[Immunohistochemical study of the predictive value of oncoproteins p53, HER-2 and c-myc during radiotherapy for squamous cell carcinoma of the cervix].

Out of 80 patients with squamous cell cervical carcinoma (stage II-III), p53 expression was observed in 30% of tumors prior to treatment and 49% in the course of radiotherapy. A correlation between degree of p53 expression before treatment, on the one hand, and overall and recurrence-free survival, on the other, was identified: high expression of mutated gene-suppressor p53 was 53% while for absence or low expression, it rose to 67% (p=0.03). For overexpression, 20-month survival was 65%; absence--81% (p=0.01). Hence, p53 expression may be used as a predictive factor in radiotherapy for cervical carcinoma. No correlation was found between p53 expression, on the one hand, and such basal clinico-morphological parameters as stage, morphological pattern and tumor cell differentiation, on the other. HER2(3t) overexpression occurred in 2 (2.5%) which seems to point to its insignificant role in squamous cell cervical carcinoma. There was no relationship between c-myc expression and long-term results.