Biosignal Ltd.

A review.This review is focused on the mechanistic aspects of the insulin-induced H₂O₂ signaling pathway in neurons and the mols. affecting it, which act as risk factors for developing central insulin resistance.Insulin-induced H₂O₂ promotes insulin receptor activation and the mitochondria act as the insulin-sensitive H₂O₂ source, providing a direct mol. link between mitochondrial dysfunction and irregular insulin receptor activation.In this view, the accumulation of dysfunctional mitochondria during chronol. ageing and Alzheimer's disease (AD) is a risk factor that may contribute to the development of dysfunctional cerebral insulin receptor signaling and insulin resistance.Due to the high significance of insulin-induced H₂O₂ for insulin receptor activation, oxidative stress-induced upregulation of antioxidant enzymes, e.g., in AD brains, may represent another risk factor contributing to the development of insulin resistance.As insulin-induced H₂O₂ signaling requires fully functional mitochondria, pharmacol. strategies based on activating mitochondria biogenesis in the brain are central to the treatment of diseases associated with dysfunctional insulin receptor signaling in this organ.

This review is focused on the mechanistic aspects of the insulin-induced H2O2 signalling pathway in neurons and the molecules affecting it, which act as risk factors for developing central insulin resistance. Insulin-induced H2O2 promotes insulin receptor activation and the mitochondria act as the insulin-sensitive H2O2 source, providing a direct molecular link between mitochondrial dysfunction and irregular insulin receptor activation. In this view, the accumulation of dysfunctional mitochondria during chronological ageing and Alzheimer's disease (AD) is a risk factor that may contribute to the development of dysfunctional cerebral insulin receptor signalling and insulin resistance. Due to the high significance of insulin-induced H2O2 for insulin receptor activation, oxidative stress-induced upregulation of antioxidant enzymes, e.g., in AD brains, may represent another risk factor contributing to the development of insulin resistance. As insulin-induced H2O2 signalling requires fully functional mitochondria, pharmacological strategies based on activating mitochondria biogenesis in the brain are central to the treatment of diseases associated with dysfunctional insulin receptor signalling in this organ.