艾拉莫德对脂多糖激活大鼠肺泡巨噬细胞系TNFα产生及NF-κB活性的抑制作用

目的研究非甾体抗炎药艾拉莫德(T-614)对脂多糖(LPS)刺激的大鼠肺泡巨噬细胞系(NR8383)前炎症反应因子TNFα基因表达、蛋白合成的影响及其对核因子κB(NF-κB)的作用。方法体外培养NR8383经T-614(13.4，26.7及53.4 μmol·L^-1)处理，LPS刺激后应用酶联免疫吸附法(ELISA)检测细胞上清液中TNFα的水平，半定量逆转录聚合酶链式反应(RT-PCR)检测TNFα mRNA水平，ELISA法检测NF-κB的活性。结果T-614对LPS诱导的NR8383细胞TNFα mRNA水平和蛋白水平的上调有显著抑制作用，对NF-κB的转录活性也有抑制作用。结论 T-614可能通过抑制LPS诱导的NR8383的NF-κB活性而降低TNFα的产生。

Inhibitory effect of iguratimod on TNFα production and NF-κB activity in LPS-stimulated rat alveolar macrophage cell line

AIM: To investigate the effect of iguratimod (T-614), a non-steroidal anti-inflammatory drug, on TNFalpha mRNA expression and TNFalpha production, and on the activity of nuclear factor-kappaB (NF-kappaB) in the rat alveolar macrophage cell line (NR8383) activated by LPS. METHODS: NR8383 cells were pretreated with T-614 (13.4, 26.7, 53.4 micromol x L(-1)), then were stimulated with LPS. The production of TNFalpha in the supernatant of NR8383 was assayed by enzyme-linked immunosorbent assay (ELISA). The TNFalpha mRNA level was determined by a semi-quantitative PCR assay. Assessment of the NF-kappaB DNA binding activity was performed by an ELISA kit. RESULTS: T-614 inhibited LPS-stimulated mRNA expression and production of TNFalpha in a concentration-dependent manner, as well as the activity of NF-kappaB. The IC50 value of effect of T-614 on TNFalpha level was 26.2 micromol x L(-1). CONCLUSION: The inhibitory effect of T-614 on the production of TNFalpha in LPS-stimulated NR8383 cells may be mediated by suppression of NF-kappaB activity.