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Morphological and biochemical changes during formocresol induced cell death in murine peritoneal macrophages:

María Lorena Cardoso1, Juan Santiago Todaro, María Victoria Aguirre

  • 1Faculty of Medicine, Department of Biochemistry, National Northeast University, Moreno, Corrientes, Argentina.

Cell Biology and Toxicology
|March 30, 2010
PubMed

Insights

Formocresol (FC) induces distinct cell death pathways in macrophages. Bax-dependent apoptosis occurs early (2-6h), while later necrosis (4-18h) is linked to Fas and Hsp60 stress signals.

Area of Science:

  • Cell Biology
  • Immunology
  • Toxicology

Background:

  • Formocresol (FC) is used in dentistry.
  • Its effects on macrophages, key immune cells, are not fully understood.

Purpose of the Study:

  • To investigate Formocresol's role in inducing apoptosis and necrosis in murine peritoneal macrophages (pMø).
  • To elucidate the molecular pathways involved in FC-induced cell death.

Main Methods:

  • Macrophages were cultured with FC (1:100) for 2-24 hours.
  • Cell viability, morphology, and apoptosis/necrosis indexes were assessed.
  • Protein expression (Bax, Bcl-x(L), Fas, Hsp60) was analyzed via western blotting.

Main Results:

  • FC induced maximal apoptosis from 2-6h, correlating with Bax overexpression.
  • Maximal Bcl-x(L) expression (12-24h) suggested a survival effect.
  • Increased necrosis (4-12h) coincided with Fas and Hsp60 overexpression, indicating stress signaling.

Conclusions:

  • FC triggers two distinct cell death pathways in macrophages.
  • An early Bax-dependent apoptotic pathway (2-6h).
  • A later necrotic pathway (4-18h) associated with Fas and Hsp60 stress signals.

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