Abstract:
:Hypertonic glycerol injection is one of the most frequently used models of experimental acute renal failure. Late structural changes such as interstitial fibrosis in the renal cortex and tubular atrophy have been detected after severe acute tubular necrosis (ATN). The aim of this study was to investigate the expression of angiotensin II (AII) and endothelin during the evolution of the ATN induced by glycerol and their relationships with the late structural changes observed in the kidneys. Forty-nine male Wistar rats were injected with a 50% glycerol solution, 8 mL/kg, divided into equal amounts, each administered into one hind leg, and 18 with 0.15 M NaCl solution. Blood and urine samples were collected 1, 5, 30, and 60 days after the injections to quantify sodium and creatinine; the animals were killed and the kidneys removed for histologic and immunohistochemical studies. The results of the immunohistochemical studies were scored according to the extent of staining in the cortical tubulointerstitium. Glycerol-injected rats presented a transitory increase in plasma creatinine levels and in fractional sodium excretion. The immunohistochemical studies showed increased AII and endothelin staining in the renal cortex from rats killed 5 days after glycerol injection (p<0.001) compared with control that persisted until day 60. The animals killed on days 30 and 60 also presented chronic lesions (fibrosis, tubular dilatation, and atrophy) in the renal cortex, despite the recovery of renal function. AII and endothelin may have contributed to the development of renal fibrosis in these rats.
journal_name
Ren Failjournal_title
Renal failureauthors
de Jesus Soares T,Costa RS,de Mattos Coelho R,Alves da Silva CG,Coimbra TMdoi
10.1080/08860220500244781subject
Has Abstractpub_date
2005-01-01 00:00:00pages
757-62issue
6eissn
0886-022Xissn
1525-6049journal_volume
27pub_type
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