A Ca²⁺ chelator ameliorates chromium (VI)-induced hepatocyte L-02 injury via down-regulation of voltage-Dependent anion channel 1 (VDAC1) expression

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• 作者：Xing Yi^a ; Fang Xiao^a ; Xiali Zhong^a ; Yujie Duan^b ; Kaihua Liu^a ; Caigao Zhong^a ; ^{caigaozhong@gmail.com}
• 关键词：Hexavalent chromium [Cr(VI)] ; Voltage-dependent anion channel 1 (VDAC1) ; Intracellular calcium content ([Ca2+]i) ; 1 ; 2-bis(2-aminophenoxy)ethane-N ; N ; N&rsquo ; N&rsquo ; -tetraacetic acid tetrakis(acetoxymethyl ester) (BAPTA-AM) ; Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ; L-02 hepatocytes
• 刊名：Environmental Toxicology and Pharmacology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：49
• 期：Complete
• 页码：27-33
• 全文大小：1239 K
• 卷排序：49

文摘

Hexavalent chromium could result in cell malfunctions. Intracellular Ca2+ ([Ca2+]i) content and VDAC1 expression are both important features related to cell survial. This study aimed to explore the mechanism of cell injury induced by Cr(VI) and tentatively offer clues to repairing this cell damage using [Ca2+]i and VDAC1. L-02 hepatocytes were treated with Cr(VI)/BAPTA, and the levels of [Ca2+]i and cell injury associated with Cr(VI) were determined in addition to the effect of BAPTA. The expression of VDAC1 in Cr(VI)-induced cells was evaluated. The results showed a dose-dependent elevation of the level of VDAC1 and the mRNA level of the VDAC1 biogenesis-related gene Sam50. BAPTA could ameliorate less severe damage induced by 4 μM Cr(VI) via reducing VDAC1 and Sam50. Additionally, cell injury caused by less than 4 μM Cr(VI) could be ameliorated by VDAC1 knockdown. Taken together, the findings of this study suggest that inhibition of intracellular Ca2± overload could protect cells from damage and that VDAC1 plays a considerable role in Cr(VI)-induced liver injury.