Abstract:
:This study was designed to evaluate the role of nitric oxide (NO) in FK506-induced nephrotoxicity by administering an inhibitor of NO synthesis, N omega-nitro-L-arginine methyl ester (L-NAME) to rats treated with FK506. After one week of treatment with FK506 (3.2 mg/kg/day, intramuscularly) and/or L-NAME (5 mg/100 mL of L-NAME in the drinking water), the arterial pressure, urinary NOx, and parameters for renal function were measured, and histological analysis of the kidney was made. In the L-NAME without FK506 group, L-NAME administration effectively inhibited urinary NOx excretion and increased mean arterial pressure (MAP) without any change in renal function. In the FK506 without L-NAME group, FK506 treatment showed increase in urinary NOx excretion and mild renal dysfunction. In the FK506 with L-NAME group, urinary NOx excretion was decreased by L-NAME administration and renal function was significantly worsened than FK506 without L-NAME group. The plasma creatinine, BUN and urinary N-acetyl-beta-D-glucosaminidase increased 2-, 3-, and 3-fold, respectively and the creatinine clearance was reduced by 50% as compared with that in the FK506 without L-NAME group. Histological analysis revealed severe interstitial fibrosis and tubular atrophy in the FK506 + L-NAME treatment group. Thus, results suggest that NO synthesis is enhanced in the kidney during FK506-induced nephrotoxicity and that NO synthesis inhibition aggravates FK506-induced nephrotoxicity. NO may play a protective role attributable to the balance of vasoactive substances in FK506-induced nephrotoxicity.
journal_name
Ren Failjournal_title
Renal failureauthors
Wang L,Kubodera S,Ueno A,Takeda Mdoi
10.1081/jdi-100001279subject
Has Abstractpub_date
2001-01-01 00:00:00pages
11-9issue
1eissn
0886-022Xissn
1525-6049journal_volume
23pub_type
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