Data/hora: 06/06/2024 05:28:22

Provedor de dados: 	56	
País: 	Brazil	
Título: 	Roles of estrogen and progesterone in modulating renal nerve function in the rat kidney	
Autores: 	Graceli,J.B.; Cicilini,M.A.; Bissoli,N.S.; Abreu,G.R.; Moysés,M.R.	
Data: 	2013-06-01	
Ano: 	2013	
Palavras-chave: 	Estrogen; Na+ and Cl- reabsorption; Progesterone; Renal nerve.	
Resumo: 	The maintenance of extracellular Na+ and Cl- concentrations in mammals depends, at least in part, on renal function. It has been shown that neural and endocrine mechanisms regulate extracellular fluid volume and transport of electrolytes along nephrons. Studies of sex hormones and renal nerves suggested that sex hormones modulate renal function, although this relationship is not well understood in the kidney. To better understand the role of these hormones on the effects that renal nerves have on Na+ and Cl- reabsorption, we studied the effects of renal denervation and oophorectomy in female rats. Oophorectomized (OVX) rats received 17β-estradiol benzoate (OVE, 2.0 mg·kg-1·day-1, sc) and progesterone (OVP, 1.7 mg·kg-1·day-1,sc). We assessed Na+ and Cl-fractional excretion (FENa+ and FECl-, respectively) and renal and plasma catecholamine release concentrations. FENa+, FECl-, water intake, urinary flow, and renal and plasma catecholamine release levels increased in OVX vs control rats. These effects were reversed by 17β-estradiol benzoate but not by progesterone. Renal denervation did not alter FENa+, FECl-, water intake, or urinary flow values vs controls. However, the renal catecholamine release level was decreased in the OVP (236.6±36.1 ng/g) and denervated rat groups (D: 102.1±15.7; ODE: 108.7±23.2; ODP: 101.1±22.1 ng/g). Furthermore, combining OVX + D (OD: 111.9±25.4) decreased renal catecholamine release levels compared to either treatment alone. OVE normalized and OVP reduced renal catecholamine release levels, and the effects on plasma catecholamine release levels were reversed by ODE and ODP replacement in OD. These data suggest that progesterone may influence catecholamine release levels by renal innervation and that there are complex interactions among renal nerves, estrogen, and progesterone in the modulation of renal function.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000600521	
Editor: 	Associação Brasileira de Divulgação Científica	
Relação: 	10.1590/1414-431X20132666	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Medical and Biological Research  v.46 n.6 2013	
Fonte: 	info:eu-repo/semantics/openAccess