A neurohormone of cephalopods with cardioexcitatory activity

Blanchi, D; Noviello, Luigi; Libonati, Massimo

doi:10.1016/0016-6480(73)90059-2

Cited by 22 publications

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References 9 publications

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“…Therefore, these ganglia are the terminus of a secretory neuron-system like the neurohypophysis and they may be responsible for the forming and secretion of hormones. The hormones, neuropeptides and catecholamines, are released into the lumen of the vena cephalica and regulate the circulatory system (Blanchi, Noviello & Libonati, 1973;Fiedler, 1992). I would like to thank Prof. Dr R. Schipp for the theme of my doctoral thesis, and A. Hudel for her technical help.…”

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Localization of an extracerebral NSV‐ganglion in the cephalopod, Sepia officinalis

Marschinke

1997

Journal of Zoology

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With 10 plates in the text)The neurosecretory system of the vena cava (NSV) of Sepia uficinalis contacts the palliovisceral lobe with some axons that run parallel to the visceral nerves. Distal to the palliovisceral lobe the NSVsystem widens to form a hitherto unknown extracerebral ganglion containing approximately 4200 perikarya. This is regarded as the primary origin of neurotransmitters. Distal to this nucleus area the volume and the number of cell bodies in the NSV-system is reduced. It contains neurosecretory nerve cells, two glial cell types, large cell accumulations, connective tissue and capillaries. Histochemical, immunohisto-and immunocytochemical examinations show the existence of catecholamines, and the coexistence of serotonin and FMRFamide in the NSV-System. A HPLC analysis differentiated between dopamine, noradrenaline, and adrenaline.

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Localization of an extracerebral NSV‐ganglion in the cephalopod, Sepia officinalis

Marschinke

1997

Journal of Zoology

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Invertebrate Circulatory Systems

McMahon

Wilkens

Smith

1997

Comprehensive Physiology

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The sections in this article are: Protozoa and Parazoa Cnidaria Platyhelminthes Nemerteans Annelids Polychaetes and Oligochaetes Hirudinea Molluscs Heart and Vascular Performance Arthropods I: Onychophorans Arthropods II : Chelicerates Limulus Scorpions Spiders Arthropods III : Uniramia Myriapods Chilopods Insects Arthropods IV : Crustaceans Echinoderms Pogonophora Vestimentifera Hemichordates Urochordates Cephalochordates Conclusion

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The possible role of vena cava peptides in regulation of the branchial hearts of Sepia officinalis L. (cephalopoda)

Fiedler

1992

J. Exp. Zool.

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An analysis was made of the effects of 5 neuropeptides on the isolated branchial heart of Sepia oficinalis. There is evidence to suggest that these 5 neuropeptides occur in the neurosecretory system of the vena cava (NSV system) of cephalopods. YGGFMRFamide and oxytocin caused concentration-dependent increases in pressure amplitude in the perfused preparations, with their effects on heart rate being negligible. The molluscan neuropeptide FMRFamide hardly had any effect on the branchial heart beat when applied alone, but it counteracted the positive inotropic actions of noradrenaline. FLRFamide and a-melanotropin had no effect in our system. None of the peptides tested in bioassays on branchial hearts was as efficient as a perfusate obtained from the cephalic vein of Sepia (including the NSV area) that had been stimulated by electrical irritation of the attached visceral nerves. These findings suggest that there may be further neurohormones in the NSV system that are released into the vessel lumen. It is suggested that the branchial hearts of Sepia in vivo are influenced by humoral peptides from the NSV system and that these peptides may act directly on target myocytes or may alter (i.e., potentiate or oppose) the effects of other cardioactive compounds.0 1992 Wiley-Liss, Inc.

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A neurohormone of cephalopods with cardioexcitatory activity

Cited by 22 publications

References 9 publications

Localization of an extracerebral NSV‐ganglion in the cephalopod, Sepia officinalis

Localization of an extracerebral NSV‐ganglion in the cephalopod, Sepia officinalis

Invertebrate Circulatory Systems

The possible role of vena cava peptides in regulation of the branchial hearts of Sepia officinalis L. (cephalopoda)

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