- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05850156
Study of a Deformability Parameter of Red Blood Cell (FITRED)
Study of a Deformability Parameter of Red Blood Cell. FITRED
Sickle-cell disease is one of the most common severe monogenic disorders in the world, it results in the synthesis of abnormal hemoglobin (HbS) instead of hemoglobin A. When deoxygenated, the sickle haemoglobin (HbS) polymerizes inducing the sickling of red blood cells (RBCs) and leading to decreased deformability and increased fragility. Therefore, sickle RBCs exhibit a reduced lifespan associated with intravascular hemolysis, hemolytic anemia and low tissue oxygenation. Sickle RBCs, which exhibit abnormal adhesive properties to endothelial cells, can block the microcirculation, causing the occurrence of painful vaso-occlusive crisis (VOC), acute chest syndrome (ACS), acute and chronic organ damage (heart, lung, liver, spleen, kidney, bone…) and shortened life span.
A preliminary study performed on RBC from sickle cell patients (Hb SS) has shown an alteration of a parameter measuring the overall deformability of RBCs by evaluating the nature of their movement in a shear flow. This parameter is significantly lower in sickle cell patients in steady state compared to a population of healthy individuals. The parameter is also significantly lower in sickle cell patients during VOC when compared to patient in steady state.
The main objective of this study is to evaluate the performance of the method for measuring the deformability of RBCs on an experimental prototype. Measurements will be performed on blood samples from subjects with a normal hemoglobin electrophoretic profile, from heterozygous carriers of sickle cell disease and from patients with sickle cell disease. Samples from paediatric patients will also be tested to study any specificity in comparison to adult subjects.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Catherine BADENS, Pr
- Phone Number: 04 91 38 77 87
- Email: catherine.badens@ap-hm.fr
Study Contact Backup
- Name: Anais Maugard
- Phone Number: 04 91 43 51 86
- Email: anais.maugard@ap-hm.fr
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Repeatability of ftt (mechanical marker of deformability) measurements
Exclusion Criteria:
- Effect of ambient temperature on ftt measurements
- Effect of sample processing time on ftt measurements
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Adult sickle cell patients
In the context of routine care, 3 blood collection will be performed on adult sickle cell patients for the analysis of hemoglobin fractions.
For each blood collection, an additional volume of blood will be taken for the research purposes.
|
blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
6 months +/- 2 months after inclusion, a blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
12 months +/- 2 months after inclusion, a blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
|
pediatric sickle cell patients
In the context of routine care, 3 blood collection will be performed on pediatric sickle cell patients for the analysis of hemoglobin fractions.
For each blood collection, an additional volume of blood will be taken for the research purposes.
|
blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
6 months +/- 2 months after inclusion, a blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
12 months +/- 2 months after inclusion, a blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
|
Adult sickle cell carriers (heterozygous patients)
In the context of neonatal screening for sickle cell disease, the parents will be called altogether with their children in order to check if they are sickle cell carriers or not.
Only 1 blood collection will be performed for this group.
|
blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
|
Control patients
In the context of neonatal screening for sickle cell disease, the parents will be called altogether with their children in order to check if they are sickle cell carriers or not.
Only 1 blood collection will be performed for this group.
|
blood collection is performed in the context of routine care for hemoglobin analysis.
An additional volume of 300µL of blood is taken for the purposes of the study
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
repeatability of fTT measurements
Time Frame: 14 months
|
A series of 10 measurements of a deformability of red blood cells parameter (fTT) on the same blood sample will be performed successively within 24 hours for 4 samples (2 from sickle cell patient and 2 from control or heterozygous patients).
The repeatability of the measurements will be determined from these measurements and the effect of a variation in the total number of red blood cells will be analyzed.This study will be reproduced on several blood samples and the measurements will be repeated under the same conditions 24 hours later.
|
14 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Effect of ambient temperature during fTT measurement
Time Frame: 14 months
|
Tests will be conducted to evaluate the effect of ambient temperature on the measurement of a series of 4 samples at ambient temperature (from 18 to 30°C).
|
14 months
|
Effect of the processing time on fTT measurement
Time Frame: 14 months
|
test will be conducted to measure the fTT on a series of 10 samples, twice a day during the 2 first days an then every day for 5 days.
|
14 months
|
Correlation of ftt with the collected data
Time Frame: 14 months
|
A correlation study of ftt with socio-demographic (age and sex), biological (results of hemogram and hemoglobin electrophoresis) and clinical (number of vaso-occlusive crises and treatment with Hydroxyurea) will be conducted.
|
14 months
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- RCAPHM22_0433
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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