ArticleBiomolecules2026
Mitophagy Activation via the YAP/Parkin Pathway Underlies the Neuroprotective Action of Tetramethylpyrazine in Cerebral Ischemia/Reperfusion Injury.
Article in Biomolecules, 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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Abstract
backgroundMitophagy is a critical mitochondrial quality control mechanism that limits neuronal injury following cerebral ischemia/reperfusion injury (CI/RI). Tetramethylpyrazine (TMP), a bioactive alkaloid from
methodsCI/RI was induced using a middle cerebral artery occlusion/reperfusion (MCAO/R) model in mice and an oxygen-glucose deprivation/reoxygenation (OGD/R) model in HT22 cells. Neurological function, infarct volume, mitochondrial function, and mitophagy-related markers were assessed. Pharmacological inhibitors and genetic manipulation of YAP and Parkin were used to investigate underlying mechanisms.
resultsTMP treatment significantly reduced infarct volume and improved neurological deficits in MCAO/R mice, accompanied by enhanced mitophagy, as indicated by increased mitochondrial LC3 recruitment and Parkin expression. In OGD/R-injured HT22 cells, TMP promoted mitophagosome and mitolysosome formation, reduced mitochondrial reactive oxygen species, and restored mitochondrial membrane potential. Inhibition of mitophagy with Mdivi-1 attenuated TMP-mediated neuroprotection. Mechanistically, TMP promoted YAP nuclear localization, and inhibition of YAP or silencing of Parkin abolished TMP-induced mitophagy, while Parkin overexpression restored mitophagy under YAP inhibition.
conclusionsTMP alleviates CI/RI by promoting mitophagy through the YAP/Parkin signaling pathway, suggesting mitophagy modulation as a potential therapeutic strategy for ischemic brain injury.
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