Document Detail


L-arginine reverses severe nephrosclerosis in aged spontaneously hypertensive rats.
MedLine Citation:
PMID:  10100103     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: Acute and prolonged effects of L-arginine on systemic and renal hemodynamics and on renal pathological changes were examined in 85-week-old spontaneously hypertensive rats (SHR). RESULTS: After 3 weeks of L-arginine administration (n = 9; 2 g/l in drinking water), mean arterial pressure remained unchanged, although the cardiac index increased (187 +/- 26 versus 263 +/- 15 ml/min per kg; P < 0.05) and total peripheral resistance decreased (1.15 +/- 0.18 versus 0.67 +/- 0.06 AU; P < 0.05); the glomerular filtration rate increased (0.41 +/- 0.07 versus 0.79 +/- 0.07 ml/min; P < 0.01). Control untreated, aged SHR (n = 10) demonstrated severe nephrosclerosis histologically, but those treated with L-arginine demonstrated a markedly reduced glomerular injury score (164 +/- 22 versus 83 +/- 9; P < 0.005), and their urinary protein excretion (39 +/- 5 versus 19 +/- 5 mg/100 g body weight per day; P < 0.05) and serum creatinine concentration (1.4 +/- 0.1 versus 0.9 +/- 0.1 mg/dl; P < 0.05) diminished. Intravenous L-arginine (300 mg/kg body weight) given to untreated SHR reduced mean arterial pressure, increased the cardiac index (+98 versus +1%; P < 0.05) and decreased total peripheral resistance (+56 versus +13%, P < 0.005); however, these variables remained unchanged after 3 weeks of L-arginine treatment. CONCLUSIONS: Three weeks of treatment with L-arginine improved systemic hemodynamics, renal function and renal histologic changes in aged SHR with naturally occurring nephrosclerosis. These data provide an important insight into the pathophysiology of nephrosclerosis in hypertension and with aging, which is seen clinically.
Authors:
H Ono; Y Ono; E D Frohlich
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of hypertension     Volume:  17     ISSN:  0263-6352     ISO Abbreviation:  J. Hypertens.     Publication Date:  1999 Jan 
Date Detail:
Created Date:  1999-05-26     Completed Date:  1999-05-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8306882     Medline TA:  J Hypertens     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  121-8     Citation Subset:  IM    
Affiliation:
Hypertension Research Laboratories, Alton Ochsner Medical Foundation, New Orleans, Louisiana, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arginine / administration & dosage,  therapeutic use*
Blood Pressure / drug effects
Follow-Up Studies
Glomerular Filtration Rate / drug effects
Hypertension / drug therapy*,  pathology,  physiopathology
Injections, Intravenous
Male
Nephrosclerosis / drug therapy*,  pathology,  physiopathology
Organ Size
Rats
Rats, Inbred SHR
Severity of Illness Index
Vascular Resistance / drug effects
Chemical
Reg. No./Substance:
74-79-3/Arginine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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