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Updated: Oct 9, 2026

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Bcl-2 protects against apoptosis-related microtubule alterations in neuronal cells

R Nuydens1, G Dispersyn, G Van Den Keiboom

  • 1Department of Cell Physiology, Janssen Research Foundation, Beerse, Belgium.

Apoptosis : an International Journal on Programmed Cell Death
|March 3, 2001
PubMed

Insights

The Bcl-2 gene protects neurons by stabilizing their structure and preventing cell death. It influences microtubule stability and tubulin modification, crucial for neuronal health in neurodegenerative conditions.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Neurodegenerative diseases are characterized by neuronal cell death and loss of neurite morphology.
  • The anti-apoptotic gene Bcl-2 plays a crucial role in neuronal survival.
  • Microtubule stability is essential for maintaining neuronal structure and function.

Purpose of the Study:

  • To investigate the effect of Bcl-2 on neuronal morphology and microtubule stability in PC12 cells.
  • To determine if Bcl-2 influences tubulin post-translational modifications.
  • To explore the protective mechanisms of Bcl-2 against neurotoxic insults.

Main Methods:

  • Overexpression of Bcl-2 in nerve growth factor-differentiated PC12 cells.
  • Modulation of microtubule dynamics using taxol (stabilizer) and okadaic acid (destabilizer).
  • Assessment of neurite morphology, microtubule stability, tubulin acetylation, and tau phosphorylation.

Main Results:

  • Bcl-2 overexpression protected against taxol- and okadaic acid-induced neurite retraction.
  • Bcl-2 normalized the ratio of acetylated tubulin to total tubulin under both stabilizing and destabilizing conditions.
  • Bcl-2 reduced okadaic acid-induced cell death and nuclear fragmentation, independent of tau phosphorylation.

Conclusions:

  • Bcl-2 exerts a protective effect on the neuronal cytoskeleton, likely through modulation of tubulin post-translational modifications.
  • Bcl-2's anti-apoptotic function in neurodegeneration may be linked to its influence on microtubule dynamics and stability.
  • These findings highlight Bcl-2 as a potential therapeutic target for neurodegenerative disorders.

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