Results 21 to 30 of about 141,242 (314)

Relationship Among Traditional Semen Parameters, Sperm DNA Fragmentation, and Unexplained Recurrent Miscarriage: A Systematic Review and Meta-Analysis

Frontiers in Endocrinology, 2022
Several studies have explored the relationship among traditional semen parameters, sperm DNA fragmentation (SDF), and unexplained recurrent miscarriage (RM); however, the findings remain controversial.
Yanpeng Dai, Junjie Liu, Enwu Yuan, Yushan Li, Ying Shi, Linlin Zhang   +5 more
doaj   +1 more source

Results of a China external quality assessment program for seminal plasma biochemistry: a 5 years experience [PDF]

Journal of Men's Health
Background: This 5-year external quality assessment (EQA) study evaluated laboratory performance in analyzing seminal plasma biomarkers (zinc, citrate, fructose, neutral α-glucosidase (NAG)), assessing inter-lab variability, methodological trends, and
Yan Zheng, Lijuan Ying, Lin Yu, Yingbi Wu, Yuan Liu, Jintao Yuan, Chengcheng Diao, Yi Ma, Qingyuan Cheng, Fuping Li   +9 more
doaj   +1 more source

Microcystin leucine arginine induces human sperm damage: Involvement of the Ca2+/CaMKKβ/AMPK pathway

Ecotoxicology and Environmental Safety, 2023
As a common pollutant in the water environment, microcystin leucine arginine (MC-LR) can enter semen and damage the sperm in animals. However, the mechanism by which MC-LR damages human sperm is unclear.
Xing Guo, Ruiyang Meng, Junjie Liu, Shiyu Zhang, Haohao Liu, Xingde Du, Huizhen Zhang, Yushan Li   +7 more
doaj   +1 more source

Age-specific and sex-specific reference intervals for non-fasting lipids and apolipoproteins in 7260 healthy Chinese children and adolescents measured with an Olympus AU5400 analyser: a cross-sectional study

BMJ Open, 2019
Aims Ethnic, demographic, lifestyle, genetic and environmental factors influence lipids and apolipoproteins. The aim of this study was to establish age-specific and gender-specific reference intervals for non-fasting lipids and apolipoproteins in healthy
Junjie Liu, Yanpeng Dai, Enwu Yuan, Yushan Li, Quanxian Wang, Linkai Wang, Yanhua Su   +6 more
doaj   +1 more source

A Possible Role for Nerve Growth Factor and Its Receptors in Human Sperm Pathology

Biomedicines, 2023
Nerve growth factor (NGF) signalling affects spermatogenesis and mature sperm traits. In this paper, we aimed to evaluate the distribution and the role of NGF and its receptors (p75NTR and TrKA) on the reproductive apparatus (testis and epididymis) and ...
Anna Maria Stabile, Alessandra Pistilli, Elena Moretti, Desirée Bartolini, Mariangela Ruggirello, Mario Rende, Cesare Castellini, Simona Mattioli, Rosetta Ponchia, Sergio Antonio Tripodi, Giulia Collodel   +10 more
doaj   +1 more source

Protein-carbohydrate interactions during fertilization [PDF]

, 1998
Interaction between gametes during fertilization is at least in part regulated by carbohydrate moieties of the zona pellucida (ZP) and carbohydrate binding proteins of the sperm surface. This review focuses on the protein-carbohydrate interactions during
Plendl, J., Sinowatz, Fred, Kolle, S.
core   +1 more source

Single-cell RNA sequencing reveals the local cell landscape in mouse epididymal initial segment during aging

Immunity & Ageing, 2023
Background Morphological and functional alterations in aging reproductive organs result in decreased male fertility. The epididymis functions as the transition region for post-testicular sperm maturation.
Jintao Zhuang, Xiangping Li, Jiahui Yao, Xiangzhou Sun, Jiumin Liu, Hua Nie, Yang Hu, Xiangan Tu, Huang Liu, Weibing Qin, Yun Xie   +10 more
doaj   +1 more source

Methylation Status of Imprinted Genes and Repetitive Elements in Sperm DNA from Infertile Males [PDF]

, 2011
Stochastic, environmentally and/or genetically induced disturbances in the genome-wide epigenetic reprogramming processes during male germ-cell development may contribute to male infertility.
Tresch, A., N. El Hajj, M. Schorsch, Haaf, T., Hahn, T., U. Zechner, E. Schneider, T. Hahn, T. Haaf, El Hajj, N., Gromoll, J., Schorsch, M., A. Tresch, Schneider, E., Zechner, Ulrich, J. Gromoll   +15 more
core   +1 more source

Deoxyribonuclease Activity in Human Sperm [PDF]

Archives of Andrology, 1985
A previous failure to detect DNase activity in human sperm sonicates was ascribed to an inadequate amount of sperm used. In the present work aliquots contained more sperm (1.5-2.5/10(6)), permitting the detection of enzyme activity. The latter was significantly higher in spermatozoa of oligozoospermic origin compared with activity in normospermic ...
R, Singer, H, Levinsky, M, Sagiv, M, Barnet, C, Servadio, D, Allalouf   +5 more
openaire   +2 more sources

Nuclear organisation of sperm remains remarkably unaffected in the presence of defective spermatogenesis [PDF]

, 2011
Organisation of chromosome territories in interphase nuclei has been studied in many systems and positional alterations have been associated with disease phenotypes (e.g. laminopathies, cancer) in somatic cells.
Ellis, Michael, Dimitris Ioannou, Meershoek, Eric J., Dimitra Christopikou, Eric J. Meershoek, Thornhill, Alan R., Michael Ellis, Darren Karl Griffin, Ioannou, Dimitris, Christopikou, Dimitra, Griffin, Darren K., Alan R. Thornhill   +11 more
core   +1 more source