a liquid composition of imm-~noglobulin for intravenous injection having stability even in the form of a solution.
For e x~mpl e, JP-A-63-192724 (the term "JP-A" as used herein means an "un~mined published Japanese patent application" (U.S. Patent 4,876,088, EP 278422)) discloses a liquid globulin composition for intravenous injection having stability even in the form of a solution, said composition having a low conductivity and p~ of 5.5 + 0.2 and containing sorbitol as a stabilizer.
In addition, JP-A-58-43914 (U.S. Patents 4,396,608 and 4,499,073, EP 73371) discloses that in order to obtain an immllnoglobulin composition which is substantially free of an aggregate of i cunoglobulin and has a monomer content of ;mmllne serum globulin exceeding about 90%, a solution of the ;mmllne serum globulin is adjusted to have an ionic strength less than about 0.001 and a pH of 3.5 to 5Ø
JP-A-63-8340 (U.S. Patents 4,762,714 and 4,948,877, EP 240856) discloses a process for preparing immune serum globulin substantially free of an acquired virus, which comprises obtaining immune serum globulin from the human plasma source by the cold ethanol fractionating method at a pH of about 5.4 or lower and storing the ;mmllne serum globulin at a pH of about 4.25 or lower for at least about three days or storing it at a pH of about 6.8 or lower and a temperature of at least 45~C so as not to contain an infectious retrovirus substantially. However, the above-described invention aims at the inacti~ation of a retrovirus. It has not been reported that the immunoglobulin preparation thus obtained shows an improvement in the aggregation-wise problem of ;mmllnoglobulin.
JP-A-7-238036 (EP 702960) discloses that for the improvement of stability, the aggregation of immunoglobulin, in other words, an increase of not only a polymer of immunoglobulin but also a dimer of immllnoglobulin is suppressed by acid treatment or storage at room temperature.
WO 95-3826 discloses the immunoglobulin preparation comprising 0.1 g/L or less of non-ionic surfactant as stabilizer for maintA; ni ng solution state, and being substantially free of albumin.
S~MMARY OF THE INVENTION
As described above, immllnoglobulin is essentially an unstable protein so that the stability thereof upon preparation of a liquid composition is one of the great concerns.
An object of the present invention is to overcome the above-described problem and hence to provide an immllnoglobulin preparation having good storage stability even in the form of a solution.
With the foregoing in view, the present inventors have proceeded with an extensive investigation. As a result, they have been found that storage stability of immunoglobulin can be improved by reducing an am.ount of serum albumin existing as a contAminAnt in an immunoglobulin fraction to a trace amount, leading to the completion of the present invention.
The present inventors built up a hypothesis that fine particles existing in an immunoglobulin preparation would be a nucleus for forming insoluble foreign matter.
It has been found based on that hypothesis that the storage stability of the immllnoglobulin preparation can be improved by removing fine particles which may be a nucleus for forming the insoluble foreign matter, leading to the completion of the present invention.
This and other objects of the present invention have been accomplished by:
1) an immunoglobulin preparation (composition) comprising an immunoglobulin, wherein said preparation contains, as a contaminant, serum albumin in an amount not greater than 10 ~g per 50 mg of immunoglobulin;
2) an immunoglobulin preparation (composition) comprising an im~llnoglobulin, wherein said preparation is free of fine particles which can serve as a nucleus of insoluble foreign matteri and 3) a process for preparing the above immunoglobulin preparation 1) or 2), which comprises at least one step of:
treating an aqueous immllnoglobulin-containing solution with an anion exchanger;
treating an aqueous immllnoglobulin-containing solution with colloidal silica; and filtrating an aqueous immunoglobulin-cont~i ni ng solution through a porous m~mbrane having an average pore size of 1 to 100 nm.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will hereinafter be described more specifically. No particular limitation is imposed on the mode of immunoglobulin used for the immunoglobulin preparation of the present invention;
however, any mode of immunoglobulin available in the art can be used. Fx~mples include immunoglobulin prepared using, as a starting material, a fraction containing immunoglobulin, more specifically, fractions II + III, fraction II available by Cohn's ethanol fractionation, and paste of a similar fraction thereto containing immunoglobulin. A method of suspending such a fraction in an aqueous solvent to extract immunoglobulin can be used as a preparation process of immunoglobulin. At this time, an aqueous medium at least twice the volume, preferably, at least 5 times the volume of said fraction is used. Preferred ex~mrles of the aqueous medium usable here include water and an aqueous solution cont~;ning sodium chloride, hydrochloric acid, acetic acid or phosphoric acid, or a salt thereof. In addition, preferably, the pH ranges from 4 to 7, and the ionic strength ranges from 0.001 to 0.1 M.
~ x~mples of immunoglobulin include a chemical-modification free and complete-molecule immunoglobulin (for example, an immunoglobulin treated with polyethylene glycol, a pH about 4, or an ion exchange resin)i a chemically modified immunoglobulin (for ~Y~mple~ an alkylated or sulfonated immunoglobulin); and an enzyme-treated immunoglobulin (for ~Y~mrle~ an immllnoglobulin treated with an enzyme such as plasmin, pepsin or trypsin). Among these, a chemical-modification free and complete-molecule imml~noglobulin is used preferably.
The term "chemical-modification free and complete-molecule imm~noglobulin" as used herein means an immunoglobulin having the following various properties:
1) immllnoglobulin which is intact (natural) and not subjected to any artificial modification or change and therefore does not contain fragments of immllnoglobulin such as Fab, F(ab') 2 and Fc;
2) imml-noglobulin free from causing a lowering in the antibody titer and also absent ~imi ni shment in the antibody spectrum; and 3) immunoglobulin having an anticomplementary action (complement fixing property) sufficiently lower than 20 units (C~50 value) which is a value regarded safe in the Japanese Biological Preparation St~ ~ds.
