Human placental lactogen (hPL) is a peptidic hormone that belongs to the short list of growth factors that could treat type-1 diabetes through pancreatic islet transplantation. Placental lactogen has the capacity to improve islet survival and function before or after transplantation. In this study,
Nicotine elicited membrane depolarization, elevation of intracellular calcium, rubidium efflux, and release of insulin from mouse beta-TC6 insulinoma cells. Such responses were blocked by the nicotinic antagonist mecamylamine but not by the muscarinic antagonist atropine. Neither the selective
Cigarette smoking is a well-recognized risk factor for type 2 diabetes (T2DM), and may result in islet β cell damage and impaired insulin secretion. However, the underlying mechanisms remain largely elusive. In the present study, we demonstrated that nicotine induced premature senescence of
We have produced the recombinant intracellular domain of human IA-2 (IA-2ic), a diabetes-associated autoantigen, in plants. This was achieved by transient expression using agroinfiltration of Nicotiana benthamiana plants. The resulting plant-derived IA-2ic had the expected size, reacted with
In order to assess the functional role of the polyamines spermidine and spermine in pancreatic beta-cells, we examined the effect of spermidine and spermine synthase inhibitors, trans-4-methylcyclohexylamine (MCHA) and N-(3-aminopropyl)cyclohexylamine (APCHA), on cellular polyamine and insulin
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