Anatomical andphysiologicalstudiesofcardiovascularcontrolarelackingintheray- finned fish,thebichirs.Thepresentimmunohistochemicalstudiesonthebichir (Polypterus bichirbichir) demonstratedtheoccurrenceofintracardiacneuronsand nerve fibersintheheart.Immunoreactivitytotyrosinehydroxylase(TH)and acetylcholinesterase (AchE)andvariousneuropeptides(substanceP,galanin, vasoactive intestinalpolypeptide(VIP)andpituitaryadenylatecyclase-activating peptide (PACAP)),includingneuronalnitricoxidesynthase(nNOS),wasfoundinthe nerve cellbodieslyingclosetothe Sinus venosus and thesino-atrialregion.Themain intracardiac localizationofthenervoustissueisanetworkofnervefibers, presumably correspondingtothepostganglionicoutflowgivingrisetonerve terminals andthenervecellbodies.Inaddition,theheartisinnervatedbyextrinsic monoamine-containing nervefiberssupplyingthe Conus arteriosus and Sinus venosus, andsubstancePandgalaninimmunopositivefibersprobablyoriginating from cranialandspinalganglia.Theadrenergicinnervationoftheheartofthebichir is similartothatoftheteleosts,butfurtherstudiesarerequiredonnervouscontrol of theheart.
Distribution and Neurotransmitter Localization in the Heart of the Ray-finned fish, Bichir Polypterus bichir bichir Geoffroy St Hilaire, 1802.
ZACCONE, Giacomo;MAUCERI, Angela Rita;MAISANO, Maria;GIANNETTO, alessia;PARRINO, Vincenzo;FASULO, Salvatore
2009-01-01
Abstract
Anatomical andphysiologicalstudiesofcardiovascularcontrolarelackingintheray- finned fish,thebichirs.Thepresentimmunohistochemicalstudiesonthebichir (Polypterus bichirbichir) demonstratedtheoccurrenceofintracardiacneuronsand nerve fibersintheheart.Immunoreactivitytotyrosinehydroxylase(TH)and acetylcholinesterase (AchE)andvariousneuropeptides(substanceP,galanin, vasoactive intestinalpolypeptide(VIP)andpituitaryadenylatecyclase-activating peptide (PACAP)),includingneuronalnitricoxidesynthase(nNOS),wasfoundinthe nerve cellbodieslyingclosetothe Sinus venosus and thesino-atrialregion.Themain intracardiac localizationofthenervoustissueisanetworkofnervefibers, presumably correspondingtothepostganglionicoutflowgivingrisetonerve terminals andthenervecellbodies.Inaddition,theheartisinnervatedbyextrinsic monoamine-containing nervefiberssupplyingthe Conus arteriosus and Sinus venosus, andsubstancePandgalaninimmunopositivefibersprobablyoriginating from cranialandspinalganglia.Theadrenergicinnervationoftheheartofthebichir is similartothatoftheteleosts,butfurtherstudiesarerequiredonnervouscontrol of theheart.Pubblicazioni consigliate
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