Effect of hyperphosphatemia on type IIa sodium-dependent phosphate cotransporter mRNA expression in the kidney of 5/6 nephrectomized rats and the interference of Renagel
- VernacularTitle:高血磷对5/6肾切除大鼠肾Ⅱa型钠-磷协同转运子基因表达的影响及司维拉姆的干预作用
- Author:
Ming ZENG
;
Xiaoyun WANG
;
Xiaobing WANG
;
Xiufen ZHAO
- Publication Type:Journal Article
- Keywords:
Cotransporter;
Phosphus;
Parathyroid hormone;
Renagel
- From:
Chinese Journal of Nephrology
2005;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of hyperphosphatemia on type Ⅱa sodium dependent phosphate cotransporter (NaPi-2)mRNA expression in the kidneys of 5/6 nephrectomized (STNx)rats and evaluate the interference of Renagel. Methods Forty-two male Sprague-Dawley rats underwent 5/6 nephrectomy or sham operation. The animals were then divided into seven groups: (1)STNx+high-Pi diet(HP) group (1.2%P); (2)STNx+low-Pi diet(LP) group(0.2%P); (3)STNx+ normal-Pi diet (NP) group; (4)STNx+HP+Renagel-treated (Ren)group; (5)sham+HP group; (6) sham+LP group; (7)sham+NP group. Serum ionized calcium (iCa) , phosphorus, and iPTH levels were detected at day 2,7,14.The kidneys were removed after the rats were sacrificed on day 14 and serum 1,25-(OH)2D3 and FEp were measured. RT-PCR was applied to examine NaPi-2 mRNA. Results Serum P and iPTH levels in STNx+HP group were significantly higher than those in STNx+ LP and 3 sham groups (P0.05)among these five groups mentioned above. Serum P and iPTH levels in Renagel-treated group were much lower than those in STNx+HP group (P
