颊癌中肿瘤转移抑制基因nm23mRNA的表达

通过Ｎｏｒｔｈｅｒｎ斑点杂交技术研究５２例颊癌及相关组织中肿瘤转移抑制基因ｎｍ３２－Ｈ１和ｎｍ２３－Ｈ２ｍＲＮＡ的表达。结果发现：颊癌组织中ｎｍ２３－Ｈ１和ｎｍ２３Ｈ２ｍＲＮＡ表达比正常颊粘膜、白斑、癌旁粘膜均有不同程度增高，颊癌有转移组中ｎｍ２３－Ｈ１ｍＲＮＡ表达比无转移组明显降低，转移灶中ｎｍ２３－Ｈ１ｍＲＮＡ的表达更低（Ｐ〈０．０５），ｎｍ２３－Ｈ１ｍＲＮＡ经无转移组明显降低，转移灶中ｎｍ２

mRNA expression of metastasis-suppressor gene nm23 in carcinoma of buccal mucosa I. Northern blotting study]

In this study the authors detected both nm23-H1 and nm23-H2 mRNA levels in 52 tissues samples of patients with carcinoma of buccal mucosa (CBM) by Northern blotting method. The expression levels of both nm23-H1 and nm23-H2 mRNA in CBM were higher than those in normal buccal mucosa, leukoplakia, adjacent nontumorous mucosa, and lymph nodes with or without metastasis. The nm23-H1 mRNA expression levels in CBM with lymph nodes metastases were lower than those in CBM without metastasis, and were lower in metastatic lympho nodes (P < 0.05). Of the 11 cases with metastases, 9 cases (81.8%) showed low expression of nm23-H1 mRNA, of 19 cases without metastasis, 15 cases (78.9%) were high expression. No significance of nm23-H2 mRNA expression levels were found between CBM with and CBM without metastasis (P > 0.05). The expression of nm23-H1 and nm23-H2 mRNA showed no significant correlation with each clinical-pathological parameter examed. The result suggested that the expression of nm23-H1 mRNA significantly correlated inversely with lymph node metastasis in CBM, while the expression of nm23-H2 mRNA not. nm23 mRNA expression levels can provide a valuable predictor of lymph node metastases in CBM.