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EnglishA studywasundertakentodeterminethedistributionofspecifictypesofautonomic nerves andthepresenceofvarioustransmittersubstancesintheheartoftwoteleost species: themullet(Mugil cephalus) andtheNilecatfish(Synodontis nigriventris). Large nervetrunksinthesinusvenosuswereshowntocontaintyrosinehydroxylase immunoreactivity andindicatethelocationofadrenergicnervefibers,whichare also associatedwithacoronarycirculationtotheventricularmyocardiuminthe mullet heart.Fluorescenceimmunolabellingmethodsrevealedthattheatriumand the outerandinnercompactmuscleoftheventriclehavenervesinwhichsubstance P andgalanin(GA)arelocalized.Itseemslikelythatthecellbodies(perikarya)of the substancePandGA-immunopositiveaxonsarelocatedatsitesoutsidetheheart. The GA-immunopositivenervefibersmayrepresentapopulationofaxonsof intramural postganglionicnervecellbodies.Mostintracardiacnervecellbodiesare located inthesinusvenosusandinthesinoatrialjunctionandrevealimmunor- eactivity tosubstanceP,GA,neuronalnitricoxidesynthase(nNOS),vasoactive intestinal peptide(VIP)andpituitaryadenylatecyclase-activatingpeptide(PACAP). Furthermore, substancePimmunoreactivityispresentinthecardiaccells intermingled withthesubstanceP-immunopositivenervefibers.Anerveplexus consisting ofawell-developednetworkofnervefibersandnervecellbodiesmay possibly correspondtoacardiacpacemaker,butitsfunctioninfishcardiac regulation isunknownandremainstobeelucidated.
| Titolo: | Postganglionic nerve cell bodies and neurotransmitter localization in the teleost heart. | |
| Autori: | ||
| Data di pubblicazione: | 2010 | |
| Rivista: | ||
| Abstract: | A studywasundertakentodeterminethedistributionofspecifictypesofautonomic nerves andthepresenceofvarioustransmittersubstancesintheheartoftwoteleost species: themullet(Mugil cephalus) andtheNilecatfish(Synodontis nigriventris). Large nervetrunksinthesinusvenosuswereshowntocontaintyrosinehydroxylase immunoreactivity andindicatethelocationofadrenergicnervefibers,whichare also associatedwithacoronarycirculationtotheventricularmyocardiuminthe mullet heart.Fluorescenceimmunolabellingmethodsrevealedthattheatriumand the outerandinnercompactmuscleoftheventriclehavenervesinwhichsubstance P andgalanin(GA)arelocalized.Itseemslikelythatthecellbodies(perikarya)of the substancePandGA-immunopositiveaxonsarelocatedatsitesoutsidetheheart. The GA-immunopositivenervefibersmayrepresentapopulationofaxonsof intramural postganglionicnervecellbodies.Mostintracardiacnervecellbodiesare located inthesinusvenosusandinthesinoatrialjunctionandrevealimmunor- eactivity tosubstanceP,GA,neuronalnitricoxidesynthase(nNOS),vasoactive intestinal peptide(VIP)andpituitaryadenylatecyclase-activatingpeptide(PACAP). Furthermore, substancePimmunoreactivityispresentinthecardiaccells intermingled withthesubstanceP-immunopositivenervefibers.Anerveplexus consisting ofawell-developednetworkofnervefibersandnervecellbodiesmay possibly correspondtoacardiacpacemaker,butitsfunctioninfishcardiac regulation isunknownandremainstobeelucidated. | |
| Handle: | http://hdl.handle.net/11570/1917221 | |
| Appare nelle tipologie: | 14.a.1 Articolo su rivista |
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