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http://dx.doi.org/10.6116/kjh.2015.30.4.71.

The Relaxation Effects of Alpiniae Oxyphyllae Fructus on Isolated Corpus Cavernosum Smooth Muscle  

Park, Sun-Young (Department of Physiology, College of Korean Medicine, Semyung University)
Publication Information
The Korea Journal of Herbology / v.30, no.4, 2015 , pp. 71-79 More about this Journal
Abstract
Objectives : These present study was designed to investigate the relaxation effects of Alpiniae Oxyphyllae Fructus(AOF) on isolated corpus cavernosum smooth muscle.Methods : Rabbit corpus cavernous tissues were prepared in strip. Then relaxation responses of AOF at 0.01-3 ㎎/㎖ in contracted strips induced by phenylephrine(PE) were measured. To evaluate mechanisms, indomethacin(IM) tetraethylammonium chloride(TEA), Nω-nitro-L-arginine(L-NNA), methylene blue(MB) were treated before AOF extract(0.1-3 ㎎/㎖) infused into precontracted strips induced by PE. And 1 mM Ca2+was infused into precontracted strips after pretreatment of AOF extract(3 ㎎/㎖) in Ca2+-free krebs-ringer solution. NO concentration was measured by Griess reagent system. Ratio of smooth muscles to collagen fibers and eNOS positive reaction were measured by histocheminal and immunohistochemical process.Results : The cavernous strips were significantly relaxed by AOF extract 0.1, 0.3, 1, 3 ㎎/㎖ and the pretreatment with IM 10 μM,L-NNA 100 μM, MB 10 μM inhibited relaxation of AOF compared to non-pretreatment, but the pretreatment with TEA 100 μM didn't affect relaxation of AOF. In a Ca2+-free solution, pretreatment with AOF reduced increase on contraction of strips by Ca2+supply than non-pretreatment. On HUVEC, NO concentration was increased. On corpus cavernosum of penis in Spontaneous Hypertensive Rat, ratio of smooth muscles to collagen fibers and eNOS positive reaction in AOF group were increased compared to PE groupConclusions : Taken this results, we can suggest that AOF extract exerts a relaxation effects on rabbit corpus cavernosum smooth muscle in part by suppressing influx of extracellular Ca2+throughout prostacyclin, the NO-cGMP system.
Keywords
Alpiniae Oxyphyllae Fructus; corpus cavernosum; nitric oxide; prostacyclin;
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