Современная онкология (Mar 2016)
Insulin-like growth factors in patients with ovarian tumors (results of own research)
Abstract
In experimental models it was shown that the family of insulin-like growth factors (IGF), the main representative of which is IGF-1 exerts mitogenic, antiapoptotic and angiogenic activity. It is known that IGF-signaling pathway is involved in the activation cascade of the mitogen-activated protein kinases, resulting in the blocking of apoptosis. Clinical studies confirm the need for the involvement of IGF signaling pathway in the development and progression of ovarian cancer (OC).Subjects and methods. The study included 44 patients with ovarian cancer, 7 patients with borderline and 14 benign ovarian tumors. The ELISA analysis determined the content of insulin-like growth factors type 1 and 2 in tumor tissue and serum of patients with neoplasm of the ovary.Results. In the tissue of ovarian cancer content of IGF-1 were significantly lower than in the tissue of benign tumors. Serum levels of IGF-1 and IGF-2 correlated negatively with the prevalence of OC. Found direct correlation between levels of IGF-1 and IGF-2 in ovarian cancer tissue, and poor direct correlation between serum levels of IGF-1 and IGF-2. The median follow-up period was 14 months and the median time without recurrence was 13.5 months. It is established that two-year disease-free survival is reduced by 40% when low serum levels of IGF-I, and 30% at low levels of IGF-2. In patients with residual tumor size less than 1 cm with high serum levels of IGF-1 (87 ng/ml) two - year disease-free survival was 66.2%, and at low levels of IGF-1 - 25% (p=0.016).Conclusions. The levels of IGF-1 and IGF-2 in tumor tissue and serum in patients with ovarian cancer were decreased in the tumor process. Elevated levels of IGF-I can be considered as a factor of favorable prognosis in patients with ovarian cancer who underwent cytoreductive surgery with residual tumor of less than 1 cm.
