Results 21 to 30 of about 13,092 (226)

RESEARCH CONCERNING THE INFLUENCE OF CAPACITATION CONDITIONS ON THE QUALITY OF SPERMATOZOA USED FOR IN VITRO FERTILIZATION

Scientific Papers Animal Science and Biotechnologies, 2023
The optimization of capacitation technique is based on the study of the influence factors of this process. Studying the influence of capacitation conditions on boar sperm quality we concentrated our research upon capacitation technique and method.
M. ZĂHAN, V. MICLEA, I. ROMAN, ILEANA MICLEA, ANDREA HETTIG   +4 more
doaj  

Effect of estrogens on boar sperm capacitation in vitro

Reproductive Biology and Endocrinology, 2010
Background Mammalian sperm must undergo a series of controlled molecular processes in the female reproductive tract called capacitation before they are capable of penetrating and fertilizing the egg.
Ded Lukas, Dostalova Pavla, Dorosh Andriy, Dvorakova-Hortova Katerina, Peknicova Jana   +4 more
doaj   +1 more source

Specific lectin binding sites during in vitro capacitation and acrosome reaction in boar spermatozoa

Italian Journal of Animal Science, 2021
Sperm glycocalyx and plasma membrane undergo outstanding modifications during fertilization. However, it is unclear how in vitro capacitation time and acrosome reaction affect the specific location of boar sperm glycoconjugates.
Laura Robles-Gómez, Leopoldo González-Brusi, Paula Sáez-Espinosa, Natalia Huerta-Retamal, Paula Cots-Rodríguez, Manuel Avilés, María José Gómez-Torres   +6 more
doaj   +1 more source

The Modulation of Functional Status of Bovine Spermatozoa by Progesterone

Animals, 2021
The aim of this study is to identify the effects of progesterone (PRG) on the capacitation and the acrosome reaction in bovine spermatozoa. The fresh sperm samples were incubated with and without capacitation inductors (heparin, dibutyryl cyclic ...
Vitaly Denisenko, Irena Chistyakova, Natalia Volkova, Ludmila Volkova, Baylar Iolchiev, Tatyana Kuzmina   +5 more
doaj   +1 more source

Focal adhesion kinase is required for actin polymerization and remodeling of the cytoskeleton during sperm capacitation

Biology Open, 2016
Several focal adhesion proteins are known to cooperate with integrins to link the extracellular matrix to the actin cytoskeleton; as a result, many intracellular signaling pathways are activated and several focal adhesion complexes are formed.
Ana L. Roa-Espitia, Eva R. Hernández-Rendón, Rafael Baltiérrez-Hoyos, Rafaela J. Muñoz-Gotera, Antonieta Cote-Vélez, Irma Jiménez, Humberto González-Márquez, Enrique O. Hernández-González   +7 more
doaj   +1 more source

Protein Kinase A (PRKA) Activity Is Regulated by the Proteasome at the Onset of Human Sperm Capacitation

Cells, 2021
The proteasome increases its activity at the onset of sperm capacitation due to the action of the SACY/PRKACA pathway; this increase is required for capacitation to progress. PRKA activity also increases and remains high during capacitation.
Héctor Zapata-Carmona, Lina Barón, Milene Kong, Patricio Morales   +3 more
doaj   +1 more source

Nonlinear permuted Granger causality

Canadian Journal of Statistics, EarlyView.
Abstract Granger causality is an established, contentious method that seeks causal temporal connections via association and precedence. While not true causal inference, it assists in mapping networks of information flow that may warrant further study.
Noah D. Gade, Jordan Rodu
wiley   +1 more source

Red LED Light Irradiation Increases the Resistance Against Environmental Stress of Frozen Bovine Sperm Thawed in Suboptimal Conditions

Animals
This work sought to test the positive effect of red LED light on frozen bovine sperm resistance to thawing in suboptimal conditions. Moreover, a preliminary study explores whether this improvement could have any repercussions on in vivo fertilizing ...
Olga Blanco-Prieto, Carolina Maside, Andrea Gruzmacher, Manuel Ortiz, Marcelo Ratto, Francisco Javier Urra, Tomás Vera, Pablo Strobel, Jaime Catalán, Beatrice Mislei, Diego Bucci, Marc Yeste, Joan E. Rodríguez-Gil, Alfredo Ramírez-Reveco   +13 more
doaj   +1 more source

High throughput small RNA and transcriptome sequencing reveal capacitation-related microRNAs and mRNA in boar sperm

BMC Genomics, 2018
Background Capacitation, a prerequisite for oocyte fertilization, is a complex process involving series of structural and functional changes in sperms such as membrane modifications, modulation of enzyme activities, and protein phosphorylation.
Yuan Li, Rong-Hong Li, Ming-Xia Ran, Yan Zhang, Kai Liang, Ying-Nan Ren, Wen-Cheng He, Ming Zhang, Guang-Bin Zhou, Izhar Hyder Qazi, Chang-Jun Zeng   +10 more
doaj   +1 more source

Civil Society Advocacy and Climate Change in Kenya: The Question of “Local Voices” and Their “Amplification”

Environmental Policy and Governance, EarlyView.
ABSTRACT The role of civil society organizations (CSOs) in addressing climate change is acknowledged, but engagement with questions of voice remains limited, especially in the Global South. Addressing this, this paper zooms in on (International) nongovernmental organizations ((I)NGOs) and their collaborations with domestic CSOs in the Global South on ...
Margit van Wessel, Precious Akampurira
wiley   +1 more source