Results 51 to 60 of about 18,364 (206)

Functional characterization and phenotyping of RAB2A and Lactadherin/MFGE8 as boar sperm zona pellucida binding proteins

Frontiers in Cell and Developmental Biology
Mammalian fertilization begins with the species-specific binding of spermatozoa to the oocyte’s zona pellucida (ZP), a process mediated by multiple surface proteins forming a functional receptor complex.
Natalie Zelenkova, Veronika Kraus, Lukas Ded, Daniela Spevakova, Lucie Sadilkova, Michaela Frolikova, Aneta Pilsova, Zuzana Pilsova, Barbora Klusackova, Ondrej Simonik, Eva Chmelikova, Tereza Krejcova, Michal Zigo, Peter Sutovsky, Peter Sutovsky, Marketa Sedmikova, Katerina Komrskova, Katerina Komrskova, Pavla Postlerova, Pavla Postlerova   +19 more
doaj   +1 more source

Guinea Pig Sperm Morphology and Fertility under Different Photoperiod

Animals, 2023
Sperm morphology can predict the reproductive male fertilizing potential. This study aimed to determine the morphological and morphometric spermatozoa characteristics from guinea pigs subjected to different photoperiodic stimulation.
Hurley Abel Quispe-Ccasa, Yander M. Briceño-Mendoza, Ilse Silvia Cayo-Colca   +2 more
doaj   +1 more source

Peroxiredoxin 4 Involved in Spermatogenesis by Affecting Oxidative Stress and Ferroptosis

Andrology, EarlyView.
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, Nini Wei, Weiwei Ma, Mengting Hu, Bei Zhang, Li Gao, Chao Gao, Xiaoyu Yang, Yan Meng, Jiayin Liu, Yugui Cui   +10 more
wiley   +1 more source

Acrosome reaction of fowl sperm: Evidence for shedding of the acrosomal cap in intact form to release acrosomal enzyme

Poultry Science, 2013
The aim of this study was to determine the site of enzyme release from the acrosome and the fate of the acrosomal cap during the process of acrosome reaction (AR) in fowl sperm. Gelatin substrate coverslips with halos were subjected to scanning electron microscopy to determine the site from which acrosomal proteolytic enzyme was released to form a halo
M U, Ahammad, C, Nishino, H, Tatemoto, N, Okura, S, Okamoto, Y, Kawamoto, T, Nakada   +6 more
openaire   +2 more sources

Damage assessment of the equine sperm membranes by fluorimetric technique

Brazilian Archives of Biology and Technology, 2010
To validate a practical technique of simultaneous evaluation of the plasma, acrosomal and mitochondrial membranes in equine spermatozoa three fluorescent probes (PI, FITC-PSA and MITO) were associated.
Eneiva Carla Carvalho Celeghini, André Furugen Cesar de Andrade, Cláudia Fernandes Raphael, Juliana Nascimento, Janahi Souza Ticianelli, Rubens Paes de Arruda   +5 more
doaj   +1 more source

Loss‐of‐Function Variants in CCDC189 Cause Human Oligoasthenoteratozoospermia by Disrupting Sperm Flagellar and Acrosomal Architecture

Andrology, EarlyView.
ABSTRACT Background Oligoasthenoteratozoospermia (OAT), characterized by reduced sperm count, impaired motility, and abnormal morphology, is a major cause of male infertility with substantial genetic heterogeneity. However, the underlying genetic etiology remains unresolved in a large proportion of affected individuals.
Jianteng Zhou, Ghulam Mustafa, Tingting Lin, Jingwei Ye, Huan Zhang, Hanwei Jiang, Kexin Yang, Guoning Huang, Qinghua Shi   +8 more
wiley   +1 more source

Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species

Andrology, EarlyView.
ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak, Brian J. Galletta, Nasser M. Rusan   +2 more
wiley   +1 more source

Molecular basis of the morphogenesis of sperm head and tail in mice

Reproductive Medicine and Biology, 2022
Background The spermatozoon has a complex molecular apparatus necessary for fertilization in its head and flagellum. Recently, numerous genes that are needed to construct the molecular apparatus of spermatozoa have been identified through the analysis of
Keiichiro Yogo
doaj   +1 more source

Testicular Biopsies in Adolescent and Adult Andrological Patients: The EAA Clinical Guidelines

Andrology, EarlyView.
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, George Kanakis, Ewa Rajpert‐De Meyts, Davor Jezek, Ferran Algaba, Gert Dohle, Jolanta Slowikowska‐Hilczer, Sabine Kliesch, Hermann M. Behre, Csilla Krausz, Dimitrios G. Goulis, Niels Jørgensen   +11 more
wiley   +1 more source

Improving ARTs: Microfluidics as a Tool for Sperm Selection

Andrology, EarlyView.
ABSTRACT Sperm selection is a critical step in assisted reproductive technology (ART), as sperm quality directly influences embryo quality. In vivo, the female reproductive tract imposes several physical and physiological barriers that favors only the most optimal spermatozoa reaching the fertilization site.
A. Pérez‐Gómez, A. Urriés, J. L. de Pablo, L. Serrano‐Ramón, S. Sanchez, R. Herrer, J. M. Morrell, C. Malo   +7 more
wiley   +1 more source