Results 51 to 60 of about 17,740 (206)

Cell Cycle of Spermatogonia in Mouse Testis [PDF]

Investigative Radiology, 1979
This report measures the spermatogonial cell cycles and their constituent phases of proliferating type A, intermediate (In), and type B cells in the testis of the young mouse, and analyzes the cell cycle and cell population kinetic parameters, such as growth fractions and cell-birth rates, from /sup 3/HTdR autoradiographic data.
openaire   +3 more sources

A New Paradigm: 46 Structural Cell Types Function as Environment‐Supporting Innate Immune Cells, With Endothelial and Vascular Smooth Muscle Cells as Key Prototypes

iNew Medicine, EarlyView.
ABSTRACT The scope, organization, and biological significance of innate immune functions across structural cell types remain poorly defined. To address these fundamental knowledge gaps, we analyzed experimental data of transcriptomes generated by our group and others.
Juanjuan Liu, Gayani K. Nanayakkara, Yifan Lu, Fatma Saaoud, Keman Xu, Ying Shao, Bo Yuan, Shih‐Yu Hung, Haiyan Xiang, Xianwei Wang, Sadia Mohsin, Sheng Wu, Xiaolei Liu, Juncheng Wei, Zhengjie Zhou, Beata Kosmider, Mingui Fu, Laisel Martinez, Roberto Vazquez‐Padron, Wenhui Hu, Shuping Ge, Hong Wang, Xiaofeng Yang   +22 more
wiley   +1 more source

The effect of immobilization stress on the HPG axis (hypothalamic - pituitary - gonad) hormones and the number of spermatogonia [PDF]

Journal of Advanced Biomedical Sciences, 2013
Background & Objective: Stress has different effects on the living organisms. In this study the effect of immobilization stress the HPG (hypothalamic - pituitary - gonad axis) hormones secretion and the number of spermatogonia was studied in adult male ...
ahmad mozafar, mojtaba keshavarz, parvin zareian, Habiboalah Johary, hossein kargar jahromy, Shirzad Hoseini   +5 more
doaj  

Regulation of spermatogonia

StemBook, 2008
The progression of spermatogenesis relies on the precise regulation of spermatogonial self-renewal and differentiation. Many genes/proteins have been identified with specific expression profiles in individual spermatogonial cell types but the molecular mechanism of their regulation is still obscure.
openaire   +1 more source

Reproductive Challenges of the Ageing Female: A Comprehensive Narrative Review

BJOG: An International Journal of Obstetrics &Gynaecology, EarlyView.
ABSTRACT Changes in societal norms over the last few decades have resulted in novel family planning trends, notably delayed childbearing and increased maternal age at the birth of the first child. Despite advances in reproductive medicine, ageing poses significant challenges.
Sofia Bitzika, Meletios P. Nigdelis, Angelos Daniilidis, Erich‐Franz Solomayer, Irene Lambrinoudaki, Efstratios M. Kolibianakis, Dimitrios G. Goulis   +6 more
wiley   +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

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

The role of iron in normal and impaired testicular function

Andrology, EarlyView.
Abstract Iron plays a critical role in testicular physiology, impacting spermatogenesis, testosterone production, and overall testicular function. Iron homeostasis is maintained through systemic and cellular regulatory mechanisms, including hepcidin‐mediated systemic iron control and the iron‐responsive element/iron regulatory protein (IRE/IRP) system ...
Aileen Harrer, Esther G. Meyron‐Holtz, Andreas Meinhardt   +2 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

CRISPR/Cas9‐mediated Genome‐editing Reveals 10 Testis‐enriched Genes and One Non‐testis‐enriched Gene are Dispensable for Male Fecundity in Mice

Andrology, EarlyView.
ABSTRACT Background More than 1000 genes have been identified as predominantly expressed in the human testis. Advances in gene editing technologies have enabled the rapid and efficient generation of genetically engineered mice. This approach facilitates the screening of genes essential for spermatogenesis by analyzing knockout mouse models.
Yumiao Qiu, Keisuke Shimada, Masahito Ikawa   +2 more
wiley   +1 more source