Results 121 to 130 of about 21,983 (289)

Mathematical modeling of the GnRH pulse and surge generator [PDF]

SIAM Journal on Applied Dynamical Systems, Vol. 6 (2007), No. 2, pp 441-456, 2005
We propose a mathematical model allowing for the alternating pulse and surge pattern of GnRH (Gonadotropin Releasing Hormone) secretion. The model is based on the coupling between two systems running on different time scales. The faster system corresponds to the average activity of GnRH neurons, while the slower one corresponds to the average activity ...
arxiv  

Vitamin D levels and biomarkers of male fecundity: A study from the Danish National Birth Cohort

Andrology, EarlyView.
Abstract Background Vitamin D is metabolised throughout the male reproductive system, suggesting a direct regulatory role of vitamin D in male reproduction. Objectives To investigate the association between plasma vitamin D levels at sperm ejaculation and during spermatogenesis and biomarkers of male fecundity in young men.
Anne Gaml‐Sørensen, Nis Brix, Sandra Søgaard Tøttenborg, Christian Lindh, Karin Sørig Hougaard, Siri Eldevik Håberg, Gunnar Toft, Jens Peter Ellekilde Bonde, Cecilia Høst Ramlau‐Hansen   +8 more
wiley   +1 more source

Endocrine Abnormalities and Growth Pattern in Single Large‐Scale Mitochondrial DNA Deletion Syndromes

Acta Paediatrica, EarlyView.
ABSTRACT Aim To assess the prevalence of endocrine disorders and investigate growth patterns in single large‐scale mitochondrial DNA deletion syndromes (SLSMDs). Methods A retrospective study of all children with SLSMD who attended Sheba Medical Center, Israel, from February 2017 to September 2024.
Ayman Daka, Einat Lahav, Omer Bar Yosef, Yoav Bolkier, Yael Levy‐Shraga, Yair Anikster, Elad Jacoby, Noah Gruber   +7 more
wiley   +1 more source

Gut microbiota-gonadal axis: the impact of gut microbiota on reproductive functions

Frontiers in Immunology
The influence of gut microbiota on physiological processes is rapidly gaining attention globally. Despite being under-studied, there are available data demonstrating a gut microbiota-gonadal cross-talk, and the importance of this axis in reproduction ...
Victory J. Ashonibare, Victory J. Ashonibare, Victory J. Ashonibare, Bolaji A. Akorede, Bolaji A. Akorede, Precious J. Ashonibare, Precious J. Ashonibare, Tunmise M. Akhigbe, Tunmise M. Akhigbe, Roland Eghoghosoa Akhigbe, Roland Eghoghosoa Akhigbe   +10 more
doaj   +1 more source

A CRH Theory of Autism Spectrum Disorder [PDF]

arXiv
This paper presents a complete theory of autism spectrum disorder (ASD), explaining its etiology, symptoms, and pathology. The core cause of ASD is excessive stress-induced postnatal release of corticotropin-releasing hormone (CRH). CRH competes with urocortins for binding to the CRH2 receptor, impairing their essential function in the utilization of ...
arxiv  

Treatment With Inhaled Nitric Oxide and General Intelligence in Preterm Children in Two European Cohorts

Acta Paediatrica, EarlyView.
ABSTRACT Aim To investigate whether treatment with inhaled nitric oxide is associated with cognitive performance at age 5–6 years in preterm‐born children. Methods We analysed preterm children from two large European cohort studies, the German Neonatal Network (GNN) (N = 3606) and the French EPIPAGE‐2 cohort (N = 2579) admitted to neonatal care and ...
Nicole Tsalacopoulos, Valérie Benhammou, Laetitia Marchand‐Martin, Véronique Pierrat, Pierre‐Yves Ancel, Armita Shahesmaeilinejad, Viktoria Rücker, Vincent Prevot, Konstantina Chachlaki, Christoph Härtel, Wolfgang Göpel, Juliane Spiegler, on behalf of the miniNO Consortium   +12 more
wiley   +1 more source

The serum evaluation of sex hormones including DHEAs, DHT, testosterone in oral lichen planus patients

Scientific Reports
Lichen planus (LP), an inflammatory and chronic disorder, is immune-mediated and influences nails, skin, hair, and mucosal tissues. Autoimmune diseases affect females more commonly, and it is reported that there is an association between certain sex ...
Fahimeh Rezazadeh, Fatemeh Lavaee, Saba Dezhkameh, Aylar Afshari   +3 more
doaj   +1 more source

Sexual Dimorphism and Hypothalamic Astrocytes: Focus on Glioprotection

Neuroglia
Sexual dimorphism refers to biological differences between males and females in the same species, including morphological, physiological, and behavioral characteristics.
Natalie K. Thomaz, Larissa Daniele Bobermin, André Quincozes-Santos   +2 more
doaj   +1 more source

Steroid Receptors and Vertebrate Evolution [PDF]

arXiv, 2019
Considering that life on earth evolved about 3.7 billion years ago, vertebrates are young, appearing in the fossil record during the Cambrian explosion about 542 to 515 million years ago. Results from sequence analyses of genomes from bacteria, yeast, plants, invertebrates and vertebrates indicate that receptors for adrenal steroids (aldosterone ...
arxiv  

Social cues in the expression of sequential alternative reproductive tactics in young males of the peacock blenny, Solaria pavo [PDF]

, 2012
Phenotypic change in response to variation in environmental cues has been widely documented in fish. Transitions in social dominance, in particular, have been shown to induce a rapid switch in reproductive phenotypes in many species. However, this effect
Almada, Almada, Barlow, Baron, Bass, Borg, Canário, Carneiro, Consten, Consten, David Gonçalves, Eastabrook, Ejike, Emlen, Emlen, Fernald, Fishelson, Fitzpatrick, Frazier, Gonçalves, Gonçalves, Gonçalves, Gonçalves, Gonçalves, Gonçalves, Goos, Hirschenhauser, Immler, Jacob, Kime, Knapp, Knapp, Leary, MacKinnon, Mariana G. Simões, Martin, Maruska, Maruska, Oliveira, Oliveira, Oliveira, Oliveira, Oliveira, Papaconstantinou, Patzner, Patzner, Radwan, Reinboth, Rodgers, Rui F. Oliveira, Santos, Saraiva, Schulz, Scott, Shuster, Taborsky, Taborsky, Teresa Fagundes, Tomkins, Tomkins, Uiblein, Whiteman, Winberg, Wingfield   +63 more
core   +2 more sources