Isolation of Mutagenic β-Carboline Derivatives after Nitrite Treatment of Maillard Reaction Mixtures and Analysis of These Compounds from Foodstuffs and Human Urine
作者:Shuichi MASUDA、Hisayuki KANAMORI、Naohide KINAE
DOI:10.1271/bbb.69.2232
日期:2005.1
Mixtures of carbohydrate decomposition products and L-tryptophan were incubated at pH 7.0 and 37 °C for 4 weeks. These mixtures exhibited mutagenic activity toward S. typhimurium TA 100 without metabolic activation after a nitrite treatment at pH 4.0. Four β-carboline derivatives were isolated as premutagens from mixtures of methylglyoxal and furfural. These premutagens were also found to be contained in daily foodstuffs and human urine samples.
碳水化合物分解产物和 L-色氨酸的混合物在 pH 7.0 和 37 °C 下孵育 4 周。这些混合物在 pH 4.0 下进行亚硝酸盐处理后,对鼠伤寒沙门氏菌 TA 100 表现出诱变活性,而没有代谢激活。从甲基乙二醛和糠醛的混合物中分离出四种β-咔啉衍生物作为预诱变剂。这些前诱变剂也被发现存在于日常食品和人类尿液样本中。