Results 111 to 120 of about 26,981 (241)
Role of tyrosine phosphorylation in sperm capacitation / acrosome reaction [PDF]
, 2004 Capacitation is an important physiological pre-requisite before the sperm cell can acrosome react and fertilize the oocyte. Recent reports from several laboratories have amply documented that the protein phosphorylation especially at tyrosine residues is
Preeti B Rajesh +3 more
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CellsCryopreservation of sperm is a resource used for artificial insemination. In the case of bovines, it ensures the reproduction of animals through cells from males with a highlighted genetic background. The fertilisation capacity of sperm cells is achieved
Maia A. Rodríguez +3 more
doaj +1 more source
ADVANCED STUDIES ON IMPROVING SHEEP FERTILITY BY USING ARTIFICIAL MEANS OF REPRODUCTION [PDF]
Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2014 Artificial insemination (AI) in livestock is used to optimize reproduction efficiency. Compared to other semenpreservation methods, cryopreservation is an established industry used worldwide for performing AI.
Mostafa A.R. IBRAHIM +7 more
doaj
Peroxiredoxin 4 Involved in Spermatogenesis by Affecting Oxidative Stress and Ferroptosis
Andrology, Volume 14, Issue 7, Page 2329-2346, October 2026.ABSTRACT Background The main functions of testes are sperm production and androgen secretion in testicular befitting microenvironment. Excessive level of the reactive oxygen species (ROS) from metabolism and cellular events can lead to oxidative stress (OS) and ferroptosis, which injure the functions of mitochondria and endoplasmic reticulum (ER) of ...
Shuning Yuan +10 more
wiley +1 more source
Acrosome reaction in morphologically different types of human spermatozoa
, 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 ...
Veljko Vlaisavljević +2 more
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AntioxidantsOxidative stress (OS) is a major cause of defective sperm function. During laboratory handling, gametes are exposed to OS, potentially mitigated by in vitro antioxidant supplementation.
Laura Liguori +4 more
doaj +1 more source
Small GTPases in Acrosomal Exocytosis
, 2015 Regulated exocytosis employs a conserved molecular machinery in all secretory cells. Soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) and Rab superfamilies are members of this machinery. Rab proteins are small GTPases that organize membrane microdomains on organelles by recruiting specific effectors that strongly influence ...
Bustos, Matias Alberto +4 more
openaire +4 more sources
Testicular Biopsies in Adolescent and Adult Andrological Patients: The EAA Clinical Guidelines
Andrology, Volume 14, Issue 7, Page 1906-1928, October 2026.ABSTRACT Background Histological evaluation of testicular tissue is central to the assessment of infertile men, particularly those at an increased risk of testicular germ cell tumors (TGCT). Traditionally, testicular biopsies have been used primarily for diagnostic purposes, such as the detection of germ cell neoplasia in situ (GCNIS). With advances in
Lise Aksglaede +11 more
wiley +1 more source
Zona pellucida mediated acrosome reaction and sperm morphology
, 1997 Sperm samples from 29 men randomly selected from the andrology laboratory, were used to evaluate acrosome reaction response to solubilized human zona pellucida. Capacitated sperm samples were exposed to a solution containing 2 zona pellucidae (ZP) per μl
Habenicht U.-F. +4 more
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Studies on male infertility--acrosome reaction of the human sperm incubated in vitro [PDF]
, 1985 triple-stain techniqueを用いヒト精子acrosome reactionを観察した.1) mBWW中では培養6時間後まではacrosome reaction陽性精子の割合は漸増した.2) human serum albuminを含まない培養液中ではacrosome reactionはおこらなかった.Caイオン, Ca ionophore A23187, trypsinにはacrosome reactionの誘発作用を認めた.3)不妊患者精子の中で乏精子症患者の精子や運動率が20 ...
岡田, 弘
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