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SCD2 Alleviates Diabetes-Associated Cognitive Dysfunction by Improving Microglial Lipid Metabolism.

Overview

Authors: Yang Yang1, Juan He1, Jing Zheng1, Bing Shao2, Lixin Shi3, Miao Zhang1
ORCID iDs: Miao Zhang
  1. Department of Endocrinology and Metabolism The Affiliated Hospital of Guizhou Medical University Guiyang Guizhou China
  2. Department of Neurology The Affiliated Hospital of Guizhou Medical University Guiyang Guizhou China
  3. Department of Endocrinology and Metabolism GuiQian International General Hospital Guiyang Guizhou China
Journal: Cell proliferation, volume 59, issue 9, article e70221
Dates: received 16 July 2025; accepted 20 April 2026; published online 30 April 2026; in print September 2026
Type: Research article · Language: English
License: CC BY
Identifiers: DOI 10.1111/cpr.70221 · PMID 42062093 · PMCID PMC13325817 · OpenAlex W7159615602
Open access: gold, a free copy (OpenAlex)
Status: data only
Categories: mouse (organism), other condition (population), cellular / molecular (subfield)
Methods: Statistics, Smoothing, state filtering, decompositions
Keywords: diabetes‐associated cognitive dysfunction, lipid droplet accumulation, microglia, neuroinflammation, oxidative phosphorylation, SCD2
MeSH: Cognitive Dysfunction*, Diabetes Mellitus, Experimental*, Diabetes Mellitus, Type 2*, Lipid Metabolism*, Microglia*, Stearoyl-CoA Desaturase*, Animals, Hippocampus, Male, Mice, Mice, Inbred C57BL, Mitochondria (* major topic)
Topic: Neuroinflammation and Neurodegeneration Mechanisms (Neurology, Neuroscience), according to OpenAlex
Funding: Noncommunicable Chronic Diseases-National Science and Technology Major Project (2025ZD0550700/2025ZD0550703); Key Advantageous Discipline Construction Project of Guizhou Provincial Health Commission in 2024; Guizhou Province Science and Technology Project for qian ke he zhongda [2025] 008 (KJT‐2025005‐02); Doctor Start‐up Fund of Affiliated Hospital of Guizhou Medical University (gyfybsky‐2023‐02); Foundation Project for Science and Technology of Guizhou Provincial Health Commission in 2026 (gzwkj2026‐598); Project of Researching and Educating Students and Research Feedback on Teaching at the Affiliated Hospital of Guizhou Medical University in 2025 (gyfykj‐2025‐y20)
Citations: not cited yet (Europe PMC); 39 references in the paper

Abstract

The mechanisms underlying diabetes‐associated cognitive dysfunction (DACD) are not fully understood, and microglial metabolic dysfunction is emerging as a key contributor. This study investigates whether stearoyl‐CoA desaturase 2 (SCD2) alleviates cognitive impairment by modulating microglial lipid metabolism and function. Bioinformatics analysis of a single‐cell RNA‐seq dataset (GSE201644) identified SCD2 downregulation in diabetic (db/db) microglia. A T2D mouse model underwent hippocampal overexpression of SCD2 via AAV injection. In vitro, high glucose (HG)‐treated BV2 microglia‐like cells were subjected to SCD2 overexpression or oleic acid (OA) supplementation. Mitochondrial function (OCR, ATP, ETC complexes), lipid droplet accumulation (BODIPY, PLIN2), and inflammation (TNF‐α, IL‐6) were assessed. Cognitive behaviour (MWM, NOR) and neurophysiology (synaptic markers, neuronal survival) were evaluated. Diabetic microglia exhibited reduced SCD2 expression, impaired oxidative phosphorylation and lipid droplet accumulation (LDAM). SCD2 overexpression or OA rescued mitochondrial function, mitigated lipid droplet accumulation and attenuated inflammation. In vivo, hippocampal SCD2 overexpression attenuated neuroinflammation, preserved synaptic integrity and improved cognition in diabetic mice. SCD2 is essential for maintaining microglial lipid and mitochondrial homeostasis in diabetes. Restoring SCD2 function alleviates neuroinflammation and synaptic deficits, thereby rescuing cognitive impairment, highlighting its therapeutic potential for DACD.

Reproduced under the paper's license (CC BY), from the paper cited above.

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Data

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Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Reproduced under the paper's license (CC BY), from the paper cited above.

Versions

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Version 1, 30 September 2026: the first record

Recorded: type, language, journal, volume, issue, pages, dates, 6 authors, 6 keywords, 12 MeSH terms, 6 funders, 39 references.

Cite

This paper

Yang, Y., He, J., Zheng, J., Shao, B., Shi, L., & Zhang, M. (2026). SCD2 Alleviates Diabetes-Associated Cognitive Dysfunction by Improving Microglial Lipid Metabolism. Cell proliferation, 59(9), e70221. https://doi.org/10.1111/cpr.70221

BibTeX

@article{yang2026scd2,
author = {Yang, Yang and He, Juan and Zheng, Jing and Shao, Bing and Shi, Lixin and Zhang, Miao},
title = {{SCD2 Alleviates Diabetes-Associated Cognitive Dysfunction by Improving Microglial Lipid Metabolism}},
journal = {Cell proliferation},
year = {2026},
month = apr,
volume = {59},
number = {9},
pages = {e70221},
publisher = {Wiley},
issn = {0960-7722},
doi = {10.1111/cpr.70221},
url = {https://doi.org/10.1111/cpr.70221},
pmid = {42062093},
pmcid = {PMC13325817}
}

RIS

TY - JOUR
AU - Yang, Yang
AU - He, Juan
AU - Zheng, Jing
AU - Shao, Bing
AU - Shi, Lixin
AU - Zhang, Miao
TI - SCD2 Alleviates Diabetes-Associated Cognitive Dysfunction by Improving Microglial Lipid Metabolism
T2 - Cell proliferation
J2 - Cell Prolif
PY - 2026
DA - 2026/04/30
VL - 59
IS - 9
SP - e70221
SN - 0960-7722
PB - Wiley
DO - 10.1111/cpr.70221
UR - https://doi.org/10.1111/cpr.70221
LA - en
ER -

CSL-JSON

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