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Related Experiment Videos

Developmental changes in 5-hydroxytryptamine immunoreactivity of sympathetic cells.

S Soinila1, M Ahonen, T Lahtinen

  • 1Mark O. Hatfield Marine Science Center, Oregon State University, Newport 97365.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
|January 1, 1989
PubMed
Summary

Developing sympathetic nervous system cells initially express 5-hydroxytryptamine, a property some cells lose during maturation. This neurotransmitter

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • 5-Hydroxytryptamine (serotonin) plays a crucial role in neuronal development and function.
  • Catecholamine-synthesizing cells are key components of the sympathetic nervous system.
  • The developmental expression patterns of neurotransmitters in sympathetic tissues are not fully understood.

Purpose of the Study:

  • To investigate the presence and regulation of 5-hydroxytryptamine (serotonin) in developing sympathetic ganglia, adrenal medullae, and paraganglia.
  • To determine how 5-hydroxytryptamine expression changes during the maturation of catecholamine-synthesizing cells.
  • To explore the relationship between 5-hydroxytryptamine and catecholamine synthesis during development.

Main Methods:

  • Immunohistochemical detection of 5-hydroxytryptamine.

Related Experiment Videos

  • Analysis of developing and mature sympathetic chain ganglia, adrenal medullae, and retroperitoneal paraganglia.
  • Investigation of L-tryptophan loading effects on adult neurons.

    • Main Results:

    • Initially, all catecholamine-synthesizing cells showed 5-hydroxytryptamine immunoreactivity.
    • During maturation, some sympathetic cell types lose this 5-hydroxytryptamine property.
    • Small intensely fluorescent cells in ganglia retained 5-hydroxytryptamine; adrenal medulla cells retained it in adrenaline-synthesizing cells; paraganglion cells showed it in both adrenaline and noradrenaline cells.

    Conclusions:

    • Initial 5-hydroxytryptamine expression in catecholamine-synthesizing cells is linked to the onset of catecholamine synthesis.
    • The regulation of 5-hydroxytryptamine expression differs across mature sympathetic organs.
    • Developmental plasticity of 5-hydroxytryptamine expression is evident, even in adult neurons.