Results 91 to 100 of about 2,944,740 (334)

Measurement and significance of sperm morphology [PDF]

Asian Journal of Andrology, 2010
The measurement or evaluation and clinical significance of human sperm morphology has always been and still is a controversial aspect of the semen analysis for the determination of a male's fertility potential. In this review the background of the development of the evaluation criteria for sperm morphology will be discussed. Aspects of criticism on the
Roelof, Menkveld, Cas A G, Holleboom, Johann P T, Rhemrev   +2 more
openaire   +2 more sources

Sertoli Cell‐Derived Extracellular Vesicles Orchestrate Cadmium‐Induced Testicular Inflammation and Fibrosis

Advanced Science, EarlyView.
Environmental cadmium exposure disrupts testicular homeostasis through a novel intercellular communication axis. Stressed Sertoli cells release extracellular vesicles carrying damage‐associated molecular patterns and mitochondrial fragments, which activate macrophages via TLR4/NF‐κB signaling.
Jianfeng Ma, Mailin Gan, Shuang Liang, Siyu Chen, Ziling Hao, Yiting Yang, Jiawei Lu, Qihang Wu, Yuqian Shi, Lijun Sun, Jiaxin Li, Saihao Wang, Yan Wang, Xiaofeng Zhou, Lei Chen, Ye Zhao, Li Zhu, Linyuan Shen   +17 more
wiley   +1 more source

Selenoproteins in mammalian spermatogenesis:role of the nuclear GPx4 [PDF]

, 2011
The selenoprotein Phospholipid Hydroperoxide Glutathione Peroxidase (PHGPx/GPx4) is an enzyme unique among the various GPxs, because it is able to use protein thiols, beside glutathione, The GPx4 gene encodes for three isoforms having different ...
Maccari, Irene
core  

Directed Evolution Improves the Catalytic Efficiency of APEX2‐Mediated Proximity‐Dependent RNA Labeling

Advanced Science, EarlyView.
ABSTRACT Engineered ascorbate peroxidase APEX2 has been widely used for spatially restricted profiling of subcellular biomolecules, but its catalytic efficiency toward newly developed probes such as biotin‐aniline (Btn‐An) remains suboptimal. To overcome this limitation, we performed yeast surface display‐based directed evolution to enhance APEX2 ...
Gang Wang, Yi Li, Peiyuan Meng, Peng Zou
wiley   +1 more source

Spermatogenesis and sperm structure in the black-striped pipefish Syngnathus abaster (Teleostei, Syngnathidae) = Spermatogenesi e struttura degli spermatozoi in Syngnathus abaster (Teleostei, Synghathidae) [PDF]

, 2010
The gonads of adult males of the black-striped pipejish Syngnathus abaster were observed during the reproductive season to describe mature sperm both quantitativel/y and qualitatively.
Addis, Alberto, Biagi, Francesca, Carcupino, Marcella, Corso, Gavina   +3 more
core  

RNA from a simple-tandem repeat is required for sperm maturation and male fertility in Drosophila melanogaster. [PDF]

, 2019
Tandemly-repeated DNAs, or satellites, are enriched in heterochromatic regions of eukaryotic genomes and contribute to nuclear structure and function. Some satellites are transcribed, but we lack direct evidence that specific satellite RNAs are required ...
Allshire, Brown, Cai, Chen, Demarco, Dernburg, Ding, Eren-Ghiani, Ferree, Herbert, Hoskins, Hoskins, Jagannathan, Jain, Jandura, Jayaramaiah Raja, Johnson, Kaessmann, Kelemen, Kost, Larracuente, Legendre, Lohe, Lohe, McKee, McNulty, Ni, Nicholson, Pathak, Rathke, Rathke, Rinn, Rošić, Shirai, Shpiz, Steinhauer, Strom, Sun, Velazquez Camacho, Wei, White-Cooper, White-Cooper, Yap, Yuan, Zhu   +44 more
core   +2 more sources

Sperm motility and morphology changes in rats exposed to cadmium and diazinon

Reproductive Biology and Endocrinology, 2016
BackgroundHumans are ubiquitously exposed to multiple environmental contaminants. Consequences of combined action on the reproductive system remain unknown.
M. Adamkovicova, R. Toman, M. Martiniakova, R. Omelka, R. Babosová, Vladimíra Krajčovičová, B. Grosskopf, P. Massányi   +7 more
semanticscholar   +1 more source

Morphometric analysis of human sperm morphology [PDF]

International Journal of Andrology, 1994
SummaryFourteen morphological forms of human spermatozoa were analysed morphometrically using semi‐automated image analysis techniques. Five basic (area, perimeter, length, width and mass) and five derived (ratio, length minus width, ellipticity, form and total mass) parameters were considered. Statistical analysis showed differences among all 14 types
F, Pérez-Sánchez, J J, de Monserrat, C, Soler   +2 more
openaire   +2 more sources

The Landscape and Regulation of Histone Crotonylation in Mammalian Gametes and Early Embryos

Advanced Science, EarlyView.
Histone crotonylation undergoes a genome‐wide transition from broad domains to canonical narrow peaks during minor zygotic genome activation (ZGA). This remodeling is required for proper major ZGA and blastocyst formation. Disruption of this transition by transcriptional inhibition, metabolic perturbation, or HDAC1 dysfunction impairs embryonic ...
Shenli Yuan, Yelian Yan, Yalin Liang, Kanghua Zhong, Zhican Fu, Xiaobo Wang, Chao Liu, Tao Huang, Keliang Wu   +8 more
wiley   +1 more source

Choice of staining technique affects the morphological assessment of epididymal feline sperm

Veterinární Medicína, 2016
Morphological examination of spermatozoa remains a valuable tool for determining the quality of feline sperm for cryopreservation and/or for use in artificial insemination.
C.C. Perez-Marin, E. Jimenez, E. Aguera
doaj   +1 more source