As such a chemical-modification free and complete-molecule immunoglobulin, that obtained by any method can be used insofar as it is intact (natural) and has a low anticomplementary activity.
The chemical-modification free and complete-molecule immunoglobulin may be prepared in any manner.
~YAmples include ethanol fractionation, polyethylene glycol fractionation (JP-A-53-47515 (U.S. Patents 4,093,606 and 4,124,576)), fractionation by polyethylene glycol and hydroxyethyl starch used in combination (JP-A-51-91321), acid treatment (JP-A-57-32228 (U.S. Patent 4,371,520, EP 78331)), bentonite treatment (JP-A-57-77623) anion exchanger treatment ~JP-W-59-501546 (the term "JP-W" as used herein means a "published un~YAmined international application"), JP-A-60-42336], a combination of heating treatment and polyethylene glycol fractionation (JP-A-63-183539 (U.S. Patent 5,132,406, EP
246579)), and formulation into a liquid preparation (JP-A-58-43914 (U.S. Patents 4,396,608 and 4,499,073, EP
73371), JP-A-63-197274 (U.S. Patent 4,876,088, EP
278422)).
Preferably, the im~noglobulin obtained by one of the above methods is subjected to heating treatment.
les of the method for heating it in the for_ of a li~uid include a method of using a highly-concentrated sugar or sugar alcohol as a stabilizer (JP-A-61-191622 (EP 196761)) and a method of carrying out heating treatment at a low ionic strength and at an acid p~ by using a highly-concentrated sorbitol as a stabilizer (JP-A-63-146832 (U.S. Patent 4,845,199, EP 253313)).
F.x~mrles of the method for heating it in the dry form, on the other hand, include a method of using glycine, polyethylene glycol, sodium chloride, ~nn;tol or the like as a stabilizer (JP-A-61-78730 (U.S. Patent 4,721,777, EP 177836)) and a method of using a disaccharide or sugar alcohol as a stabilizer (JP-A-62-228024, JP-A-63-283933).
Also, the ;mmllnoglobulin may be subjected to virus-inactivating treatment other than heating treatment. ~x~mples thereof include trialkyl phosphate and/or detergent treatment (U.S. Patent 4,540,573, EP
131740), membrane filtration (WO 96-9839).
No particular limitation is imposed on the source of the ;mmllnoglobulin used in the present invention.
Specific ~x~m~les include human, mouse and rat. Among these, human is preferred. Specific ~Y~mrle of the ;mmllnoglobulin include a human ;mmllnoglobulin treated with polyethylene glycol.
The ;mmllnoglobulin preparation according to the present invention includes a preparation from which serum albumin as contaminant have been removed to some extent. ~x~mrles of methods for removing serum albumin include a contact treating method with an anion exchanger and a contact treating method with colloidal silica which will be described below.
A) Treatment with an anion exchanger This is a method of recovering a non-adsorbed fraction by the contact treatment with an anion exchanger.
i) Preparation of an anion exchanger An anion exchanger is an insoluble carrier having an anion exchange group bonded thereto. ~x~mples of the anion exchange group usable here include a diethylaminoethyl (DEAE) group and a quaternary aminoethyl (QAE) group. ~.x~m~les of the insoluble carrier include agarose, cellulose, dextran and polyacrylamide. They can be bonded in a manner known in the art.
ii) Treating method An imml~noglobulin fraction is dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably pH 5 to 6), and a low ionic strength (more preferably 0.0001 to 0.1 M). ~Y~mples of such an aqueous medium include an aqueous solution of sodium chloride, distilled water for injection and an acetate buffer. The immllnoglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a pH of 4 to 7 (more preferably 5 to 6).
The immunoglobulin solution thus prepared can then be subjected to contact treatment with an anion exchanger equilibrated with the above-described aqueous medium. ~x~mrles of this treatment include a batch method or a column method. In the batch method, for le, about 10 to 100 ml of an immllnoglobulin solution are mixed with about 1 ml of an anion exchanger, the resulting mixture is stirred at 0 to 4~C for about 30 minutes to 2 hours and then the reaction mixture is centrifuged at 6000 to 8000 rpm for 10 to 30 minutes to recover a supernatant. In the column method, on the other hand, for ~x~mrle, about 10 to 100 ml of an immunoglobulin solution is brought into contact with about 1 ml of an anion exchanger to recover a non-adsorbed fraction.
B) Treatment with colloidal silica This is a method of recovering a non-adsorbed fraction by contact treatment with colloidal silica.
i) Adsorbent FY~mples of the colloidal silica used as the adsorbent include silica gel, light silicic anhydride, diatomaceous earth, acid clay, bentonite, kaolin and magnesium silicate aluminate. Preferably, light silicic anhydride ("Aerosil", trade name; product of Nippon Aerosil Co., Ltd. and "Delipid", trade name; product of Zeta Inc.) are employed.
ii) Treating conditions The purified immunoglobulin is dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably 5 to 6) and a low ionic strength (more preferably 0.0001 to 0.1 M). ~YAm~les of the aqueous medium include those exemplified above in the treatment with the anion exchanger. The imml~noglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a pH of 4 to 7 (more preferably pH 5 to 6).
