Results 121 to 130 of about 5,280,557 (249)

Acrosome reaction inactivation in sea urchin sperm

Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, 1998
Acrosome reaction inactivation (ARI) is a process that renders sperm irreversibly refractory to the egg jelly (the natural inducer of the acrosome reaction, AR). This process triggered by the egg jelly, is associated with an increase in [Ca2+]i. However, we show here that a rise in [Ca2+]i alone is not sufficient to induce ARI, since artificially ...
Guerrero, Agustı́n, Garcı́a, Lucı́a, Zapata, Otilia, Rodrı́guez, Esmeralda, Darszon, Alberto   +4 more
openaire   +2 more sources

Role of tyrosine phosphorylation in sperm capacitation / acrosome reaction

Reproductive Biology and Endocrinology, 2004
Capacitation is an important physiological pre-requisite before the sperm cell can acrosome react and fertilize the oocyte. Recent reports from several laboratories have amply documented that the protein phosphorylation especially at tyrosine residues is
Rajesh Preeti B, Naz Rajesh K
doaj   +1 more source

Effect of Nicotinic Acid on Fresh Semen Characteristics in Miniature Pigs

Journal of Animal Reproduction and Biotechnology, 2014
Objective of this study was to investigate the effect of nicotinic acid (NA) on the characteristics in fresh semen of miniature pig. We evaluated viability, acrosome reaction and mitochondrial integrity of sperm on 0, 3, 7 and 10 days during storage ...
Yeon-Ju Lee, Sang-Hee Lee, Eunsong Lee, Seung Tae Lee, Hee-Tae Cheong, Boo-Keun Yang, Seunghyung Lee, Choon-Keun Park   +7 more
doaj   +1 more source

Bicarbonate is required for migration of sperm epididymal protein DE/CRISP-1 to the equatorial segment and expression of rat sperm fusion ability [PDF]

, 2004
Numerous studies have demonstrated that sperm capacitation is a bicarbonate-dependent process. In the rat, capacitation has not been studied as much as in other species, mainly because of the difficulties in carrying out functional assays with this ...
Busso, Dolores, Cohen, Debora Juana, Cuasnicu, Patricia Sara, Da Ros, Vanina Gabriela, Marin Briggiler, Clara Isabel, Munuce, María José, Visconti, Pablo E.   +6 more
core   +1 more source

NUCB2/nesfatin-1 suppresses the acrosome reaction in sperm within the mouse epididymis. [PDF]

Anim Cells Syst (Seoul), 2023
Kim S, Sun S, Kim M, Ha J, Seok E, Yang H.   +5 more
europepmc   +1 more source

Effects of pentoxifylline treatment before freezing on motility, viability and acrosome status of poor quality human spermatozoa cryopreserved by the liquid nitrogen vapor method

Brazilian Journal of Medical and Biological Research, 2007
The objective of the present study was to investigate the effects of the direct addition of pentoxifylline (PF) to the ejaculates of men with poor sperm quality before freezing on post-thaw sperm motility, viability, acrosome integrity, and agonist ...
S.C. Esteves, D.M. Spaine, A.P. Cedenho
doaj  

The human acrosome reaction.

Asian journal of andrology, 2001
We developed tests of sperm-oocyte interaction: sperm-zona binding, zona-induced acrosome reaction, spermzona penetration and sperm-oolemma binding, using oocytes which failed to fertilise in clinical in vitro fertilization (IVF). Although oocyte defects contribute to failure of sperm oocyte interaction, rarely are all oocytes from one woman affected ...
H W, Baker, D Y, Liu, C, Garrett, M, Martic   +3 more
openaire   +1 more source

Deep Learning-Based Precision Analysis for Acrosome Reaction by Modification of Plasma Membrane in Boar Sperm. [PDF]

Animals (Basel), 2023
Park M, Yoon H, Kang BH, Lee H, An J, Lee T, Cheong HT, Lee SH.   +7 more
europepmc   +1 more source

The correlation between sperm percentage with a small acrosome and unexplained in vitro fertilization failure

BMC Pregnancy and Childbirth
Purpose Since the unexplained in vitro fertilization failure occurs frequently, it is of great importance and clinical value to identify potential underlying predictors.
Chuyan Li, Ya Ni, Lingnv Yao, Jiajie Fang, Nan Jiang, Jing Chen, Wenqin Lin, Hanchen Ni, Haiyan Zheng   +8 more
doaj   +1 more source

Elevated and Sustained Intracellular Calcium Signalling Is Necessary for Efficacious Induction of the Human Sperm Acrosome Reaction. [PDF]

Int J Mol Sci, 2022
Prajapati P, Kane S, McBrinn RC, Dean MS, Martins da Silva SJ, Brown SG.   +5 more
europepmc   +1 more source