Expression of Septin 2 and Her2/neu in Colorectal Cancer

Hala M El Hanbuli; Samar Ibrahim Ismail Amer; Heba A Ibrahim

doi:10.4103/jmau.jmau_38_21

Expression of Septin 2 and Her2/neu in Colorectal Cancer

J Microsc Ultrastruct. 2021 Nov 22;10(4):197-203. doi: 10.4103/jmau.jmau_38_21. eCollection 2022 Oct-Dec.

Authors

Hala M El Hanbuli¹, Samar Ibrahim Ismail Amer², Heba A Ibrahim²

Affiliations

¹ Department of Pathology, Faculty of Medicine, Fayoum University, Faiyum, Egypt.
² Department of Pathology, Cairo University, Giza, Egypt.

Abstract

Background: Colorectal cancer (CRC) is a common and lethal disease. Septin 2 belongs to the same class of GTPases as the RAS oncogenes influence the invasion and metastasis of many types of tumor cells. Furthermore, HER2/neu is involved in the tumor genesis and progression of various types of tumors. The role of both molecules is still questionable in CRC.

Aim: The aim of the study is to examine the expression of septin 2 and Her2/neu in patients with CRC.

Materials and methods: The study was conducted on 2 groups; the first group consisted of 70 paraffin blocks for CRC patients and the second group was formed of 24 blocks from patients diagnosed as colorectal adenoma. For each adenoma and carcinoma case, a section was immunohistochemically stained using antihuman SEPT2 polyclonal antibody. For each carcinoma case, another section was immunostained using monoclonal anti-HER2/neu. The results were statistically analyzed and compared with the collected clinicopathologic data of the cases.

Results: For the carcinoma patients, there was a significant association between SEPT2 staining intensity and histologic type (P = 0.001) and grade (P < 0.001), tumor T (P = 0.001) and N (P = 0.011) stages and the presence of lymphovascular invasion (P < 0.001) and a significant association between Her2/neu immunoreactivity scores (IRSs) and histologic grade (P = 0.048), tumor T (P < 0.001) and N (P = 0.019) stages and the presence of perineural (P = 0.004) and lymphovascular (P = 0.003) invasion. In colonic adenoma patients, there was a significant relation between septin 2 IRSs and the grade of dysplasia in the adenoma (P < 0.001) and significant relation with its expression in carcinoma group (P < 0.001).

Conclusion: A potential prognostic role of septin 2 and Her2/neu for patients with CRC is suggested as expression of both markers was associated with many important prognostic clinicopathologic variables in patients of CRC.

Keywords: Adenoma; Her2/neu; Septin 2; colorectal cancer.