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Updated: Aug 19, 2026

Lighting Up the Pathways to Caspase Activation Using Bimolecular Fluorescence Complementation
08:47

Lighting Up the Pathways to Caspase Activation Using Bimolecular Fluorescence Complementation

Published on: March 5, 2018

A generalized caspase inhibitor disrupts early mammalian development

Zahra Zakeri1, Richard A Lockshin, Luis-Miguel Criado-Rodríguez

  • 1Department of Biology, Queens College and Graduate Center of the City University of New York, New York, USA. zahra_zakeri@qc.edu

The International Journal of Developmental Biology
|March 4, 2005
PubMed

Insights

Early mammalian embryo cell death is not caspase-dependent. Caspase activity plays a role in early embryos, but not in cell death, suggesting novel functions beyond apoptosis.

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Mammalian Embryogenesis

Background:

  • The mechanisms of cell death in early mammalian embryos remain largely uncharacterized.
  • Understanding these processes is crucial for developmental biology and reproductive health.

Purpose of the Study:

  • To investigate the role and mechanisms of cell death in early mouse embryos.
  • To determine the involvement of caspases in embryonic cell death.

Main Methods:

  • Culturing mouse embryos in vitro from fertilization to blastula stage.
  • Utilizing caspase inhibitors, including specific inhibitors for caspases 3, 7, and 8, and a pan-caspase inhibitor (zVAD-FMK).
  • Observing and quantifying cell death events and embryonic development.

Main Results:

  • Polar body death was not inhibited by caspase inhibitors.
  • Post-cavitation cell death was unaffected by specific caspase inhibitors (3, 7, 8).
  • Pan-caspase inhibition from the 1-2 cell stage led to expanded post-cavitation death and embryo malformation/death.

Conclusions:

  • Early embryonic cell deaths in mice are not mediated by caspases.
  • Caspase activity is present and plays a role in early mammalian embryos, independent of cell death.
  • These findings suggest non-apoptotic functions for caspases during early embryogenesis.

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