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http://dx.doi.org/10.15188/kjopp.2015.04.29.2.180

Relaxation Effects of Nelumbinis Semen in Isolated Corpus Cavernosum  

Park, Sun Young (Department of Physiology, College of Korean Medicine, Semyung University)
Kim, Jin Taek (Department of Anatomy, College of Korean Medicine, Dongguk University)
Kim, Ho Hyun (Department of Physiology, College of Korean Medicine, Semyung University)
Publication Information
Journal of Physiology & Pathology in Korean Medicine / v.29, no.2, 2015 , pp. 180-188 More about this Journal
Abstract
This study was conducted to investigate the relaxation effects and its mechanisms of Nelumbinis Semen(NS) extract in isolated rabbit corpus cavernous tissues. In order to examine the relaxation effects and its mechanisms of NS, we treated the ethanol extract of NS(0.01-3.0 mg/ml) and indomethacin(IM), tetraethylammonium chloride(TEA), Nω -nitro-L-arginine (L-NNA), methylene blue(MB) were treated before NS extract to contracted strips induced by PE 1 μM. We also treated calcium chloride(Ca) 1 mM after pretreatment of NS extract in Ca2+-free krebs-ringer solution to contracted strips induced by PE. Cell viability and NO concentration on human umbilical vein endothelial cell(HUVEC) was measured by MTT assay, Griess reagent system. eNOS production was investigated by histochemical and immunohistochemical staining. NS extract was significantly affected on the relaxation of cavernous strips and NS extract-induced relaxation was not different by pretreatment of IM, TEA, MB, but inhibited by the pretreatment of L-NNA. And increase of contraction induced by Ca2+ addition, in a Ca2+-free solution, was decreased by pretreatment of NS. NO concentration on HUVEC was increased. When NS extract was applicated on corpus cavernosum of penis(CCP) in SHR, ratio of smooth muscles to collage fibers by PE was decreased and formation of eNOS around helicine artery was increased. These results suggest that CCP relaxation effects of NS extract are shown by suppressing influx of extracellular Ca2+ through the production of NO and eNOS.
Keywords
Nelumbinis Semen; Corpus cavernosum; Nitric oxide; eNOS;
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