Characterization of Autoreactive b Lymphocytes in Autoimmune Diseases and Immune Deficiencies (AutoB-Tetramer)

August 18, 2026 updated by: University Hospital, Strasbourg, France

Autoimmune diseases (AID), whether systemic or organ-specific, affect approximately one in ten people, and their prevalence continues to increase. Many AIDs are linked to the emergence of autoreactive B cells (BCs) directed against components of the self. In healthy individuals, these autoreactive B cells are counter-selected or regulated before reaching the antibody-secreting cell compartment. However, in predisposed individuals, a breakdown in B cell tolerance can occur, leading to the formation of autoantibodies with devastating consequences, such as the emergence of systemic lupus erythematosus (SLE), rheumatoid arthritis, and vasculitis. B-cell depletion is often beneficial in these patients, but paradoxically, therapies targeting B cells are not always effective. Furthermore, B cell depletion via LB-specific antibodies (anti-CD20) or treatment with CD19 chimeric antigen receptor T cells (CAR T) leads to complete and prolonged depression of the entire B compartment without targeting the LB population responsible for the onset of the disease. To date, two pitfalls in studies of human autoreactive LBs often complicate the interpretation of results:

i) the difficulty of identifying autoreactive LBs among all LBs, ii) demonstrating the pathogenicity of autoreactive B lymphocytes when they can be identified individually. We propose to quantify and phenotype these autoreactive/pathogenic B cells using high-throughput flow cytometry in several clinical situations.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
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

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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.
200

Contacts and Locations

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Study Contact

Study Contact

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Study Locations

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

Hôpitaux Universitaires de Strasbourg

Description

Inclusion Criteria:

  • Patients aged between 18 and 70
  • Patients for whom at least one of the following conditions has been confirmed:
  • Systemic lupus erythematosus meeting the 2019 ACR/EULAR classification criteria.
  • Systemic scleroderma meeting the 2013 ACR/EULAR classification criteria. ANCA-associated vasculitis according to the 2022 EULAR/ACR classification criteria.
  • Antiphospholipid syndrome according to the 2023 ACR/EULAR criteria.
  • Primary immunodeficiencies according to IUIS criteria.
  • Patients capable of understanding the objectives of the research.
  • Patients affiliated with a social security health insurance scheme (beneficiary or dependant).
  • Patients who have signed and dated the informed consent form for non-identifying genetic testing.

Exclusion Criteria:

  • Patient refusing to participate in the study
  • Patient in a period of exclusion (determined by a previous or ongoing study) Inability to provide the subject with informed consent (in an emergency or immediate life-threatening situation, difficulties in understanding the subject, etc.)
  • Patient under legal protection
  • Patient under guardianship or conservatorship

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.
Systemic lupus erythematosus
Biological: blood draw
blood draw
Systemic scleroderma
Biological: blood draw
blood draw
ANCA-associated vasculitis
Biological: blood draw
blood draw
Antiphospholipid syndrome
Biological: blood draw
blood draw
Primary immunodeficiencies
Biological: blood draw
blood draw

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
Time Frame
Study of the percentage of autoreactive LB / tetrameric LB+
Time Frame: inclusion visit
inclusion visit

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, Strasbourg, France

Study record dates

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Study Major Dates

Study Start (Actual)

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 20, 2026

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 31, 2031

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.
December 31, 2031

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, 2025

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.
November 18, 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.
November 26, 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.
August 20, 2026

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.
August 18, 2026

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.
August 1, 2026

More Information

Terms related to this study

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.
  • 9942 (CTEP)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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