نتایج جستجو برای: bovine ovary
تعداد نتایج: 116903 فیلتر نتایج به سال:
Recent studies have suggested a paracrine role for several fibroblast growth factors (FGFs) in the regulation of follicle and luteal development. Fgf13 is a non-secreted FGF that has been previously localized to the developing gonads, but it is not known if it is expressed in the adult ovary. The objective of the present study was to determine the expression pattern of Fgf13 mRNA in the bovine ...
The posttranscriptional gene regulation mediated by microRNA plays an important role in the development and function of male and female reproductive organs and germ cells in mammals, including cattle. In the present study, we identified novel and differentially expressed miRNAs in the testis and ovary in Holstein cattle by combining the Solexa sequencing with bioinformatics. In total 100 and 10...
Fibrillins 1-3 are stromal extracellular matrix proteins that play important roles in regulating TGFβ activity, which stimulates fibroblasts to proliferate and synthesize collagen. In the developing ovary, the action of stroma is initially necessary for the formation of ovigerous cords and subsequently for the formation of follicles and the surface epithelium of the ovary. FBN3 is highly expres...
Interactions between mesenchymal-derived thecal cells and epithelial-derived granulosa cells are essential for follicular development in the ovary. These mesenchymal-epithelial cell interactions are in part mediated by keratinocyte growth factor (KGF), hepatocyte growth factor (HGF), and Kit ligand (KL). This study investigates the hypothesis that thecal cell-derived growth factors (e.g. KGF an...
Although many aspects of ovarian differentiation have been established, comparatively little is known about prenatal follicle formation and differentiation of bovine ovaries. The objective of this investigation was to study the role of the surface epithelium during the development of germ cell nests, germ cell cords and follicle formation in the fetal bovine ovary. Associated important prolifer...
Fertility in mammals is dependant on females having an adequate primordial follicle pool to supply oocytes for fertilization. The formation of primordial follicles is called ovarian follicular assembly. In rats and mice progesterone and estradiol have been shown to inhibit follicle assembly with assembly occurring after birth when the pups are removed from the high-steroid maternal environment....
BACKGROUND Cryopreservation and subsequent reimplantation of intact ovaries from cancer patients, offers potentially the best prognosis for restoring fertility after sterilizing cancer treatment. We used bovine ovaries as a model system to explore the perfusion procedure that is required for cryopreservation of intact ovaries. METHODS The arteria ovarica was cannuled, and ovaries were flushed...
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