Search Results - "Ceballos, Nora R."

Functional studies of p.R132C, p.R149C, p.M283V, p.E431K, and a novel c.652-2A>G mutations of the CYP21A2 gene by Taboas, Melisa, Gómez Acuña, Luciana, Scaia, María Florencia, Bruque, Carlos D, Buzzalino, Noemí, Stivel, Mirta, Ceballos, Nora R, Dain, Liliana

“…Congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency is the most frequent inborn error of metabolism and accounts for 90-95% of CAH cases. In…”
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Mechanism of hCG-induced spermiation in the toad Rhinella arenarum (Amphibia, Anura) by Volonteri, M. Clara, Ceballos, Nora. R

“…Research highlights ► Spermiation is not induced by inhibiting the Na+ /K+ ATPase in the absence of hCG. ► Ouabain inhibits hCG-induced spermiation but not…”
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Melatonin Inhibits Glucocorticoid Receptor Nuclear Translocation in Mouse Thymocytes by Presman, Diego M, Hoijman, Esteban, Ceballos, Nora R, Galigniana, Mario D, Pecci, Adali

“…The antiapoptotic effect of melatonin (MEL) has been described in several systems. In particular, MEL inhibits glucocorticoid-mediated apoptosis. Our group…”
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Characterization and seasonal changes in LHβ and FSHβ mRNA of Rhinella arenarum (Amphibia, Anura) by Volonteri, M. Clara, Regueira, Eleonora, Scaia, M. Florencia, Ceballos, Nora R

“…Highlights • Tetrapods studied conserve 12 cysteins and 1 (LH) or 2 (FSH) N-Glycosilation sites. • LHβ and FSHβ have three peaks along the year, in spring,…”
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Overcrowding-mediated stress alters cell proliferation in key neuroendocrine areas during larval development in Rhinella arenarum by Distler, Mijal J., Jungblut, Lucas D., Ceballos, Nora R., Paz, Dante A., Pozzi, Andrea G.

“…ABSTRACT Exposure to adverse environmental conditions can elicit a stress response, which results in an increase in endogenous corticosterone levels. In early…”
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5α-Reductase, an enzyme regulating glucocorticoid action in the testis of Rhinella arenarum (Amphibia: Anura) by Tesone, Amelia J, Regueira, Eleonora, Fabián Canosa, Luis, Ceballos, Nora R

“…Abstract The reduction of A-ring of glucocorticoids to produce 5α-dihydro-derivatives by 5α-reductases has been considered as a pathway of irreversible…”
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New lead compounds in the search for pure antiglucocorticoids and the dissociation of antiglucocorticoid effects by Pecci, Adali, Alvarez, Lautaro D., Veleiro, Adriana S., Ceballos, Nora R., Lantos, Carlos P., Burton, Gerardo

“…Antiglucocorticoids that act as antagonists at the glucocorticoid receptor (GR) level may be used to block or modulate the undesirable effects of…”
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Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity by Gomes, Aline D., Navas, Carlos A., Jared, Carlos, Antoniazzi, Marta M., Ceballos, Nora R., Moreira, Renata G.

“…The amphibian order Gymnophiona is poorly known, and studies about their reproduction are mainly comparative and descriptive, focusing on the structure of…”
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Cytosolic glucocorticoid receptor in the testis of Bufo arenarum: Seasonal changes in its binding parameters by Denari, Daniela, Ceballos, Nora R.

“…Glucocorticoids (GC) are the hormonal mediators of stress. In mammals, high levels of GC have negative effects on reproductive physiology. For instance, GC can…”
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Hexachlorobenzene as hormonal disruptor—studies about glucocorticoids: Their hepatic receptors, adrenal synthesis and plasma levels in relation to impaired gluconeogenesis by Lelli, Sandra M., Ceballos, Nora R., Mazzetti, Marta B., Aldonatti, Carmen A., San Martín de Viale, Leonor C.

