核因子-κ B p65反义寡核苷酸对大鼠肝星状细胞转化生长因子β1及细胞间黏附分子1表达的影响

目的 探讨核因子-κB p65反义寡核苷酸(NF-κB 065 ASODN)对大鼠肝星状细胞HSC炎症因子转化生长因子β 1(TGF β 1)及细胞间黏附分子1(ICAM-1)表达的影响. 方法Ⅳ型胶原酶消化密度梯度离心法分离培养大鼠HSC;人工合成NF-κB p65 ASODN并行全程硫代磷酸化修饰;观察脂质体介导的不同浓度的NF-κB p65 ASODN(0.001、0.010、0.100、1.000μmol/L)对肿瘤坏死因子(TNF)α刺激HSC产生TGF β1及ICAM-1 mRNA和蛋白质表达的影响,蛋白凝胶电脉迁移率变动分析法检测NF-κB p65 ASODN对TNF α刺激HSCNF-κB的活性影响.结果 TNF α刺激HSC后,NF-κB活性和TGF β1、ICAM-1的表达明显增强;应用NF-κB p65 ASODN(0.001～1.000 μmol/L)作用后,NF-κB活性明显减弱,且呈剂量依赖性,灰度值分别为16 070±223,15 715±199,14 999±224,14 447±228,各组比较,P值均<0.05.同时TGF β1、ICAM-1的mRNA及蛋白质表达明显减少,亦呈剂量依赖性,P值均<0.05.结论 NF-κB p65 ASODN可特异性降低HSC的NF-κB的活性,明显抑制TGF β1、ICAM-1的表达,为NF-κB p65 ASODN治疗肝纤维化提供了理论依据.

Effects of nuclear factor-kappa B p65 ASODN on transforming growth beta-I and intercellular adhesion molecule-1 of rat hepatic stellate cells

Objective Objectives To study the effects of nuclear factor (NF)-kappa B p65 ASODN on transforming growth factor beta-1 (TGF beta 1) and intercellular adhesion molecule-1 (ICAM-1 ) of rathepatic stellate cells (HSC) and the mechanisms ofNF-kappa B p65 ASODN in treating liver fibrosis. Methods Type Ⅳ collagen enzyme digestion and density centrifugation methods were used to separate rat hepatic stellate cells. NF-kappa B p65 ASODN was manually synthesized and completely phosphorothioate-modified.The changes of TGF beta 1 and ICAM-1 mRNA were detected by RT-PCR and albumen of TGF beta 1 and ICAM-1 were detected by ELISA. The changes of NF-kappa B activity were determined by ELISA. Results NF-kappa B activity and the expressions oflCAM-1 and TGF beta 1 increased after the HSC were treated by TNF alpha, NF-kappa B activity weakened after being treated with NF-kappa B p65 ASODN (0.001-1.000 μool/L),P < 0.05 in a dose dependent manner. Transferring NF-kappa B p65 ASODN (0.001-1.000 μmol/L) also weakened the expression of ICAM-1 and TGF beta 1 mRNA and the protein induced by TNF alpha in HSC.It was also in a dose dependent manner, P < 0.05. Conclusions After transferring NF-kappa B p65 ASODN into HSC, their NF-kappa B activity decreased, and their mRNA and protein expressions of ICAM-1 and TGF beta 1 also decreased. This may serve as a new way in treating hepatic fibrosis.