Nano-rheological Biomarkers for Patients With Sickle Cell Disease (SCD) Versus Control Subjects (Other Constitutional Red Blood Cell Diseases and Healthy Subjects)
DREPNANO
Single-center Pilot Study: Nano-rheological Biomarkers for Patients With Sickle Cell Disease (SCD) Versus Control Subjects (Other Constitutional Red Blood Cell Diseases and Healthy Subjects)
1 other identifier
observational
40
0 countries
N/A
Brief Summary
Numerous pathologies (sickle cell disease, thalassemia, spherocytosis, etc.) lead to changes in the rheological properties of the blood, in particular via alterations in the deformability of red blood cells. These alterations lead to circulatory complications of which an emblematic example is the sickle cell crisis which manifests itself by microcirculatory occlusions. Several authors suggest that the deformability of erythrocytes is a key parameter for the diagnosis and monitoring of patients. Numerous studies, especially in vitro, show that the mechanical properties of the red blood cell significantly influence its dynamics in flow (blood viscosity, distribution in capillary networks). Moreover, concerning the specific problem of vaso-occlusion, the proportion of the most rigid red blood cells is a determining factor of the probability of occlusion more than the average value of this rigidity which can hide great disparities. There is no clinically usable test to assess the alteration of the fine rheology of the red blood cell in a patient. Functional tests such as ektacytometry require heavy equipment and teams of specialized biologists; this technique is therefore only available in 3 biological reference centers in France. "Mechanical phenotyping" seems to be a potentially simpler and more accessible technique, and has already shown promising prospects in other nosological settings than red blood cell pathologies. Today, there is no specific marker of sickle cell vaso-occlusive crisis, nor marker of severity, that would be useful for pathophysiological understanding but also for clinical management.
Trial Health
Trial Health Score
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participants targeted
Target at P25-P50 for all trials
Started Oct 2022
Typical duration for all trials
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Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 25, 2022
CompletedFirst Posted
Study publicly available on registry
September 7, 2022
CompletedStudy Start
First participant enrolled
October 1, 2022
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 1, 2024
CompletedStudy Completion
Last participant's last visit for all outcomes
November 1, 2025
CompletedSeptember 22, 2022
July 1, 2022
1.4 years
July 25, 2022
September 20, 2022
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Study of the intra-erythrocyte viscosity dispersion and rheological profile of red blood cells
Measure of the intra-erythrocyte viscosity dispersion using molecular rotors technique, study of rheological profile of red blood cells in microfluidic circuit : measure of the speed of flowing, and DI deformability Index \[DI = (L-W)/(L+W)\] of each red blood cell, DI dispersion in each sample, in basal state and after exposure to deoxygenation cycles of blood SCD patients versus control subjects.
30 months
Secondary Outcomes (1)
Study of the intra-erythrocyte viscosity dispersion and rheological profile of red blood cells
24 months
Study Arms (3)
Healthy subjects
Subjects with no documented hematological pathology (neither constitutional nor acquired). From the recruitment of living kidney donors, transplantation unit of Grenoble Alpes University Hospital
SCD patients
Patients with SCD
Control patients
With a constitutional non-sickle cell disease of the red blood cell, or an acquired red blood cell disease.
Interventions
Eligibility Criteria
Study population will be patient with sickle cell disease (SCD) in comparaison of two populations : healthy volunteers (living donor of kidney) and patient with a constitutional non-sickle cell disease of the red blood cell, or an acquired red blood cell disease
You may qualify if:
- Patient age ≥ 18 years
- With social care protection
- Living donor recruited for kidney donation with normal blood count
- Patient age ≥ 18 years
- With social care protection
- SCD patient with documented phenotype: SS, S°, S+, SC, SLepore, SOrab, SDPundjab, ASantilles... with or without specific treatment
- Patient age ≥ 18 years
- With social care protection
- With any of the following conditions :
- Patient being managed for anemia due to martial deficiency, and prior to oral or intravenous replacement therapy
- Patient being followed for myeloproliferative syndrome at diagnosis, and prior to any specific treatment (hemodilution or hydroxycarbamide or other specific treatment)
- A patient with a MCGRE other than a major sickle cell syndrome, whether or not under specific treatment
- Hemoglobinopathy: transfusion-dependent or independent thalassemias (major or intermediate), thalassemias minor, heterozygous sickle cell trait A/S, other heterozygous hemoglobin variants (C, E, Lepore...), hyperaffine hemoglobin
- Membrane disorders (hereditary spherocytosis)
- Canalopathies (stomatocytosis with dehydrated or hyperhydrated erythrocytes, melanesian ovalocytosis...)
- +1 more criteria
You may not qualify if:
- Patient age \< 18 years
- Subject under guardianship, or subject deprived of freedom
- Linguistic or literacy status not allowing for informed consent despite patient information in "Easy to Read and Understand" format
- Known history of HIV, HTLV, syphilis, or positive serology and active viral hepatitis B or C.
- \) Treatment with hydroxycarbamide started less than 6 months ago 6) Anemia with hemoglobin level \<60g/l in the absence of cardiorespiratory pathology, \<70g/l in pregnancy, or in the presence of cardiorespiratory pathology that may alter the tolerance of anemia.
- \) Anemia with hemoglobin level \<60g/l, \<70g/l in pregnancy, or in the presence of cardio-respiratory pathology that may alter the tolerance of anemia.
- \) Diagnosis not finalized (in progress), or uncertain nosological framework, or diagnostic wandering.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Related Publications (30)
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PMID: 24404073BACKGROUND
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Caroline MAKOWSKI, mD
CHU Grenoble Alpes
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- CASE CONTROL
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 25, 2022
First Posted
September 7, 2022
Study Start
October 1, 2022
Primary Completion
March 1, 2024
Study Completion
November 1, 2025
Last Updated
September 22, 2022
Record last verified: 2022-07