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Mostrando ítems 11-20 de 1219
The juvenile hormone described in Rhodnius prolixus by Wigglesworth is juvenile hormone III skipped bisepoxide
(Nature Research, 2020-02)
Juvenile hormones (JHs) are sesquiterpenoids synthesized by the corpora allata (CA). They play critical roles during insect development and reproduction. The frst JH was described in 1934 as a “metamorphosis inhibitory ...
Androgens downregulate anti-Müllerian hormone promoter activity in the Sertoli cell through the androgen receptor and intact steroidogenic factor 1 sites
(Society for the Study of Reproduction, 2018-12)
Testicular anti-Müllerian hormone (AMH) production is inhibited by androgens around pubertal onset, as observed under normal physiological conditions and in patients with precocious puberty. In agreement, AMH downregulation ...
Interaction between hydrogen sulfide and hormones in plant physiological responses
(Springer, 2019-01)
The gasotransmitter, hydrogen sulfide (H 2 S) is involved in plant growth and development, and stress responses. Plant hormones influence the levels of endogenous H 2 S and H 2 S may affect the biosynthesis, transport, and ...
Effects of exogenous sex hormones on mouse estrous cycle, vaginal microbiota and immune cells
(Springer, 2018-06)
Sex hormones are oft en administered to mice in vaginal microbial studies in order to synchronize estrous. Our objective was to evaluate the effect of estradiol-hemi succinate (EH) or medroxyprogest erone-acetate (MPA) ...
Menstruación y anticoncepción hormonal: cuando la regularidad se vuelve mandatoMenstruation and hormonal contraception: when regularity becomes a mandate
(Límbica, 2021-05)
En el texto que sigue se exponen hallazgos preliminares de una investigación doctoral en curso, centrada en las trayectorias y las experiencias de usuarias de anticonceptivos hormonales orales. En concreto, este trabajo ...
Same Phenotype in Children with Growth Hormone Deficiency and Resistance
(Hindawi Publishing Corporation, 2018-04)
By definition, about 2.5% of children show a short stature due to several causes. Two clinical conditions are characterized by serum IGF-I low levels, idiopathic GH deficiency (IGHD), and GH insensitivity (GHI), and the ...
Genotyping of resistance to thyroid hormone in South American population. Identification of seven novel missense mutations in the human thyroid hormone receptor β gene
(Academic Press Ltd - Elsevier Science Ltd, 2009-06)
Thyroid Hormone Receptor β (THRB) defects, typically transmitted as autosomal dominant traits, cause Resistance to Thyroid Hormone (RTH). We analyzed the THRB gene in thirteen South American patients with clinical evidence ...
Orcokinins regulate the expression of neuropeptide precursor genes related to ecdysis in the hemimetabolous insect Rhodnius prolixus
(Pergamon-Elsevier Science Ltd, 2018-07)
Ecdysis is a vital process for insects, during which they shed the old cuticle in order to emerge as the following developmental stage. Given its relevance for survival and reproduction, ecdysis is tightly regulated by ...
Pituitary–thyroid axis development during the larval–juvenile transition in the pejerrey Odontesthes bonariensis
(Wiley Blackwell Publishing, Inc, 2017-09)
The morphological development of the thyroid gland of pejerrey Odontesthes bonariensis during larval–juvenile transition was studied and related to whole-body concentrations of thyroxine (T4) and tri-iodothyronine (T3). A ...
Degradation of alfa-melanocyte-stimulating hormone photosensitized by pterin
(Royal Society of Chemistry, 2014-04)
Oxidized pterins, efficient photosensitizers under UV-A irradiation, accumulate in the skin of patients suffering from vitiligo, a chronic depigmentation disorder. In this work, we have investigated the ability of pterin ...