近年来,一些学者对于吸烟与肺癌发生的关系提出异议,认为它们之间可能无因果关系。已知香烟烟雾中有多种诱变剂和致癌剂,并可导致试验动物发生肿瘤。分子流行病学研究表明,抑癌基因(如 p53)和癌基因(ras)的点突变,无论对于诱发的肿瘤类型还 In recent years, some scholars have raised objections to the relationship between smoking and the occurrence of lung cancer, believing that there may be no causal relationship between them. Cigarette smoke is known to have a variety of mutagens and carcinogens and can cause tumors in test animals. Molecular epidemiological studies have shown that point mutations in tumor suppressor genes (such as p53) and oncogenes (ras), regardless of the type of tumor induced