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Effect of Strict Blood Pressure Control and ACE-Inhibition on Progression of Chronic Renal Failure in Pediatric Patients (ESCAPE)

11 stycznia 2010 zaktualizowane przez: Heidelberg University

Molecular Mechanisms of Disease Progression and Renoprotective Pharmacotherapy in Children With Chronic Renal Failure

In children with chronic kidney disease, progression to end-stage renal failure is associated with high patient morbidity and poor quality of life. In adults, inhibition of the renin angiotensin system (RAS) slows down the rate of renal failure progression. This concept is as yet unproven in children, in whom chronic renal failure (CRF) is more commonly due to hypo/dysplastic malformations than to acquired glomerulopathies as typical for adult chronic kidney disease. The current project aims at assessing the genetic and molecular mechanisms and cardiovascular consequences of progressive CRF and to develop a strategy of pharmacological renoprotection in children.

Przegląd badań

Szczegółowy opis

Chronic kidney diseases affecting the nephron mass are characterized by a progressive decline of glomerular filtration rate (GFR) occurring irrespectively of the cause of the renal damage once a critical number of nephrons has been lost. Current clinical research efforts focus on preventive strategies to slow down or arrest disease progression. Systemic hypertension and glomerular hyperfiltration with resulting proteinuria and activation of vasoactive, profibrotic and proinflammatory systems have been identified as major causes of further nephron damage. Angiotensin converting enzyme (ACE) inhibitors are not only potent antihypertensive agents but also reduce proteinuria, glomerulosclerosis and tubulointerstitial fibrosis via reduction of the local angiotensin tone in the kidney, and have been demonstrated to slow down renal failure progression in adult patients. Childhood-onset ESRD is a rare but particularly devastating disease with poor life expectancy and quality of life. Chronic renal failure in children is caused by a different spectrum of nephropathies than in adults, with a preponderance of congenital or inherited abnormalities. Since hypertension, proteinuria and tubulointerstitial fibrosis are also common in pediatric chronic renal failure, there is a rationale for pharmacological renoprotection by ACE inhibition in children. The prospective, randomized European clinical trial launched by our consortium will provide the critical mass to assess several aspects of renoprotective therapy in children. Specifically, the trial is designed to address the following scientific objectives:

Objective 1 is to evaluate whether ACE inhibition is equally effective in slowing down the progression rate of chronic renal failure in children with different congenital and acquired renal disorders. 400 pediatric patients will be stratified according to their underlying diseases, and the rate of loss in glomerular filtration rate will be assessed from 6 months before to 5 years after start of treatment with the ACE inhibitor ramipril.

Objective 2 of the trial is to evaluate whether renal failure progression in patients treated with a fixed dose of ramipril can be further slowed down by additional antihypertensive treatment, achieving a blood pressure below the 50th percentile. To this end, patients will be randomized upon initiation of ramipril to either intensified (aiming below 50th percentile of 24-hour mean arterial pressure) or conventional antihypertensive treatment.

Several gene polymorphisms have been described that may affect the rate of renal failure progression and/or the individual susceptibility to ACE inhibition. These polymorphisms include genes encoding for key proteins of the renin-angiotensin system and extracellular matrix turnover. In addition, we will screen for novel polymorphisms in genes determining structural proteins of the glomerular filter, and search for gene mutations causing renal hypo-/dysplasia. Objective 3 is to evaluate whether any of these mutations predict spontaneous disease progression and the therapeutic response to ACE inhibition and intensified blood pressure control.

Glomerular endothelin (ET1) synthesis is upregulated in chronic renal failure, and urinary ET1 excretion is correlated with disease progression. ET1 antagonists partially preserve renal function and decrease proteinuria independent of the angiotensin tone. Objective 4 of the trial is to assess ET1 turnover before and after start of ACE inhibition, and to evaluate a possible predictive role of ET1 and/or ET1 degrading peptidase excretion for the persistence of proteinuria and disease progression during ACE inhibition and intensified antihypertensive therapy.

