Orotic acid protects pancreatic β cell by p53 inactivation in diabetic mouse model.

Biochemical and biophysical research communications(2021)

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摘要
Impairment of pancreatic β cells is a principal driver of the development of diabetes. Restoring normal insulin release from the β cells depends on the ATP produced by the intracellular mitochondria. In maintaining mitochondrial function, the tumor suppressor p53 has emerged as a novel regulator of metabolic homeostasis and participates in adaptations to nutritional changes. In this study, we used orotic acid, an intermediate in the pathway for de novo synthesis of the pyrimidine nucleotide, to reduce genotoxicity. Administration of orotic acid reduced p53 activation of MIN6 β cells and subsequently reduced β cell death in the db/db mouse. Orotic acid intake helped to maintain the islet size, number of β cells, and protected insulin secretion in the db/db mouse. In conclusion, orotic acid treatment maintained β cell function and reduced cell death, and may therefore, be a future therapeutic strategy for the prevention and treatment of diabetes.
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