Abstract
Cytochrome P450 enzymes are responsible for the hydroxylation of various endogenous estrogens of the Phase I metabolic pathway. Cytochrome P450s produce hormonally active estrogen metabolites that are typically reactive and mutagenic. Although these metabolites are known to have important roles in autoimmunity, the underlying mechanism of this remains unknown. Here we report that cytochrome P450-mediated estrogen metabolites produce high ROS concentrations that can result in DNA damage. Such DNA damage can alter its immunogenicity, resulting in the induction and elevation of autoantibody concentrations, thus generating various autoimmune conditions. Here we focus on the mechanisms through which cytochrome P450-catalyzed estrogen metabolites induce immune responses and subsequently produce the autoimmune phenomenon.
Keywords: 2-hydroxyestradiol, 4-Hydroxyestradiol, autoimmunity, cytochromeP450, DNA, estrogen metabolites, ROS.
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