Purpose To investigate the expression and the clinical significances of SEL1L and BCL-2 in 123 cases of diffuse large B cell lymphoma (DLBCL) and cell line SUDHL-4, LY-10. Methods Immunohistochemistry staining for SEL1L was performed in 123 DLBCL and 60 reactive lymphoid hyperplasia (RLH), and also BCL-2 protein in 123 DLBCL. Immunocytochemistry staining and Western blot analysis for SEL1L protein were used in SUDHL-4 and LY-10. Results The high expression rate of SEL1L was 69.9％ in 123 DLBCL, which was significantly higher than that in 60 RLH (25.0％ ). The expression of SEL1L protein in DLBCL was not related to clinic pathological parameters. The positive rate of BCL-2 was 83.7％ in123 DLBCL. The expression of BCL-2 protein was correlated with immunophenotyping, primary location, and Ann Arbor stage. The expression of SEL1L protein was positively correlated with that of BCL-2 protein in DLBCL (r=0.227, P＜0.05). SEL1L protein was also detected in SUDHL-4 and LY-10 cell lines. Conclusion The SEL1L protein may play an important role in the carcinogenesis of DLBCL, and may be associated with BCL-2.%目的 探讨SEL1L蛋白、BCL-2蛋白在弥漫大B细胞淋巴瘤(diffuse large B cell lymphoma, DLBCL)组织和细胞株 SUDHL-4、LY-10中的表达及意义.方法 采用免疫组化法检测123例DLBCL组织中SEL1L、BCL-2蛋白的表达及60例反应性淋巴组织增生(reactive lymphoid hyperplasia, RLH)组织中SEL1L蛋白的表达.应用免疫细胞化学及Western blot法检测 SEL1L蛋白在DLBCL细胞株SUDHL4及LY-10中的表达.结果 SEL1L蛋白在DLBCL中的高表达率明显高于RLH(69.9％ νs 25.0％ ,P＜0.05),其表达与各临床病理特征均无关.BCL-2蛋白在DLBCL中的阳性率为83.7％,与肿瘤原发位置、免疫表型及Ann Arbor分期有关(P＜0.05) ;SEL1L蛋白与BCL-2蛋白在DLBCL中的表达呈正相关(r=0.227,P＜ 0.05). SEL1L蛋白在SUDHL4及LY-10中均呈阳性.结论 SEL1L与BCL-2在DLBCL中均呈高表达,提示SEL1L在DLBCL的发生、发展中可能起重要作用,并可能与BCL-2表达产生协同作用.
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