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自80年代以来,大量的细胞培养和动物实验都证明茶叶及其提取物有防癌抗癌作用,一些流行病学调查结果也提示饮茶与某些人类肿瘤低发有关。随着研究工作的不断深入,在探索茶叶防癌抗癌机制方面,也取得了一些成果。现将部分有关文献作一综述。1 阻断前致癌物转变成致癌物亚硝胺类是强致癌物,亚硝酸盐和胺类是直接参与合成强致癌物的前体。绿茶及其提取物能有效地阻断亚硝胺类在体内外的形成。Stich等将茶叶和亚硝酸盐一起加入咸
Since the 1980s, a large number of cell culture and animal experiments have proved that tea and its extracts have anti-cancer and anti-cancer effects. Some epidemiological findings also suggest that tea drinking is related to the low incidence of certain human tumors. With the deepening of research work, some achievements have also been made in exploring the anti-cancer and anticancer mechanisms of tea. Now some of the relevant literature for a review. 1 Pre-block carcinogens into carcinogens Nitrosamines are strong carcinogens, nitrites and amines are directly involved in the synthesis of strong carcinogens precursors. Green tea and its extracts can effectively block the formation of nitrosamines in vitro and in vivo. Stich et al. Added tea and nitrite to salty tea