A series of thirteen triarylpyrazole analogs were investigated as inhibitors of lipopolysaccharide (LPS)-induced prostaglandin E2 (PGE2) and nitric oxide (NO) production in RAW 264.7 macrophages. The target compounds 1a–m have first been assessed for cytotoxicity against RAW 264.7 macrophages to determine their non-cytotoxic concentration(s) for anti-inflammatory testing to make sure that the inhibition of PGE2 and NO production would not be caused by cytotoxicity. It was found that compounds 1f and 1m were the most potent PGE2 inhibitors with IC50 values of 7.1 and 1.1 μM, respectively. In addition, these compounds also showed inhibitory effects of 11.6% and 37.19% on LPS-induced NO production, respectively. The western blots analysis of COX-2 and iNOS showed that the PGE2 and NO inhibitory effect of compound 1m are attributed to inhibition of COX-2 and iNOS protein expression through inactivation of p38.
一系列十三个三芳基吡唑类似物被研究作为抑制RAW 264.7巨噬细胞中脂多糖(LPS)诱导的前列腺素E2(PGE2)和一氧化氮(NO)产生的抑制剂。首先评估了目标化合物1a-m对RAW 264.7巨噬细胞的细胞毒性,以确定它们的非细胞毒浓度,用于抗炎测试,以确保PGE2和NO产生的抑制不是由细胞毒性引起的。发现化合物1f和1m是最有效的PGE2抑制剂,IC50值分别为7.1和1.1μM。此外,这些化合物还分别显示对LPS诱导的NO产生的抑制效果为11.6%和37.19%。COX-2和iNOS的免疫印迹分析显示,化合物1m的PGE2和NO抑制效应归因于通过抑制p38使COX-2和iNOS蛋白表达失活。