ГЕНДЕРНЫЕ РАЗЛИЧИЯ В ТКАНЕВОМ КАСКАДЕ АКТИВАЦИИ ПЛАЗМИНОГЕНА И PAI-1 ПРИ ПЛОСКОКЛЕТОЧНОМ РАКЕ ПИЩЕВОДА

Aim: comparative analysis of uPA-Ag, uPA-act, tPA-Ag, tPA-act, PAI-1-Ag and PAI-1-act in tissues of esophageal squamous cell carcinoma (ESCC) in men (M) and women (W) to clarify some pathogenesis issues. Material and methods. Tumor tissue of ESCC and its perifocal area (19 M and 8 menopausal W aged 38 - 72 years, st II, G2, T2-3N0-1M0-1) were studied by ELISA using standard test kits. Results. ESCC tissue of M showed an increase in both uPA types from the resection line (RL), while in W only uPA-act was increased. tPA-Ag was decreased in tumors of W, tPA-act - in tumors of all patients. Levels of both PAI-1 types were higher in ESCC of M than in W. In M, tPA-Ag in perifocal area was lower than in RL, while in W, on the contrary, it was higher. tPA-Ag/tPA-act coefficient in M tumors was 5.7 times higher than in W; in perifocal area it was reduced in all patients, being at the same time in M lower than in W. Both PAI-1 types were increased in malignant tissues of all patients, prevailing in M tumors, and PAI-1-Ag in peritumoral tissue was higher in M than in W. Conclusions. Significant gender differences were found in expression of uPA, tPA and PAI-1 in tissues of esophageal squamous cell carcinoma. Presence of tumor-associated uPA, PAI-1 and tPA in men and uPA and PAI-1 in women is possible in tumor tissue of esophageal squamous cell carcinoma and its perifocal area. Determination of plasminogen regulation system in tissues of esophageal squamous cell carcinoma can be used for the selection and individualization of postoperative treatments.