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Dioscin inhibits the growth of human osteosarcoma by inducing G2/M-phase arrest, apoptosis, and GSDME-dependent cell death in vitro and in vivo

Qiuyue Ding,Wenda Zhang,Cheng Cheng,Fengbo Mo,Lei Chen,Guangfu Peng,Xianyi Cai,Jinglong Wang,Shuhua Yang,Xianzhe Liu

Pyroptosis is a form of programmed cell death (PCD) that plays a vital role in immunity and diseases. Although it was recently reported that chemotherapy drugs can induce pyroptosis through caspase-3-dependent cleavage of gasdermin E (GSDME), the role of pyroptosis in osteosarcoma (OS) with dioscin is less understood. In this study, we explored the effects of dioscin on OS in vitro and in vivo and further elucidated the underlying molecular mechanisms and found that dioscin-triggered pyroptosis in GSDME-dependent cell death and that GSDME-N was generated by caspase-3. Furthermore, dioscin inhibited cancer cell growth by inducing G2/M arrest and apoptosis through the JNK/p38 pathway. In vivo, dioscin significantly inhibited OS proliferation. Taken together, our results demonstrate that dioscin can induce apoptosis through the JNK/p38 pathway and GSDME-dependent pyroptosis in OS, identifying it as a potential therapeutic drug for treatment of this disease. HIGHLIGHTS Dioscin triggers pyroptosis in osteosarcoma. Gasdermin E is a mediator of dioscin-induced osteosarcoma (OS) cell death. Dioscin induces apoptosis and G2/M arrest. Dioscin inhibits OS proliferation in vitro and in vivo.