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Глюкозостимулированной секреции инсулина в ƒ-клетках при усилении гликолиза и подавлении митохондриального метаболизма

Глюкозостимулированной секреции инсулина в ƒ-клетках при усилении гликолиза и подавлении митохондриального метаболизма

Abstract

Молекулярные механизмы, лежащие в основе глюкозостимулированной секреции в панкреатических ƒ-клетках, до конца не выяснены. С целью обнаружения метаболических нарушений, ослабляющих глюкозостимулированную секрецию инсулина, мы провели сравнительный анализ клональных ƒ-клеток линии INS-1 глюкозочувствительных (832/13) и глюкозонечувствительных (832/2). Были измерены следующие параметры: глюкозостимулированная секреция инсулина, скорость утилизации глюкозы (т.е. гликолиз), скорость клеточного дыхания, отражающая активность электронно-транспортной цепи, скорость митохондриальной продукции АТФ, активность комплексов I, III и IV электронно-транспортной цепи. Было установлено, что сопряженная метаболическая регуляция, усиливающая митохондриальный метаболизм и ограничивающая гликолиз в ƒ-клетках 832/13, требуется для стабильной глюкозозависимой секреции инсулина ƒ-клетки. ƒ-клеточные линии 832/13 и 832/2 могут быть также информативной моделью для изучения метаболических нарушений, развивающихся при СД2.

The molecular mechanisms underlying glucose-stimulated insulin secretion from pancreatic в-cells are not completely understood. To identify metabolic disturbances in в-cells that impair glucose-stimulated insulin secretion, we compared two INS-1-derived clonal в-cell lines, which are glucose-responsive (832/13) or glucose-unresponsive (832/2). We analysed insulin secretion, stimulated by glucose; rates of glucose utilization and glycolysis; rates of respiration reflecting electron transport chain activity; rates of mitochondrial ATP production; activities of complexes I, III and IV of the electron transport chain. We conclude that tight metabolic regulation enhancing mitochondrial metabolism and restricting glycolysis in 832/13 cells is required for clonal в-cells to secrete insulin in response to glucose. The 832 в-cell lines may be helpful tools to resolve metabolic perturbations occurring in Type 2 Diabetes.

Keywords

ƒ-КЛЕТКИ, ГЛИКОЛИЗ, МЕТАБОЛИЗМ, СЕКРЕЦИЯ ИНСУЛИНА, ƒ-CELLS

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average