“…In Wistar rats, hexachlorobenzene (HCB) depresses the gluconeogenic enzyme phosphoenolpyruvate-carboxykinase (PEPCK). In the liver, glucocorticoids (GC)…”
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Relationship between steroidogenesis and spermiation in Rana catesbeiana and Leptodactylus ocellatus by Rosemblit, Cinthia, Pozzi, Andrea G, Ceballos, Nora R

“…The present study employs an in vitro system to analyse the role of steroid hormones in hCG-induced spermiation in two species of anuran amphibian: Rana…”
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Seasonal Changes in the Activity of 11β-Hydroxysteroid Dehydrogenase in Toad Testes by DENARI, DANIELA, CEBALLOS, NORA R.

“…: In mammals, glucocorticoids (GC) are inactivated by the oxidative activity of 11β‐hydroxysteroid dehydrogenase (11β‐HSD). To study that mechanism in the…”
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Synthesis of 6,19-cyclopregnanes. Constrained analogues of steroid hormones by Di Chenna, Pablo H, Veleiro, Adriana S, Sonego, Juan M, Ceballos, Nora R, Garland, M Teresa, Baggio, Ricardo F, Burton, Gerardo

“…A procedure for the synthesis of 6,19-cyclopregnanes is described involving an intramolecular alkylation reaction of Delta(4)-3-keto steroids with a…”
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Steroid production in toads by Canosa, Luis F., Pozzi, Andrea G., Rosemblit, Cinthia, Ceballos, Nora R.

“…In Bufo arenarum, androgen biosynthesis occurs through a complete 5-ene pathway, including 5-androstane-3β,17β-diol as the immediate precursor of testosterone…”
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Effects of mGnRH on testicular steroidogenesis in the toad Bufo arenarum by Canosa, Luis F, Pozzi, Andrea G, Somoza, Gustavo M, Ceballos, Nora R

“…GnRH controls vertebrate reproduction in several ways. This hormone not only affects the secretion of gonadotropins from the pituitary gland but also has a…”
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Effect of Salt Acclimatization on 3β-Hydroxysteroid Dehydrogenase/Isomerase Activity in the Interrenal of Bufo arenarum by Pozzi, Andrea G., Lantos, Carlos P., Ceballos, Nora R.

“…In amphibians, aldosterone (Aldo) is particularly important in the regulation of Na+ exchange by skin and urinary bladder. In previous works we studied a key…”
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Kinetic properties of microsomal 3β hydroxysteroid dehydrogenase-isomerase from the testis of Bufo arenarum H by Pozzi, Andrea G., Canosa, Luis F., Calvo, Juan Carlos, Ceballos, Nora R.

“…3β-hydroxysteroid dehydrogenase 5-ene isomerase (3βHSD/I) activity is necessary for the biosynthesis of hormonally active steroids. A dual distribution of the…”
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Functional Studies of p.R132C, p.R149C, p.M283V, p.E431K, and a Novel c.652-2AG Mutations of the CYP21A2 Gene by Taboas, Melisa, Gómez Acuña, Luciana, Scaia, María Florencia, Bruque, Carlos D, Buzzalino, Noemí, Stivel, Mirta, Ceballos, Nora R, Dain, Liliana

“…Congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency is the most frequent inborn error of metabolism and accounts for 90-95% of CAH cases. In…”
Get full text

Overcrowding-mediated stress alters cell proliferation in key neuroendocrine areas during larval development in Rhinella arenarum: OVERCROWDING-MEDIATED STRESS IN AMPHIBIAN LARVAE by Distler, Mijal J., Jungblut, Lucas D., Ceballos, Nora R., Paz, Dante A., Pozzi, Andrea G.

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11β-Hydroxysteroid dehydrogenase in the testis of Bufo arenarum: Changes in its seasonal activity by Denari, Daniela, Ceballos, Nora R.

“…In rat Leydig cells, glucocorticoids (GC) inhibit testosterone (T) synthesis via glucocorticoid receptor (GR). However, GC access to GR is regulated by the…”
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