Results 41 to 50 of about 54,668 (320)

Acrosome reaction: relevance of zona pellucida glycoproteins [PDF]

Asian Journal of Andrology, 2010
During mammalian fertilisation, the zona pellucida (ZP) matrix surrounding the oocyte is responsible for the binding of the spermatozoa to the oocyte and induction of the acrosome reaction (AR) in the ZP-bound spermatozoon.
Gupta Sk, Beena Bhandari
openalex   +2 more sources

An intact acrosome is required for the chemotactic response to progesterone in mouse spermatozoa

Molecular Reproduction and Development, 2017
Mammalian sperm become fertilization‐competent in the oviduct, during a process known as capacitation that involves the acquisition of the ability to exocytose the acrosome but also the chemotactic responses—both of which contribute to successful ...
H. Guidobaldi, N. Hirohashi, M. Cubilla, M. Buffone, L. Giojalas   +4 more
semanticscholar   +1 more source

Functional sperm assessments of African Lion Panthera leo (Mammalia: Carnivora: Felidae) in field conditions

Journal of Threatened Taxa, 2019
Wild African Lion Panthera leo populations are decreasing due to inbreeding and reduced genetic variability.  Thus, the use of assisted reproduction in the species could one day become essential.
Thiesa Butterby Soler Barbosa, Daniel de Souza Ramos Angrimani, Bruno Rogério Rui, João Diego de Agostini Losano, Luana de Cássia Bicudo, Marcel Henrique Blank, Marcilio Nichi, Cristiane Schilbach Pizzutto   +7 more
doaj   +1 more source

Exceptional sperm cooperation in the wood mouse [PDF]

, 2002
Spermatozoa from a single male will compete for fertilization of ova with spermatozoa from another male when present in the female reproductive tract at the same time.
AH Harcourt, BA Shepherd, C Holt, D Haig, DM De Kretser, E Kim, F Hayashi, GF Friend, Harry Moore, HD Moore, HD Moore, HD Moore, HD Moore, J Sivinski, JM Bedford, Katerina Dvoráková, KC Kleene, LR Fraser, Nicholas Jenkins, PM Wassarman, R Dawkins, R Trivers, R Yanagimachi, RR Baker, RR Baker, TE Tew, TR Birkhead, TR Birkhead, V Hanak, WD Hamilton, WG Breed, William Breed, X Xu   +32 more
core   +1 more source

Rapid progesterone actions on thymulin-secreting epithelial cells cultured from rat thymus [PDF]

, 1999
Many soluble factors of neural, endocrine, paracrine and autocrine origin are present in the thymus and modulate its function. Long-term effects of sex steroids have! been documented for thymocytes and cells of the thymic microenvironment. In this report
Brucker, Cosima, Downing, James E. G., Head, Gail M., Kendall, Marion D., Mentlein, Rolf   +4 more
core   +1 more source

Acid Glycohydrolases in Rat Spermatocytes, Spermatids and Spermatozoa: Enzyme Activities, Biosynthesis and Immunolocalization

Biological Procedures Online, 2001
Mammalian sperm acrosome contains several glycohydrolases thought to aid in the dispersion and digestion of vestments surrounding the egg. In this study, we have used multiple approaches to examine the origin of acrosome-associated glycohdyrdolases ...
Abou-Haila Aida, Tulsiani Daulat
doaj   +1 more source

Review: Sperm–oocyte interactions and their implications for bull fertility, with emphasis on the ubiquitin–proteasome system

Animal, 2018
Fertilization is an intricate cascade of events that irreversibly alter the participating male and female gamete and ultimately lead to the union of paternal and maternal genomes in the zygote.
P. Sutovsky
doaj   +1 more source

Human sperm ion channel (dys)function:implications for fertilization [PDF]

, 2019
BACKGROUND: Intensive research on sperm ion channels has identified members of several ion channel families in both mouse and human sperm. Gene knock-out studies have unequivocally demonstrated the importance of the calcium and potassium conductances in ...
Barratt, Christopher L. R., Brown, Sean G., Martins da Silva, Sarah J., Publicover, Stephen J.   +3 more
core   +4 more sources

Atypical structure of the nuclear membrane, distribution of nuclear pores and lamin B1 in spermatozoa of patients with complete and partial globozoospermia

Frontiers in Genetics
Globozoospermia is a form of male infertility characterized by spermatozoa with spherical heads lacking acrosomes. The aim of this study was to evaluate ultrastructural and molecular defects in different types of globozoospermia.
Elizaveta Bragina, Elizaveta Bragina, Svetlana Kurchashova, Marina Suhomlinova, Tatiana Gasanova, Svetlana Ermolaeva, Tatyana Sorokina, Eva Kirs, Evgeniy Arifulin, Olga Solovova, Oxana Ryzhkova, Sabina Khayat, Marina Andreeva, Vyacheslav Chernykh, Vyacheslav Chernykh   +14 more
doaj   +1 more source

Clinically relevant enhancement of human sperm motility using compounds with reported phosphodiesterase inhibitor activity [PDF]

, 2014
STUDY QUESTION: Can we identify compound(s) with reported phosphodiesterase inhibitor (PDEI) activity that could be added to human spermatozoa in vitro to enhance their motility without compromising other sperm functions?
Alasmari, Alasmari, Baker, Barratt, Baxendale, Bjorndahl, Christopher L.R. Barratt, Comhaire, Conti, Cooper, David, Fisch, Ford, Francis, Glenn, Harrison, HFEA, Horvath, Houslay, Huacuja, Hull, Hunnicutt, Irvine, Ivic, Lefièvre, Lefièvre, Lefièvre, Linda Lefièvre, Lorna Frame, Martin, Mortimer, Mrsny, Nassar, Negri, O'Connell, Oladipo A. Madamidola, Paul G. Wyatt, Publicover, Richter, Sarah J. Martins Da Silva, Sean G. Brown, Sousa, Steve Tardif, Stone, Tesarik, Tomlinson, Tomlinson, Torres-Flores, Tournaye, Tournaye, Van der Steeg, Wang, Yang, Yovich, Yovich   +54 more
core   +5 more sources