Zona Pellucida
In Vitro Fertilization Outcomes Following Assisted Hatching of Embryos with Thick Zona Pellucida—A Prospective Randomized Study
... A key event for successful embryo implantation is the expansion and thinning of the zona pellucida (ZP) and em- bryonic hatching [1]. One of the suggested explanations for impaired hatching, which may ...
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Porcine zona pellucida vaccine immunocontraception of African elephant (Loxodonta africana) cows: A review of 22 years of research
... Department of Agriculture, Forestry, Fisheries [DAFF] in South Africa). The final product consists of solubilised zona pellucida proteins with a given concentration (Dunbar, Waldrip & Hendrik ...
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Effects of human menopausal gonadotropin on zona pellucida and pregnancy outcomes of ovarian stimulation protocols
... in zona pellucida, although Gordon et al found that residual endogenous LH after down regulation is sufficient for normal ovarian response and estradiol synthesis and implantation is possibly higher when LH ...
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In vivo interaction of antibodies with cell surface antigens A mechanism responsible for in situ formation of immune deposits in the zona pellucida of rabbit oocytes
... adjacent zona pellucida through a mechanism of "patching" and "shedding" of immune complexes, similar to that occurring in in vitro systems characterized by interaction of plasma ...
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Association of egg zona pellucida glycoprotein mZP3 with sperm protein sp56 during fertilization in mice
... ABSTRACT Purified mouse sperm receptor, a zona pellucida glycoprotein called mZP3, binds to plasma membrane overlying acrosome-intact sperm heads (P.M. Wassarman, 1999, Cell 96, 175- 183). Some evidence ...
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Anti-zona pellucida antibodies in infertile patients in relation to multiple puncture of ovaries and unexplained infertility
... of zona pellucida antibodies in 250 women with recurrent IVF failures (from 1 to 4 times) with the results of a control group of 211 unexplained infertile women that were never treated by ...of zona ...
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Application of a zona pellucida binding assay (ZBA) in the domestic cat benefits from the use of in vitro matured oocytes
... the zona pellucida binding assay (ZBA), together with tests used to investigate the penetration of the zona pellucida (ZP) and in vitro fertilisation (IVF), are able to test for several ...
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Anuran and pig egg zona pellucida glycoproteins in fertilization and early development
... Hedrick4b pm Anuran and pig egg zona pellucida glycoproteins in fertilization and early development JERRY L HEDRICK* Department of Animal Science, University of California, Davis, CA, USA ABSTRACT The[.] ...
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Delineation of downstream signalling components during acrosome reaction mediated by heat solubilized human zona pellucida
... Zona pellucida (ZP), a glycoproteinaceous matrix that surrounds the mammalian oocyte, plays an important role in species-specific binding of the spermatozoon to the oocyte, induction of acrosomal exocytosis ...
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Estimating zona pellucida hardness under microinjection to assess oocyte/embryo quality: Analytical and experimental studies
... The precise determination of zona pellucida (ZP) hardness is largely unknown due to the lack of ap- propriate measuring and modelling methods. In this study, we have used experimental and theoretical models ...
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Ovarian function and pregnancy outcome in pony mares following immunocontraception with native and recombinant porcine zona pellucida vaccines
... Body-weight (kg) at week 1 416 (360, 503) 396 (329, 433) 436 (360, 473) 0.2 Body-weight (kg) at week 8 396 (352, 495) 405 (333, 433) 405 (361, 433) 0.6 Body-weight (kg) at week 24 435 (382, 515) 439 (359, 467) 445 (369, ...
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Does women’s age influence zona pellucida birefringence of metaphase ΙΙ oocytes in in-vitro maturation program?
... Background: In vitro maturation (IVM) is a promising treatment option for certain infertile women. Nowadays, with the aid of PolScope, it has become possible to evaluate zona pellucida (ZP) characteristics ...
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Autoimmune disease of the ovary induced by a ZP3 peptide from the mouse zona pellucida
... the zona pellucida that surrounds growing and mature ...the zona pellucida ...the zona pellucida are conserved among mammals (the mouse and human ZP3 proteins are 67% identical), ...
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Oocyte zona pellucida dysmorphology is associated with diminished in-vitro fertilization success
... It is unclear why ZP dysmorphology may impair oocyte function however one possible theory is that ZP dymorphology is a marker for poorer oocyte quality related to endometriosis. Studies have shown endometriosis patients ...
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Mammalian fertilization:the egg’s multifunctional zona pellucida
... ABSTRACT The zona pellucida (ZP) is a specialized extracellular coat that surrounds the plasma membrane of mammalian eggs. Its presence is essential for successful completion of oogenesis, fertilization and ...
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An Ultrastructural Study of the Antioxidant Effects of Vitamin E and Fennel Extract on Zona Pellucida Cell Changes of Rat Ovaries under Non-Ionizing 50Hz Electromagnetic Fields
... radiation, zona pellucida had lost their microvilli, mitochondria had lost their crystal structure, vacuoles were formed on the surface of the ovary cells, and watery swellings were detected on the cell ...
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Expression of Genes Encoding Zona Pellucida Glycoproteins and Cortical Granule Distribution in Porcine Oocytes Isolated from Small and Medium Follicles in Relation to Puberty Status of Donors
... the zona pellucida structure, also called the zona reaction (Sun ...of zona pellucida proteins in normal and knockout animal models are well recognized, the expression of ZPs in porcine ...
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Influence of the zona pellucida of the mouse egg on folliculogenesis and fertility
... have several regions in common, suggesting that they may be derived from a common ancestral gene. Nascent mZP1-3 are synthesized as precursor polypeptides that have an N-terminal signal-sequence that directs nascent ...
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Sperm penetration through cumulus mass and zona pellucida
... the zona pellucida (ZP), an extracellular glycoprotein coat surrounding the egg, acrosome exocytosis, sperm penetration through the ZP, and fusion between sperm and egg (Yanagimachi, 1994; Snell and White, ...
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Sperm binding to the zona pellucida is not sufficient to induce acrosome exocytosis
... the zona matrix might trigger a mechanosensory signal transduction, leading to exocytosis, and account for the presence of only acrosome-reacted sperm in the perivitelline ...with zona pellucida ...
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