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Related Experiment Videos

GFAP gene expression during development of astrocyte

H Baba1, K Nakahira, N Morita

  • 1Laboratory for Neural Information, National Institute for Physiological Sciences, Aichi, Japan.

Developmental Neuroscience
|January 1, 1997
PubMed
Summary

Researchers developed a novel assay to study glial fibrillary acidic protein (GFAP) promoter activity in astrocytes. This method identifies astrocyte progenitors and establishes immortalized cell lines for studying astrocyte differentiation.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Glial fibrillary acidic protein (GFAP) is a specific marker for astrocytes in the central nervous system.
  • Understanding GFAP gene regulation is crucial for studying astrocyte function and differentiation.

Purpose of the Study:

  • To develop an assay system for characterizing GFAP promoter activity in cultured cells.
  • To identify regulatory mechanisms of GFAP expression.
  • To establish immortalized astrocyte cell lines for further research.

Main Methods:

  • Utilized retrovirus vectors to fuse the mouse GFAP promoter with the lacZ gene.
  • Infected mixed glial cultures and visualized GFAP promoter activity using X-Gal staining.
  • Employed fluorescence-activated cell sorting (FDG-FACS) with FDG substrate for cell separation.

Related Experiment Videos

  • Established immortalized astrocyte cell lines from transgenic mice (Immorto mouse).

    • Main Results:

    • A 256 bp fragment of the GFAP promoter was sufficient for astrocyte-specific expression.
    • GFAP promoter activity precedes detectable GFAP protein, enabling identification of astrocyte progenitors.
    • Successfully established mature and immature immortalized astrocyte cell lines.
    • Demonstrated the utility of temperature-sensitive SV40 T antigen for controlling immortalization and differentiation.

    Conclusions:

    • The developed assay system effectively characterizes GFAP promoter activity and aids in identifying astrocyte progenitors.
    • The established immortalized astrocyte cell lines provide valuable tools for investigating astrocyte differentiation mechanisms.
    • GFAP promoter activity detection serves as an early marker for astrocyte development.