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Related Experiment Videos

Cell division in the developing sympathetic nervous system

I A Hendry

    Journal of Neurocytology
    |June 1, 1977
    PubMed
    Summary

    Cell division in rat superior cervical and stellate ganglia shows neurons divide before postnatal day 3-4, while non-neuronal cells divide later. Nerve growth factor increases neuron numbers by enhancing survival, not division.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Cell Biology

    Background:

    • Understanding neuronal and non-neuronal cell division timing is crucial for nervous system development.
    • The role of nerve growth factor (NGF) in regulating cell proliferation and survival in sympathetic ganglia is not fully elucidated.

    Purpose of the Study:

    • To investigate the temporal dynamics of neuronal and non-neuronal cell division in rat superior cervical and stellate ganglia.
    • To determine the effect of nerve growth factor (NGF) on neuron number and cell division rates during postnatal development.

    Main Methods:

    • [3H] thymidine autoradiography was employed to track cell division in vivo.
    • Experiments spanned from 6 days before birth to 14 days after birth in rat pups.
    • Nerve growth factor (NGF) was administered during specific developmental windows.

    Main Results:

    • Neuronal cell division ceased by postnatal day 4 in superior cervical ganglia and postnatal day 3 in stellate ganglia.
    • Non-neuronal cell division persisted throughout the study period (birth to 14 days postpartum).
    • NGF administration increased neuron numbers, primarily by enhancing neuronal survival rather than increasing cell division, and also stimulated non-neuronal cell division.

    Conclusions:

    • Neuronal proliferation in these sympathetic ganglia is a prenatal and early postnatal event.
    • Nerve growth factor plays a critical role in promoting neuronal survival and influencing non-neuronal cell proliferation during postnatal development.

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