Evidence mapPaperPMID 41800473Full record

ArticleAnimal models and experimental medicine2026

Molecular mechanism of ischemic postconditioning in promoting diabetic ischemic brain injury repair via the microRNA-34a-BDNF-SIX3 signaling axis.

Ling Zhao, Chunlan Zou, Junxian Li, Yang Yang, Yuanyuan Han, Tingyu Ke

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Article in Animal models and experimental medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Ling ZhaoDepartment of Endocrinology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.ORCID https://orcid.org/0009-0003-8001-8058
Chunlan ZouDepartment of Endocrinology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.
Junxian LiDepartment of Endocrinology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.
Yang YangDepartment of Endocrinology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.
Yuanyuan HanInstitute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming, China.
Tingyu KeDepartment of Endocrinology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.

Funding

Kunming Medical University Second Affiliated Hospital Talent Training Project RCTDXS-202308National Natural Science Foundation of China Project 82201475Yunnan Fundamental Research Kunming Medical University Joint Projects 202401AY070001-0004Yunnan Health Training Project of High Level Talents L-2025011Yunnan Province Xingdian Talents Support Program (Medical and Health Talents) XDYC-YLWS-2024-0021Yunnan Provincial High-Level Scientific and Technological Talent and Innovation Team Selection Special-Young and Middle-Aged Academic and Technical Leaders Reserve Talent Project 202405AC350061
6 · The paper itself

Abstract

backgroundThe underlying mechanisms for exacerbated brain injury and poor recovery observed in patients with diabetes and ischemic stroke (IS) remain undetermined. We explored the role of microRNA-34a (miR-34a) in diabetic IS (DMIS) and ischemic postconditioning (IPOC)'s neuroprotective effects in tree shrews.

methodsWe established a tree shrew DMIS model and exposed it to interventions, including miR-34a inhibition (antagomir), IPOC, and miR-34a overexpression (agomir). Infarct size and pathology were assessed via staining. Cellular/molecular changes (astrocytes, neurons, brain-derived neurotrophic factor [BDNF], Sine oculis homeobox 3 [SIX3], proliferation, apoptosis, axon formation) were analyzed using immunofluorescence, polymerase chain reaction (PCR), and Western blotting. In vitro, miR-34a's targeting of BDNF/SIX3 was validated, with rescue experiments testing regulation via these factors.

resultsInfarct size and neuronal damage were greater in the DMIS group than in the nondiabetic IS group. miR-34a inhibition or IPOC reduced infarcts, alleviated injury, improved cell survival, upregulated BDNF/SIX3, enhanced proliferation/axon formation, and reduced apoptosis. miR-34a overexpression reversed IPOC's benefits. In vitro, miR-34a directly targeted BDNF/SIX3, suppressing their expression; exogenous BDNF/SIX3 rescued neurotoxicity and restored function.

conclusionIPOC exerts partial neuroprotection through miR-34a downregulation, highlighting miR-34a as a potential therapeutic target.

Indexed as

Brain-Derived Neurotrophic FactorBrain IschemiaDiabetes Mellitus, ExperimentalHomeodomain ProteinsIschemic PostconditioningMicroRNAsNerve Tissue ProteinsAnimalsMaleSignal TransductionBrain-Derived Neurotrophic FactorHomeodomain ProteinsMicroRNAsNerve Tissue ProteinsBDNFdiabetes mellitusIPOCischemic strokemiR‐34aSIX3

Identifiers

PMID41800473
PMCPMC13383923

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.