Results 181 to 190 of about 21,661 (226)

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

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 evaluated by the
BARBONI, Barbara, MATTIOLI, Mauro, SEREN E.   +2 more
openaire   +2 more sources

Effect of exogenous sperm capacitation inducers on stallion sperm

Theriogenology
Although 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, Maria Jose Contreras, Camila Arroyo-Salvo, Paulina Cabrera P, Mauricio Silva, Osvaldo Merino, Maria Elena Arias, Ricardo Felmer   +7 more
openaire   +2 more sources

Capacitation-Associated Glycocomponents of Mammalian Sperm

Reproductive Sciences, 2016
Mammalian fertilization is a series of events that are mostly carbohydrate mediated. The male gamete glycocomponents are extensively synthesized and modified during sperm development and sperm transport in the reproductive tracts. Freshly ejaculated mammalian sperm are required to undergo capacitation, which takes place in the female reproductive ...
openaire   +2 more sources

Influence of the Oviduct on Sperm Capacitation in the Rabbit ,

Fertility and Sterility, 1970
In an effort to evaluate the influence of the oviduct on sperm capacitation in vitro fertilization of freshly-ovulated rabbit ova was used to assay the fertilizing ability of spermatozoa. New Zealand white rabbits were used. 9 1/2 hours after injection of human chorionic gonadotrophin half the animals had fimbriae of both tubes resected; 2 hours ...
H M, Seitz, G, Rocha, B G, Brackett, L, Mastroianni   +3 more
openaire   +2 more sources

The influence of fluorides on mouse sperm capacitation

Animal Reproduction Science, 2008
Increasing infertility, due to pathological changes on sperm, has become a serious issue. Eco-toxicological effect of rising concentration of fluorides can be enhanced in the presence of aluminium ions by forming fluorometallic complexes, analogues of phosphate groups that interfere with the activity of G-proteins and P-type ATPases, which are part of ...
K, Dvoráková-Hortová, M, Sandera, M, Jursová, J, Vasinová, J, Peknicová   +4 more
openaire   +2 more sources

[Advances in sperm capacitation].

Zhonghua nan ke xue = National journal of andrology, 2003
Sperm must be capacitated before sperm-ovum fusion. Capacitation was once considered as hyperactivation. But now many investigators thought that capacitation wasn't equal to hyperactivation, and that sperm hyperactivation might be a moiety of capacitation or the result of capacitation.
Jin-Chun, Lu, Fu-Quan, Zhang, Yu-Feng, Huang, Xi-Ran, Zhang   +3 more
openaire   +1 more source