Expression of p27, C-myc protein in lung squamous cell carcinoma and adenocarcinoma / 中国医师进修杂志

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 ). 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). 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.