The immunoglobulin solution thus prepared may contain a ph~rm~ceutically acceptable additive (for ~x~mplet carrier, excipient, diluent), stabilizer and/or a ph~rm~ceutically necessary component which is used or~in~rily for pharmaceuticals within an extent not impairing the object of the present invention.
~ Y~mples of the stabilizer include monosaccharides (for ~Y~mple, glucose), disaccharides (for ~Y~mrle, saccharose, maltose), sugar alcohols (for ~ le, mannitol, sorbitol), neutral salts (for ~Y~mrle, sodium chloride), amino acids (for t~Y~mple, glycine), and nonionic surfactant (for ~x~mple, polyethylene glycol, polyoxyethylene-polyoxypropylene copolymer ("Pluronic", trade name), polyoxyethylene sorbitan fatty acid ester ("Tween", trade name)). The stabilizer is preferably added in an amount of about 1 to 10 w/v%.
Then, the immunoglobulin solution is subjected to contact treatment with the above-described adsorbent.
As the contact treatment conditions to be employed, the adsorbent is used in an amount of 1 to 30 g/liter when the concentration of ;mmllnoglobulin is 1 to 100 g/liter (more preferably 10 to 100 g/liter). This treatment can be carried out, for ~x~mple, by either a batch method or a column method. Among these, a batch method is preferred. In the batch method, mi xi ng and stirring are conducted under conditions, for ~Y~mple, at 5 to 25~C
for about 5 minutes to 1 hour. Then, the supernatant (non-adsorbed fraction) can be recovered by, for ex~mple, filtration or centrifugation.
The imm~lnoglobulin preparation from which serum albumin has been removed contains a cont~m;n~nt of serum albumin in an amount not greater than 10 ~g, preferably not greater than 5 ~g, per 50 mg of immunoglobulin.
Specifically, when the ;mmllnoglobulin preparation is in the form of a solution cont~;n;ng 5 w/v% of immunoglobulin, it contains a contaminant of serum albumin in an amount not greater than 10 ~g/ml, preferably not greater than 5 ug/ml. The immunoglobulin preparation having such properties ~xhihits more excellent storage stability than the conventional one.
For ~x~mrlel even after storage at 25~C for at least 30 days under shaking, or even at 37~C for at least 39 days, the imml~noglobulin preparation in the form of a solution is free of insoluble foreign matter. That is, insoluble foreign matter is not visually observed. As the assay of serum albumin in the immllnoglobulin preparation, methods known in the art can be employed. ~Y~mples include, ELISA method, Mancini's method and nephelometry.
C) Treatment with a porous membrane The immllnoglobulin preparation according to the present invention includes a preparation from which fine particles which can serve as a nucleus for the formation of insoluble foreign matter have been removed. ~x~m~les of removal methods include filtration methods through a porous membrane (for ~x~mple, in the form of a hollow yarn or a sheet).
No particular limitation is imposed on the material of the porous m~mhrane usable in the present invention. Preferred is regenerated cellulose.
~Y~mples of the form of the membrane include a hollow yarn and a sheet, with hollow yarn being preferred. For ~Y~mrler the porous hollow yarn made of regenerated cellulose is prepared preferably from an ammonium cupricellulose solution by the micro phase separation method ~American ~hemical Society, 9:197-228 (1985)].
The average pore size of the porous membrane is 1 to 100 nm, preferably 10 to 75 nm, more preferably 10 to 50 nm, and most preferably 35 + 2 nm. Its thickness is preferably 35 + 3.5 ~m. The membrane has preferably a multilayer structure. When the porous membrane is in the form of a hollow yarn, its internal diameter is preferably 330 + 30 ~m.
When the porous membrane is in the form of a hollow yarn, it is preferably used in the mode of a module. The module is composed of a porous hollow yarn membrane having preferably a membrane area of 0.001 to 1.0 m2, a container to be filled with the membrane and an a& esive to integrate them.
Filtration treatment through the porous membrane is carried out, for ~x~mple, as follows:
An immllnoglobulin fraction is first dissolved in an appropriate aqueous solvent. The aqueous medium is preferred to have a pH of 4 to 7 (more preferably pH 5 to 6) and a low ionic strength (more preferably 0.0001 to 0.1 M). ~x~mrles of the aqueous medium include an aqueous solution of sodium chloride, distilled water for injection and an acetate buffer. The immllnoglobulin solution thus prepared is preferred to have a protein concentration of 1 to 15 w/v% (more preferably 3 to 10 w/v%) and a p~ of 4 to 7 (more preferably 5 to 6).
The immllnoglobulin solution thus prepared may contain a pharmaceutically acceptable additive (for le, carrier, excipient, diluent), stabilizer and/or a ph~rm~ceutically necessary component which is used for ph~m~ceuticals within an extent not impairing the object of the present invention.
~ Y~mrles of the stabilizer include monosaccharides (for ~x~mrle, glucose), disaccharides (for ~x~mrle, saccharose, maltose), sugar alcohols (for ~x~mrle~ m~n~itol~ sorbitol), neutral salts (for ~x~mple~
sodium chloride), amino acids (for ~x~mple, glycine) and nonionic surfactants (for ~x~mple, polyethylene glycol, polyoxyethylene-polyoxypropylene copolymer ("Pluronic", trade name), polyoxyethylene sorbitan fatty acid ester ("Tween", trade name)). The stabilizer is preferably added in an amount of about 1 to 10 w/v%.
The above-described immunoglobulin-cont~i~ing solution is filtered through a porous membrane. The filtration pressure or force at this time is 0.1 to 1 kgf/cm2, preferably 0.1 to 0.5 kgf/cm2, more preferably 0.1 to 0.3 kgf/cm2. The treating temperature is preferably 4 to 50~C.
