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Prevention of programmed cell death of sympathetic neurons by the bcl-2 proto-oncogene

I Garcia1, I Martinou, Y Tsujimoto

  • 1Department of Pathology, Centre Médical Universitaire, Geneva, Switzerland.

Science (New York, N.Y.)
|October 9, 1992
PubMed

Insights

The proto-oncogene bcl-2 prevents programmed cell death (apoptosis) in developing neurons deprived of nerve growth factor. This suggests Bcl-2 protein mediates neurotrophic factor effects on neuronal survival.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Developmental Biology

Background:

  • Neuronal development involves significant programmed cell death (apoptosis).
  • Neurotrophic factors are crucial for neuronal survival, but their molecular mechanisms are unclear.
  • The proto-oncogene bcl-2 is expressed in the nervous system.

Purpose of the Study:

  • To investigate the molecular mechanisms by which neurotrophic factors regulate neuronal apoptosis.
  • To determine if the Bcl-2 proto-oncogene plays a role in mediating the survival effects of neurotrophic factors.

Main Methods:

  • Overexpression of the bcl-2 proto-oncogene in cultured sympathetic neurons.
  • Induction of apoptosis by nerve growth factor deprivation.

Main Results:

  • Overexpression of bcl-2 prevented apoptosis in cultured sympathetic neurons.
  • Neurons lacking nerve growth factor support underwent normal apoptosis without bcl-2 overexpression.

Conclusions:

  • The Bcl-2 protein is a key mediator of neurotrophic factor-induced neuronal survival.
  • Bcl-2 acts as a critical regulator in preventing programmed cell death during neuronal development.

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