Mehrabian Sedighe
Department of Biology, Faculty of Science, Tarbiat Moalem University, Tehran, Iran.
Pak J Biol Sci. 2007 Mar 15;10(6):989-91. doi: 10.3923/pjbs.2007.989.991.
Tea is one of the most popular beverages consumed worldwide. The relationship between tea consumption and human cancer incidence is an important concern. The effect of tea extract and ingredients, polyphenol and caffeine on the mutagenicity of Sodium Azide was examined in vitro by using Salmonella typhimurium TA100, TA98 and TA1535 in the presence of induced rat liver S9 fractions. Experimental studies have demonstrated the significant antimutagenic and anticarcinogenic effects of both Green and Black tea and its polyphenol and caffeine multiple mutational assay. Caffeine was the less active. Tea comes in many variants. Common tea such as Black tea contains little antioxidant and the amount of caffeine. Green tea has about the caffeine, but contains a good amount of antioxidant.
茶是全球消费最广泛的饮品之一。茶的消费与人类癌症发病率之间的关系是一个重要关注点。通过在诱导的大鼠肝脏S9组分存在的情况下，使用鼠伤寒沙门氏菌TA100、TA98和TA1535，在体外检测了茶提取物及其成分多酚和咖啡因对叠氮化钠诱变性的影响。实验研究表明，绿茶和红茶及其多酚和咖啡因多重突变试验均具有显著的抗诱变和抗癌作用。咖啡因的活性较低。茶有许多变种。常见的茶如红茶含很少的抗氧化剂和咖啡因。绿茶含有约等量的咖啡因，但含有大量的抗氧化剂。
