TY  - JOUR
T1  - Bcl-2 expression in colorectal carcinoma and its correlation with clinicopathological parameters
A1  - Meena Bhardwaj
A1  - Kavita Mardi
A1  - Vijay Kaushal
A1  - Manika Sharma
A1  - Manju Rao
JF  - Clinical Cancer Investigation Journal
JO  - Clin Cancer Investig J
SN  - 2278-0513
Y1  - 2020
VL  - 9
IS  - 5
DO  - 10.4103/ccij.ccij_51_17
SP  - 182
EP  - 185
N2  - 
Background: Bcl-2 gene is a 26-kD protein that blocks apoptosis and inhibits programmed cell death. Its mutation is frequently detected genetic alteration, in human cancers. Its expression can easily be detected by immunohistochemistry (IHC). Objective: The objective was to estimate the frequency of Bcl-2 expression in colorectal carcinoma and its correlation with clinicopathologic parameters. Materials and Methods: The overexpression of Bcl-2 was studied in 112 paraffin-preserved colorectal carcinoma samples using E-17 clone antibody; Biogenex. The number of cells stained was scored semiquantitatively as none (no immunoreactive cells detectable), weak (1+, 50%). All tumors showing Bcl-2 immunoreactivity (at least +) were considered positive. The correlation between Bcl-2 protein expression and clinicopathological parameters was evaluated using Chi-square analysis. Results: Bcl-2 staining was positive in 45 of 112 cases. Of these, 15 cases were weak positive (score 1), 17 cases were moderately positive (score 2), and 13 cases were intensely positive (score 3) for Bcl-2 protein expression. Sixty-seven cases were negative for Bcl-2 staining (score 0). There was statistically significant correlation between Bcl-2 staining and sex (49% of females expressed Bcl-2 in tumors; P = −0.04), pathological type (mucinous vs. nonmucinous; P = −0.02), and tumor stage (P = −0.04). There was no significant correlation between Bcl-2 staining and age (P = −0.38), site of tumor (left colon vs. right colon; P = −0.13), pathological differentiation (P = −0.73), and between Bcl-2 scoring and tumor differentiation (P = −0.91). Conclusion: Bcl-2 protein seems to play an important role in the carcinogenesis of colorectal cancer. Considering the acceptable reliability and feasibility of IHC method for the detection of Bcl-2 immunoreactivity, this technique may be expected to serve as an important diagnostic and prognostic marker in colorectal carcinoma.

UR  - https://ccij-online.org/article/bcl-2-expression-in-colorectal-carcinoma-and-its-correlation-with-clinicopathological-parameters-860
ER  -