~ x~mrles of the mode of the filtration treatment include the cross flow filtration method (circulation type) in which filtration is effected while a straining rate is given to a liquid and the dead end filtration method (non circulation type) in which filtration is carried out without giving a str~in;ng rate. The cross flow filtration method by pressed air is preferably adopted.
The filtration treatment can be carried out plural times. Prior to the above filtration treatment, the immtlnoglobulin-containing solution may be subjected to another filtration treatment.
The immllnoglobulin preparation thus prepared is a preparation from which insoluble fine particles having an average particle size not smaller than 100 nm, preferably not smaller than 75 nm, more preferably not smaller than 35 nm and/or soluble fine particles having a molecular weight larger than that of the immllnoglobulin (about 150000), both of which may become a nucleus for forming insoluble foreign matter, have been removed, so that even if the immllnoglobulin preparation in the form a solution is stored at 25~C for at least 30 days under shaking or at 37~C for at least 39 days, it does not cause aggregation of immunoglobulin, that is, generation of insoluble foreign matter, and hihits good storage stability. That is, insoluble foreign matter is not visually observed.
In the present invention, the above-described contact treatment with an anion exchanger or colloidal silica and filtration treatment through a porous membrane may be used in any combination thereof or alone, and the order of the treatments is not limited. However, preferably, the treatment with an anion exchanger, the treatment with colloidal silica and the treatment with a porous membrane are used in this order.
D) Final preparation (particularly liquid preparation) i) Preparation of liquid preparation By using the above-described method for preparing an ;mmllnoglobulin preparation for intravenous injection according to the present invention, an immunoglobulin preparation for intravenous injection can be obtained.
In a preferred embo~;m~nt, a chemical-modification free and complete-molecular ;mmll~oglobulin liquid composition (preparation) which can be administered intravenously can be obtained by adjusting an aqueous solution of a ch~ical-modification free and complete-molecular ;mmllnoglobulin to have a concentration of 1 to 10 w/v%
(more preferably 3 to 7 w/v%) by the conventional method, adjusting the resulting solution to contain a stabilizer, for ~Ample, sorbitol in an amount of 1 to 20 w/v% (more preferably 2 to 10 w/v%), to pH 5 to 6 (more preferably pH 5.5 + 0.2) and to have a low conductivity (more preferably a conductivity not higher than 1 mm~o, more preferably not higher than 0.6 mmho, each calculated in terms of 8~C) by known methods and then subjecting the resulting solution to sterilizing filtration, pouring in portions and the like based on the or~inAry formulating technique.
From the preparation thus formed, an immllnoglobulin liquid preparation for intravenous injection which contains chemical-modification free and complete-molecular immunoglobulin, has a pH of 5 to 6 (more preferably about 5.5 + 0.2) and a conductivity not greater than 1 mmho (more preferably not greater than 0.6 mm,ho, each calculated in terms of 8~C), that can be stored at room temperature, has an anticomplementary titer not greater than 20 units and has a content of the ~i m~r Of immllnoglobulin not greater than 7% can be produced.
When a safety range of the content of the im~llnoglobulin ~im~r is taken into consideration with regard to an immunoglobulin-contAining preparation for intravenous injection which comprises chemical-modification free and complete-molecular immllnoglobulin, the content of the immunoglobulin dimer is set at 7% or below, preferably 6% or below, and most preferably 4% or below.
The preparation according to the present invention has immllnoglobulin not substantially inactivated, contains neither an IgG polymer nor cont~min~nt, has good solubility and has sufficiently low anticomplementary action and is a safe preparation which can pass the biological preparation standards when a virus is inactivated, for ~Y~mrle, by heating treatment .
The immllnoglobulin preparation according to the present invention can be used as is or can be diluted with an appropriate solvent (for ~x~mple~ distilled water for injection, physiological saline, glucose solution) when it is a liquid preparation. When it is a dry preparation, on the other hand, the above-described immunoglobulin solution is lyophilized. It is dissolved in an appropriate solvent (for ~x~mpler distilled water for injection) upon use.
The a~mi~istration route of the immllnoglobulin preparation according to the present invention is generally by injection, with intravenous a~ministration being preferred. The immunoglobulin preparation of the present invention is preferably a~mi~istered intravenously in an amount of 50 to 1000 mg/day per 1 kg of body weight as immllnoglobulin for one day or for several possibly consecutive days. The dose may be increased or decreased based on the symptom, sex, body weight or the like of a patient.
The immllnoglobulin preparation according to the present invention is a preparation from which fine particles, which can be a nucleus for forming insoluble foreign matter, have been removed so that it has improved storage stability.
In addition, owing to a small amount of serum albumin as a contaminant, the immllnoglobulin preparation according to the present invention does not form insoluble foreign matter even in the form of a solution, compared with the conventional one and therefore has improved storage stability.
The present invention will hereinafter be described more specifically by ~xAmrles and tests. It should however be borne in mind that the present invention is not limited to or by them.
A paste (1 kg) of Fractions II + III obtained by the Cohn's cold alcohol fractionation method was dissolved in 10 liters of 0.6 w/v% sodium chloride. The resulting solution was adjusted to pH 3.8 with 1 N
hydrochloric acid and stirred at 4~C for 60 minutes, followed by acid treatment. While 500 g of polyethylene glycol having an average molecular weight of 4000 were added thereto and dissolved, 1 N sodium hydroxide was further added thereto to gradually increase its pH to 5Ø Immediately thereafter, the precipitate was removed by centrifugation to obtain a clear supernatant.
