a friedelane-type triterpenoid isolated from the genus Triperygium, possesses antitumor, anti-inflammatory, and immunosuppressive activities. A total of 42 celastrol derivatives (1a–1t, 2a–2l, and 3a–3j) were synthesized and evaluated for their immunosuppressive activities. Compounds 2a–2e showed immunosuppressive effects, with IC50 values ranging from 25 to 83 nM, and weak cytotoxicity (CC50 > 1 μM)
南蛇藤醇,一木栓型三
萜类化合物从属植物中分离雷公藤,具有抗肿瘤,抗炎,免疫抑制和活动。总共合成了 42 种 Celastrol 衍
生物(1a – 1t、2a – 2l和3a – 3j)并评估了它们的免疫抑制活性。化合物2a – 2e显示出免疫抑制作用,IC 50值范围为 25 至 83 nM,细胞毒性较弱(CC 50 > 1 μM)。化合物2a选择性指数值比 celastrol 高 31 倍,被选为先导化合物。进一步的研究表明,2a通过 Lck 和 ZAP-70 介导的信号通路诱导细胞凋亡和抑制细胞因子分泌来发挥其免疫抑制作用。