High perfusion pressure accelerates renal injury in salt-sensitive hypertension. J Am Soc Nephrol 2008 Aug;19(8):1472-82
Date
04/18/2008Pubmed ID
18417720Pubmed Central ID
PMC2488259DOI
10.1681/ASN.2007121271Scopus ID
2-s2.0-49649100283 (requires institutional sign-in at Scopus site) 89 CitationsAbstract
Renal injury in the Dahl salt-sensitive rat mimics human salt-sensitive forms of hypertension that are particularly prevalent in black individuals, but the mechanisms that lead to the development of this injury are incompletely understood. We studied the impact of renal perfusion pressure (RPP) on the development of renal injury in this model. During the development of salt-induced hypertension over 2 wk, the RPP to the left kidney was maintained at control levels (125 +/- 2 mmHg) by continuous servocontrol inflation of an aortic balloon implanted between the renal arteries; during the same period, the RPP to the right kidney rose to 164 +/- 8 mmHg. After 2 wk of a 4% salt diet, DNA microarray and real-time PCR identified genes related to fibrosis and epithelial-to-mesenchymal transition in the kidneys exposed to hypertension. The increased RPP to the right kidney accounted for differences in renal injury between the two kidneys, measured by percentage of injured cortical and juxtamedullary glomeruli, quantified proteinaceous casts, number of ED-1-positive cells per glomerular tuft area, and interstitial fibrosis. Interlobular arteriolar injury was not increased in the kidney exposed to elevated pressure but was reduced in the control kidney. We conclude that elevations of RPP contribute significantly to the fibrosis and epithelial-to-mesenchymal transition found in the early phases of hypertension in the salt-sensitive rat.
Author List
Mori T, Polichnowski A, Glocka P, Kaldunski M, Ohsaki Y, Liang M, Cowley AW JrAuthor
Allen W. Cowley Jr PhD Professor in the Physiology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsBlood Pressure
Fibrosis
Gene Expression Profiling
Hypertension
Kidney
Male
Metabolic Networks and Pathways
Oligonucleotide Array Sequence Analysis
Rats
Rats, Inbred Dahl
Sodium Chloride, Dietary
