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^^^^^^GREETINGS FROM^^^^^^^^^^ Ivan Suzman 47/10 [log in to unmask] Portland, Maine land of lighthouses 59 deg. F sunny ***************************************************** Hi Phil, My medical physiology text indicated (I lost my library to a fire last August) that insulin is inhibited by adrenalin. Dopamine , meanwhile, is a precursor of noradrenalin, which in turn is the precursor to adrenalin. So there is a dopamine-adrenalin connection, and also, probably, a blood sugar connection, through insulin. A Ph.D. biochemist or a physician-researcher or an unusually well-informed neurologist or a local medical school professor could help you, I would guess. I don't have the books anymore, but try any medical school Introduction to Medical Biochemistry text. I believe that the gene or genes involved in Parkinson's can and often do influence adrenalin, and this may account for the high incidence of diabetes among relatives of PWP's, as well as the increased abnormalities in blood sugar regulation in PWP's. I hope this helps. I am not a qualified source, not being a specialist in medical biochemistry. I was an anatomist. Ivan Suzman (formerly an Asst. Professor of Anatomy at the University of Minnesota Medical School, and the University of New England Medical School)