A method is described to diagnose (1) renal salt wasting syndrome and (2) Alzheimer's disease among dementia patients by measuring a patient's level of prostaglandin D2 synthase. Methods are also described to (1) treat renal salt wasting syndrome, (2) inhibit the rate of apoptosis or (3) prevent the...http://www.google.com/patents/US6458549?utm_source=gb-gplus-sharePatent US6458549 - Methods of diagnosing renal salt wasting syndrome and Alzheimer's disease and methods of treating the same