Oocyte growth and development in teleosts
Web1 de jul. de 2011 · Abstract. Oocyte maturation (OM) in teleosts is under precise hormonal control by progestins and estrogens. We show here that estrogens activate an epidermal growth factor receptor (Egfr) signaling pathway in fully grown, denuded zebrafish (Danio rerio) oocytes through the G protein-coupled estrogen receptor (Gper; also known as … WebWhile it is generally well accepted that the ovarian follicular sites of estradiol-17β (E2) synthesis are restricted to somatic cells, the possible contribution of the germinal …
Oocyte growth and development in teleosts
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WebThe growth and development of oocyte affect the functional activities of the surrounding somatic cells. These cells are regulated by various types of hormones, proteins, … WebThe development of both the mammalian oocyte and the somatic cell compartments of the ovarian follicle is highly coordinated; this coordination ensures that the ovulated oocyte …
WebOogenesis is the creation of an egg (also known as an ovum or oocyte) in the female foetus. Oogenesis starts in the foetus at around 7 weeks' gestation, when primordial … WebThe phases of the oocyte involved in the ovarian maturation were histologically described for five teleosts species from São Paulo coast. It was observed that the oocyte …
Web1 de fev. de 2010 · Three main types of ovarian development have been described for fish ( Wallace and Selman, 1981 ): (a) synchronous, where all oocytes develop and ovulate at … WebThe latter process, which is responsible for the preponderance of oocyte growth, includes the hepatic synthesis and secretion of vitellogenin (VTG), the uptake of VTG from the …
Web17 de nov. de 2024 · This study aimed to investigate the effects of different concentrations of N-acetylcysteine (NAC) on the growth, antrum formation, viability, and ultrastructure of …
WebStructural and functional relationships between oocytes and their envelopes were studied by means of electron microscopy in several teleost species after injection of live fish … share and transfer bookWeb13 de set. de 2024 · Oocyte growth, follicular complex formation and extracellular-matrix remodeling in ovarian maturation of the imperial zebra pleco fish Hypancistrus zebra September 2024 Scientific Reports 8(1) pool grounding requirementsWebTo assess potential differences in oocyte diameter among oocyte developmental stages, 3–5 of the most advanced stage oocytes (i.e., largest) from each fish were photographed at 1×–10× magnification using a microscope-mounted camera (Zeiss Axiocam ERc 5s or Leica IC80 HD; Carl Zeiss Microscopy LLC, White Plains, NY, USA and Leica Camera Inc., … pool grounding wire sizeWeb1 de set. de 1996 · Oocyte growth and development is an important issue in fish and fisheries biology. This paper reviews the information available on oocyte growth patterns … share and williamsWebCharacteristics Cytoplasm. Oocytes are rich in cytoplasm, which contains yolk granules to nourish the cell early in development.. Nucleus. During the primary oocyte stage of oogenesis, the nucleus is called a germinal … share and venture capitalWebWhile it is generally well accepted that the ovarian follicular sites of estradiol-17β (E2) synthesis are restricted to somatic cells, the possible contribution of the germinal compartment has received little or no attention in teleosts. In order to demonstrate the expression of ovarian aromatase in the oocyte, cyp19a1a mRNA was studied in ovarian … pool group berlinWeb14 de mai. de 2008 · Introduction. Vertebrate oocytes, which grow within the ovarian follicles, are arrested at the first meiotic prophase. In teleosts, as in other nonmammalian vertebrates, the principal events responsible for the enormous growth of oocytes are due essentially to the accumulation of yolk proteins within their cytoplasm (Devlin & … share and wep wireless