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Related Experiment Videos

Mouse brain extract with "fibroblast growth factor"-activity.

E Karasek, K D Jentzsch, A Böhmer

    Experimentelle Pathologie
    |January 1, 1977
    PubMed
    Summary

    Crude mouse brain extracts contain fibroblast growth factor activity, promoting mouse embryo fibroblast survival and proliferation in vitro. This suggests potential applications for these biological extracts in research and development.

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Molecular Biology

    Background:

    • Fibroblast growth factors (FGFs) are crucial signaling proteins involved in cell growth, differentiation, and repair.
    • Previous research by Gospodarowicz et al. (1975) established methods for extracting growth factors from animal tissues.

    Purpose of the Study:

    • To investigate the presence and activity of fibroblast growth factor (FGF) in crude mouse brain extracts.
    • To assess the effect of these extracts on the proliferation and survival of primary fibroblasts in cell culture.

    Main Methods:

    • Crude mouse brain extracts were prepared using homogenization and ammonium sulfate precipitation.
    • Primary mouse embryo fibroblasts and chicken embryo fibroblasts were cultured in the presence and absence of calf serum.
    • Cell proliferation was assessed by measuring cell number and protein content over 48 hours.
    • DNA synthesis was evaluated by measuring thymidine incorporation over 24 hours.

    Main Results:

    • Mouse brain extracts demonstrated fibroblast growth factor activity, significantly promoting the survival and proliferation of primary mouse embryo fibroblasts.
    • This effect was observed both in the presence and absence of calf serum, indicated by dose-dependent increases in cell number and protein content.
    • Serum-free conditions revealed a significant increase in thymidine incorporation within 24 hours, suggesting enhanced DNA synthesis.
    • In contrast, the extracts did not stimulate the proliferation of primary chicken embryo fibroblasts or transformed mouse L-cells.

    Conclusions:

    • Crude mouse brain extracts possess potent fibroblast growth factor activity specific to mouse embryo fibroblasts.
    • These findings highlight the potential of tissue extracts as a source of biologically active molecules for cell culture applications.
    • Further research could explore the purification and characterization of the active components for therapeutic or research purposes.

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