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Related Experiment Videos

Growth cones in developing cultured cortical neurons.

H Asou, N Mutou, S Hirano

    Cell Structure and Function
    |February 1, 1987
    PubMed
    Summary

    Growth cones in fetal rat cerebral hemisphere cultures were studied. Ganglioside GM1 was found in these growth cones at both 6 and 21 days, indicating its presence during neural development.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Cell Biology

    Background:

    • Growth cones are crucial structures for neuronal development and axon guidance.
    • Primary cultures of fetal rat cerebral hemispheres provide a model for studying neuronal growth.

    Purpose of the Study:

    • To characterize the morphology and presence of growth cones in early-stage cultures.
    • To investigate the persistence and characteristics of growth cones in later-stage cultures.
    • To determine the presence of Ganglioside GM1 in cultured growth cones across different time points.

    Main Methods:

    • Preparation of primary cultures from fetal rat cerebral hemispheres at 6 days old.
    • Observation and size measurement of growth cones in 6-day-old and 21-day-old cultures.
    • Microscopic analysis to identify lamellipodia and filopodia on growth cones.
    • Immunochemical detection of Ganglioside GM1 in cultured growth cones.

    Main Results:

    • Abundant growth cones, averaging 24 by 28 microns, were observed in 6-day-old cultures.
    • These growth cones exhibited both lamellipodia and filopodia.
    • A few growth cones persisted in 21-day-old cultures, also displaying lamellipodia and filopodia.
    • Ganglioside GM1 was detected in growth cones from both 6-day-old and 21-day-old cultures.

    Conclusions:

    • Fetal rat cerebral hemisphere cultures support the presence and development of growth cones.
    • Growth cones maintain their characteristic structures (lamellipodia, filopodia) over time in culture.
    • Ganglioside GM1 is present in cultured growth cones, suggesting its role in neuronal development and maintenance.

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