A Major Decomposition Product, Citrinin H2, from Citrinin on Heating with Moisture

Abstract

  Citrinin is one of the mycotoxins produced by Penicillium citrinum. We examined the decomposition products after heating citrinin in water at 140°C and isolated a major product, citrinin H2 (3-(3,5-dihydroxy-2-methylphenyl)-2-formyloxy-butane). Citrinin H2 did not show significant cytotoxicity to HeLa cells up to a concentration of 200 μg/ml (% cytotoxicity: 39%) in 63 h of incubation, but citrinin showed severe toxicity at a concentration of 25 μg/ml (% cytotoxicity: 73%). HPLC analysis of citrinin after heating under various conditions indicates that citrinin H2 is mainly yielded from citrinin.