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20 November 2018 : Laboratory Research

Over-Expression of ATPase II Alleviates Ethanol-Induced Hepatocyte Injury in HL-7702 Cells

Qing Li1ABC, Yan Yang1ABC, Ying Liu1EF*

DOI: 10.12659/MSM.910254

Med Sci Monit 2018; 24: LBR8372-8382

Abstract

BACKGROUND: Excessive alcohol consumption can cause hepatocellular injury. ATPase II (ATP8A1) can display an ATP-dependent phospholipid translocase activity. However, the function of ATP8A1 in hepatocyte injury is still unclear. In the present study we explored the effect of ATP8A1 on ethanol-induced hepatocyte injury.

MATERIAL AND METHODS: A human hepatocyte strain, HL-7702, was pretreated by ethanol with gradient concentration for 2, 4, 8, and 12 h, and were then divided into 6 groups after the cells were transfected. We detected cell viability by use of the Cell Counting Kit-8 (CCK-8) assay. Reactive oxygen species (ROS), apoptosis rate, and mitochondrial membrane potential (MMP) were measured using flow cytometry. We used quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and Western blot to measure the mRNA and protein expression, respectively.

RESULTS: Ethanol inhibited the viability of HL-7702 cells and suppressed the expression of ATP8A1 in dose- and time-dependent manners. Furthermore, over-expression of ATP8A1 reduced the level of ROS and the apoptosis rate and recovered the MMP. Additionally, over-expressed ATP8A1 regulated the protein and mRNA levels of apoptosis-related molecules. Moreover, over-expression of ATP8A1 enhanced the phosphorylation of phosphatidylinositol 3-kinase (PI3K) and protein kinase B (Akt).

CONCLUSIONS: Over-expression of ATP8A1 alleviated ethanol-induced hepatocyte injury. Moreover, the PI3K/Akt signaling pathway appears to participate in inhibition of ethanol-induced hepatocyte apoptosis and may provide a candidate target for the treatment of alcoholic liver diseases (ALD).

Keywords: Arsenite Transporting ATPases, Hepatocytes, phosphatidylinositol 3-kinase

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750