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Diagnosis of Acute Rejection in Renal Transplant Patients by Urine Mass Spectrometry

9 augustus 2017 bijgewerkt door: Wilfried Gwinner, Hannover Medical School

Non-invasive Diagnosis of Acute Rejection in Renal Transplant Patients Using Mass Spectrometry of Urine Samples - a Multicentre Diagnostic Phase III Trial

Reliable and timely detection of acute rejections in renal transplant patients is important to preserve the graft function and to prevent premature graft failure. The current gold standard for the rejection diagnosis is a renal biopsy which is usually performed upon an unexplained decline in the graft function (determined by serum creatinine or clearance). Because of the insensitivity of creatinine determinations and the invasiveness of renal biopsies, non-invasive tests have been suggested to diagnose acute rejection including mass spectrometry (MS) analysis of urine samples.

The ability of MS analysis to detect acute rejection has been demonstrated in small studies on selected patients but evidence is lacking that this test is efficacious in the routine setting of the post-transplant patient care. Based on our previous work that established urine peptide sets for acute rejection by MS, a prospective, multicentre diagnostic phase III study will be executed.

The aim of the study is to prove that this test is as equally effective as the allograft biopsy to detect acute rejection in patients that undergo a biopsy for unexplained renal dysfunction. The perspective of this approach is that the test could be used either in place of the biopsy or as decision guidance whether a biopsy is necessary to confirm the presence of rejection. Another perspective is that the MS test (respectively, a simplified test system derived from this method) could be used in the regular post-transplant surveillance for acute rejection, in place of the relatively insensitive procedure with periodic monitoring of the graft function by creatinine determinations.

Studie Overzicht

Toestand

Voltooid

Conditie

Afwijzing van niertransplantatie

Studietype

Observationeel

Inschrijving (Werkelijk)

600

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

Duitsland
- - Aachen, Duitsland, 52074
    - RTW University of Aachen
  - Berlin, Duitsland, 10117
    - Charité Universitätsmedizin Berlin
  - Erlangen, Duitsland, 90154
    - University of Erlangen-Nuremberg
  - Essen, Duitsland, 45147
    - Universitätsklinikum Essen
  - Hannover, Duitsland, 30625
    - Hannover Medical School
  - Jena, Duitsland, 07747
    - Universitatsklinikum Jena
  - Köln, Duitsland, 51109
    - Kliniken der Stadt Koln gGmbH
  - München, Duitsland, 81377
    - Ludwig-Maximilians-Universitätsklinik München

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar en ouder (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Bemonsteringsmethode

Kanssteekproef

Studie Bevolking

Patients with a kidney or combined kidney/pancreas transplantation from several German transplant centres with an acute unexplained allograft dysfunction within the first year of transplantation who require a clinically indicated allograft biopsy

Beschrijving

Inclusion Criteria:

Adult patients with a kidney or combined kidney/pancreas transplantation
Unexplained renal allograft dysfunction within the first year of transplantation
Renal allograft biopsy, which is clinically indicated to verify or exclude an acute rejection

Exclusion Criteria:

Lacking consent of the patient to participate in the study

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
Ability of the urine mass spectrometry test to diagnose acute renal allograft rejection, compared to the gold standard 'allograft biopsy' Tijdsspanne: Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)	In patients with unexplained renal allograft dysfunction who get an allograft biopsy to clarify if an acute rejection is present, a simultaneous urine sample will be taken. The peptide pattern of this urine sample is analyzed by mass spectrometry and a diagnosis is made (rejection present/not present) based on a pre-defined peptide pattern which was established to detect acute allograft rejection. In the primary outcome analysis, the sensitivity and specificity of the rejection diagnosis by the urine test is compared to the diagnosis made by the allograft biopsy.	Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)

Secundaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
Sensitivity and specificity of the urine test to diagnose acute renal allograft rejection in subgroups with different severity grades of the rejection Tijdsspanne: Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)	Sensitivity/specificity measures for the urine test will be determined in subgroups of patients with different severity of the rejection. Severity grading is based on the pathomorphological classification of the rejection (according to the BANFF classification) and on the functional impairment of the allograft at the time of rejection diagnosis.	Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)
Sensitivity and specificity of the urine test to diagnose acute renal allograft rejection in subgroups with kidney transplantation alone and with combined pancreas/kidney transplantation Tijdsspanne: Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)	Sensitivity/specificity measures for the urine test will be determined in subgroups of patients who have a kidney transplant or a combined pancreas/kidney transplant.	Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)
Sensitivity and specificity of the urine test to diagnose acute renal allograft rejection in subgroups with concurrent infection Tijdsspanne: Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)	Sensitivity/specificity measures for the urine test will be determined in subgroups of patients who have concurrent infections at the time of the biopsy and urine sampling such as cytomegaly virus, polyoma virus, and urinary tract infection. The analysis intends to identify potential interference of these conditions with the urine mass spectrometry test.	Results of the urine test will be assessed in relation to the simultaneously performed allograft biopsy (1 day)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Hannover Medical School

Onderzoekers

Hoofdonderzoeker: Wilfried Gwinner, Prof. /MD, Hannover Medical School

Publicaties en nuttige links

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Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start

1 oktober 2011

Primaire voltooiing (Werkelijk)

1 maart 2017

Studie voltooiing (Werkelijk)

15 juni 2017

Studieregistratiedata

Eerst ingediend

14 maart 2011

Eerst ingediend dat voldeed aan de QC-criteria