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New Hemolysis Parameters in Sickle Cell Disease (HEMODREP)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT03040908
Recruitment Status : Unknown
Verified February 2019 by Queen Fabiola Children's University Hospital.
Recruitment status was:  Not yet recruiting
First Posted : February 2, 2017
Last Update Posted : February 12, 2019
Information provided by (Responsible Party):
Queen Fabiola Children's University Hospital

Brief Summary:

The 6-minute walk (6MWT) test is used in adults and children affected by a wide range of chronic diseases to evaluate their sub-maximal exercise capacity. It reflects the global response of various physiological systems (respiratory, cardio-vascular, neurologic, metabolic and musculosquelettic) in a situation simulating a daily life activity. In children with sickle cell disease, the 6MWT is correlated with a low level of hemoglobin, a low level of fetal hemoglobin and low red cell deformability. Our team previously reported that in a population of children with sickle cell disease, highly treated with hydroxyurea, the sole factor which was independently linked to the 6MWT was the presence of silence infarct.

As the cardio-vascular and cerebro-vascular injury in sickle cell disease are directly correlated with hemolysis, the investigators aim to evaluate a) the clinical relevance of endothelial and inflammation parameters and new hemolysis markers and b) if the presence of silent infarct and the 6MWT are correlated with this biological markers.

This cross-sectional study will include sickle cell disease patients regularly followed for more than 5 years at Hôpital Universitaire des Enfants Reine Fabiola, Centre Hospitalier Universitaire (CHU)-Brugmann, Centre Hospitalier Etterbeek-Ixelles, CHU Saint-Pierre, Cliniques Universitaires Saint-Luc (Bruxelles, Belgium). Inclusion criteria are: sickle cell disease (SS, Sbeta°, SC, Sbeta+), age range : 6 to 25 years, signed informed consent. Exclusion criteria are: transplanted patients, inability to perform the 6MWT (severe cognitive disability, femoral osteonecrosis with functional impairment), hospitalization and/ or transfusion in the last 3 months for acute event.

Demographic data and clinical data will be retrospectively recorded. Blood test and 6MWT will be performed in steady state. Studied analysis will be: coagulation factors, free hemoglobin, Pro-B type natriuretic peptide (Pro-BNP), High sensitivity C reactive protein (HS-CRP), Intercellular Adhesion Molecule (ICAM), Vascular Cell Adhesion Molecule (VCAM) and Selectins.

With this study, the investigators expect to validate new predictive markers for cardio-vascular or cerebrovascular injury and to identify patients at high risk to develop these complications.

Condition or disease
Sickle Cell Disease

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Study Type : Observational
Estimated Enrollment : 150 participants
Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Evaluation de la capacité Physique Sous Maximale au Moyen du Test de Marche de 6 Minutes Des Enfants et Adultes Jeunes Suivis Pour drépanocytose et Nouveaux paramètres d'hémolyse : Vers Une prédiction Des Complications Vasculaires ?
Estimated Study Start Date : September 1, 2019
Estimated Primary Completion Date : September 1, 2021
Estimated Study Completion Date : March 1, 2022

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Correlation between new biological data and clinical phenotype [ Time Frame: 2 years ]
    The primary outcome of this study is to validate the relationship between these new biological markers and the clinical phenotype.

Secondary Outcome Measures :
  1. Correlation between new biological data and 6-minute walk test [ Time Frame: 2 years ]
    The secondary outcome is to confirm the correlation between the 6-minute walk test and the presence of silent infarct and to explore the relationship between these new markers and the 6-minute walk test.

Information from the National Library of Medicine

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Ages Eligible for Study:   6 Years to 25 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Children and young adults with Sickle Cell Disease

Inclusion Criteria:

  • Sickle Cell Disease (HbSS, S beta°, S beta+, SC)
  • Regular follow-up from more than 5 years
  • Written informed consent

Exclusion Criteria:

  • Transplanted patients
  • Hospitalisation for an acute event within 3 months
  • Acute transfusion within 3 months
  • Unable to performed 6-minute walk test

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03040908

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Contact: Laurence Dedeken, MD +3224773469 laurence.dedeken@huderf.be
Contact: Bernard Wenderickx +3224773654 bernard.wenderickx@huderf.be

Sponsors and Collaborators
Queen Fabiola Children's University Hospital
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Responsible Party: Queen Fabiola Children's University Hospital
ClinicalTrials.gov Identifier: NCT03040908    
Other Study ID Numbers: P2016/ONCO-HEMATO/HEMODREP
First Posted: February 2, 2017    Key Record Dates
Last Update Posted: February 12, 2019
Last Verified: February 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Additional relevant MeSH terms:
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Anemia, Sickle Cell
Anemia, Hemolytic, Congenital
Anemia, Hemolytic
Hematologic Diseases
Genetic Diseases, Inborn