Results 91 to 100 of about 32,786 (330)

Male meiotic spindle features that efficiently segregate paired and lagging chromosomes

eLife, 2020
Chromosome segregation during male meiosis is tailored to rapidly generate multitudes of sperm. Little is known about mechanisms that efficiently partition chromosomes to produce sperm.
Gunar Fabig, Robert Kiewisz, Norbert Lindow, James A Powers, Vanessa Cota, Luis J Quintanilla, Jan Brugués, Steffen Prohaska, Diana S Chu, Thomas Müller-Reichert   +9 more
doaj   +1 more source

Testicular histopathology and its association with germ cell numbers, serum concentrations of reproductive hormones, and semen quality

Andrology, EarlyView.
Abstract Background It is well‐established that spermatogenesis, semen quality, and reproductive hormones are interlinked. It is, however, less well‐described how various specific testicular histopathologies are linked to reproductive hormones and semen quality.
Gülizar Saritas, Nina Mørup, Trine H. Johannsen, Anders Juul, Lise Aksglaede, Sofia B. Winge, Kristian Almstrup   +6 more
wiley   +1 more source

Ultrastructure of the Bovine Testis in Cattle (Bos taurus): New View

Animals
The purpose of this study was to analyze the ultrastructure of the testes of sexually immature calves and reproductive bulls of the Polish Holstein-Friesian Black-and-White breed. Utilizing TEM, this study identified three distinct stages of seminiferous
Katarzyna Michałek, Marta Grabowska, Patrycja Oberska, Dariusz Gączarzewicz, Andrzej Syczewski, Septimiu Cassian Tripon, Lucian Barbu-Tudoran, Maria Suciu   +7 more
doaj   +1 more source

Pore-linked filaments in anura spermatocyte nuclei

Anais da Academia Brasileira de Ciências, 2007
Pore-linked filaments were visualized in spreads of anuran spermatocyte nuclei using transmission electron microscope. We used Odontophrynus diplo and tetraploid species having the tetraploid frogs reduced metabolic activities.
Maria Luiza Beçak, Kazumi Fukuda-Pizzocaro   +1 more
doaj   +1 more source

Stabilization of the Actomyosin Ring Enables Spermatocyte Cytokinesis in Drosophila

Molecular Biology of the Cell, 2010
The scaffolding protein anillin recruits septins to the cleavage furrow and constrains actomyosin contractility. Expression of E-cadherin suppresses the cytokinesis defects caused by anillin knockdown and stabilizes F-actin in the furrow, thereby ...
Philip Goldbach, Raymond Wong, Nolan Beise, Ritu Sarpal, W. Trimble, J. Brill   +5 more
semanticscholar   +1 more source

The use of deidentified organ donor testes for research

Andrology, EarlyView.
Abstract Our knowledge of testis development and function mainly comes from research using mammalian model organisms, primarily the mouse. However, there are integral differences between men and other mammalian species regarding cellular composition and expression profiles during fetal and post‐natal testis development and in the mature testis ...
Marina V. Pryzhkova, Marnie W. Skinner, Juliana I. Candelaria, Stephen R. Wellard, Philip W. Jordan   +4 more
wiley   +1 more source

Spermatogenesis and sertoli cell activity in mice lacking Sertoli cell receptors for follicle stimulating hormone and androgen [PDF]

, 2008
Spermatogenesis in the adult male depends on the action of FSH and androgen. Ablation of either hormone has deleterious effects on Sertoli cell function and the progression of germ cells through spermatogenesis.
A. Monteiro, Abel, Baker, Baker, Baker, Bartles, Beardsley, Boettger-Tong, Carpenter, Casteren, Cattanach, Chang, Cheng, Czechowski, De Gendt, De Gendt, Denolet, Dierich, Dym, Eacker, F. Guillou, G. Verhoeven, H. M. Charlton, Haavisto, Haywood, Heckert, Hirst, Hofmann, Holdcraft, Johnston, Jonsson, K. De Gendt, Kageyama, Kumar, Lecureuil, Lyon, M. H. Abel, Maguire, Mayhew, McLachlan, McLachlan, Meng, O’Shaughnessy, O’Shaughnessy, O’Shaughnessy, O’Shaughnessy, O’Shaughnessy, O’Shaughnessy, P. J. Baker, P. J. O’Shaughnessy, Russell, Russell, Sadate-Ngatchou, Sadate-Ngatchou, Safina, Sharpe, Singh, Sluka, Tan, Vihko, Wong, Wreford, Yang, Zhou   +63 more
core   +2 more sources

Pharmacogenetics of follicle‐stimulating hormone action in the male

Andrology, EarlyView.
Abstract Male factor infertility (MFI) is involved in half of the cases of couple infertility. The follicle‐stimulating hormone (FSH) therapy is considered efficient to improve semen parameters and pregnancy rate in patients with idiopathic MFI, following the lesson learned from hypogonadotropic hypogonadism.
Andrea Graziani, Giuseppe Grande, Raffele Scafa, Riccardo Selice, Andrea Garolla, Maria Santa Rocca, Cinzia Vinanzi, Alberto Ferlin   +7 more
wiley   +1 more source

Testis: Spermatocytic seminoma [PDF]

Atlas of Genetics and Cytogenetics in Oncology and Haematology, 2011
Note Classification of germ cell tumours has not been adapted uniformly in the world. Two classifications most commonly used are the modified WHO classification and the British Testicular Panel (BTTP) classification. In addition Grigor proposed in 1993 a new classification based on biological features, and it was suggested in the AFIP Atlas of Tumor ...
openaire   +3 more sources

The Influence of Granting Ngor Eggplant (Solanium Indicum) Extract Inhibiting of Spermatogenesis in Mice (Mus Musculus) [PDF]

, 2017
The study about contraceptive for adult especially for men that the numbers were limited, so needed the ingredients contraceptive is derived from a plant.
Astuti, N. P. (Ni), Karmaya, I. N. (I), Pangkahila, J. A. (J), Satriyasa, B. K. (Bagus), Suarjana, N. (Nyoman)   +4 more
core