Polyethylene glycol (700 g) having an average molecular weight of 4000 was added to the supernatant. The resulting mixture was adjusted to pH 8.0 with 1 N sodium hydroxide under stirring gently. The immunoglobulin thus precipitated was recovered by centrifugation.
The ;mmllnoglobulin thus recovered was dissolved in a) physiological saline, or b) 0.02 M acetate buffer containing 0.6 w/v% sodium chloride and 2 w/v% m~nni tol.
A 5 w/v~ solution of immllnoglobulin was allowed to pass through a filter carrying anhydrous silica ("Zeta Delipid", trade name; product of Quno Corp.) to recover a non-adsorbed fraction. The non-adsorbed fraction was subjected to sterilizing filtration and lyophilization to obtain an immllnoglobulin preparation for intravenous A~mi ni stration suited for clinical use.
As a result of the assay by the Mancini's method, the albumin contained in the 5 w/v~ solution of the immllnoglobulin preparation thus obtained was found to be 10 ~g/ml or less.
To 1 kg of Cohn's fractions II + III obtained from the human plasma by the cold ethanol method, 10 liters of water were added, followed by extraction of IgG. After 50 g of sorbitol were added per 100 ml of the resulting supernatant and its pH was adjusted to 5.5, the resulting mixture was heated to 60~C for 10 hours.
Then, the reaction mixture was adjusted to p~ 5.5 and diluted three-fold with cold water for injection. To the diluted liquid, polyethylene glycol (average molecular weight: 4000) was added to give a final concentration of 8 w/v%. The resulting mixture was centrifuged at 2~C to obtain a supernatant. To the supernatant, 1 N sodium hydroxide was added to adjust its p~ to 8.8, and then polyethylene glycol (average molecular weight: 4000) was added thereto to give a final concentration of 12 w/v%. The resulting mixture was centrifuged at 2~C to obtain an IgG fraction precipitated. The IgG fraction thus obtained was dissolved in water for injection. To the resulting solution, DEAE-Sephadex equilibrated with water for injection was added (about 2 ml per 50 ml of the solution). Under a temperature of 0 to 4~C, the resulting mixture was subjected to contact treatment for about one hour. After the treatment, the DEAE-Sephadex was removed by filtration to recover a filtrate (IgG
solution).
The IgG solution thus recovered was diluted into a 5 w/v% solution with water for injection, and its pH
was adjusted to about 5.5 with sodium acetate. Sorbitol was then added thereto to gi~e a final concentration of 5%. The aqueous solution thus obtained (conductivity:
about 1 mmho) was allowed to pass through a filter carrying anhydrous silica similar to ~Y~mple 1 to recover a non-adsorbed fraction. The non-adsorbed fraction was further sterilized by filtration to obtain an ;mmllnoglobulin preparation for intravenous a~m; n istration.
The amount of albumin mixed in the resulting 5 w/v% IgG solution was found to be 5 ~g/ml as a result of the assay by the Mancini's method.
The imml-noglobulin preparation (5 w/v% solution) of the present invention which had been treated with colloidal silica and that without the treatment were compared in the con~min~nt amount of serum albumin in the immllnoglobulin solution and the formation degree of insoluble foreign matter after storage at 37~C for 39 days. The treatment with colloidal silica was carried out in accordance with the method as described in above FY~mrles. For the assay of serum albumin, the Mansini's method was employed and insoluble foreign matter was observed visually. The results are shown in Table 1.
Treated with Not treated with colloidal colloidal silica silica Content of serum 3 47 albumin (~g/ml) Insoluble foreign matter Just before - -storage Day 39 after - ++
storage -: No insoluble foreign matter was observed.
+: Some insoluble foreign matter was obser~ed.
++: Insoluble foreign matter was observed definitely.
The above results show that the ;mmllnoglobulin preparation treated with colloidal silica contains serum albumin in a markedly small amount and no insoluble foreign matter is observed even after storage at 37~C
for 39 days.
The paste (1 kg) of Fractions II + III obtained by the Cohn's cold alcohol fractionating method was dissolved in 10 liters of 0.6 w/v% sodium chloride, and it-C pH was adjusted to 3.8 with 1 N hydrochloric acid.
The resulting solution was subjected to acid treatment at 4~C for 60 minutes. While 500 g of polyethylene glycol having an average molecular weight of 4000 were added thereto and dissolved, 1 N sodium hydroxide was added thereto to gradually increase its pH to 5Ø
Tmm~i ately thereafter the precipitate was removed by centrifugation to obtain a clear supernatant. To the supernatant, 700 g of polyethylene glycol having an average molecular weight of 4000 were added. The resulting mixture was adjusted to pH 8.0 with 1 N sodium hydroxide under stirring gently. The immunoglobulin thus precipitated was centrifuged and the immll~oglobulin thus recovered was dissolved in a) physiological saline, or b) 0.02 M acetate buffer containing 0.6 w/v% sodium chloride and 2 w/v% m~nni tol.
Used as a porous membrane was a BBM module ("Planova 35", trade name) of a porous hollow yarn tBemberg Microporous Membrane, which will hereinafter be abbreviated as "BMM"] produced by Asahi Chemical Industries, Co., Ltd. The porous hollow yarn used in the module has a multilayer structure of at least 150 layers and it has a pore size of 35 + 2 nm, a membrane area of 0.001 to 1.0 m2, an internal diameter of a hollow yarn of 330 + 30 ~m and a membrane thickness of 35 + 3.5 ~m and is made of regenerated cellulose obtained by the cuprammonium process. The BMM module is integrated in a plastic container made of polycarbonate which can be sterilized with a high-pressure steam together with a polyurethane adhesive. Distilled water for injection fills the module. The safety of various materials constituting "Planova" has already been confirmed by the method established by the Japanese Pharmacopoeia (according to the explanatory note of BMM) hereby incorporated by reference.
