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Oncol Res. 2006;15(9):441-4.

Immunohistochemical detection of apoptotic markers in gastric cancer.

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  • 1The Cancer Biology Proteomics Group, Postgraduate Medical Institute of the University of Hull, UK.


Apoptosis proteins may play a role in prognosis and therapy response; however, they have not been fully investigated in gastric cancer. We aimed to assess the expression of proteins in the Bcl-2 family. Immunohistochemistry was employed to examine the expression of the antiapoptotic proteins Bcl-2 and Bcl-XL and the proapoptotic proteins Bad, Bak, Bax, Bid, Bim, and p53 in 21 cases of gastric cancer. Immunopositivity was observed in 12/21 (57%) cases for p53, 16/21 (76%) cases for Bcl-XL, and 5/21 (23%) cases for Bcl-2. For the proapoptotic members of the Bcl family, loss of protein expression was observed: Bid (14/21 cases; 66%), Bad (13/21 cases; 61%), Bax (12/21 cases; 57%), Bak (9/21 cases; 42%), and Bim (4/21 cases; 19%). This study identified apoptosis proteins that exhibit heterogeneous expression between primary gastric carcinomas.

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