Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"epididymal sperm"”.
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Dynamic changes of TDP-43 in testicular and epididymal sperm
… (FTLD). Our lab previously demonstrated that sperm from infertile men contains aberrant forms of TDP-43. We also characterized TDP-43 expression in the mouse testis. However, little is known about the functions of TDP-43 during sperm epididymal maturation. One in six couples worldwide …
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The Role of Estrogen Receptor Alpha in Epididymal Sperm Structure and Function
… in ERalpha (ERalphaKO mice) are infertile and sperm recovered from the cauda epididymis exhibit reduced motility and fail to fertilize eggs in vitro. These effects on sperm appear to result from defective epididymal function and not a direct effect on spermatogenesis, as ERalphaKO germ cells …
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Comparison of epididymal and ejaculated sperm collected from the same Holstein bulls
Salvaging of epididymal sperm from injured or deceased animals allows for the propagation of favorable traits from endangered or genetically superior males. Techniques developed in domestic species can also serve as the foundation for the collection, cryopreservation and utilization of epididymal …
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P450 aromatase expression in germ cells and sperm of the adult mouse and rat testis and epididymis
… interest for years. Testicular germ cells and epididymal sperm have been hypothesized to be capable of synthesizing active P450 aromatase (P450arom), the estrogen synthesizing enzyme. This investigation was undertaken to establish that testicular germ cells and epididymal sperm contain active …
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Preservation of sperm harvested from the rat, caprine, equine, and bovine epididymis
… of attention lent to the recovery of functional sperm from the epididymides of deceased males (Foote, 2000). Postmortem specimens have a finite time period before decomposition affects functionality. Determination of this “window of opportunity” to harvest and preserve epididymal sperm would be …
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Localization of P450 aromatase in sperm and estrogen receptors in the epididymal region of the rooster
The epididymal region of the rooster (rete testis, efferent ductules, and epididymal duct) has an important role in the production of fertile sperm by controlling the luminal microenvironment required for sperm maturation. Even though androgen is the major hormone involved in regulating functions …
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Effect of seminal plasma on cryopreservation and function of bovine spermatozoa
… determine the effect of seminal plasma (SP) on sperm viability parameters (estimated percent motile sperm, computer-aided percent motile sperm and percent intact acrosomes) and motion characteristics (average path velocity, VAP; curvilinear velocity, VCL; and straight line velocity, VSL) of …
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Characterization of the Genes Essential for Mouse Spermatogenesis
Spermatogenesis is a complex process that starts with the proliferation of differentiated spermatogonia through mitotic division. Primary spermatocytes produced from differentiated spermatogonia enter the prolonged prophase of meiosis during which DNA is exchanged by homologous recombination. …
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Purification and identification of sulfated Lewis X binding proteins in boar sperm
After insemination, sperm can be held in the isthmus region of the oviduct forming a reservoir. There is evidence that formation of the oviduct sperm reservoir is mediated, at least partially, by sperm recognition of carbohydrate structures present on the oviduct epithelium. In pigs, previous …
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Downregulation of reproductive homeobox gene 6 (RHOX6) interferes with male germ cell differentiation
… associated with smaller testes, reduced sperm number and motility and abnormal morphology of the epididymal sperm. To obtain a better understanding of the Rhox6 function in germ cell differentiation, we took advantage of in vitro ESC culture. ESCs can differentiate into PGCs when ESCs are …
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Effects of Quaternary Ammonium Disinfectants on Mouse Reproductive Function
… were reduced. Males exhibited declines in both sperm concentration and motility. Male reproductive toxicity was further assessed in a series of in-vitro and in-vivo experiments. ADBAC+DDAC were cytotoxic to testicular Sertoli cells in culture at concentrations greater than or equal to 0.0005%. …
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Factors causing anterior acrosomal swelling on motile bovine sperm
… ridge and anterior acrosome of motile bovine sperm was observed using differential interference contrast optics. Transmission electron microscopy indicated that the acrosomal matrix was extended into complex folds and/or projections. Outer acrosomal and plasma membrane integrity was retained. …
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Re-localization of SNARE proteins in mouse sperm prior to the acrosome reaction
… of the SNARE family, syntaxin, is found on the sperm plasma membrane while synaptobrevin, is found on the outer acrosomal membrane. During the sperm acrosome reaction, the outer acrosomal membrane fuses at hundreds of points with the overlying plasma membrane, resulting in release of the …
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Cryopreservation of Domestic Cat Epididymal Spermatozoa
… and could still effectively freeze domestic cat epididymal spermatozoa, for the purpose to sort spermatozoa into X and Y, using flow cytometry. In the first experiment we compared a TesT (Tes + Tris) 20% egg yolk extender (control) to a modified human sperm preservation medium (HSPM) and a Tris …