A review of brain insulin signaling in mood disorders: From biomarker to clinical target

Neuroscience and Biobehavioral Reviews
Thanh Thanh L NguyenSusannah J Tye

Abstract

Patients with mood disorders are at increased risk for metabolic dysfunction. Co-occurrence of the two conditions is typically associated with a more severe disease course and poorer treatment outcomes. The specific pathophysiological mechanisms underlying this bidirectional relationship between mood and metabolic dysfunction remains poorly understood. However, it is likely that impairment of metabolic processes within the brain play a critical role. The insulin signaling pathway mediates metabolic homeostasis and is important in the regulation of neurotrophic and synaptic plasticity processes, including those involved in neurodegenerative diseases like Alzheimer's. Thus, insulin signaling in the brain may serve to link metabolic function and mood. Central insulin signaling is mediated through locally secreted insulin and widespread insulin receptor expression. Here we review the preclinical and clinical data addressing the relationships between central insulin signaling, cellular metabolism, neurotrophic processes, and mood regulation, including key points of mechanistic overlap. These relationships have important implications for developing biomarker-based diagnostics and precision medicine approaches to treat severe mood dis...Continue Reading

Citations

Mar 15, 2020·Brain and Behavior·Jalaja MadhusudhananVasudharani Devanathan
Nov 20, 2018·Archives of Physiology and Biochemistry·Seham Zakaria NassarYasmine Amr Issa
Jan 27, 2021·CNS Neuroscience & Therapeutics·Farideh IravanpourAbolhassan Ahmadiani
Oct 1, 2021·Journal of Medicinal Chemistry·Terezie PáníkováJiří Jiráček

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