English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/16808
Título

Effects of endocrine disrupters on sex steroid synthesis and metabolism pathways in fish

AutorThibaut, Rémi; Porte Visa, Cinta
Palabras claveEndocrine disrupters
17β-HSD
5α-Reductase
20α/β-HSD
UGT
Estradiol-SULT
Fish
Fecha de publicacióndic-2004
EditorElsevier
CitaciónJournal of Steroid Biochemistry and Molecular Biology 92(5): 485-494 (2004)
ResumenThe interactions of estrogenic (nonylphenol, dicofol, atrazine), androgenic (organotins, phthalates, fenarimol) and anti-androgenic compounds (vinclozolin, diuron, p,p′-DDE) with key enzymatic activities involved in both synthesis and metabolism of sex hormones was investigated. Carp testicular microsomes incubated in the presence of androstenedione and different xenobiotics evidenced higher sensitivity of 5α-reductase activity than 17β-hydroxysteroid dehydrogenase activity towards those chemicals. Dicofol, organotins and phthalates were among the most effective inhibitors. In contrast, ovarian synthesis of maturation-inducing hormones (20α- and 20β-hydroxysteroid dehydrogenase activities) were enhanced by nonylphenol, dicofol, fenarimol and p,p′-DDE. Metabolic clearance pathways of hormones were also affected. Fenarimol, nonylphenol and triphenyltin inhibited the glucuronidation of testosterone and estradiol at concentrations as low as 10, 50 and 100 μM, respectively. Triphenyltin, tributyltin and nonylphenol were also inhibitors of estradiol sulfation with IC50 values of 17, 18 and 41 μM. Overall, the data indicates the interaction of selected chemicals with key enzymatic pathways involved in both synthesis and metabolism of sex hormones. This interference might be one of the underlying mechanisms for the reported hormonal disrupting properties of the tested compounds, and might finally affect physiological processes such as gamete growth and maturation.
Descripción10 pages, 5 figures, 1 table.-- PMID: 15698553 [PubMed].
Versión del editorhttp://dx.doi.org/10.1016/j.jsbmb.2004.10.008
URIhttp://hdl.handle.net/10261/16808
DOI10.1016/j.jsbmb.2004.10.008
ISSN0960-0760 (Print)
1879-1220 (Online)
Aparece en las colecciones: (IDAEA) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.