A study on the mutagenic effect of dichloromethane extract of pickled vegetables from high risk area for nasopharyngeal carcinoma (NPC)-in Sihui County

Abstract

The mutagenic effect of dichloromethane extract of pickles collected from Sinhui County was examined. Sample I markedly increased the frequency of sister chromatid exchange (SCE) and the rate of micronucleus (MN) in mice. Sample II also induced an increase in SCE frequency significantly, but the increase in MN rate was slight. Chemical analyses showed that two samples of pickles contained 37.83ppb and 33.38ppb of volatile nitrosamines, respectively, which alone could not explain the observed mutagenic effect. These results sug ested that the pickled vegetables taken from NPC high-risk area, Sihui County, may contain some mutagen(s) besides volatile nitrosamines.

本文報告四會縣醃菜二氯甲烷提取液的誘變性試驗。醃菜樣本提取液Ⅰ號引起姐妹染色單體交換(SCE)率及微核(MN)率顯著升高,醃菜樣本提取液Ⅱ號亦引起SCE率明顯升高,但MN率僅略有升高。化學分析表明,該兩份醃菜的揮發性亞硝胺含量分別為37.83、33.38 ppb。醃菜提取液的誘變性似不能單用亞硝胺來解釋。實驗結果提示,鼻咽癌高發區四會縣醃菜中可能含有除揮發性亞硝胺以外的其他誘變性物質。