Phospholipase C-mediated vasorelaxing action of melatonin in rat isolated aorta
2005
Kim, S.J. (Chonbuk National University, Jeonju, Republic of Korea) | Baek, S.S. (Chonbuk National University, Jeonju, Republic of Korea) | Kang, H.S. (Chonbuk National University, Jeonju, Republic of Korea) | Kim, J.S. (Chonbuk National University, Jeonju, Republic of Korea), E-mail: kimjs@chonbuk.ac.kr
Melatonin, the principal hormone of the vertebral pineal gland, participates in the regulation of cardiovascular system in vitro and in vivo. However, the effects of melatonin on vascular tissues are still vague. The aim of this study was to assess the relationship between phospholipase C (PLC) and nitric oxide synthase (NOS)/cyclic guanosine 3',5'-monophosphate (cGMP) signaling cascade in the relaxatory action of melatonin in isolated rat aorta. Melatonin induced a concentration-dependent relaxation in phenylephrine (PE)- and KCl-precontraceted endothelium intact (+E) aortic rings.
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