Results 31 to 40 of about 134,084 (212)
Bio-Protocol, 2021 Mammalian sperm cells are not capable of fertilizing an egg immediately after ejaculation; instead, they must gradually acquire the capacity to fertilize while they travel inside the female reproductive tract.
Lukas Ded, Jean- Chung
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Patch clamp studies of human sperm under physiological ionic conditions reveal three functionally and pharmacologically distinct cation channels [PDF]
, 2014 Whilst fertilizing capacity depends upon a K+ conductance G? that allows the spermatozoon membrane potential Vm to be held at a negative value, the characteristics of this conductance in human sperm are virtually unknown.
Barratt, C.L.R.; id_orcid +8 more
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Cells, 2021 Capacitation drives sperm biophysical and biochemical changes for sperm-oocyte interactions. It is a well-known fact that the molecular complex arylsulfatase A (ARSA), hyaluronidase sperm adhesion molecule 1 (SPAM1), and heat shock protein 2 (HSPA2 ...
María José Gómez-Torres +6 more
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Expression of cystatin C in the female reproductive tract and its effect on human sperm capacitation
Reproductive Biology and Endocrinology, 2018 Background Cystatin C (CST3), a cysteine protease inhibitor in seminal plasma, is expressed in animal uteri. However, its expression in the human female reproductive tract and its effect on human sperm capacitation are unclear.
Robert Kuo-Kuang Lee +7 more
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Effect of Astaxanthin on Human Sperm Capacitation [PDF]
Marine Drugs, 2013 In order to be able to fertilize oocytes, human sperm must undergo a series of morphological and structural alterations, known as capacitation. It has been shown that the production of endogenous sperm reactive oxygen species (ROS) plays a key role in causing cells to undergo a massive acrosome reaction (AR).
DONA', GABRIELLA +9 more
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Studies on the sperm reservoir of the pig oviduct [PDF]
, 2003 During sperm transport in the female pig a proportion of spermatozoa are arrested, often for 24 h or more, in a particular segment of the utero-tubal junction (UTJ) and the adjacent tubal isthmus, where a sperm reservoir (SR) is built up.
Tienthai, Paisan
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Biology, 2021 This work sought to address whether the presence of exogenous bicarbonate is required for pig sperm to elicit in vitro capacitation and further progesterone-induced acrosome exocytosis. For this purpose, sperm were either incubated in a standard in vitro
Bruna Resende Chaves +7 more
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Molecular Basis of Human Sperm Capacitation [PDF]
Frontiers in Cell and Developmental Biology, 2018 In the early 1950s, Austin and Chang independently described the changes that are required for the sperm to fertilize oocytes in vivo. These changes were originally grouped under name of "capacitation" and were the first step in the development of in vitro fertilization (IVF) in humans.
Puga Molina, Lis del Carmen +5 more
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Specific lectin binding sites during in vitro capacitation and acrosome reaction in boar spermatozoa
Italian Journal of Animal Science, 2021 Sperm glycocalyx and plasma membrane undergo outstanding modifications during fertilization. However, it is unclear how in vitro capacitation time and acrosome reaction affect the specific location of boar sperm glycoconjugates.
Laura Robles-Gómez +6 more
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STUDIES ON SPERM CAPACITATION [PDF]
Reproduction, 1973 Summary. During incubation of guinea-pig spermatozoa in Ca-free Krebs—Ringer phosphate buffer, substances were released into the medium which were subsequently separated on Sephadex G-200 into two major fractions, Fr. I and Fr. II. The macromolecular Fr. I increased with sperm maturation and the fraction was shown to
S. AONUMA +5 more
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