Oxidative stress, altered cell proliferation, genotoxicity including altered DNA methylation, co-carcinogenesis, and tumor promotion are the potential mechanisms, as described previously.

• 到目前为止，人类对砷的毒性作用机制还不是很清楚，但存在多种假设：氧化应激，影响细胞增殖，产生基因毒性如影响DNA甲基化、协同致癌、肿瘤促发等。