Caspase-3-mediated GSDME activation contributes to cisplatin- and doxorubicin-induced secondary necrosis in mouse

Feng-Yi Mai1, Pengyan He2, Jie-Zhou Ye1

  • 1Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China.

Cell Proliferation
|July 27, 2019
PubMed
Abstract

Insights

Chemotherapy drugs like cisplatin and doxorubicin cause cell death in macrophages by activating caspase-3 and gasdermin E (GSDME), leading to secondary necrosis.

Area of Science:

  • Immunology
  • Cell Biology
  • Pharmacology

Background:

  • Chemotherapeutic agents induce cell death, involving mechanisms like secondary necrosis and pyroptosis.
  • Gasdermin E (GSDME) is a key mediator in these cell death pathways.
  • Understanding drug-induced macrophage toxicity is crucial for cancer therapy.

Purpose of the Study:

  • To investigate the role of GSDME in mediating the cytotoxic effects of cisplatin and doxorubicin on mouse macrophages.
  • To elucidate the specific cell death pathways involved in chemotherapy-induced macrophage death.

Main Methods:

  • Treatment of RAW 264.7 cells and bone marrow-derived macrophages (BMDMs) with cisplatin or doxorubicin.
  • Assay of necrosis using propidium iodide staining and protein expression via immunoblotting.
  • GSDME knockdown using small interfering RNA and in vivo evaluation of macrophage toxicity in mice.

Main Results:

  • Cisplatin and doxorubicin induced dose-dependent necrosis in macrophages.
  • Caspase-3 activation led to GSDME cleavage and subsequent secondary necrosis/pyroptosis.
  • GSDME knockdown and caspase-3 inhibition significantly reduced macrophage necrosis.
  • Cisplatin treatment depleted peritoneal macrophages in mice, correlating with GSDME activation.

Conclusions:

  • Chemotherapy-induced macrophage cytotoxicity is partly mediated by caspase-3/GSDME-dependent secondary necrosis.
  • GSDME plays a critical role in the toxic effects of cisplatin and doxorubicin on macrophages.

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