PMID: 8971807Nov 29, 1996Paper

Physiological actions of the neuropeptide Antho-RNamide on antagonistic muscle systems in sea anemones

Neuroscience Letters
K Cho, I D McFarlane

Abstract

Antagonistic contractions of longitudinal and circular muscles in the body wall cause shape changes in sea anemones. Single electrode voltage clamp recordings from Calliactis parasitica body wall preparations distinguish two cell types (Types 1 and 2) with different time courses of evoked inward current. The anthozoan neuropeptide Antho-RNamide (L-3-phenyllactyl-Leu-Arg-Asn-NH2) excites longitudinal body wall preparations and Type 1 cells, but inhibits circular body wall preparations and Type 2 cells. Type 1 and Type 2 cells may therefore belong to longitudinal and circular myoepithelium respectively. Antho-RNamide may open Ca2+ channels in longitudinal muscle cells and K+ channels in circular muscle cells. This opposite action of a neuropeptide is of significance in the control of antagonistic contractions.

References

Feb 1, 1995·Trends in Neurosciences·L L Iversen
Apr 15, 1996·Journal of Neuroscience Research·K Cho, I D McFarlane

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Citations

Nov 15, 2006·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·G Kass-Simon, Paola Pierobon
Feb 9, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Detlev Arendt

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