Abstract
Aflatoxin B1 (AFB1) induces hepatocellular carcinoma (HCC) through consumption of contaminated food in Southern China. Aldo-keto reductase-7A (AKR7A) functionally plays a potent role in the biodetoxification in the liver. In addition, hepatocellular lipid disorder has found to be closely linked to the development of HCC. This study was, therefore, designed to investigate the potent bioeffect of AKR7A on the lipid metabolism in AFB1-exposed hepatocellular carcinoma cells through assaying human cancerous samples and cell culture. In the baseline data, the HCC patients showed increased contents of AFB1 in sera and cancerous samples. In the clinical parameters, the HCC patients demonstrated changed lipid settings in sera. As revealed by immunostaining and immunoblotting, AFB1-elevated HCC sections showed marked down-regulation of AKR7A expression, accompanied with reduced ApoB expression and increased CD36, S6K1 expressions in the HCC. Studies in the human hepatocarcinoma line HepG2 also showed AFB1-exposure to increase ApoA1, LDL, TC, and TG contents; induce cell proliferation; and reduce hepatocellular AKR7A expression. Furthermore, AKR7A bioactivity was inactivated after treatment with perfluorooctane sulfonate (PFOS), an ApoB a...Continue Reading
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