Results 31 to 40 of about 512 (91)

Delineation of downstream signalling components during acrosome reaction mediated by heat solubilized human zona pellucida

Reproductive Biology and Endocrinology, 2010
Background Human egg is enveloped by a glycoproteinaceous matrix, zona pellucida (ZP), responsible for binding of the human spermatozoa to the egg and induction of acrosomal exocytosis in the spermatozoon bound to ZP.
Talwar Pankaj, Bansal Pankaj, Bhandari Beena, Gupta Satish K   +3 more
doaj   +1 more source

Heat shock affects the Ca2+/calmodulin-dependent protein kinase II dynamic during bovine sperm capacitation and acrosome reaction

Frontiers in Cell and Developmental Biology
BackgroundHeat shock during sperm capacitation affects the spermatozoa quality, resulting in increased early acrosome reaction and consequently decreasing their fertilizing capacity.
Thais de Sousa Santos, Isabelle Scarpini Contrim, Daniela Franco da Silva, Mayra Elena Ortiz D’Avila Assumpção, Fabiola Freitas de Paula-Lopes, Weber Beringui Feitosa   +5 more
doaj   +1 more source

PSMA8‐Containing 20S Proteasome Regulates Spermiogenesis and Male Fertility

Advanced Science, EarlyView.
PSMA8 assembles s20S proteasome that degrades specific substrates in elongating spermatids. Degradation of s20S‐substrates activates translation of FXR1‐target mRNAs, which are essential for mitochondrial sheath formation and sperm morphogenesis.
Huiwen Cao, Qianting Zhang, Wei Xu, Anxuan Fang, Haomang Xu, Cheng Qiu, Lugeng He, Chao Yu   +7 more
wiley   +1 more source

Effect of Lepidium meyenii on in vitro fertilization via improvement in acrosome reaction and motility of mouse and human sperm

Reproductive Medicine and Biology, 2019
Purpose The direct effects of Lepidium meyenii (Maca) on sperm remain unclear. Herein, we examined the direct effect of Maca on in vitro fertilization. Methods We examined the fertilization rate in a mouse model and the rate of acrosome reaction in sperm
Yusuke Aoki, Akira Tsujimura, Yuki Nagashima, Ippei Hiramatsu, Yuka Uesaka, Taiji Nozaki, Tatsuya Ogishima, Masato Shirai, Yukihiro Shoyama, Hiromitsu Tanaka, Shigeo Horie   +10 more
doaj   +1 more source

Nitric oxide involvement in the acrosome reaction triggered by leptin in pig sperm

Reproductive Biology and Endocrinology, 2011
Background Nitric oxide (NO) is a signaling molecule produced by intracellular nitric oxide synthase (NOS) enzymes. This free radical appears to affect sperm capacitation, a maturation step preceding acrosome reaction. Recent studies have reported leptin
Guido Carmela, Giordano Francesca, Aquila Saveria, Rago Vittoria, Carpino Amalia   +4 more
doaj   +1 more source

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

The Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira, Lucas Rezende Penido Paschoal, Fernando José Zara   +2 more
wiley   +1 more source

The effect of non-traditional cooling on dog sperm cryosurvival and ability to perform the acrosome reaction

Austral Journal of Veterinary Sciences, 2019
The objective of this study was to assess cryosurvival, plasma membrane fluidity, and capability of cryopreserved dog (Canis lupus familiaris) spermatozoa, cooled to –5 °C before freezing, to perform the acrosome reaction under the effect of progesterone
Luis D. Ortega-Morales, Alicia Alcantar-Rodriguez, Maria C. Espejel, Alfredo Medrano   +3 more
doaj   +1 more source

Oocyte–cumulus cell interaction: a key factor in early embryo development

Biological Reviews, EarlyView.
ABSTRACT The evaluation of oocyte competence is a fundamental step in achieving successful outcomes following assisted reproduction techniques (ART). At present, however, conventional oocyte maturation assessment is carried out by morphological observation, which is a subjective method that does not consider molecular features.
Marc Torres‐Garrido, Marc Yeste, Yentel Mateo‐Otero   +2 more
wiley   +1 more source

Characterization of expression patterns and dynamic relocation of Notch proteins during acrosome reaction of bull spermatozoa

Scientific Reports
Notch is a conserved cell-signaling pathway involved in spermatogenesis regulation. This study firstly evaluated the presence, localization patterns, acquisition origin and relation to acrosome reaction of Notch proteins in bull sperm.
Patrícia Diniz, Inês Leites, Mariana R. Batista, Ana Catarina Torres, Luísa Mateus, Luís Lopes-da-Costa, Elisabete Silva   +6 more
doaj   +1 more source

Dose-response effects of estrogenic mycotoxins (zearalenone, alpha- and beta-zearalenol) on motility, hyperactivation and the acrosome reaction of stallion sperm

Reproductive Biology and Endocrinology, 2011
Background The aim of this study was to investigate the in vitro effects of the Fusarium fungus-derived mycotoxin, zearalenone and its derivatives alpha-zearalenol and beta-zearalenol on motility parameters and the acrosome reaction of stallion sperm ...
Colenbrander Ben, Pizzi Flavia, Sostaric Edita, Gadella Bart M, Stout Tom AE, Filannino Angela, Dell'Aquila Maria, Minervini Fiorenza   +7 more
doaj   +1 more source