抑癌基因p16,p21及p53在鼻咽癌的表达

目的：观察抑癌基因ｐ１６，ｐ２１及ｐ５３在鼻咽癌（ＮＰＣ）的表达，探讨其与ＮＰＣ的发生发展及预后的关系。方法：用免疫组化ＳＰ法检测了１１６例ＮＰＣ组织和１５例无瘤鼻咽（ＮＰ）组织的ｐ１６，ｐ２１及ｐ５３基因的表达情况。

The expression of suppressor gene p16,p21 and p53 in nasopharyngeal carcinoma

OBJECTIVE: To evaluate the roles of p16, p21 and p53 protein expression in nasopharyngeal carcinoma (NPC). METHOD: The SP immunohistochemical method was used to detect the expression of p16, p21 and p53 protein in 116 cases of NPC and 15 cases of non-tumour nasopharyngeal tissue. RESULT: 1. The positive expression rates of p16, p21 and p53 protein were 64.7%, 45.7% and 90.5% in NPC respectively. There were significant differences between NPC and non-tumour group (P < 0.05). 2. The expressive rate of p16 protein was 70.6% in non-keratinizing type, 44.8% in undifferentiated type (P < 0.05). 3. The positive expression of p21 was correlated with the expression of p16 and p53. CONCLUSION: Low expressions of p16 and p21 protein may play an important role in carcinogenesis of NPC, and that of p16 has some relation to cell differentiation of NPC. p16 protein may co-operate with p21 protein in development of NPC. p21 protein is probably not produced by stimulating wild-type p53 protein.