Lack of estrogen receptors expression in malignant and pre-malignant colorectal lesions in Egyptian patients

Abstract

Background: incidence of Colorectal cancer (CRC) is increasing globally. In Egypt, CRC ranks the sixth most common cancer in males and the fifth in females. Aim: To assess the expression of estrogen receptors (alpha and beta) in pre-malignant (adenomatous polyps and IBD), malignant colorectal lesions and normal colonic mucosa in group of Egyptian patients. Methods: This prospective study was done on 45 patients presenting with colonic symptoms, patients were divided into four groups; 15 CRC patients, 10 patients with adenomatous polyps, 10 IBD patients and 10 patients in the control group. Patients subjected to: Stool analysis, FOBT, CBC, CEA, Abdominal ultrasound & colonoscopy and biopsy (number = 80), Pathological, immunohistochemistry and RT- PCR quantification of ERα and ERβ were done. Results: Mean age: 39.2 (12 - 73), gender: M/F: 28/17. Bleeding per rectum was the commonest presentation; 29/45 (64.4%). CEA was significantly elevated in the CRC group compared with other studied groups (1692 mg/L vs. 4.0, 4.0 and 4.4 mg/L). Ultrasonography of the studied patients showed that metastatic CRC: 3/15 (20%); Colonic wall thickening: 5/15 (33.3%), 1/10 showed colonic polypoidal lesions in adenomatous polyps groups, in IBD group: 4/10 (40%) showed colonic and ileocecal thicknening. All the studied patients showed negative results for estrogen receptors (alpha and beta) by the use of immunohistochemistry staining and RT-PCR technique. Conclusion: Role of estrogen receptors in the colonic mucosa, precancerous and colorectal cancer is doubtful, contradictory results with some literature data could be due to racial and genetic difference in the studied population.

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Said, M. , Khairy, M. , El-Hendawy, A. , Khalf, O. , Abdelbary, M. , Saadi, Y. and Yosry, A. (2013) Lack of estrogen receptors expression in malignant and pre-malignant colorectal lesions in Egyptian patients. Open Journal of Gastroenterology, 3, 155-163. doi: 10.4236/ojgas.2013.32026.

Conflicts of Interest

The authors declare no conflicts of interest.

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