Results 51 to 60 of about 54,668 (320)

Lectin staining and flow cytometry reveals female-induced sperm acrosome reaction and surface carbohydrate reorganization

Scientific Reports, 2015
All cells are covered by glycans, an individually unique layer of oligo- and polysaccharides that are critical moderators of self-recognition and other cellular-level interactions (e.g. fertilization).
J. Kekäläinen, I. Larma, M. Linden, J. Evans   +3 more
semanticscholar   +1 more source

Evidence of the presence of calcium/calmodulin-dependent protein kinase IV in human sperm and its involvement in motility regulation [PDF]

, 2005
The mechanisms involved in the regulation of mammalian sperm motility are not well understood. Calcium ions (Ca(2+)) have been suggested to play a key role in the maintenance of motility; nevertheless, how Ca(2+) modulates this process has not yet been ...
Buffone, Mariano Gabriel, Chertihin, Olga, Herr, John C,, Jha, Kula N., Marin Briggiler, Clara Isabel, Vazquez, Monica Hebe, Visconti, Pablo E.   +6 more
core   +1 more source

Sericin-Enriched Rabbit Semen Preservation: Implications for Short-Term Storage Quality and Fertility at 4 or 15 °C

Animals
The influence of sericin supplementation and chilling temperatures (4 and 15 °C) on the short-term storage quality and fertility of rabbit semen was assessed over 72 h of storage.
Sanan Raza, Uğur Uçan, Melih Aksoy, Güneş Erdoğan, Zahid Naseer, Komal Khan   +5 more
doaj   +1 more source

Practical use of bioenergetic evaluation of sire-bulls with different quality of semen production

BIO Web of Conferences, 2021
For modern cattle industry, it is very important to evaluate bull-sires of different breeds by semen quality. The relevance of this problem arises in the context of development of artificial insemination technologies and biotechnology, the increasing ...
Samusenko Ludmila, Mamaev Andrey, Rodina Natalya, Sergeeva Ekaterina   +3 more
doaj   +1 more source

Single-cell analysis of [Ca²⁺]i signalling in sub-fertile men:characteristics and relation to fertilization outcome [PDF]

, 2018
STUDY QUESTIONWhat are the characteristics of progesterone-induced (CatSper-mediated) single cell [Ca2+]i signals in spermatozoa from sub-fertile men and how do they relate to fertilizing ability?SUMMARY ANSWERSingle cell analysis of progesterone-induced
Barratt, Christopher L.R., Brown, Sean G., Costello, Sarah M., Drew, Ellen, Kelly, Mark C., Martins da Silva, Sarah, Publicover, Stephen J., Ramalingam, Mythili   +7 more
core   +4 more sources

Dynamics of Sun5 Localization during Spermatogenesis in Wild Type and Dpy19l2 Knock-Out Mice Indicates That Sun5 Is Not Involved in Acrosome Attachment to the Nuclear Envelope

PLoS ONE, 2015
The acrosome is an organelle that is central to sperm physiology and a defective acrosome biogenesis leads to globozoospermia, a severe male infertility. The identification of the actors involved in acrosome biogenesis is therefore particularly important
Sandra Yassine, J. Escoffier, R. A. Nahed, V. Pierre, Thomas Karaouzene, P. Ray, C. Arnoult   +6 more
semanticscholar   +1 more source

Analysis of ejaculate parameters and sperm morphology in roosters of initial laying strains

Czech Journal of Animal Science
The aim of this study was to evaluate the influence of laying hybrid lines of domestic fowl (Gallus gallus f. domestica) and their age on ejaculate parameters in roosters.
Ladislav Máchal, Tomáš Kopec, Zuzana Rečková, Radek Filipčík, Milan Večeřa, Vojtěch Pešan, Eva Tůmová   +6 more
doaj   +1 more source

Differential Distribution and Activity Profile of Acylpeptide Hydrolase in the Rat Seminiferous Epithelium

Biomedicines, 2022
Acylpeptide hydrolase (APEH) is a serine protease involved in amino acid recycling from acylated peptides (exopeptidase activity) and degradation of oxidized proteins (endoproteinase activity).
Alejandra A. Covarrubias, Erwin De la Fuente-Ortega, Gabriela Rossi, Ennio Cocca, Mosè Rossi, Gianna Palmieri, Floria C. Pancetti   +6 more
doaj   +1 more source

STUDIES ON THE ACROSOME. X. DIFFERENTIATION OF THE STARFISH ACROSOME* [PDF]

Development, Growth and Differentiation, 1971
The course of acrosomal differentiation observed during spermiogenesis in two starfishes shows that the central components of the mature acrosome are produced by Golgi activity. In the early spermatid, small Golgi-derived vesicles enter the hydrated acrosomal mass and appear to contribute their membrane constituents to the acrosomal-membrane precursor ...
J C, Dan, A, Sirakami
openaire   +2 more sources

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source