The 5 w/v% immunoglobulin-cont~ining solution was adjusted to have a p~ of 6.4 to 7.2. After sterilizing filtration (pore size: 0.2 ~m, filtration through a membrane filter), the resulting solution was subjected to membrane filtration treatment (dead end filtration method using air pressure) at 5~C and a filtration pressure of 0.2 kgf/cm2 for 1 to 5 hours. After cooling, sterilizing treatment was carried out again, followed by pouring in portions and lyophilization to obtain a human immunoglobulin preparation suitable for intravenous injection was prepared.
To 1 kg of Cohn's Fractions II + III obtained from the human plasma by the cold ethanol method, 10 liters of water were added. After 50 g of sorbitol were added per 100 ml of the resulting solution, its pH was adjusted to 5.5, and the resulting mixture was heated at 60~C for 10 hours. Then, the reaction mixture was adjusted to pH 5.5 and diluted three-fold with cold water for injection. To the diluted liquid, polyethylene glycol (average molecular weight: 4000) was added to give a final concentration of 6 w/v%. The resulting mixture was centrifuged at 2~C to obtain a supernatant was obtained. To the supernatant, 1 N
sodium hydroxide was added to adjust its pH to 8.8, and the addition of polyethylene glycol (average molecular weight: 4000) was added thereto to give a final concentration of 12 w/v%. The resulting mixture was centrifuged at 2~C to obtain the IgG fraction precipitated. The IgG fraction thus precipitated was dissolved in water for injection. To the resulting solution, DEAE-Seph~x equilibrated with water was added (about 2 ml per 50 ml of the solution). Under a temperature of 0 to 4~C, the resulting mixture was subjected to contact treatment for about one hour, the DEAE-Sephadex was removed by filtration to recover a filtrate (IgG solution).
The IgG solution thus recovered was diluted into a 5 w/v% solution with water for injection, and its pH
was adjusted to about 5.5 with sodium acetate. Sorbitol was then added thereto to give a final concentration of 5%. The aqueous solution thus obtained was subjected to BMM treatment in the same manner as in ~Y~mple 3. The aqueous solutlon (conductivity: about 1 mmho) was subjected to sterilizing filtration to obtain a liquid immunoglobulin preparation suitable for intravenous a~mi ni stration.
A stability test against shaking at 25~C was made to compare the polyethylene glycol-treated, chemical-modification free and complete-molecular ;mmllnoglobulin for the intravenous administration subjected to BMM
treatment and that without BMM treatment. The pH during storage was set at 5.5. The evaluation was made by visually observing the formation degree of insoluble foreign matter. The results are shown in Table 2.
Time (day) Treated with BMM Not treated with BMM
- : No insoluble foreign matter is observed.
+/-: There are some cases where insoluble foreign matter is observed.
+: Some insoluble foreign matter is observed.
++: Insoluble foreign matter is observed definitely.
The above results show that the ;mmllnoglobulin preparation treated with BMM hardly forms insoluble foreign matter even after 30 days at 25~C, while insoluble foreign matters were observed definitely from the imml-noglobulin preparation without 3MM treatment after storage for 15 days at 25~C.
The IgG solution obtained in ~YAmrle 2 was diluted into a 5 w/v% IgG solution with water for injection, and its p~ was adjusted to about 5.5 with sodium acetate. Sorbitol was added thereto to give a final concentration of 5%. Then, the resulting mixture was treated with an anhydrous silica carrier in the same manner as in ~Y~mple 2, and a non-adsorbed fraction was recovered. Then, in the same manner as in ~Y~mple 4, the non-adsorbed fraction was treated with BMM to recover a non-adsorbed fraction. The resulting aqueous solution (conductivity: about 1 mmho) was subjected to sterilizing filtration to obtain an ;mmllnoglobulin liquid preparation for intravenous injection.
While the invention has been described in detail and with reference to specific embo~im~nts thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (15)
1. An immunoglobulin preparation comprising an immunoglobulin, wherein said preparation contains, as a contaminant, serum albumin in an amount not greater than 10 µg per 50 mg of immunoglobulin; and/or wherein said preparation is free of fine particles which can serve as a nucleus of insoluble foreign matter.
2. The immunoglobulin preparation according to claim 1, wherein said preparation contains, as a contaminant, serum albumin in an amount not greater than 10 µg per 50 mg of immunoglobulin; and wherein said preparation is free of fine particles which can serve as a nucleus of insoluble foreign matter.
3. The immunoglobulin preparation according to claim 1, wherein said preparation is free of insoluble foreign matter after storage at 37°C for at least 39 days in the form of a solution.
4. The immunoglobulin preparation according to claim 1, wherein said preparation is free of insoluble foreign matter after storage at 25°C for at least 30 days under shaking in the form of a solution.
5. The immunoglobulin preparation according to claim 1, wherein said preparation has a pH of 5 to 6, a conductivity not higher than 1 mmho (calculated in terms of 8°C), an anticomplementary value not greater than 20 units, and an IgG dimer content not higher than 7%.
6. The immunoglobulin preparation according to claim 1, wherein said preparation is subjected to virus inactivating treatment.
7. The immunoglobulin preparation according to claim 1, wherein said immunoglobulin is a chemical-modification free and complete-molecular immunoglobulin.
