1. Expression of Osteopontin and Cyclooxygenase-2 in relation to cellular proliferation, in non-tumor colonic mucosa, colonic adenomas and colon adenocarcinoma
- Author
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Paola Andrea Lecompte Osorio, Inés Benedetti Padrón, and Lía Barrios García
- Subjects
medicine.medical_specialty ,Medicine (General) ,Colorectal cancer ,Gastroenterology ,R5-920 ,Osteopontina ,Internal medicine ,Medicine ,Cáncer colorrectal ,Osteopontin ,Cyclooxygenase-2 ,Ciclooxigenasa-2 ,biology ,business.industry ,Cancer ,General Medicine ,medicine.disease ,digestive system diseases ,Colonic mucosa ,biology.protein ,Adenocarcinoma ,Immunohistochemistry ,Colon adenocarcinoma ,Cyclooxygenase ,business - Abstract
espanolIntroduccion: se ha postulado la participacion de Ciclooxigenasa-2 (COX-2) y Osteopontina en el desarrollo del cancer de colon, las cuales juegan un papel importante en la progresion tumoral y podrian ser biomarcadores de pronostico, pero su papel sigue siendo controvertido. Objetivo: determinar y comparar la expresion de Osteopontina y COX-2 en mucosa colonica no tumoral, adenomas colonicos y adenocarcinoma de colon, en relacion con el indice de proliferacion celular. Metodos: se determino y comparo la expresion inmunohistoquimica de COX-2, Osteopontina y Ki-67 en tejido incluido en parafina de mucosa colonica no-tumoral, adenomas colonicos y adenocarcinomas de colon. Resultados: se estudiaron 65 casos: 19 mucosas colonicas no-tumorales, 13 adenomas y 33 adenocarcinomas. Hubo sobreexpresion de Ki-67 en celulas displasicas y tumorales. Se encontro expresion positiva para COX-2 en adenomas (30.7%) y adenocarcinomas (27.3%), sin diferencia significativa entre mucosa colonica no-tumoral, adenomas y adenocarcinomas (p=0.888). Osteopontina mostro positividad mas frecuente en adenocarcinomas (72.7%) y adenomas (84.6%) que en mucosa no-tumoral (10.5%), (p= EnglishIntroduction: the participation of Cyclooxygenase-2 (COX-2) and Osteopontin has been postulated in the development of colon cancer, which play an important role in the progression and could be biomarkers for its prognosis, but their role remains controversial. Objective: to determine and to compare the expression of Osteopontin and COX-2 in non-tumor colonic mucosa, colonic adenomas and colon adenocarcinoma, in relation to the cell proliferation index. Methods: the immunohistochemical expression of COX-2, Osteopontin and Ki-67 in formalin fixed paraffin embedded tissue of non-tumor colonic mucosa, colonic adenomas and colon adenocarcinoma were determined and compared. Results: were included 65 cases: 19 of non-tumor colonic mucosa, 13 colonic adenomas and 33 colon adenocarcinomas. There was increased expression of Ki-67 in dysplastic and tumor cells. There was positive expression for COX-2 in adenomas (30.7%) and adenocarcinomas (27.3%), without significant difference between nontumor colonic mucosa, adenomas and adenocarcinoma (p = 0.888). Osteopontin showed more frequent positivity in adenocarcinomas (72.7%) and adenomas (84.6%) than in non-tumor mucosa (10.5%), (p =
- Published
- 2021