Results 161 to 170 of about 134,084 (212)
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Role of the oviduct in sperm capacitation
Theriogenology, 2007Following insemination of spermatozoa pre-ovulation, the mammalian oviduct ensures, by the formation of a functional sperm reservoir (SR), that suitable (low) numbers of viable and potentially fertile spermatozoa are available for fertilization at the ampullary isthmic junction (AIJ).
Heriberto Rodríguez-Martínez
exaly +3 more sources
Sperm capacitation in the porcine oviduct
Animal Reproduction Science, 2004In vitro studies suggests that sperm capacitation occurs in the sperm reservoir (SR) of the pig, with spermatozoa progressing towards the ampullary-isthmic junction (AIJ) around ovulation as a consequence of capacitation/hyperactivation. In contrast, in vivo studies are scarce.
Paisan Tienthai +2 more
exaly +3 more sources
Potential assays for sperm capacitation in mammals
American Journal of Physiology-Cell Physiology, 1994 Sperm capacitation is an essential process in fertilization. It apparently involves a large number of processes, the common denominator of which is that they donate to sperm the potential to undergo the acrosome reaction, i.e., to release proteolytic enzymes enabling sperm penetration through the egg coat.
A, Cohen-Dayag, M, Eisenbach
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Effect of exogenous sperm capacitation inducers on stallion sperm
TheriogenologyAlthough under appropriate laboratory conditions, sperm from different mammalian species can be capacitated in vitro, the optimal conditions for sperm capacitation in the stallion have been elusive. This study evaluated the effect of different capacitating inducers in Whitten and Tyrode media and assessed their impact on capacitation-related factors ...
Fernanda Fuentes +7 more
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Influence of progesterone on boar sperm capacitation
Journal of Endocrinology, 1995 Abstract This research investigates the effect of progesterone (P4) on boar sperm capacitation. Ejaculated spermatozoa were washed and incubated under capacitating conditions with or without P4. At different times of incubation samples of sperm were exposed to solubilized zonae pellucidae (ZP) and the degree of capacitation was ...
BARBONI, Barbara +2 more
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Nature, 1970
THE capacitation of spermatozoa is established as a prerequisite to fertilization in mammals1,2. Presumably the sperm undergoes some morphological or physiological change (or both) while in contact with female reproductive tissues, and it is only after this “capacitation” that the mammalian sperm can make contact with and penetrate the egg surface3–5 ...
C A, Shivers, J M, James
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THE capacitation of spermatozoa is established as a prerequisite to fertilization in mammals1,2. Presumably the sperm undergoes some morphological or physiological change (or both) while in contact with female reproductive tissues, and it is only after this “capacitation” that the mammalian sperm can make contact with and penetrate the egg surface3–5 ...
C A, Shivers, J M, James
openaire +2 more sources
The sperm proteasome during sperm capacitation and fertilization
Journal of Reproductive Immunology, 2009The 26S proteasome is a multi-subunit protease specifically targeting ubiquitinated proteins. A consensus has emerged from studies by multiple laboratories on the role of sperm-borne proteasomes in human, mouse, pig, bovine, ascidian and echinoderm fertilization.
Shawn, Zimmerman, Peter, Sutovsky
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The ‘Capacitation’ of the Mammalian Sperm
Nature, 1952IT was shown recently1 that sperms injected into the periovarian sac of the rat after ovulation did not begin to enter the eggs until four or five hours later. In the rabbit, too, sperms introduced into the Fallopian tubes shortly after ovulation seldom penetrated the eggs; but if sperms Were introduced a few hours before ovulation, the majority of the
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Requirements for Capacitation of Rabbit Sperm
Nature, 1968THE need for capacitation of rabbit sperm has been well documented1–3, but the requirements for the production of this phenomenon are still unclear. Capacitation has not been achieved in vitro in a defined media, and partial Capacitation occurs in uterine fluid and beta-amylase solutions4.
C E, Hamner, N J, Sojka
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Sperm Capacitation and Acrosome Reaction in Mammalian Sperm
2016Physiological changes that endow mammalian sperm with fertilizing capacity are known as sperm capacitation. As part of capacitation, sperm develop an asymmetrical flagellar beating known as hyperactivation and acquire the ability to undergo the acrosome reaction. Together, these processes promote fertilizing competence in sperm. At the molecular level,
Cintia, Stival +5 more
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