- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT00067990
Angiotensin II Blockade for Chronic Allograft Nephropathy
Angiotensin II Blockade for the Prevention of Cortical Interstitial Expansion and Graft Loss in Kidney Transplant Recipients
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Detaillierte Beschreibung
Renal transplant loss due to chronic allograft nephropathy (CAN) is widely acknowledged as a major problem that has increased in relative importance as the incidence of early graft loss from acute rejection has declined. Studies from various centers, including the University of Minnesota, suggest that, after excluding patients dying with a functioning graft, as many as 80% of patients who will return to dialysis do so because of CAN. At the present time there are no therapeutic options once the clinical manifestations of CAN have developed. Testing measures to prevent CAN have not been addressed.
The overall purpose of this project is to investigate the role of the renin-angiotensin-aldosterone system (RAAS) in the development of CAN. This system plays an important role in the progression of many experimental and clinical renal diseases. Furthermore, blockade of this system with angiotensin converting enzyme inhibitors and angiotensin II receptor blockers has yielded beneficial results in retarding injury and progression in numerous intrinsic renal diseases. This study specifically investigates the long term benefit of the angiotensin II receptor blocker, losartan, in the prevention of cortical interstitial volume expansion (an accurate predictor of long term graft function) and graft loss from biopsy proven CAN in a 5 year, randomized, double masked, placebo controlled study of kidney transplant recipients. This clinical trial will directly test the hypothesis that blockade of the renin angiotensin aldosterone system will provide a substantial benefit through blood pressure lowering independent mechanisms, namely, interruption of fibrogenic pathways, anti-proteinuric actions, amelioration of hyperfiltration and possibly some immunomodulatory effects.
The proposed studies will also characterize the interstitial ultrastructural compositional changes that occur in the renal allografts with CAN, the effects of treatment on these changes and provide a complete description of the incidence and predictors for the development of transplant glomerulopathy. These studies will also determine the impact of angiotensin II receptor blockade on the rate of decline of glomerular filtration rate, as well as the impact of glomerular size on the rate of graft loss from CAN, the incidence and the progression of post transplant proteinuria, the nature of the permselectivity defects responsible for the proteinuria and will also explore the association of proteinuria with graft loss from CAN. This trial will also help construct a profile for the RAAS in the transplant recipients and explore the relationship between two genes polymorphisms, ACE and TGF-Beta, and CAN.
These studies should help to describe the natural history, nature and pathogenesis of CAN, elucidate early markers and predictors of this important disorder and, perhaps, define a safe and useful preventative strategy.
Studientyp
Einschreibung (Tatsächlich)
Phase
- Phase 4
Kontakte und Standorte
Studienorte
-
-
Minnesota
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Minneapolis, Minnesota, Vereinigte Staaten, 55415
- Hennepin County Medical Center
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Minneapolis, Minnesota, Vereinigte Staaten, 55455
- University of Minnesota
-
-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Age > 18 years.
- Recipients of a first or a second renal transplant alone or in combination with a pancreas transplantation.
- Informed consent
- Adequate baseline biopsy; at least 10 cortical projection fields.
Exclusion Criteria:
- Age < 18 years.
- Serum creatinine 2.5mg/dL.
- Persistent hyperkalemia; potassium > 5.4 mEq/L.
- Known hypersensitivity to losartan or iodine allergy.
- Documented renal artery stenosis by duplex ultrasonography.
- Recipients of grafts from an HLA-identical sibling.
- Recipients whose primary renal disease is primary hyperoxaluria,dense-deposit disease, focal segmental glomerulosclerosis or hemolytic uremic syndrome.
- Women of childbearing age who wish to become pregnant and/or are unwilling to use contraceptive measures or who are pregnant.
- Recipients requiring ACE inhibitors or AII blockers for a cardiovascular indication (e.g. systolic dysfunction).
- Recipients who are > 55 years old and had a history of cardiovascular disease (coronary artery disease, stroke or peripheral vascular disease).
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Verhütung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Verdreifachen
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
---|---|
Experimental: Losartan 100mg
Losartan 100 mg per day to be started within three months of transplantation and continuing treatment for five years.
|
To be started within three months of transplant and continued for five years.
Andere Namen:
|
Placebo-Komparator: Placebo
No intervention with continuing follow-up for five years.
|
No treatment with continued follow-up for five years.
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
---|---|---|
Doubling of Interstitium or Any ESRD
Zeitfenster: Baseline to 5 years
|
Doubling of the interstitial or any defined ESRD (including IF/TA)
|
Baseline to 5 years
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
---|---|---|
Number of Participants With Cortical Interstitial Volume Expansion or Any ESRD
Zeitfenster: Baseline and 5 Years Post Transplant
|
Number of subjects who had doubling of the interstitial or any end stage renal disease (ESRD) not attributed to interstitial fibrosis and tubular atrophy (IF/TA)
|
Baseline and 5 Years Post Transplant
|
Mitarbeiter und Ermittler
Sponsor
Mitarbeiter
Ermittler
- Hauptermittler: Hassan N. Ibrahim, M.D., M.S., University of Minnesota
- Hauptermittler: Bertram Kasiske, M.D., Hennepin County Medical Center, Minneapolis
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- Ibrahim HN, Jackson S, Connaire J, Matas A, Ney A, Najafian B, West A, Lentsch N, Ericksen J, Bodner J, Kasiske B, Mauer M. Angiotensin II blockade in kidney transplant recipients. J Am Soc Nephrol. 2013 Feb;24(2):320-7. doi: 10.1681/ASN.2012080777. Epub 2013 Jan 10.
- Kukla A, Issa N, Jackson S, Spong R, Foster MC, Matas AJ, Mauer MS, Eckfeldt JH, Ibrahim HN. Cystatin C enhances glomerular filtration rate estimating equations in kidney transplant recipients. Am J Nephrol. 2014;39(1):59-65. doi: 10.1159/000357594. Epub 2014 Jan 18.
- Issa N, Ortiz F, Reule SA, Kukla A, Kasiske BL, Mauer M, Jackson S, Matas AJ, Ibrahim HN, Najafian B. The renin-aldosterone axis in kidney transplant recipients and its association with allograft function and structure. Kidney Int. 2014 Feb;85(2):404-15. doi: 10.1038/ki.2013.278. Epub 2013 Aug 21. Erratum In: Kidney Int. 2015 Jan;87(1):243. Najafian, Behzad [Added].
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- ANGIOB
- R01DK060706 (US NIH Stipendium/Vertrag)
Plan für individuelle Teilnehmerdaten (IPD)
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Beschreibung des IPD-Plans
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