Octopamine in the developing nervous system of the pond snail, Lymnaea stagnalis L

Development of the octopaminergic system in the pond snail, Lymnaea stagnalis, was investigated by means of immunocytochemistry and radioenzymatic assay. The earliest octopamine-immunoreactive neurons appear at a late embryonic stage (E85) of development following metamorphosis. At this moment of de...

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Published inActa biologica Hungarica Vol. 47; no. 1-4; p. 73
Main Authors Elekes, K, Voronezhskaya, E E, Hiripi, L, Eckert, M, Rapus, J
Format Journal Article
LanguageEnglish
Published Hungary 1996
Subjects
Animals
Central Nervous System - growth & development
Central Nervous System - metabolism
Ganglia, Invertebrate - cytology
Ganglia, Invertebrate - metabolism
Immunohistochemistry
Lymnaea - embryology
Lymnaea - growth & development
Lymnaea - metabolism
Neurons - metabolism
Neurotransmitter Agents - metabolism
Octopamine - metabolism
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Summary:Development of the octopaminergic system in the pond snail, Lymnaea stagnalis, was investigated by means of immunocytochemistry and radioenzymatic assay. The earliest octopamine-immunoreactive neurons appear at a late embryonic stage (E85) of development following metamorphosis. At this moment of development, the adult-like pattern of distribution and projection (arborization) characteristics of octopamine-immunoreactive neurone can already be observed. During hatching and postembryonic (juvenile) development the number of labelled neurons increases only within the ventro-medial cell groups of the cerebral ganglia, whereas the extent of varicose axon arborization of the labelled neurons increases gradually. No peripheral projections of the embryonic and postembryonic octopamine-immunoreactive neurons were observed. The postembryonic increase in number of immunoreactive neurons and development of axonal arborization is accompanied by a rapid, exponential enhancement of octopamine content of Lymnaea CNS, as detected radioenzymatically. A possible role of the octopaminergic neurons in the regulation of certain physiological function(s), active only from a late stage of embryonic development, is suggested.
ISSN:0236-5383