Results 31 to 40 of about 24,396 (278)

Duplicated membrane estrogen receptors in the European sea bass (Dicentrarchus labrax): Phylogeny, expression and regulation throughout the reproductive cycle [PDF]

The numerous estrogen functions reported across vertebrates have been classically explained by their binding to specific transcription factors, the nuclear estrogen receptors (ERs).
Alvarado, M. Victoria, Andrade, André, Estêvão, M. Dulce, Felip, Alicia, Pinto, Patricia IS, Power, Deborah   +5 more
core   +1 more source

Detection of the GH Analogue Redalsomatropin Alfa in Sports Drug Testing: Immunological Approaches and LC‐HRMS/MS

Drug Testing and Analysis, EarlyView.
After evaluating the compatibility of the GH analogue redalsomatropin alfa with approved doping control immunoassays for rhGH, it was implemented into the existing detection method for somatrogon employing affinity purification with GHR‐Fc‐conjugated magnetic beads, tryptic digestion, and LC‐HRMS/MS to allow for a specific and sensitive detection ...
Katja Walpurgis, Andreas Thomas, Jasmin Thelen, Bettina Majer, Maneera Al‐Jaber, Wadha Abushareeda, Mario Thevis   +6 more
wiley   +1 more source

The role of mitogen-activated protein kinase–extracellular receptor kinase pathway in female fertility outcomes: a focus on pituitary gonadotropins regulation

Therapeutic Advances in Endocrinology and Metabolism, 2018
Mammalian reproduction systems are largely regulated by the secretion of two gonadotropins, that is, luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
Samira Kahnamouyi, Mohammad Nouri, Laya Farzadi, Masoud Darabi, Vahid Hosseini, Amir Mehdizadeh   +5 more
doaj   +1 more source

Menstruation in an infant: a case report of exacerbated mini-puberty

Portuguese Journal of Pediatrics, 2023
There are three periods throughout life in which an activation of the hypothalamus-pituitary-gonads axis takes place: prenatal, immediate postnatal period and puberty. The period that occurs after the first week of life and in which there are high levels
Carolina Amaro-Gonçalves, Ana Dias-Curado, Sofia G. Ferreira, Brígida Robalo, Lurdes Sampaio   +4 more
doaj   +1 more source

Analysis and Characterization of Kisspeptin and Its Analogues in Serum and Urine Samples by Liquid Chromatography–High‐Resolution Mass Spectrometry for Doping Control Purposes

Drug Testing and Analysis, EarlyView.
Sensitive LC‐HRMS methods were established for the detection of kisspeptin and its analogues in serum and urine, alongside their analytical and metabolic characterization. Stability studies were conducted in serum, plasma, and urine, highlighting the importance of appropriate sample handling for reliable anti‐doping analysis.
Sophia Krombholz, Linus Korsmeier, Andreas Thomas, Mario Thevis   +3 more
wiley   +1 more source

Neuroendocrine regulation of gonadotropin secretion in seasonally breeding birds

Frontiers in Neuroscience, 2013
Seasonally breeding birds detect environmental signals, such as light, temperature, food availability and presence of mates to time reproduction. Hypothalamic neurons integrate external and internal signals, and regulate reproduction by releasing ...
Takayoshi eUbuka, George E Bentley, Kazuyoshi eTsutsui   +2 more
doaj   +1 more source

Impact of an increased exposure with manganese and nickel on pituitary hormones in women with ovarian polycystosis

Репродуктивная эндокринология, 2020
Objective of the study: to evaluate the possible impact of manganese and nickel on the state of gonadotropic pituitary function and prolactin secretion. Materials and methods. For the study 2 groups of women were selected. The control group consisted of
М. Г. Проданчук, Т. Ф. Татарчук, С. В. Гуньков, П. Г. Жмінько, С. І. Регеда   +4 more
doaj   +1 more source

Novas perspectivas no diagnóstico do hipogonadismo pediátrico masculino: a importância do AMH como marcador de células de Sertoli [PDF]

Sertoli cells are the most active cell population in the testis during infancy and childhood. In these periods of life, hypogonadism can only be evidenced without stimulation tests, if Sertoli cell function is assessed.
Grinspon, Romina, Rey, Rodolfo Alberto
core   +1 more source

Goofy/123Cre lineage tracing differentiates olfactory and vomeronasal neurons from GnRH‐1 and terminal nerve neurons during neuronal migration and reveals additional olfactory placode‐derived cells in the brain

Developmental Dynamics, EarlyView.
Abstract The olfactory placode (OP) generates a broad array of chemosensory neurons in the nasal region, including olfactory sensory neurons, vomeronasal sensory neurons, neurons of the septal organ, and Grueneberg ganglion. During invagination, the OP also generates migratory neuronal populations, including gonadotropin‐releasing hormone‐1 (GnRH‐1 ...
Enrico Amato Jr., Mia V. Call, Noah M. LeFever, Mya Aviles‐Carlos, Nikki M. Dolphin, Paolo E. Forni   +5 more
wiley   +1 more source

FSH and LH Secretion from in-vitro Cultured Buffalo Anterior Pituitary Cells Following Treatment with Diethyl-Stilbestrol and Medroxy-Progesterone and Their Effects on Ovarian Activity and Hematological Variables of Female Rabbits [PDF]

Pakistan Veterinary Journal, 2016
Aims of this study were: to investigate whether FSH and LH secretion from in-vitro cultured buffalo adenohypophyseal cells can be increased by supplementing culture media with diethyl-stilbestrol and medroxy-progesterone, respectively; to monitor ...
Kaleem Iqbal1, Nafees Akhtar1*, Nazir Ahmad1 and Sajjad-ur-Rahman2
doaj