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根据美国纽约消息,明尼苏达大学的遗传学家说,人染色体中51个脆性位点的发现为检出某些类型癌症易感性的血液试验打下基础。相当于染色体断裂点的位点中有20个位点与人类恶性肿瘤有关。而且,上述发现提示在染色体断裂和重组中,可能在细胞水平上缺乏叶酸。Jorge J Yunis在记者招待会上说,虽然没有直接证实复合维生素B有防癌作用,但是向有癌症家族史或接触致癌物的人推荐富含叶酸的食物,可能是无害的。 Yunis在缺乏叶酸和胸腺嘧啶脱氧核苷(DNA碱基胸腺嘧啶前体)的培养基中培养
According to New York City, USA, geneticists at the University of Minnesota said that the discovery of 51 fragile sites in the human chromosome laid the foundation for blood tests to detect certain types of cancer susceptibility. There are 20 sites in the site that correspond to chromosome breakpoints that are related to human malignancy. Moreover, the above findings suggest that there may be a lack of folic acid at the cellular level in chromosome breakage and recombination. Jorge J Yunis said at the press conference that although there is no direct confirmation of the anti-cancer effect of vitamin B, it is probably harmless to recommend folic acid-rich foods to people with a family history of cancer or exposure to carcinogens. Yunis cultured in a medium lacking folic acid and thymidine (DNA base thymidine precursor)