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[Astrogliosis and basic fibroblast growth factor].

L Li1, Z Ye, J Zhu

  • 1Department of Pathology, Shanghai Medical University.

Zhonghua Bing Li Xue Za Zhi = Chinese Journal of Pathology
|February 1, 1997
PubMed
Summary
This summary is machine-generated.

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Autocrine basic fibroblast growth factor (bFGF) is an early response in reactive astrocytes, promoting astrogliosis. This process involves astrocyte hypertrophy and increased glial fibrillary acidic protein (GFAP) expression, driven by GFAP-mRNA upregulation.

Area of Science:

  • Neuroscience
  • Cell Biology

Context:

  • Reactive astrogliosis is a complex cellular response to central nervous system injury.
  • Understanding the molecular mechanisms driving astrogliosis is crucial for developing therapeutic strategies.
  • Basic fibroblast growth factor (bFGF) is implicated in various cellular processes, including proliferation and differentiation.

Purpose:

  • To investigate the role of autocrine basic fibroblast growth factor (bFGF) in reactive astrogliosis.
  • To elucidate the relationship between bFGF expression and key markers of astrocyte activation, such as glial fibrillary acidic protein (GFAP).
  • To examine the temporal dynamics of bFGF and GFAP expression following mechanical injury in primary astrocyte cultures.

Summary:

  • Mechanical scratch induced rapid bFGF expression in astrocytes, peaking at 12 hours.

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  • Glial fibrillary acidic protein messenger RNA (GFAP-mRNA) and GFAP expression increased significantly, correlating with astrocyte hypertrophy and process extension.
  • Proliferating cell nuclear antigen (PCNA) expression indicated astrocyte proliferation within 2 hours of injury.

    • Impact:

    • Autocrine bFGF acts as an early promoter of reactive astrogliosis.
    • Enhanced GFAP expression results from GFAP-mRNA upregulation, a key event in astrocyte activation.
    • Astrocyte hypertrophy is a prominent feature of reactive astrogliosis, contributing to glial scar formation.