effect on PfMCA-2. One of these analogs, SS-5, specifically inhibited the activity and expression of PfMCA-2. The activities of some other known malarial proteases (falcipains, plasmepsins and vivapain), and human cathepsins-B, D and L, and caspase-3 and -7 were not inhibited by SS-5. SS-5 blocked the development of P. falciparum in vitro (IC50 1 µM) and caused prominent morphological distortions. Incubation
元
蛋白酶是在apicomplexan中发现的新型半胱
氨酸
蛋白酶,其功能尚不清楚。我们对恶性疟原虫metacaspase-2(P
FMa href=https://www.molaid.com/MS_25519 target="_blank">MCA-2)的早期研究表明,caspase
抑制剂Z-FA-
FMK有效抑制P
FMa href=https://www.molaid.com/MS_25519 target="_blank">MCA-2的活性和表达,并通过凋亡样作用显着阻断了体外寄生虫发育周期的进程。寄生虫死亡。在这些发现的基础上,我们合成了一组基于Z-FA-
FMK的
哌啶酸酰胺结构的新型
抑制剂,并研究了它们对P
FMa href=https://www.molaid.com/MS_25519 target="_blank">MCA-2的作用。这些类似物之一SS-5特异性抑制P
FMa href=https://www.molaid.com/MS_25519 target="_blank">MCA-2的活性和表达。SS-5并未抑制其他一些已知的疟疾
蛋白酶(FAlcipains,plasmepsins和vivapain)以及人
组织蛋白酶B,D和L以及caspase-3和-7的活性。SS-5阻断了恶性疟原虫的体外发育(IC50 1 µM),并引起了明显的形态学变形。与SS-5的孵育导致持续的寄生虫氧化应激,伴随着线粒体电位的去极化和细胞内Ca2