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Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c
07:42

Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c

Published on: June 29, 2011

Essential role of active nuclear transport in apoptosis

N Yasuhara1, Y Eguchi, T Tachibana

  • 1Department of Medical Genetics, Biomedical Research Centre, Osaka University Medical School, Suita, Japan.

Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|January 1, 1997
PubMed
Abstract

Insights

Active nuclear transport is essential for apoptosis signaling. Inhibiting this transport prevents nuclear changes associated with programmed cell death, indicating its critical role in the apoptotic pathway.

Area of Science:

  • Cell Biology
  • Molecular Biology

Background:

  • Apoptosis involves nuclear changes like chromatin condensation and fragmentation.
  • Apoptotic signals use cytoplasmic pathways involving ICE-family proteases and Bcl-2.
  • Signal transmission from cytoplasm to nucleus is necessary for nuclear apoptotic manifestation.

Purpose of the Study:

  • To investigate if active nuclear transport mechanisms are involved in transmitting apoptotic signals to the nucleus.
  • To determine the role of active nuclear transport in the overall process of apoptosis.

Main Methods:

  • Microinjection of inhibitors of active nuclear transport into cells.
  • Analysis of the effects of these inhibitors on Fas-induced apoptosis.
  • Assessment of inhibition on apoptosis induced by microinjected CPP32beta/Yama protease.

Main Results:

  • Inhibitors of active nuclear transport, including Wheat germ agglutinin (WGA), prevent Fas-induced apoptotic nuclear changes.
  • WGA also blocks apoptosis-related nuclear changes induced by active CPP32beta/Yama protease.
  • These findings demonstrate that active nuclear transport is required for apoptotic signal transduction.

Conclusions:

  • Active nuclear transport is a critical component of apoptotic signal transduction.
  • Blocking active nuclear transport effectively inhibits the progression of apoptosis.
  • The study provides strong evidence for the necessity of nuclear transport in programmed cell death.

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