Long-term survival of children with chronic renal failure is compromised by precocious atherosclerosis and excessive cardiovascular morbidity. Objective 5 is to assess and correlate prospectively the metabolic causes and morphological consequences of uremic cardiovascular disease in children, and to define their relationship with disease progression during ACE inhibition and intensified blood pressure control. Homocysteine metabolism, apolipoprotein variability, gene polymorphisms putatively involved in atherosclerosis, inflammation states, myocardial function and carotid intima-media thickness will be assessed and compared to a reference group of age-matched healthy children.

Typ studiów

Interwencyjne

Zapisy (Rzeczywisty)

400

Faza

  • Faza 3

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Lokalizacje studiów

      • Paris, Francja, 75015
        • Hopital Necker, Division of Pediatric Nephrology
      • Paris, Francja, 75015
        • Inserm U574
      • Strasbourg, Francja, 67098
        • Hopiteaux Universitaires de Strasbourg
      • Adana, Indyk, 01330
        • Cukurova University School of Medicine, Dept. of Pediatric Nephrology
      • Ankara, Indyk, 06100
        • Hacettepe University, Faculty of Medicine, Pediatric Nephrology and Rheumatology
      • Istanbul, Indyk, 34303
        • Istanbul University, Cerrahpasa Medical Faculty, Dept, of Pediatrics
      • Istanbul, Indyk, 34390
        • University of Istanbul, Istanbul Medical Faculty, Dept. of Pediatrics
      • Izmir, Indyk, 35100
        • Ege University Medical Faculty, Dept. of Pediatric Nephrology
      • Vilnius, Litwa, 2600
        • Vilnius University Children's Hospital, Pediatric Department, Nephrology Unit
      • Berlin, Niemcy, 13353
        • Humboldt University Berlin, Charité Children's Hospital, Department of Pediatric Nephrology
      • Essen, Niemcy, 45122
        • University Hospital Essen, Department of Pediatrics, Pediatric Nephrology Unit
      • Hamburg, Niemcy, 20246
        • University Hospital Hamburg-Eppendorf, University Children's Hospital, Dept. of Pediatric Nephrology
      • Hannover, Niemcy, 30623
        • Hannover Medical School, Children's Hospital Div. II, Pediatric Nephrology
      • Heidelberg, Niemcy, 69120
        • Division of Pediatric Nephrology, Children's Hospital, University of Heidelberg
      • Leipzig, Niemcy, 04129
        • Urban Hospital St. Georg, Department of Pediatrics, Pediatric Nephrology Unit
      • Mainz, Niemcy, 55131
        • Johannes Gutenberg University Mainz, Department of Pediatrics,
      • Marburg, Niemcy, 35037
        • Philipps University Marburg, Dept. of Pediatrics
      • Rostock, Niemcy, 18050
        • University Children's Hospital, Dept. of Nephrology
      • Cracow, Polska, 30-663
        • Jagellonian University Medical College, Department of Pediatric Nephrology
      • Gdansk, Polska, 80-211
        • Medical University of Gdansk, Pediatric Nephrology Department
      • Szczecin, Polska, 71-344
        • Clinic of Pediatrics, Pomeranian Academy of Medicine
      • Warsaw, Polska, 04-736
        • Children's Memorial Health Hospital, Nephrology and Kidney Transplantation Department
      • Porto, Portugalia, 4202 - 451
        • Hospital S. Joao-Faculade de Medicina do Porto, Dept. of Pediatrics
      • Prague, Republika Czeska, 150 18
        • University Hospital Motol, 1st Department of Pediatrics
      • Belgrade, Serbia, 11000
        • Faculty of Medicine Belgrade, University Children's Hospital, Nephrology Unit
      • Zürich, Szwajcaria, 8032
        • University Children's Hospital, Nephrology Unit
      • Stockholm, Szwecja, 14186
        • Karolinska Institute, Huddinge University Hospital, Dept. of Pediatrics
      • Budapest, Węgry, 1083
        • Semmelweis University Budapest, 1st Department of Pediatrics
      • Genoa, Włochy, 16148
        • G.Gaslini Institute, Nephrology Unit
      • Milano, Włochy, 20122
        • Azienda Ospedaliera, Istitui Clinici di Perfezionamento, Servizio die Emodialisi Pediatrica
      • Padova, Włochy, 35128
        • Azienda Ospedaliera die Padova. U.O. Nefrologia Dialisi e Trapianto - Dipartimento di Pediatria
      • Rome, Włochy, 00165
        • Ospedale Pediatrico Bambino Gesù, Division of Nephrology and Dialysis
      • Torino, Włochy, 10126
        • Ospedale Infantile Regina Margherita, U.O.A. Nefrologia, Dialisi, Trapianto

