OVEREXPRESSIONS OF Ha-ras AND p53 PREDICT THE PROGNOSIS OF PATIENTS WITH NON-SMALL-CELL LUNG CARCINOMA

Objective: To understand the relationship between the expression of ras and p53 and histological types, degree of differentiation, TNM classification, stage, and patients' prognoses of non-small-cell lung cancer, we examined Ha-ras and p53 production in 143 non-small-cell lung carcinomas. Methods: One hundred and forty-three paraffin-embedded surgically resected specimens of primary non-small-cell lung carcinomas (57 squamous cell carcinomas, 63 acinar adenocarcinomas, 15 bronchio-loalveolar carcinomas, and 8 large-cell carcinomas) were stained by streptavidin-peroxidase immunohistochemical method using anti-Ha-ras monoclonal and anti-p53 monoclonal (DO-1) antibodies. Results: Ha-ras was found in 68% (87 of 143) of lung carcinomas. The positive rate of Ha-ras staining in well differentiated carcinoma was 89%,significantly higher than that in moderately differentiated carcinoma (66%, P