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Antiproteinuric efficacy of fosinopril after renal transplantation is determined by the extent of vascular and tubulointerstitial damage.

Abstract：

BACKGROUND:Angiotensin converting enzyme (ACE) inhibitors have been successfully used for treatment of proteinuria after renal transplantation (RTx). Factors possibly responsible for the great inter-patient variance of the antiproteinuric effect (APE) have not yet been investigated in renal-transplanted patients. METHODS:28 patients after RTx with a persistent proteinuria of more than 1.25 g/d were treated prospectively with does of fosinopril (10-15 mg/d) which were not effective on systemic arterial blood pressure. Prior to initiation of fosinopril, renal graft biopsy was performed in all patients and renal graft artery stenosis was excluded by duplex ultrasound. Serum creatinine and proteinuria were measured prior to, as well as 3 and 8 months after initiation of ACE inhibition, mean arterial pressure was controlled via 24-h measurement and repeated spot measurements. Reduction of proteinuria was correlated with renal histology, serum creatinine, creatinine clearance, mean arterial blood pressure, sodium excretion before therapy and the relative changes of these parameters during therapy respectively. RESULTS:Therapy had to be stopped in 8/28 patients due to side effects including rise of serum creatinine (n = 4). Three patients were excluded due to non-compliance. In the remaining patients (n = 17) proteinuria was reduced from 2.94 +/- 1.66 to 1.82 +/- 1.39 and 2.48 +/- 3.05 g/d after 3 and 8 months respectively, in the mean +/- SD. There was a significant inverse correlation between the APE and the extent of benign nephrosclerosis, interstitial fibrosis and tubular atrophy. No correlation of the APE to any of the other parameters could be demonstrated. CONCLUSIONS:Fosinopril can be administered effectively in a subgroup of proteinuric renal transplant recipients. However, because of a high proportion of patients developing side effects, careful monitoring is obligatory. Our results show that the lesser the degree of chronic morphological injury, the greater is the antiproteinuric effect. Thus, the degree of pre-existing histologically proven damage of the graft may serve as an indicator for the antiproteinuric efficacy of ACE inhibitor therapy after RTx.

journal_name

Clin Transplant

journal_title

Clinical transplantation

authors

Lufft V,Kliem V,Hamkens A,Bleck JS,Eisenberger U,Petersen R,Ehlerding G,Maschek H,Pichlmayr R,Brunkhorst R

subject

Has Abstract

pub_date

1998-10-01 00:00:00

pages

409-15

issue

eissn

0902-0063

issn

1399-0012

journal_volume

pub_type

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Antiproteinuric efficacy of fosinopril after renal transplantation is determined by the extent of vascular and tubulointerstitial damage.