Caspase-3 expression in human gastric carcinoma and its clinical significance

Oncology
Naoki IsobeMasayuki Imamura

Abstract

Caspase-3 is one of the most important molecules in the apoptosis cascade, and the relationship between caspase-3 expression and prognosis has been reported in many types of malignancies. However, the involvement of caspase-3 in human gastric carcinoma is not fully understood. We evaluated caspase-3 expression in human gastric carcinoma to clarify the clinicopathological importance and investigated the apoptosis avoidance mechanism by an immunohistological method. Specimens from 151 patients who underwent gastrectomy at the Department of Surgery and Surgical Basic Science of Kyoto University Hospital were investigated. Caspase-3 expression in cancer cells was evaluated by comparing its expression in the germinal center of the lymphoid follicle, and was quantified as the caspase-3 expression index (C3EI). C3EI was compared with the expression of Bcl-2 and the TdT-mediated dUTP biotin nick-end labeling (TUNEL) in 80 randomly selected cases. Actual activation of caspase-3 was determined by immunohistochemistry using monoclonal antibody that recognizes only activated caspase-3. C3EI correlated significantly with lymph node metastasis (negative 105.5-78.7, positive 153.8 +/- 66.1 p = 0.001) and the lower C3EI group had a better prog...Continue Reading

Citations

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