A microparticle contains DNA coding for a polypeptide and oral administration of the microparticle leads to its expression. DNA coding for an immunogen is for stimulating antibody formation in a recipient and DNA coding for a non-immunogenic polypeptide is for gene therapy applications. DNA is incorporated...http://www.google.com/patents/US6667294?utm_source=gb-gplus-sharePatent US6667294 - Microencapsulated DNA for vaccination and gene therapy
