p27、C-myc蛋白在肺鳞癌、腺癌中的表达

目的 研究p27、C-myc蛋白在肺鳞癌、腺癌中的表达与肺鳞癌、腺癌临床病理特征的关系,及二者的相关性.方法 应用免疫组织化学方法检测35例手术切除肺鳞癌、腺癌组织中p27及C-myc蛋白的表达,与10例癌旁正常肺组织比较.结果 35例肺鳞癌、腺癌组织p27蛋白阳性率为17.1%(6/35),癌旁正常肺组织的阳性率为90.0%(9/10),两者比较差异有统计学意义(P<0.05);在高-中、低分化肿瘤中的阳性率比较差异有统计学意义(P=0.005);p27蛋白阳性率在不同肿瘤大小、组织学类型及有无淋巴结转移中比较差异无统计学意义(P>0.05).35例肺鳞癌、腺癌组织C-myc蛋白阳性率为85.7%(30/35),癌旁正常肺组织无表达,两者比较差异有统计学意义(P<0.05).C-myc蛋白阳性率在有无淋巴结转移中比较差异有统计学意义(P=0.013);在不同肿瘤大小、分化程度及组织学类型中比较差异均无统计学意义(P>0.05);在肺鳞癌、腺癌中p27蛋白与C-myc蛋白的表达呈负相关.结论 p27蛋白在正常肺组织中表达阳性,在肺鳞癌、腺癌组织中表达明显降低,其表达与肿瘤的分化程度相关,随肿瘤分化变差而降低.C-myc蛋白在正常肺组织中无表达,在鳞癌、腺癌组织中表达明显,在淋巴结转移的肿瘤表达明显升高.提示C-myc蛋白可作为评价肿瘤预后的指标之一.

Abstract：

Objective To investigate the clinical pathology characteristics of the p27 and C-myc protein expression in lung squamous cell carcinoma and adenecarcinoma as well as the correlation between the expressions of them. Method The expressions of p27 and C-mye protein in tumor tissue of 35 cases excised during pulmonectomy for lung squamous cell carcinoma and adenocarcinoma patients were examined using immunochemical method,and compared with 10 cases of normal lung tissue. Results The total positive rate of p27 protein was 17.1%(6/35 ) in 35 eases of tumor tissue, but 90.0%(9/10) in normal lung tissue, and there was significant difference (P< 0.05 ). Between high-moderate and low differentiated tissue,the positive rate had significant difference (P = 0.005). There was no significant difference of p27 protein expression in patients with different tumor size and histology types, as well as with or without lymph nodes metastasis (P > 0.05 ). The total positive rate of C-myc protein was 85.7% (30/35) in tumor tissue, but no expression existed in normal lung tissue (P < 0.05). There was significant difference of C-myc expressions between the tissue with and without lymph nodes metastasis (P =0.013),but there was no significant difference in various tumor size, differentiated degree, as well as histology type(P> 0.05). The expression of p27 and C-myc in lung squamous cell carcinoma and adenecareinoma showed negative correlation.Conclusions The expression of p27 protein is positive in normal lung tissue, but shows outstanding decrease in lung squamous cell carcinoma and adenocarcinoma tissue. Its expression correlates with the differentiated degree. The expression of C-myc is negative in normal lung tissue but shows significant increase in lung squamous cell carcinoma and adenocareinoma tissue and its expression correlates with lymph nodes metastasis. C-myc may be a valuable marker in evaluating prognosis.

Expression of p27, C-myc protein in lung squamous cell carcinoma and adenocarcinoma

Objective To investigate the clinical pathology characteristics of the p27 and C-myc protein expression in lung squamous cell carcinoma and adenecarcinoma as well as the correlation between the expressions of them. Method The expressions of p27 and C-mye protein in tumor tissue of 35 cases excised during pulmonectomy for lung squamous cell carcinoma and adenocarcinoma patients were examined using immunochemical method,and compared with 10 cases of normal lung tissue. Results The total positive rate of p27 protein was 17.1%(6/35 ) in 35 eases of tumor tissue, but 90.0%(9/10) in normal lung tissue, and there was significant difference (P< 0.05 ). Between high-moderate and low differentiated tissue,the positive rate had significant difference (P = 0.005). There was no significant difference of p27 protein expression in patients with different tumor size and histology types, as well as with or without lymph nodes metastasis (P > 0.05 ). The total positive rate of C-myc protein was 85.7% (30/35) in tumor tissue, but no expression existed in normal lung tissue (P < 0.05). There was significant difference of C-myc expressions between the tissue with and without lymph nodes metastasis (P =0.013),but there was no significant difference in various tumor size, differentiated degree, as well as histology type(P> 0.05). The expression of p27 and C-myc in lung squamous cell carcinoma and adenecareinoma showed negative correlation.Conclusions The expression of p27 protein is positive in normal lung tissue, but shows outstanding decrease in lung squamous cell carcinoma and adenocarcinoma tissue. Its expression correlates with the differentiated degree. The expression of C-myc is negative in normal lung tissue but shows significant increase in lung squamous cell carcinoma and adenocareinoma tissue and its expression correlates with lymph nodes metastasis. C-myc may be a valuable marker in evaluating prognosis.