为了确定胱天蛋白酶-3在SLNT诱导的细胞凋亡中的作用,使用半胱天冬酶-3抑制剂(Ac-DEVD-CHO)。添加Ac-DEVD-CHO可显著预防SLNT诱导的细胞凋亡(从32.91±1.21%降至15.88±1.58%,而NC和Ac-DEVD-CHO组分别为6.45±0.96%,7.77±0.79%)[2] ]。经金丝桃素介导的PDT处理后,经zVAD-fmk(5.32%)或Ac-DEVD-CHO(7.43%)预处理的细胞凋亡率明显下降[3]。值得注意的是,10μmol/ L Ac-DEVD-CHO部分阻断了SIN诱导的细胞凋亡的作用并减少了凋亡细胞核的数量。 SIN的这些作用被胱天蛋白酶-3抑制剂Ac-DEVD-CHO阻断。喜树碱(4μM)是一种阳性对照,可增加caspase-3活性,这也被Ac-DEVD-CHO阻断[4]。
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[2]. Jinglin Wang, et al. A polysaccharide from Lentinus edodes inhibits human colon cancer cell proliferation and suppresses tumor growth in athymic nude mice. Oncotarget. 2017 Jan 3; 8(1): 610-623.
[3]. Junping Zhang, et al. Hypericin-mediated photodynamic therapy induces apoptosis of myoloma SP2/0 cells depended on caspase activity in vitro. Cancer Cell Int. 2015; 15: 58
[4]. Long-gang He, et al. Sinomenine induces apoptosis in RAW 264.7 cell-derived osteoclasts in vitro via caspase-3 activation. Acta Pharmacol Sin. 2014 Feb; 35(2): 203-210.
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