The effect of sub-chronic systemic ethanol treatment on corpus cavernosal smooth muscle contraction: the contribution of RhoA/Rho-kinase
Yükleniyor...
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The aim of this study was to evaluate whether the sub-chronic systemic ethanol exposure has direct effect on cavernosal smooth muscle contractions induced by KCl (depolarizing) and phenylephrine (alpha(1)-receptor agonist), and the possible involvement of RhoA/Rho-kinase pathway. Sub-chronic systemic ethanol was applied to mice with inhalation route for 14 days. The blood levels in ethanol-treated mice averaged 121.2 +/- 9.1 mg/dl. KCl (80 mM) and phenylephrine (10 nM-100 mu M) induced sustained contractions in corpus corporal strips from sham-treated mice. Sub-chronic ethanol treatment reduced the contractions to KCl. However, phenylephrine-induced contractions were not affected by ethanol treatment. Rho-kinase inhibitor fasudil (50 mu M) and Y-27632 (50 mu M) inhibited contractions to KCl and phenylephrine in sham-treated mice. Ethanol treatment increased the inhibitory effect of Rho-kinase inhibitors on contractions to phenylephrine. The relaxations induced by fasudil (100 mu M) and Y-27632 (500 mu M) did not change in ethanol treatment group. In ethanol-treated group, the expression of RhoA decreased compared to sham-treated group. Also, ROCK1 expression was reduced by ethanol but not statically significant to sham-treated group; however, the expression of ROCK2 increased in ethanol group. From these findings, it seems that phenylephrine and KCl-induced contractions depends on RhoA/Rho-kinase-mediated Ca2+ sensitization. Also, these results suggest that the ethanol treatment decreased the expression of RhoA, and the inhibitory effect of ethanol on KCl-induced contractions may be due to, at least in part, the inhibition of a RhoA/Rho-kinase in mouse corpus cavernosum.
Açıklama
Anahtar Kelimeler
Ethanol, KCl, Phenylephrine, RhoA/Rho-Kinase, Mouse Corpus Cavernosum
Kaynak
Naunyn-Schmiedebergs Archives Of Pharmacology
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
389
Sayı
3