Results 81 to 90 of about 2,059,461 (220)

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

Sperm Ecto-Protein Kinase and Its Protein Substrate: Novel Regulators of Membrane Fusion During Acrosome Reaction

, 2009
Previously we have purified and characterized a unique plasma membrane-specific cyclic AMP-independent ecto-protein kinase (ecto-CIK) as well as its ecto-phosphoprotein substrate (MPS) using caprine sperm model. This study reports for the first time the
Majumder, Gopal Chandra, Arunima Maiti, Debjani Nath, Maiti, Arunima, Dungdung, Sandhya Rekha, Nath, Debjani, Sandhya R. Dungdung, Gopal C. Majumder   +7 more
core   +1 more source

Potentially Toxic Elements and Male Reproductive Toxicity: Mechanisms, Implications, and Protective Strategies: A Narrative Review

Journal of Biochemical and Molecular Toxicology, Volume 40, Issue 10, October 2026.
Potentially toxic elements impair male reproductive function through oxidative stress, DNA damage, mitochondrial dysfunction, inflammation, endocrine disruption and epigenetic alterations. Antioxidants, phytochemicals, chelating agents and healthy lifestyle interventions may help mitigate testicular toxicity and preserve fertility.
Sakshi Yadav, Placheril J John
wiley   +1 more source

Global Proteomic Analysis of Sperm and Seminal Plasma From Tropically‐Adapted Rams With Contrasting Parameters of Frozen‐Thawed Semen

Molecular Reproduction and Development, Volume 93, Issue 10, October 2026.
ABSTRACT The aim of this study was to characterize the proteome of sperm and seminal plasma (SP) from rams with high semen freezability (HF) and low semen freezability (LF). Eleven ejaculates were collected from 12 rams, at 3‐day intervals, and cryopreserved (132 semen samples).
Wallisson Bruno de Morais Pacheco, Iran Aguila Maciel, Suane Santos Alves dos Santos, Alan Martins de Araújo, Francisca Nágila Matos Almeida, Denise Damasceno Guerreiro, Sheheryar Sheheryar, Lais Lacerda Brasil de Oliveira, Felipe Domingos de Sousa, Mohibullah Shah, Maria Elisabete Amaral Moraes, Carlos Roberto Koscky Paier, Ana Cristina de Oliveira Monteiro, Carminda Sandra Brito Salmito‐Vanderley, Arlindo A. Moura   +14 more
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

CRISPR/Cas9‐mediated Genome‐editing Reveals 10 Testis‐enriched Genes and One Non‐testis‐enriched Gene are Dispensable for Male Fecundity in Mice

Andrology, Volume 14, Issue 7, Page 2150-2159, October 2026.
ABSTRACT Background More than 1000 genes have been identified as predominantly expressed in the human testis. Advances in gene editing technologies have enabled the rapid and efficient generation of genetically engineered mice. This approach facilitates the screening of genes essential for spermatogenesis by analyzing knockout mouse models.
Yumiao Qiu, Keisuke Shimada, Masahito Ikawa   +2 more
wiley   +1 more source

Acrosome reaction inactivation in sea urchin sperm [PDF]

, 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,
Garcı́a, Lucı́a, Darszon, Alberto, Lucı́a Garcı́a, Rodrı́guez, Esmeralda, Otilia Zapata, Agustı́n Guerrero, Guerrero, Agustı́n, Zapata, Otilia, Alberto Darszon, Esmeralda Rodrı́guez   +9 more
core   +1 more source

Seminal Plasma Exosomal miRNA Profiling Reveals hsa‐miR‐7‐5p as a Key Regulator of Sperm Motility in Asthenozoospermia

Andrology, Volume 14, Issue 7, Page 2166-2179, October 2026.
ABSTRACT Background Asthenozoospermia is a significant contributing factor to male infertility. Accumulating evidence indicates that impaired sperm motility is closely linked to dysregulated microRNA expression during spermatogenesis. Seminal plasma exosomes are enriched with diverse microRNAs, which play pivotal roles in modulating sperm motility, the
Zhi‐Jian Zhu, Meng‐Li Cui, Wen‐Jing Yuan, Jia‐Ning Zhang, Shuo Zhang, Xi‐Qiao Yao, Ruo‐Qing Li, Jin‐Feng Li, En‐Zhong Li   +8 more
wiley   +1 more source

Impact of Sorting and Catch Media on Porcine Sperm Motility, Capacitation, and Viability

Andrology, Volume 14, Issue 7, Page 2207-2220, October 2026.
ABSTRACT Background Fluorescence‐activated cell sorting (FACS) has emerged as a powerful tool for selecting spermatozoa of a desired population of fluorescent biomarkers, offering potential applications in reproductive biology and agriculture. However, concerns remain regarding sorting‐induced physiological alterations that could compromise spermatozoa
Tyler Weide, Juan Steibel, Karl Kerns
wiley   +1 more source

PFOA exposure decreases acrosome reaction and increases DNA oxidative damage by impairing the sperm head shaping in mice

Ecotoxicology and Environmental Safety
Perfluorooctanoic acid (PFOA) is a reproductive toxicant, but its effects on sperm head shaping and acrosome reaction remain unknown. Adult male Bal b/c mice were given 0, 2 or 10 mg/kg/day of PFOA for 6 weeks by gavage. Elevated sperm head malformations
Chuan Wang, Rui Yang, Wei Hu, Shi-Hao Zhang, Feng-Wen Niu, Xiao-Yi Zhang, Qing-Lin Ye, De-Xiang Xu, Zhi-Hui Zhang, Dong-Dong Xie   +9 more
doaj   +1 more source