Evaluation of the Impact of Red Blood Cell Exchange on Thrombo-inflammation in Sickle Cell Disease (STIREX)

January 6, 2025 updated by: University Hospital, Toulouse

Evaluation of the Impact of Red Blood Cell Exchange on Thrombo-inflammation in Sickle Cell Disease STIREX : Sickle Cell Disease - Thrombo-Inflammation - Red Blood Cell EXchange

Sickle cell disease is the most common inherited blood disorder worldwide. It is a hemoglobinopathy characterized by chronic hemolysis, endotheliopathy, coagulation activation, and chronic inflammation. It is a multisystemic disease leading to acute (vaso-occlusive crisis, acute chest syndrome, stroke…) and chronic complications with multiorgan damage. Thrombo-inflammation is defined by the cooperation and interaction between hemostasis and the innate immune system. The platelet represents the cornerstone of this phenomenon, being at the interface of these two systems. In sickle cell disease, platelets are activated and release cytokines, leading to a pro-coagulant and pro-inflammatory state. Transfusion, whether occasional or chronic, is a major sickle cell disease treatment. It is common to distinguish simple transfusion from exchange transfusion. The latter involves replacing a given volume of sickle red blood cells with healthy red blood cells. Exchange transfusion allows avoiding an excessive increase in hemoglobin. The decrease of hemoglobin S under 30% achieved by red blood cell exchange reduces the risk of stroke by more than 90% in children with cerebral vasculopathy. Moreover, transfusion can be used in acute complications such as vaso-occlusive crisis and acute chest syndrome. Despite this efficacy, a subgroup of patients is not totally protected against acute and chronic complications. The persistence of chronic inflammation is suggested. To date, it is not known if red blood cell exchange can reduce the thrombo-inflammatory dynamic in sickle cell disease. The aim of this study is to evaluate the impact of red blood cell exchange on thrombo-inflammatory parameters in 20 adult sickle cell patients (10 patients on manual exchange and 10 patients on automatized exchange).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Prospective observational cohort with additional blood samples. This study is monocentric.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
20

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • France
      • Toulouse, France, 31059

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients will be identified during a follow-up consultation in the internal medicine department.

Description

Inclusion Criteria:

  • Sickled Cell Disease patient with SS or S/beta thalassemia genotype
  • Red blood cell exchange > 3 months
  • Up-to-date social security coverage
  • Patient able to understand the purpose and constraints of the research project
  • Patient has read the study information leaflet and does not object to the research.

Exclusion Criteria:

  • Thrombopenia < 50 G/L
  • Non-steroidal anti-inflammatory drugs < 7 days before enrolment
  • Anti-platelet agents < 7 days before enrolment
  • Pregnancy or breastfeeding
  • Patient objects to take part in the study
  • Patient under guardianship, curatorship or safeguard of justice
  • Patients with ongoing clinical trial requiring collection of additional blood samples

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Sickle patients treated by red blood cell exchange
20 adult sickle cell patients treated by red blood cell exchange (10 patients on manual exchange and 10 patients on automatized exchange)
Other: Red blood cell exchange
Red blood cell exchange manual exchange and automatized exchange

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Evaluation of thrombo-inflammation parameters in sickle patients treated by red blood cell exchange
Time Frame: 2 days
Thrombo-inflammation is evaluate using a composite criteria composed by 4 thromo-inflammatory parameters : soluble platelet activation markers, inflammasome, platelet response, circulating platelet microparticles and lipidomic study of plasma eicosanoids.
2 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University Hospital, Toulouse

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Etablissement Français du Sang

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Pierre Cougoul, MD, University Hospital, Toulouse

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 18, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 6, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 25, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 25, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 6, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RC31/24/0509

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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