Results 121 to 130 of about 31,775 (244)

Photoperiod modulates male sexual maturation in the Emperor tetra (Nematobrycon palmeri), a strictly tropical ornamental fish

Journal of the World Aquaculture Society, Volume 57, Issue 3, June 2026.
Abstract Photoperiod manipulation is widely used to regulate reproduction in temperate fish species, but little is known about its effects in strictly tropical species. This study evaluated whether the Emperor tetra (Nematobrycon palmeri), a tropical ornamental fish, can modulate sexual maturation in response to artificial light regimes.
Lury N. García, Gabriele Lara, Germán E. Merino   +2 more
wiley   +1 more source

, an -like gene, is essential for spermatid differentiation in the flatworm [PDF]

, 2009
Background Failure of sperm differentiation is one of the major causes of male sterility. During spermiogenesis, spermatids undergo a complex metamorphosis, including chromatin condensation and cell elongation. Although the resulting sperm morphology and
Sekii, K., Salvenmoser, W., De Mulder, K., Schärer, L., Ladurner, P.   +4 more
core   +2 more sources

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, Volume 13, Issue 26, 8 May 2026.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Scanning Electron Microscopy of the Rainbow Trout (Salmo gairdneri Richardson) Spermatozoon [PDF]

, 1976
The scanning electron microscope was used to determine the morphology of the rainbow trout (Salmo gairdneri Richardson) spermatozoon. The spermatozoon is approximately 32 μm long and consists of a head, mitochondrial collar, and flagellum.
Fribourgh, James H., Soloff, Bernard L.
core   +2 more sources

Maternal Chrono‐Nutrition and Placental DNA Methylation: The BiSC Study

Molecular Nutrition &Food Research, Volume 70, Issue 9, 13 May 2026.
This is the first study to examine how the timing of a mother's meals during pregnancy relates to changes in placental DNA methylation, an epigenetic mark. We found that the timing of the last daily meal was most important. Some epigenetic changes were linked to genes involved in placental function and development, and the long‐term health consequences
Joana Llauradó‐Pont, Sofia Aguilar‐Lacasaña, Marta Cosin‐Tomas, Jordi Julvez, Oren Contreras‐Rodríguez, Manolis Kogevinas, Kyriaki Papantoniou, Elisa Gallo, Barbara N Harding, Martine Vrijheid, Payam Dadvand, Mariona Bustamante, Camille Lassale   +12 more
wiley   +1 more source

High‐Resolution Imaging Reveals Mitochondrial Protein Imbalance in Sperm of Oligoasthenospermic Men

Molecular Reproduction and Development, Volume 93, Issue 5, May 2026.
ABSTRACT Male infertility accounts for nearly half of global infertility cases and is often linked to poor sperm quality, such as oligospermia, asthenospermia, and teratospermia. Although the exact mechanisms remain unclear, mitochondria, which are critical for ATP production and reactive oxygen species generation during fertilization, are increasingly
Pauline Teixeira, Magalie Boguenet, Florence Pascaretti‐Grizon, Florence Manero, Solenn Plouzennec, Pierre‐Emmanuel Bouet, Pascal Reynier, Arnaud Chevrollier, Pascale May‐Panloup   +8 more
wiley   +1 more source

Protective Effect of Intracellular Compounds of Lactobacillus plantarum on Goat Sperm Quality During Cryopreservation

Veterinary Medicine and Science, Volume 12, Issue 3, May 2026.
Intracellular compounds from Lactobacillus plantarum were added to a goat sperm cryopreservation extender. A concentration of 20 µL/mL improved post‐thaw sperm quality, whereas higher concentrations (80–100 µL/mL) had detrimental effects. ABSTRACT Background Cryopreservation of sperm is a key strategy for preserving and transmitting the genetic traits ...
Farshad Ariyan, Amjad Farzinpour, Abbas Farshad, Aram Sharifi   +3 more
wiley   +1 more source

Luteinizing hormone receptor knockout mouse: What has it taught us?

Andrology, Volume 14, Issue 4, Page 1017-1028, May 2026.
Abstract Luteinizing hormone (LH), along with its agonist choriongonadotropin (hCG) in humans, is the key hormone responsible for the tropic regulation of the gonadal function. LH and hCG act through their cognate receptor, the luteinizing hormone/choriongonadotropin receptor (LHCGR; more appropriately LHR in rodents lacking CG), located in the testis ...
Ilpo T. Huhtaniemi
wiley   +1 more source

spermatid

Citation: 'spermatid' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.11237 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Folding, misfolding, and regulation of intracellular traffic of G protein‐coupled receptors involved in the hypothalamic–pituitary–gonadal axis

Andrology, Volume 14, Issue 4, Page 978-991, May 2026.
Abstract Background G protein‐coupled receptors are a large and functionally diverse family of membrane receptors involved in a number of biological processes. Like other proteins, G protein‐coupled receptors need to be properly folded in order to traffic to the plasma membrane and interact with agonist.
Alfredo Ulloa‐Aguirre, Ross C. Anderson, Teresa Zariñán, Rubén Gutiérrez‐Sagal, Eduardo Jardón‐Valadez, Claire L. Newton   +5 more
wiley   +1 more source