8. The immunoglobulin preparation according to claim 1, wherein said fine particles have an average particle size not smaller than 100 nm.
9. A process for preparing an immunoglobulin preparation according to claim 1, which comprises at least one step of:
treating an aqueous immunoglobulin-containing solution with an anion exchanger;
treating an aqueous immunoglobulin-containing solution with colloidal silica; and filtrating an aqueous immunoglobulin-containing solution through a porous membrane having an average pore size of 1 to 100 nm.
treating an aqueous immunoglobulin-containing solution with an anion exchanger;
treating an aqueous immunoglobulin-containing solution with colloidal silica; and filtrating an aqueous immunoglobulin-containing solution through a porous membrane having an average pore size of 1 to 100 nm.
10. The process according to claim 9, wherein said aqueous immunoglobulin-containing solution is treated with an anion exchanger at pH 4 to 7 and an ionic strength of 0.0001 to 0.1 M to recover a non-adsorbed fraction.
11. The process according to claim 9, wherein said aqueous immunoglobulin-containing solution is treated with colloidal silica at pH 4 to 7 and an ionic strength of 0.0001 to 0.1 M to recover a non-adsorbed fraction.
12. The process according to claim 9, wherein said aqueous immunoglobulin-containing solution is filtered through a porous membrane having an average pore size of 1 to 100 nm at pH 4 to 7 and an ionic strength of 0.0001 to 0.1 M to recover a non-adsorbed fraction.
13. The process according to claim 9, wherein said aqueous immunoglobulin-containing solution is treated with an anion exchanger, treated with colloidal silica; and filtrated through a porous membrane having an average pore size of 1 to 100 nm, in this order.
14. The process according to claim 9, wherein said immunoglobulin-containing solution is further subjected to virus inactivating treatment.
15. The process according to claim 9, wherein said aqueous immunoglobulin-containing solution is further subjected to polyethylene glycol fractionation.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-66441 | 1997-03-19 | ||
| JP9066441A JPH10265406A (en) | 1997-03-19 | 1997-03-19 | Immunoglobulin preparation |
| JP9-66448 | 1997-03-19 | ||
| JP06644897A JP4270590B2 (en) | 1997-03-19 | 1997-03-19 | Immunoglobulin preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2232420A1 true CA2232420A1 (en) | 1998-09-19 |
Family
ID=26407639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002232420A Abandoned CA2232420A1 (en) | 1997-03-19 | 1998-03-18 | Immunoglobulin preparation and preparation process thereof |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6124437A (en) |
| EP (1) | EP0865793A1 (en) |
| KR (1) | KR100572126B1 (en) |
| CN (1) | CN1198951A (en) |
| CA (1) | CA2232420A1 (en) |
| TW (1) | TW541179B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100632312B1 (en) * | 1997-10-23 | 2007-05-14 | 미쯔비시 웰 파마 가부시키가이샤 | Intravenous Intravenous Immunoglobulin Formulations Store at Room Temperature |
| WO2000066160A1 (en) * | 1999-04-28 | 2000-11-09 | Yamanouchi Pharmaceutical Co., Ltd. | Parenteral medicinal composition containing humanized monoclonal antibody fragment and method for stabilizing the same |
| AU2001278716A1 (en) * | 2000-08-10 | 2002-02-25 | Chugai Seiyaku Kabushiki Kaisha | Method of inhibiting antibody-containing solution from coagulating or becoming turbid |
| ES2184594B1 (en) * | 2001-01-17 | 2004-01-01 | Probitas Pharma Sa | PROCEDURE FOR THE PRODUCTION OF GAMMAGLOBULINA G HUMANA INACTIVADA OF VIRUS. |
| US20030068416A1 (en) * | 2001-09-24 | 2003-04-10 | Wilson Burgess | Method of lyophylization to reduce solvent content and enhance product recovery |
| EP3192528A1 (en) * | 2002-02-14 | 2017-07-19 | Chugai Seiyaku Kabushiki Kaisha | Formulation of anti-il6r antibody-containing solutions comprising a sugar as a stabilizer |
| US6902909B2 (en) * | 2002-07-09 | 2005-06-07 | Synthecon, Inc. | Methods for efficient production of mammalian recombinant proteins |
| AU2005229674B2 (en) * | 2004-11-18 | 2010-11-04 | Kedrion Melville Inc. | Low concentration solvent/detergent process of immuneglobulin with pre-treatment |
| WO2006103696A2 (en) * | 2005-04-01 | 2006-10-05 | Rubamin Laboratories Limited | Process for preparing levetiracetam and racemization of (r)- and (s)-2-amino butynamide and the corresponding acid derivatives |
| US8741600B2 (en) | 2007-06-19 | 2014-06-03 | Asahi Kasei Kabushiki Kaisha | Method for separation of immunoglobulin monomers |
| EP2361636A1 (en) * | 2010-02-26 | 2011-08-31 | CSL Behring AG | Immunoglobulin preparation and storage system for an immunoglobulin preparation |
| US8772462B2 (en) | 2010-05-26 | 2014-07-08 | Baxter International Inc. | Removal of serine proteases by treatment with finely divided silicon dioxide |
