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This study investigated DGAT1 in ischemic stroke using middle cerebral artery occlusion (MCAO) rat models and highly differentiated PC12 cells subjected to oxygen\u2013glucose deprivation\/reoxygenation (OGD\/R).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The therapeutic effects of DGAT1 inhibition in MCAO rats were assessed using the Zea-Longa score and 2,3,5-Triphenyltetrazolium chloride (TTC) staining. The effects on highly differentiated PC12 cells subjected to OGD\/R were evaluated using the Cell Counting Kit-8 (CCK-8) and lactate dehydrogenase (LDH) assays. Ferroptosis-related mitochondrial damage was evaluated using transmission electron microscope. Additionally, the mechanisms by which DGAT1 inhibition regulates ferroptosis were further explored via immunohistochemistry, immunofluorescence, Western blotting, qPCR, JC-1 assay, and reactive oxygen species (ROS) detection.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      DGAT1 expression was elevated in both MCAO and OGD\/R models. The DGAT1 inhibitor A 922500 improved neurological deficits, reduced infarct volume, and minimized neuronal loss in MCAO rats, while also enhancing cell viability and reducing LDH levels in OGD\/R-treated PC12 cells. DGAT1 inhibition significantly alleviated ferroptosis in MCAO rats, as indicated by (i) reduced mitochondrial shortening and cristae disruption, (ii) decreased 4-HNE levels, (iii) reduced MDA and increased SOD, and (iv) lowered levels of inflammatory factors (IL-6, MCP-1, and TNF-\u03b1). Moreover, both in vivo and in vitro experiments showed that DGAT1 inhibition significantly increased Gpx4 levels, whereas lentiviral delivery of Gpx4 shRNA markedly reversed its beneficial effects. In MCAO rats, Gpx4 shRNA significantly elevated 4-HNE levels and exacerbated ferroptosis-related mitochondrial damage. In vitro, DGAT1 inhibition increased mitochondrial membrane potential and reduced ROS, whereas rotenone, a mitochondrial function inhibitor, decreased Gpx4 and impaired cell viability. Furthermore, DGAT1 inhibition significantly upregulated the key \u03b2-oxidation gene\n                      <jats:italic>Cpt1a<\/jats:italic>\n                      , whereas etomoxir, a \u03b2-oxidation inhibitor, reduced cell viability and mitochondrial membrane potential, increased ROS, and downregulated Gpx4.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our study suggests that DGAT1 inhibition may enhance \u03b2-oxidation and mitochondrial function, thereby increasing Gpx4 levels, suppressing ferroptosis, and ultimately exerting neuroprotective effects in ischemic stroke.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s10020-025-01255-w","type":"journal-article","created":{"date-parts":[[2025,5,15]],"date-time":"2025-05-15T14:43:34Z","timestamp":1747320214000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Inhibition of diacylglycerol O-acyltransferase 1 provides neuroprotection by inhibiting ferroptosis in ischemic stroke"],"prefix":"10.1186","volume":"31","author":[{"given":"Youjie","family":"Zeng","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ren","family":"Guo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Songhua","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxin","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Si","family":"Cao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xia","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siyi","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huilin","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenxiang","family":"Qing","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heng","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen","family":"Ouyang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,5,15]]},"reference":[{"key":"1255_CR1","first-page":"243","volume":"7","author":"RM Adibhatla","year":"2008","unstructured":"Adibhatla RM, Hatcher JF. 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