کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2552457 1560688 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving the relaxing effect of terbutaline with phosphodiesterase inhibitors: Studies on pregnant rat uteri in vitro
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Improving the relaxing effect of terbutaline with phosphodiesterase inhibitors: Studies on pregnant rat uteri in vitro
چکیده انگلیسی

AimsPrevious results by our group showed that the in vitro uterus-relaxing potency of β2-adrenergic receptor (β2-AR) agonists and uterine cAMP accumulation are enhanced in case of visceral inflammation. Our aim was to study the effects of the non-selective phosphodiesterase (PDE) inhibitor theophylline and the selective PDE4 inhibitor rolipram on the uteri of intact late-pregnant female rats (on days 20 and 22 of pregnancy) and of pregnant rats treated with lipopolysaccharide (LPS) to evoke preterm labor (on day 20).Main methodsThe effects of theophylline and rolipram alone and of rolipram with terbutaline were investigated in isolated organ system. Contractions were evoked with KCl. The forskolin- and terbutaline-stimulated cAMP accumulations were determined by enzyme immunoassay, with or without rolipram.Key findingsThe maximum uterus-relaxing effects of theophylline and rolipram decreased significantly (p < 0.05) with the progression of pregnancy in intact rats. The most pronounced effect of rolipram was detected in rats challenged with LPS on day 20. Rolipram increased the in vitro effect of terbutaline both in intact and in LPS-treated rats. In the presence of rolipram, the forskolin- and terbutaline-stimulated cAMP accumulations were higher in LPS-treated than in intact rats.SignificanceThe previous findings led us to conclude that the combined administration of PDE4 inhibitors with β2-agonists is of therapeutic value for the inhibition for uterine contractions, especially in the case of genital inflammation, which often triggers preterm birth. Combination therapy in general is associated with lesser side-effects, as a consequence of lower effective doses of each drug.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Life Sciences - Volume 87, Issues 23–26, 18 December 2010, Pages 733–737
نویسندگان
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