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

3 lata do 18 lat (Dziecko, Dorosły)

Akceptuje zdrowych ochotników

Nie

Płeć kwalifikująca się do nauki

Wszystko

Opis

Inclusion Criteria:

  • Age 3-18 years
  • Moderate state of renal failure (creatinine clearance 15 - 75 ml / min / 1.73 m²)
  • Mean arterial blood pressure (ABPM) > 50.percentile and/or antihypertensive treatment
  • Written informed consent

Exclusion Criteria:

  • Age <3 years or >18 years at start of study
  • Unstable clinical condition (vomiting, anorexia, etc) or superimposed important disease
  • Unilateral or bilateral renal artery stenosis
  • Urological surgery possibly affecting renal function expected during study period
  • Insufficient compliance with prescribed antihypertensive medication during the run-in period
  • Secondary renal diseases such as lupus, amyloidosis and primary hyperoxaluria, and patients treated with immunosuppressive agents (including corticosteroids)
  • Severe primary cardiac disease, hepatic insufficiency and malabsorption syndrome
  • Erythropoietin or growth hormone therapy with a duration of less than 3 months prior to run-in period
  • Pregnancy

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Leczenie
  • Przydział: Randomizowane
  • Model interwencyjny: Przydział równoległy
  • Maskowanie: Brak (otwarta etykieta)

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Aktywny komparator: Conventional BP Control
Targeted 24-hour mean arterial pressure will be the 50th-95th percentile for age.
ACE inhibitor ramipril (6 mg/m²/day) will be given to all subjects.
Inne nazwy:
  • Delix
Any antihypertensive drugs except ACE inhibitors and angiotensin receptor blockers will be allowed.
In patients who show persistent or breakthrough proteinuria at the end of the initial study period, telmisartan (50 mg/m²/day) will be added to the existing medication.
Inne nazwy:
  • Micardis
Eksperymentalny: Intensified BP Control
Targeted 24-hour mean arterial pressure will be the 5th to 50th percentile for age.
ACE inhibitor ramipril (6 mg/m²/day) will be given to all subjects.
Inne nazwy:
  • Delix
Any antihypertensive drugs except ACE inhibitors and angiotensin receptor blockers will be allowed.
In patients who show persistent or breakthrough proteinuria at the end of the initial study period, telmisartan (50 mg/m²/day) will be added to the existing medication.
Inne nazwy:
  • Micardis

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Ramy czasowe
Time interval to renal 'loss' as defined by an absolute decrease in creatinine clearance by 50 % or attainment of renal replacement therapy.
Ramy czasowe: two-monthly
two-monthly

Miary wyników drugorzędnych

Miara wyniku
Ramy czasowe
Effect of treatment on urinary protein excretion
Ramy czasowe: two-monthly
two-monthly
Effect of treatment on blood pressure
Ramy czasowe: two-monthly
two-monthly
Safety of treatment
Ramy czasowe: initially weekly, than two-monthly
initially weekly, than two-monthly

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Śledczy

  • Główny śledczy: Franz Schaefer, MD, University of Heidelberg, Children's Hospital
  • Główny śledczy: Otto Mehls, MD, University of Heidelberg, Children's Hospital

Publikacje i pomocne linki

Osoba odpowiedzialna za wprowadzenie informacji o badaniu dobrowolnie udostępnia te publikacje. Mogą one dotyczyć wszystkiego, co jest związane z badaniem.

Publikacje ogólne

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów

1 stycznia 1998

Zakończenie podstawowe (Rzeczywisty)

1 lipca 2007

Ukończenie studiów (Rzeczywisty)

1 stycznia 2010

Daty rejestracji na studia

Pierwszy przesłany

15 września 2005

Pierwszy przesłany, który spełnia kryteria kontroli jakości

15 września 2005

Pierwszy wysłany (Oszacować)

22 września 2005

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Oszacować)

12 stycznia 2010

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

11 stycznia 2010

Ostatnia weryfikacja

1 stycznia 2010

Więcej informacji

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .

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