Das Laxmidhar, Vinayak Manjula
Biochemistry and Molecular Biology Laboratory, Department of Zoology (Center for Advanced Study), Banaras Hindu University , Varanasi , India.
Leuk Lymphoma. 2014 Nov;55(11):2627-36. doi: 10.3109/10428194.2014.889824. Epub 2014 Mar 10.
Tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) are typical multifunctional proinflammatory cytokines involved actively in the regulation of immunity, hematopoiesis, inflammation and carcinogenesis. Coordinated regulation of these cytokines could be required for effective regulation of early phase inflammation and cancer progression. The present work was aimed to analyze the anti-carcinogenic action of curcumin on the expression of TNF-α and IL-6 even after withdrawal of treatment. Up-regulated expressions of TNF-α and IL-6 in terms of mRNA and protein levels in lymphoma bearing mice were significantly down-regulated by curcumin as compared to normal. Electrophoretic mobility shift assay (EMSA) results revealed that curcumin reduced binding of nuclear protein with ETS and NF-κB binding elements of TNF-α and IL-6 promoters, respectively. The anti-carcinogenic effect of curcumin against lymphoma progression has been reported previously. In continuation, the present study suggests that the long-term effect of curcumin may contribute to attenuate cancer progression via the down-regulation of TNF-α and IL-6 modulated by E26 transformation-specific protein (ETS) and nuclear factor-κB (NF-κB), respectively.
肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)是典型的多功能促炎细胞因子,积极参与免疫、造血、炎症和致癌作用的调节。有效调节早期炎症和癌症进展可能需要这些细胞因子的协同调节。目前的工作旨在分析姜黄素即使在停止治疗后对TNF-α和IL-6表达的抗癌作用。与正常情况相比,姜黄素显著下调了荷瘤小鼠中TNF-α和IL-6在mRNA和蛋白质水平上的上调表达。电泳迁移率变动分析(EMSA)结果显示,姜黄素分别降低了核蛋白与TNF-α和IL-6启动子的ETS和NF-κB结合元件的结合。姜黄素对淋巴瘤进展的抗癌作用此前已有报道。继续来看,本研究表明,姜黄素的长期作用可能分别通过下调由E26转化特异性蛋白(ETS)和核因子-κB(NF-κB)调节的TNF-α和IL-6来促进癌症进展的减弱。