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Nitric oxide: a potential inducer of adhesion-related apoptosis--anoikis

H P Monteiro1, E F Silva, A Stern

  • 1Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil. hpmonte@uol.com.br

Nitric Oxide : Biology and Chemistry
|March 31, 2004
PubMed

Insights

Nitric oxide, an anti-adhesive substance, triggers apoptosis by disrupting cell-extracellular matrix interactions, leading to anoikis (apoptosis from loss of anchorage). This review details nitric oxide's role in anchorage-induced cell death.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Apoptosis, or programmed cell death, can be initiated by various cellular events.
  • Loss of cell-extracellular matrix contact, known as anoikis, is a well-studied form of apoptosis.
  • Anti-adhesive substances can trigger anoikis by disrupting cell adhesion.

Purpose of the Study:

  • To review the evidence on how nitric oxide (NO) contributes to apoptosis induced by loss of anchorage (anoikis).
  • To elucidate the mechanisms by which NO acts as an anti-adhesive substance and signaling molecule in anoikis.

Main Methods:

  • Literature review of studies investigating nitric oxide's role in apoptosis and cell adhesion.
  • Analysis of molecular mechanisms linking NO to focal adhesion complexes and cytoskeleton alterations.
  • Examination of cellular responses to NO in the context of extracellular matrix detachment.

Main Results:

  • Nitric oxide inhibits cell adhesion and interferes with focal adhesion complex assembly.
  • NO disrupts cell-extracellular matrix interactions, a key event in anoikis.
  • These effects are observed in cells where growth factor signaling is dissociated from cytoskeletal changes, promoting apoptosis.

Conclusions:

  • Nitric oxide acts as an anti-adhesive substance capable of inducing anoikis.
  • NO plays a significant role in the signaling pathways that lead to apoptosis upon loss of anchorage.
  • Understanding NO's function in anoikis provides insights into programmed cell death regulation.

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