کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10892886 1082121 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Endocrine profiles of somatic nuclear transfer-derived pregnancies in dairy cattle
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Endocrine profiles of somatic nuclear transfer-derived pregnancies in dairy cattle
چکیده انگلیسی
In cattle, several hormones and proteins are necessary for maintenance of a normal pregnancy that will result in a viable calf. Deviation from the normal cascade or expected profile of reproductive hormones and proteins may be associated with impairment of somatic nuclear transfer-derived pregnancies and the high rate of fetal loss. The objectives of this study were to characterize maternal plasma concentrations of pregnancy-specific protein B (PSPB), progesterone (P4), estrone sulphate (E1S), and estradiol (E2) during the last two-thirds of pregnancy (cloned calves), and to determine associations with gestational abnormalities. Cows with cloned fetuses, produced by either commercial (N = 16) or zona-free (N = 4) cloning techniques, were compared with pregnant animals derived from traditional embryo transfer (N = 6) or AI (N = 6), at various stages of gestation (Days 80, 120, 150, 180, 210, and 240; Day 0 = estrus). Fetal well-being was monitored with ultrasonography throughout gestation. At Day 80, progesterone concentration was lower (P < 0.0001) in nuclear transfer (NT) recipients than in control groups. Mean estrone sulphate concentrations did not vary significantly between NT and control groups. At Day 150, pregnancy-specific protein B concentrations were elevated (P < 0.002) in NT cows. Estradiol concentration was higher in NT recipients than control cows throughout the study period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theriogenology - Volume 76, Issue 5, 15 September 2011, Pages 911-920
نویسندگان
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