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Atorvastatin inhibits ischemia-reperfusion-associated renal tubular cell ferroptosis by blocking the PGE2/EP4 signaling pathway

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机构: [1]Fuwai Yunnan Cardiovasc Hosp, Dept Anesthesiol, Kunming 650102, Peoples R China [2]Yunnan Ctr Dis Control & Prevent, Expanded Program Immunizat Dept, Kunming 650022, Peoples R China [3]Kunming Med Univ, Affiliated Hosp 1, Dept Anesthesiol, Kunming 650032, Peoples R China
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关键词: Renal ischemia-reperfusion injury Atorvastatin Ferroptosis PGE2/EP4 signaling pathway Renal tubular epithelial cells

摘要:
Renal ischemia-reperfusion (I/R) injury is the main cause of acute kidney injury, and its pathological features are manifested primarily by renal tubular epithelial cell injury. The underlying mechanism involves ferroptosis of renal tubular epithelial cells. Atorvastatin (ATO) regulates ferroptosis, and this study explored its role in I/R-induced ferroptosis of renal tubular epithelial cells. We constructed a renal I/R rat model with bilateral renal pedicles using noninvasive arterial clips and placed HK-2 cells in hypoxia/reoxygenation (H/R) incubators to construct the cell model. The damage to rat kidney tissues and HK-2 cells was assessed using enzyme-linked immunosorbent assay (ELISA), hematoxylin and eosin (H&E) staining, and flow cytometry, and the presence of associated proteins was identified through western blotting. Administering ATO markedly lessened the acute kidney damage caused by I/R, decreased the levels of blood urea nitrogen (BUN) and creatinine (CRE), and prevented apoptosis in renal tubular epithelial cells. Treatment with ATO additionally suppressed the production of inflammatory cytokines (TNF-alpha, IL-1 beta, and IL-6) and markers linked to ferroptosis (Fe2+, ROS, MDA, ACSL4, and COX2), thereby reducing acute kidney damage associated with I/R. The expression of PGE2 in renal I/R injury is related to the degree of renal injury, and it mainly regulates ferroptosis by binding to EP4. ATO effectively inhibited the expression of PGE2 and EP4. Overall, this study revealed that ATO inhibited ferroptosis of renal tubular epithelial cells by blocking the PGE2/EP4 signaling pathway, thereby alleviating I/R-induced kidney injury.

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大类 | 4 区 生物学
小类 | 4 区 细胞生物学 4 区 发育生物学
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Q4 CELL BIOLOGY Q4 DEVELOPMENTAL BIOLOGY

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第一作者机构: [1]Fuwai Yunnan Cardiovasc Hosp, Dept Anesthesiol, Kunming 650102, Peoples R China
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