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Related Experiment Videos

Neurosecretion competence. A comprehensive gene expression program identified in PC12 cells.

Christophe Grundschober1, Maria Luisa Malosio, Laura Astolfi

  • 1Central Nervous System, F. Hoffmann-La Roche Ltd., Grenzacherstrasse, Basel 4070, Switzerland.

The Journal of Biological Chemistry
|June 19, 2002
PubMed
Summary

Neurosecretory cell function relies on specific vesicles and granules. This study reveals that the loss of these, in neurosecretion-incompetent clones, is linked to widespread changes in gene expression, not just neurosecretion-related genes.

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Area of Science:

  • Cell Biology
  • Neuroscience
  • Genomics

Background:

  • Neurosecretory cells release substances via regulated exocytosis involving clear vesicles and dense granules.
  • Neurosecretion-incompetent pheochromocytoma PC12 cell clones lack these essential organelles.
  • PC12 cell line heterogeneity necessitates comparison of multiple clones for accurate phenotype characterization.

Purpose of the Study:

  • To comprehensively analyze gene expression differences between neurosecretion-incompetent and wild-type PC12 cell clones.
  • To identify the broader gene expression program associated with the neurosecretory cell phenotype.
  • To investigate the molecular basis of neurosecretion incompetence in PC12 cells.

Main Methods:

  • Utilized high-density oligonucleotide arrays to compare transcript levels of 4,200 genes and 19,000 expressed sequence tags (ESTs).

Related Experiment Videos

  • Compared two pairs of pheochromocytoma PC12 cell clones: wild-type and neurosecretion-incompetent.
  • Applied rigorous data processing for quality control and filtration to identify consistently changed transcripts.

    • Main Results:

    • Identified 755 consistently changed transcripts (448 genes, 307 ESTs) between incompetent and wild-type clones.
    • Observed profound down-regulation of many neurosecretion-related genes in incompetent cells.
    • Found significant alterations in nuclear and transcription factors, signaling, and metabolism genes, while endocytosis gene expression remained normal.

    Conclusions:

    • Neurosecretory vesicle and granule expression is regulated by a complex gene expression program.
    • The neurosecretory phenotype involves coordinated changes in transcription factors, signaling, and metabolism, extending beyond direct neurosecretion machinery.
    • This study provides novel insights into the molecular underpinnings of neurosecretion competence and incompetence.