Results 21 to 30 of about 24,396 (278)

Estrone and estradiol concentrations in human ovaries, testes, and adrenals during the first two years of life [PDF]

To determine the origin of estrogens in infant blood, we measured estrone (E1) and estradiol (E2) in the gonads of 50 girls and 64 boys who died suddenly between birth and 2 yr of age as well as in the adrenals of 18 of these infant girls and 16 of the ...
Bidlingmaier, F., Dorr, H. G., Eisenmenger, Wolfgang, Knorr, D., Strom, T. M.   +4 more
core   +1 more source

Regulation of reproduction via tight control of gonadotropin hormone levels. [PDF]

Mammalian reproduction is controlled by the hypothalamic-pituitary-gonadal axis. GnRH from the hypothalamus regulates synthesis and secretion of gonadotropins, LH and FSH, which then control steroidogenesis and gametogenesis. In females, serum LH and FSH
Coss, Djurdjica
core   +1 more source

Paternal Caffeine Exposure Programs Offspring Stress Vulnerability via Sperm Dlk1‐Dio3 Imprinting‐Directed Remodeling of a Novel Neural Circuit

Advanced Science, EarlyView.
The study elucidates that paternal preconception stress can drive offspring hyperresponsivity of the stress system via hypomethylation of a specific DNA region in sperm. This key link is confirmed in a cohort of prospective fathers: the epigenetic alteration is associated with elevated stress hormone levels.
Mengxi Lu, Gaole Dai, Sen Zhu, Shuai Zhang, Tingting Wang, Yuan Meng, Fang Yang, Xiaoyi Han, Hui Wang, Hao Kou, Dan Xu   +10 more
wiley   +1 more source

Day length regulates gonadotrope proliferation and reproduction via an intra-pituitary pathway in the model vertebrate Oryzias latipes

Communications Biology
In seasonally breeding mammals and birds, the production of the hormones that regulate reproduction (gonadotropins) is controlled by a complex pituitary-brain-pituitary pathway.
Muhammad Rahmad Royan, Kjetil Hodne, Rasoul Nourizadeh-Lillabadi, Finn-Arne Weltzien, Christiaan Henkel, Romain Fontaine   +5 more
doaj   +1 more source

Gonadotropin Releasing Hormones and their Receptors in Avian Species

The Journal of Poultry Science, 2006
In all vertebrates, gonadotropin releasing hormone (GnRH) is a key component of the hypothalamo-pituitary-gonadal axis. In birds, two distinct forms of GnRH (cGnRH-I and cGnRH-II) have been characterized, and a third immunoreactive form similar to ...
Grégoy Y. Bédécarrats, Mamiko Shimizu, Daniel Guémené   +2 more
doaj   +1 more source

Disruption of Pituitary Gonadotrope Activity in Male Rats After Short- or Long-Term High-Fat Diets Is Not Associated With Pituitary Inflammation

Frontiers in Endocrinology, 2022
Overnutrition is associated with the activation of inflammatory pathways in metabolically linked organs and an early hypothalamic inflammation is now known to disrupt the central control of metabolic function. Because we demonstrated that fatty acids (FA)
Ghislaine Garrel, Claude Rouch, David L’Hôte, Salma Tazi, Nadim Kassis, Frank Giton, Julien Dairou, Pascal Dournaud, Pierre Gressens, Christophe Magnan, Céline Cruciani-Guglielmacci, Joëlle Cohen-Tannoudji   +11 more
doaj   +1 more source

Investigating the KNDy hypothesis in humans by co-administration of kisspeptin, neurokinin B and naltrexone in men [PDF]

Context: A subpopulation of hypothalamic neurons co-localise three neuropeptides namely kisspeptin, neurokinin B (NKB) and dynorphin collectively termed KNDy neurons. Animal studies suggest they interact to affect pulsatile GnRH release (KNDy hypothesis);
Abbara, A, Bassett, P, Bloom, S, COMNINOS, A, Dhillo, WS, Jayasena, C, Mizamtsidi, M, Narayanaswamy, S, Papadopoulou, D, Prague, J, Shah, A, Veldhuis, J   +11 more
core   +1 more source

Equine models in translational medicine: A comparative approach to human health

Animal Models and Experimental Medicine, EarlyView.
This diagram summarizes and contrasts rodent and equine models, outlining their strengths, limitations, and applications. Horses offer naturally occurring diseases, genetic and physiological similarities to humans, and suitability for longitudinal and clinical‐scale studies.
Shayan Boozarjomehri Amnieh, Katarzyna Ropka‐Molik   +1 more
wiley   +1 more source

Gonadotropin-releasing hormone agonist-induced pituitary apoplexy

Endocrinology, Diabetes & Metabolism Case Reports, 2016
Pituitary apoplexy represents an uncommon endocrine emergency with potentially life-threatening consequences. Drug-induced pituitary apoplexy is a rare but important consideration when evaluating patients with this presentation.
Fergus Keane, Aoife M Egan, Patrick Navin, Francesca Brett, Michael C Dennedy   +4 more
doaj   +1 more source

Follicle Stimulating Hormone in Cattle Breeding: Fundamentals, Innovations, and Scope

Animal Research and One Health, EarlyView.
FSH is crucial in cattle reproduction, with exogenous administration enhancing breeding and embryo production. Recombinant FSH offers advantages over pituitary‐extracted variants, including fewer injections, reduced stress, and safer production. These innovations improve breeding efficiency, optimize reproductive outcomes, and contribute to sustainable
Muhammad Shahzad, Hubdar Ali Kolachi, Jesse Oluwaseun Ayantoye, Xiaomeng Zhang, Muhammad Usman Mehmood, Rajilan Hilali Shanga, Pengcheng Wan, Xueming Zhao   +7 more
wiley   +1 more source