Abstract:
:Our purpose was to verify if alcohol causes alterations on translocation of Ca(2+) and tension induced by KCl or noradrenaline in vas deferens of periadolescent Wistar rats. A single dose of alcohol (i.p. 3.0g/kg) or saline as control, was given 4h before sacrifice. Longitudinal strips of prostatic portion were mounted in vitro for simultaneous measurements of intracellular Ca(2+) and contractions. Fluorescence and tension were measured in strips loaded with the fluorescent dye fura-2. The mean values (±S.E.M.) of fluorescence ratios (F340/380) evoked by KCl were significantly lower by about 70% after alcohol, in relation to control. It was about 50% lower when evoked by noradrenaline. In relation to tension, the respective mean values (±S.E.M.) were lower by about 60% in organs treated with KCl or by about 80% after noradrenaline. In some experiments, before noradrenaline contraction, the vas deferens was incubated with verapamil 10(-6)M for 30min. In these experiments, contractions by noradrenaline in the presence of verapamil were decreased by about 70% by alcohol. Alcohol decreases cytosolic calcium and contractility after KCl and noradrenaline, as compared with controls. In addition, alcohol promoted damage of lumen structures. Prostatic portion showed no striking morphometric change after treatment, but the number of TUNEL positive cells in muscular layer, basal lamina and lumen were increased by alcohol, indicating apoptosis, compared with controls. This investigation shows that alcohol treatment alters signaling of calcium which in turn compromises the contraction associated with a process of apoptosis of periadolescent rats.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ferreira Verde L,Silva Lopes G,Miki Ihara SS,Hyppolito Jurkiewicz N,Jurkiewicz Adoi
10.1016/j.ejphar.2014.04.009subject
Has Abstractpub_date
2014-07-15 00:00:00pages
211-8eissn
0014-2999issn
1879-0712pii
S0014-2999(14)00289-1journal_volume
735pub_type
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