Results 61 to 70 of about 13,944 (183)

Capacitation of mouse sperm is modulated by gamma-aminobutyric acid (GABA) concentration

The Journal of Reproduction and Development, 2019
In mammals, ejaculated sperm acquire their fertilizing ability during migration through the female reproductive tract, which secretes several factors that contribute to sperm capacitation.
Shouhei KURATA, Yuuki HIRADATE, Kohei UMEZU, Kenshiro HARA, Kentaro TANEMURA   +4 more
doaj   +1 more source

GSK3α‐mediated regulation of the RNA demethylase fat mass and obesity‐associated protein (FTO) during murine spermatogenesis

The FEBS Journal, EarlyView.
FTO regulates mRNA stability and translational efficiency through its m6A‐demethylation activity. GSK3 functions as an upstream regulator of FTO, leading to its inhibition via phosphorylation. In male germ cells, FTO activity is kept in check by GSK3α.
Neha Choudhari, Budheswar Dehury, Rounak Roy, Radhakrishnan Periyasamy, Indrashis Bhattacharya, Mahesh Sahare, Srinivasan Vijayraghavan, Souvik Dey   +7 more
wiley   +1 more source

Possible Role of N-Methyl-D-Aspartate Glutamate Receptors in The Induction of Acrosome Reaction in Human Sperm [PDF]

Cell Journal
Objective: Acrosome reaction is a receptor and Ca2+-dependent process. N-Methyl-D- aspartate (NMDA) glutamatereceptors are expressed in the human sperm and are involved in the Ca2+ influx.
Hamid Reza Momeni, Elham Farjad, Abolghasem Naiemi, Tahereh Etemadi, Mohammad Hussein Abnosi, Niloufar Darbandi   +5 more
doaj   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Acrosome reaction in morphologically different types of human spermatozoa

Zdravniški Vestnik, 2011
Background: The aim of our study was to ascertain if the acrosome functionality differs between various morphological types of spermatozoa in human. Methods: Fourteen ejaculates were resuspended in the culture medium with the aim to wash the spermatozoa ...
Mojca Čižek Sajko, Borut Kovačič, Veljko Vlaisavljević   +2 more
doaj  

STUDIES ON THE ACROSOME. II. ACROSOME REACTION IN STARFISH SPERMATOZOA

The Biological Bulletin, 1954
1. When the spermatozoa of three starfish species, Asterina pectinifera, Asterias amurensis and Astropecten scoparius, are suspended in a dilute (0.1-1.0%) solution of egg albumin in sea water and mixed with homologous egg-water, three effects can be noted:a. many of the spermatozoa are agglutinated by their heads, forming permanent clusters;b.
Dan, Jean Clark, Kitahara, A, Kohri, T
openaire   +3 more sources

TMEM16A chloride channels in the female reproductive tract and their role in normal and dysfunctional pregnancy and labour

The Journal of Physiology, EarlyView.
Abstract figure legend TMEM16A plays a pivotal role in setting the duration of the action potential plateau in human uterine smooth muscle. An increase in TMEM16A expression in labour underpins a lengthening of the plateau and this provides time for the contraction to become larger and longer, important for timely successful labour.
Helena C. Parkington, Harold A. Coleman, Penelope M. Sheehan, Shaun P. Brennecke, Marianne Tare   +4 more
wiley   +1 more source

The Therapeutic Effects of Crocus sativus L. and Its Constituents on the Improving Treatment of Azoospermia: A Narrative Review

Health Science Reports, Volume 9, Issue 9, September 2026.
ABSTRACT Background and Aims Azoospermia, defined as the complete absence of sperm in the ejaculate, is a major cause of male infertility and is classified into obstructive and non‐obstructive forms. While obstructive azoospermia is primarily mechanical in origin, non‐obstructive azoospermia (NOA) is characterized by impaired spermatogenesis and is ...
Faraz Khakshour, Melika Hadad Tehran, Jamal Jalili Shahri, Farid Zeynali, Fahimeh Lavi Arab   +4 more
wiley   +1 more source

Dose‐Dependent Effects of Clinoptilolite Supplementation on Sperm Quality and Oxidative Stress During Canine Semen Cryopreservation

Veterinary Medicine and Science, Volume 12, Issue 5, September 2026.
Clinoptilolite supplementation in canine semen extenders showed dose‐dependent effects during cryopreservation, with 2% yielding optimal post‐thaw sperm quality. Higher concentrations impaired sperm parameters, likely due to oxidative imbalance, highlighting the importance of precise dosing to enhance cryosurvival.
Nurdan Coşkun, Fikret Karaca
wiley   +1 more source

Prostasome-like vesicles stimulate acrosome reaction of pig spermatozoa

Reproductive Biology and Endocrinology, 2008
Background The presence of small membranous particles characterizes the male genital fluids of different mammalian species. The influence of semen vesicles, denominated prostasomes, on sperm functional properties has been well documented in humans, but ...
Marcianò Vito, Siciliano Laura, Carpino Amalia   +2 more
doaj   +1 more source