RAGE signaling is required for AMPA receptor dysfunction in the hippocampus of hyperglycemic mice.

Physiology & Behavior
Zeinab MomeniVerónica A Campanucci

Abstract

Diabetes in humans has been associated for a long time with cognitive dysfunction. In rodent animal models, cognitive dysfunction can manifest as impaired hippocampal synaptic plasticity. Particular attention has been concentrated on the receptor for advanced glycation end products (RAGE), which is implicated in multiple diabetic complications involving the development of vascular and peripheral nerve abnormalities. In this study, we hypothesize that RAGE signaling alters glutamate receptor function and expression, impairing synaptic transmission in the hippocampus. Using preparations of hippocampal slices from male mice, we show a RAGE-dependent decrease in long-term potentiation (LTP) and an increase in paired-pulse facilitation (PPF) following streptozotocin (STZ)-induced diabetes. Consistently, in hippocampal cultures from male and female neonatal mice, high glucose caused a RAGE-dependent reduction of AMPA- but not NMDA-evoked currents, and an increase in cytosolic reactive oxygen species (ROS). Consistently, when cultures were co-treated with high glucose and the RAGE antagonist FPS-ZM1, AMPA-evoked currents were unchanged. Hippocampi from STZ-induced hyperglycemic wild type (WT) mice showed increased RAGE expression conc...Continue Reading

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Citations

Jun 18, 2021·Diabetes, Metabolic Syndrome and Obesity : Targets and Therapy·Yanqi MaSongbo Fu
Jul 3, 2021·Journal of Cellular and Molecular Medicine·Jian LiuYu-Hong Wang

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