Overnutrition causes insulin resistance and metabolic disorder through increased sympathetic nervous system activity.

ABSTRACT: The mechanisms underlying obesity-induced insulin resistance remain incompletely understood, as impaired cellular insulin signaling, traditionally considered the primary driver of insulin resistance, does not always accompany impaired insulin action. Overnutrition rapidly increases plasma norepinephrine (NE), suggesting overactivation of the sympathetic nervous system (SNS). However, the role of the SNS in obesity is controversial, as both increased and decreased SNS activity (SNA) have been reported. Here, we show that reducing catecholamine (CA) release from the SNS protects against overnutrition-induced insulin resistance as well as hyperglucagonemia, adipose tissue dysfunction, and fatty liver disease, as we demonstrate utilizing a mouse model of inducible and peripherally restricted d

SUBMITTER: Sakamoto K 

PROVIDER: S-EPMC11711004 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature