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Fli-1 regulates multiple biological functions in different cancers particularly Ewing sarcoma and leukemias. There are controversial reports regarding function and prognostic significance of Fli-1 in epithelial cancer including gastric carcinoma (GC). No previous reports examined relationship between Fli-1 and BCL-2 in GC. This study aimed to investigate the expression of Fli-1 and BCL-2 in GC and expected the prognostic significance of their expression. Study was carried out on 88 gastric specimens (58 GC and 30 chronic gastritis cases). Immunohistochemical staining for Fli-1 and BCL-2 was done. There was significant lower Fli-1 and BCL-2 expression in GC than chronic gastritis. Advanced tumor stage showed significant relation with both low Fli-1 expression and negative BCL-2 expression. There was significant direct correlation between BCL-2 positivity and Fli-1 expression in GC. Cox-regression analysis showed that distant metastasis was the first independent factor affecting patients’ OS. Fli-1 could act as tumor-suppressor protein involved in GC carcinogenesis. In addition, both Fli-1 and BCL-2 may be used as good prognostic markers in GC. The direct correlation between BCL-2 and Fli-1 expression could potentiate Fli-1 and BCL-2 as therapeutic targets in GC, acting together to inhibit cellular proliferation.

journal of immunoassay and immunochemistry

Expression of Friend Leukemia Integration-1 (Fli-1) and the Apoptosis Regulator B Cell Lymphoma-2 (BCL-2) in Gastric Carcinoma; an Immunohistochemical Study