Development of anti-diabetic zinc medicine protecting the pancreatic B cells through the GPR39-stimulating Pdx-1 expression

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Zinc is one of the essential trace elements playing an important role in our life. From the recent studies of molecular biology, the zinc-homeostasis in the animal body has been found to be properly controlled by 22 kinds of zinc transporters. Concerning the Japanese aging of the population, lifestyle-related diseases as metabolic-syndromes mainly derived from obesity and type-2 diabetes are more urgent issues.From these backgrounds, we have investigated the anti-diabetic action and effects of zinc closely related with insulin homeostasis and activity, and succeeded the development of several orally-active zinc complexes. In this study, first we focused to cure both the type 1 and type 2 diabetes on the basis of activatiing transpciption factor, Pdx-1, expressed in the pancreas. Secondly, we indicated the new positive results for both the biochemical and morphological analyses of dramatically improved pancreas and liver in zinc complex-treated type-2 diabetic KK-Ay mice.