Hexavalent chromium induces mitochondrial dynamics disorder in rat liver by inhibiting AMPK/PGC-1α signaling pathway

Occupational exposure to hexavalent chromium (Cr(VI)) can cause cytotoxicity and carcinogenicity. In this study, we established a liver injury model in rats via intraperitoneal injection of potassium dichromate (0, 2, 4, and 6 mg/kg body weight) for 35 d to investigate the mechanism of Cr(VI)-induce...

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Veröffentlicht in:Environmental pollution (1987) 2020-10, Vol.265, p.114855-114855, Article 114855
Hauptverfasser: Yang, Qingyue, Han, Bing, Xue, Jiangdong, Lv, Yueying, Li, Siyu, Liu, Yan, Wu, Pengfei, Wang, Xiaoqiao, Zhang, Zhigang
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Sprache:eng
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Zusammenfassung:Occupational exposure to hexavalent chromium (Cr(VI)) can cause cytotoxicity and carcinogenicity. In this study, we established a liver injury model in rats via intraperitoneal injection of potassium dichromate (0, 2, 4, and 6 mg/kg body weight) for 35 d to investigate the mechanism of Cr(VI)-induced liver injury. We found that Cr(VI) induced hepatic histopathological lesions, oxidative stress, and apoptosis and reduced the expression of mitochondrial-related regulatory factors such as adenosine 5′-monophosphate-activated protein kinase (AMPK) and peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) in a dose-dependent manner. Furthermore, Cr(VI) promoted mitochondrial division and inhibited fusion, leading to increased expression of caspase-3 and production of mitochondrial reactive oxygen species. Our study demonstrates that long-term exposure to Cr(VI) induces mitochondrial dynamics disorder by inhibiting AMPK/PGC-1α signaling pathway in rat liver. [Display omitted] •Cr(VI) can cause mitochondrial dynamics disorder in rat liver.•Mitochondrial dynamics disorder promotes oxidative stress and apoptosis in liver.•Cr(VI) exposure inhibits AMPK/PGC-1α signaling pathway in liver. Hexavalent chromium induces mitochondrial dynamics disorder in rat liver by inhibiting AMPK/PGC-1α signaling pathway.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2020.114855