IMMUNOHISTOCHEMICAL STUDY OF THE EXPRESSION OF THE STEROID HORMONES ESTRADIOL AND PROGESTERONE, THE ENZYME CREATINO KINASE BB, THE ONCOGENES H-RAS, C-MYC AND C-ERBB2 AND TGFA IN SQUAMUS CELL CARCINOMAS OF THE LARYNX
Abstract
TO ASSESS A POSSIBLE GROWTH AND DIFFERENTIATION DEPENDENCE OF SQUAMUS CELL CARCINOMA OF THE LARYNX, THE EXPRESSION OF THE ENDOGENOUS SEX STEROID HORMONES, ESTRADIOL AND PROGESTERONE, THE ISOENZYME BB OF CREATINOKINASE, THE ONCOGENES H-RAS, C-MYC AND C- ERBB2 AND TGFA WERE IMMUNOHISTOCHEMICALLY STUDIED. IT WAS FOUNDTHAT THE TWO STEROID HORMONES, THE CREATINOKINASE BB, THE H-RAS, THE C-ERBB2 IN WELL DIFFERENTIATED CARCINOMAS AND THE TGFA WERE LOCALIZED IN THE CYTOPLASM. ON THE CONTRARY THE C-ERBB2 IN CARCINOMAS GRADE II AND III WAS LOCALIZED IN THECELL MEMBRANE. IN FEW CASES THERE WAS NUCLEAR LOCALIZATION OF THE C-MYC. WITH REGARD TO GRADING, THE GRADE II AND III CARCINOMAS APPEARED TO BE MORE POSITIVETHAN THE GRADE I CANCERS, WITH THE EXCEPTION OF TGFA. IT IS REMARKABLE THAT C-ERBB2 EXPRESSION WAS GREATER IN ER- POSITIVE AND PR-POSITIVE CASES. THE ONCOGENES H-RAS AND C-ERBB2 WERE ALSO DETECTED INTO CELLS EXHIBITING DYSPLASTIC ALTERATIONS. THIS STUDY SHOWS THAT THE IMMUNOHISTOCHEMICAL DE ...
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