| AU2010202125B1 (en) | 2010-05-26 | 2010-09-02 | Takeda Pharmaceutical Company Limited | A method to produce an immunoglobulin preparation with improved yield |
| US8796430B2 (en) | 2010-05-26 | 2014-08-05 | Baxter International Inc. | Method to produce an immunoglobulin preparation with improved yield |
| US10420923B1 (en) * | 2010-08-10 | 2019-09-24 | Amiram Katz | Method and device for intrathecal administering of immunoglobulin |
| TWI629283B (en) | 2012-02-23 | 2018-07-11 | 巴克斯歐塔公司 | Fraction i-iv-1 precipitation of immunoglobins from plasma |
| US10414816B2 (en) * | 2014-03-11 | 2019-09-17 | Green Cross Holdings Corporation | Method for purifying immunoglobulin |
| US10287315B2 (en) * | 2014-03-11 | 2019-05-14 | Green Cross Holdings Corporation | Method for purifying immunoglobulin |
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| CA1064396A (en) * | 1975-02-18 | 1979-10-16 | Myer L. Coval | Fractional precipitation of gamma globulin with polyethylene glycol |
| DE2901822A1 (en) * | 1979-01-18 | 1980-07-31 | Biotest Serum Institut Gmbh | METHOD FOR THE PRODUCTION OF AN IMMUNOGLOBULIN SOLUTION SUITABLE FOR THE INTRAVENOUS APPLICATION THAT IGM CONTAINS IN A CONCENTRATED FORM |
| US4499073A (en) * | 1981-08-24 | 1985-02-12 | Cutter Laboratories, Inc. | Intravenously injectable immune serum globulin |
| US4396608A (en) * | 1981-08-24 | 1983-08-02 | Cutter Laboratories | Intravenously injectable immune serum globulin |
| US4371520A (en) * | 1981-10-28 | 1983-02-01 | The Green Cross Corporation | Process for preparing immunoglobulin suitable for intravenous injection |
| US4820805A (en) * | 1983-07-14 | 1989-04-11 | New York Blood Center, Inc. | Undenatured virus-free trialkyl phosphate treated biologically active protein derivatives |
| US4540573A (en) * | 1983-07-14 | 1985-09-10 | New York Blood Center, Inc. | Undenatured virus-free biologically active protein derivatives |
| US4835257A (en) * | 1984-07-07 | 1989-05-30 | Armour Pharma Gmbh | Process for preparing gamma globulin suitable for intravenous administration using peg and a citrate buffer |
| JPH0669961B2 (en) * | 1984-09-25 | 1994-09-07 | 株式会社ミドリ十字 | Immunoglobulin heat treatment method |
| JPH0825902B2 (en) * | 1985-02-21 | 1996-03-13 | 株式会社ミドリ十字 | Method for heat treatment of γ-globulin |
| FR2582515B1 (en) * | 1985-05-30 | 1988-11-04 | Merieux Inst | PROCESS FOR THE PREPARATION OF GAMMA-GOBULINS ADMINISTRABLE BY THE INTRAVENOUS ROUTE AND GAMMA-GLOBULINS OBTAINED |
| DE3604947A1 (en) * | 1986-02-17 | 1987-08-20 | Biotest Pharma Gmbh | METHOD FOR PRODUCING AN IMMUNALLOBULIN-CONTAINING PREPARATE AND THE USE THEREOF FOR PROPHYLAXIS AND THERAPY OF AIDS |
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| JPH0662436B2 (en) * | 1986-05-19 | 1994-08-17 | 株式会社ミドリ十字 | Method for producing intravenous immunoglobulin preparation |
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| DE3825429C2 (en) * | 1988-07-27 | 1994-02-10 | Biotest Pharma Gmbh | Method for producing an intravenously administrable polyclonal immunoglobulin preparation with a high IgM content |
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| JP3145696B2 (en) * | 1990-10-05 | 2001-03-12 | 日本ケミカルリサーチ株式会社 | Method for producing secretory immunoglobulin A preparation |
| US5110910A (en) * | 1991-03-25 | 1992-05-05 | Miles Inc. | Virucidal euglobulin precipitation |
| FR2708467B1 (en) * | 1993-07-30 | 1995-10-20 | Pasteur Merieux Serums Vacc | Stabilized immunoglobulin preparations and process for their preparation. |
| US5451660A (en) * | 1993-12-13 | 1995-09-19 | Genentech, Inc. | Method for purifying polypeptides |
| JPH07238036A (en) * | 1994-02-28 | 1995-09-12 | Green Cross Corp:The | Method for suppressing increase in globulin dimer of globulin liquid composition for intravenous injection |
| WO1996009839A1 (en) * | 1994-09-28 | 1996-04-04 | The Green Cross Corporation | Immunoglobulin preparation |
| FI952196A0 (en) * | 1995-05-08 | 1995-05-08 | Suomen Punainen Risti Veripalv | Immunoglobulin production |
| JPH0959180A (en) * | 1995-08-11 | 1997-03-04 | Nippon Zoki Pharmaceut Co Ltd | Activated immunoglobulin |
-
1998
- 1998-03-18 TW TW087103992A patent/TW541179B/en not_active IP Right Cessation
- 1998-03-18 CA CA002232420A patent/CA2232420A1/en not_active Abandoned
- 1998-03-18 US US09/040,400 patent/US6124437A/en not_active Expired - Lifetime
- 1998-03-19 KR KR1019980009407A patent/KR100572126B1/en not_active IP Right Cessation
- 1998-03-19 EP EP98105029A patent/EP0865793A1/en not_active Withdrawn
- 1998-03-19 CN CN98109788A patent/CN1198951A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR100572126B1 (en) | 2007-04-11 |
| US6124437A (en) | 2000-09-26 |
| TW541179B (en) | 2003-07-11 |
| EP0865793A1 (en) | 1998-09-23 |
| KR19980080440A (en) | 1998-11-25 |
| CN1198951A (en) | 1998-11-18 |
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