We have reported that the administration of bisphenol A to rats reduces the conversion ratio of tryptophan to nicotinamide. In the present paper, we show that bisphenol A, a monomer of polycarbonate plastics, inhibits the enzyme activity of kynurenine 3-hydroxylase. Namely, the conversion ratio of tryptophan to nicotinamide is reduced through the inhibition of kynurenine 3-hydroxylase activity by bisphenol A.
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Fukuwatari et al. (2004) studied this question.
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