Acetylcholine produces contraction mediated by cyclooxigenase pathway in arterial vessels in the marine fish (Isacia conceptionis)

Brazilian Journal of Biology

Fa. Moraga¹  N. Urriola-urriola¹ 

关键词: intertidal fish;    vascular reactivity;    acetylcholine;    atropine;    indomethacin;    cycloxygenase;    peixes marinos;    reatividade vascular;    acetilcolina;    atropina;    indometacina;    ciclo-oxigenase;   

DOI  :  10.1590/1519-6984.13413

来源: SciELO

【 摘 要 】

Preliminary studies showed that dorsal artery contraction mediated by acetylcholine (ACh) is blocked with indomethacin in intertidal fish (G. laevifrons). Our objective was to characterize the cholinergic pathway in several artery vessels of the I. conceptionis. Afferent and efferent branchial, dorsal and mesenteric arteries were dissected of 6 juvenile specimens, isometric tension studies were done using doses response curves (DRC) for Ach (10–13 to 10–3 M), and cholinergic pathways were obtained by blocking with atropine or indomethacin. CRC to ACh showed a pattern of high sensitivity only in efferente branchial artery and low sensibility in all vessels. Furthermore, these contractions were blocked in the presence of atropine and indomethacin in all vessels. Our results corroborate previous results observed in intertidal species that contraction induced by acetylcholine is mediated by receptors that activate a cyclooxygenase contraction pathway.

【 授权许可】

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