Results 131 to 140 of about 12,113 (180)

Sperm capacitation in the porcine oviduct

Animal Reproduction Science, 2004
In 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, Anders Johannisson, Heriberto Rodríguez-Martínez   +2 more
exaly   +3 more sources

The sperm proteasome during sperm capacitation and fertilization

Journal of Reproductive Immunology, 2009
The 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
openaire   +2 more sources

The ‘Capacitation’ of the Mammalian Sperm

Nature, 1952
IT 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
openaire   +2 more sources

Requirements for Capacitation of Rabbit Sperm

Nature, 1968
THE 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
openaire   +2 more sources

Sperm Capacitation and Acrosome Reaction in Mammalian Sperm

2016
Physiological 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, Lis del C, Puga Molina, Bidur, Paudel, Mariano G, Buffone, Pablo E, Visconti, Dario, Krapf   +5 more
openaire   +2 more sources

Factors Regulating Sperm Capacitation

Systems Biology in Reproductive Medicine, 2010
Capacitation is broadly defined as the functional modifications rendering sperm competent to fertilize, encompassing the ability of the sperm to bind the zona pellucida and subsequently undergo the acrosome reaction, hyperactivated motility, and the capacity to fuse with the oocyte.
openaire   +2 more sources

Capacitation and the acrosome reaction in equine sperm

Animal Reproduction Science, 2001
During sexual reproduction, the sperm and oocyte must fuse before the production of a diploid zygote can proceed. In mammals such as equids, fusion depends critically on complex changes in the plasma membrane of the sperm and, not surprisingly, this membrane differs markedly from that of somatic cells.
Gadella, B.M., Rathi, R., Brouwers, J.F.H.M., Stout, T.A.E., Colenbrander, B.A.   +4 more
openaire   +3 more sources

The role of mitochondrial proteins in sperm capacitation

Journal of Reproductive Immunology, 2009
Spermatozoa deposited in the female reproductive tract need to undergo a multifaceted maturation process prior to fertilization termed "capacitation". This process is regulated by several proteins which are compartmentalized in discrete domains of the spermatozoon including the head, the mid-piece and the principal piece.
S, Shivaji, Venkatesh, Kota, Archana B, Siva   +2 more
openaire   +2 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
openaire   +2 more sources

Sperm capacitation in vitro in the eld's deer

Theriogenology, 2001
Sperm capacitation was examined in the endangered Eld's deer (Cervus eldi thamin). Sperm motility and viability (percentage of sperm cells with intact membranes) were assessed in vitro over time after attempting to induce capacitation in TALP alone and TALP supplemented with calcium (10 mM CaCl2), dibutyryl cAMP (1 mM dbcAMP), or fetal calf serum (20 ...
V K, Harnal, R, Spindler, S L, Monfort, B, Pukazhenthi, D M, Bird, D E, Wildt   +5 more
openaire   +2 more sources