2001
DOI: 10.1002/1097-010x(20010415/30)289:5<273::aid-jez1>3.0.co;2-l
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Vasoactivity of the ventral aorta of the American eel (Anguilla rostrata), Atlantic hagfish (Myxine glutinosa), and sea lamprey (Petromyzon marinus)

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Cited by 36 publications
(10 citation statements)
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“…In teleosts, cholinergic innervations contribute to the increasing of branchial resistance, which is attenuated by the pretreatment with atropine (8), but it remains uncertain whether cholinergic nerves innervate systemic circulation and directly regulate blood pressure (42,53). Intraarterial injection of ACh increased arterial pressure in this study (data not shown) and ACh causes vasoconstriction in the eel ventral and dorsal aorta (7,20,43), although it is unclear whether the constriction is induced through the muscarinic receptor or not. Therefore, it is possible that VNP activates cholinergic system and exerts the pressor effect in eels.…”
Section: Discussionmentioning
confidence: 67%
“…In teleosts, cholinergic innervations contribute to the increasing of branchial resistance, which is attenuated by the pretreatment with atropine (8), but it remains uncertain whether cholinergic nerves innervate systemic circulation and directly regulate blood pressure (42,53). Intraarterial injection of ACh increased arterial pressure in this study (data not shown) and ACh causes vasoconstriction in the eel ventral and dorsal aorta (7,20,43), although it is unclear whether the constriction is induced through the muscarinic receptor or not. Therefore, it is possible that VNP activates cholinergic system and exerts the pressor effect in eels.…”
Section: Discussionmentioning
confidence: 67%
“…Desert Island Biological Laboratory, Salsbury Cove, ME for at least one week before use. They had been captured in the Union River (near Bangor, Maine) during the months of July and August, 1997August, , 1998August, , and 2001 Eels were anesthetized in 0.1% MS-222 (Sigma Chemical) in sea water, double-pithed after cervical transection, and the BA was removed by dissection; cross-sectional rings were mounted in 10 ml of teleost Ringer's solution (mM/l: NaCl, 148; NaHCO 3 , 14.9; NaH 2 PO 4 , 2.7; KCl, 2.6; CaCl 2 , 1.26; MgSO 4 , 1.24; Glucose, 5, bubbled with 1% CO 2 in air, pH¼7.8) in organ baths and maintained at 121C as described previously (Evans et al, '89;Evans and Gunderson, '98;Evans and Harrie, 2001). Initial tensions were maintained at ca.…”
Section: Methodsmentioning
confidence: 99%
“…Initial experiments tested the sensitivity of the BA rings to acetylcholine (10 -4 M), followed by the sequential addition of the following: ET-1 (10 À7 M), SNP (10 À4 M), NO (4.2 Â 10 À6 M), eANP (10 À7 M), CPR (10 À6 M), and PGE 1 (10 À6 M) to a given ring. Specific concentrations of all agonists were chosen because our earlier studies had determined that they produced significant responses in eel aortic rings (Evans and Harrie, 2001). Subsequent experiments were designed to determine the concentration dependence of the effects of some of the agonists, as well as to begin to characterize the specific receptor involved.…”
Section: Methodsmentioning
confidence: 99%
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“…Stimulation of b-adrenergic receptors also increased heart rate and pulse pressure in lamprey (Lignon 1979) via the modulation of intracellular calcium availability . In isolated lamprey aortic ring constricted by endothelin, and prostaglandin but not nitric oxide produced significant vasodilation (Evans & Harrie 2001). Based on available information, direct comparison between the angiotensin effect in bird and lamprey is inappropriate because of the intrinsic differences of their cardiovascular systems.…”
Section: Discussionmentioning
confidence: 99%