کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2075101 1544828 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Timing of prostaglandin F2α release episodes and oxytocin receptor development during luteolysis in the cow
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Timing of prostaglandin F2α release episodes and oxytocin receptor development during luteolysis in the cow
چکیده انگلیسی

The timing of PGF2α release and the timing and extent of the rise in endometrial oxytocin receptors was determined in relation to the timing of the progesterone fall during luteolysis in cycling cows. In cows undergoing luteolysis (n = 6), measurement of PGF2α metabolite in hourly plasma samples collected during daily 10 h sampling periods identified a total of 2.2 ± 0.5 PGF2α release episodes per animal, each of 4.0 ± 0.4 h duration. In cows in which luteolysis was not observed (n = 4) no PGF2α release episodes were identified. In a further three cows in which additional repeated uterine biopsies were collected on days 15, 17, 19, 21 and 23, endometrial oxytocin receptors were initially undetectable (<15 fmol/mg protein) but had increased to 120 ± 19 fmol/mg protein prior to the initiation of PGF2α release episodes. Receptor concentrations then continued to increase reaching peak concentrations of 651 ± 142 after luteolysis had been completed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 93, Issues 3–4, July 2006, Pages 328–336
نویسندگان
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