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Immune cell clues: could t-cells explain hidden CVID complications?

NCT ID NCT07255157

Knowledge-focused Sponsor: University Hospital, Bordeaux Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Aug 06, 2026 · Updated 2 times

Summary

This study looks at why some people with Common Variable Immunodeficiency (CVID) develop complications not caused by infections. Researchers will test whether a type of immune cell called peripheral helper T-cells (Tph) helps faulty B-cells produce antibodies that lead to these complications. The study involves 60 adults with CVID and aims to understand the disease better, not to test a new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2026

Expected to finish

Jan 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male or female; * Age ≥ 18 years; * Standard criteria will be applied to diagnose CVID, specifically requiring: 1) low serum IgG level \<5 g/L, combined with low IgM- and/or IgA-isotype concentrations \<0.4 g/L or \<0.7 g/L, respectively; 2) poor antibody responses to immunization or infection; and 3) exclusion of other defined forms of secondary hypogammaglobulinemias. Patients meeting the definitional criteria for CVID will be included, regardless of the duration of the disease or the treatment received (gammaglobulins substitution or not); * Being affiliated to health insurance; * Willing to participate and to sign informed consent. Exclusion Criteria: * Patients on corticosteroids and/or immunosuppressants; * Patients with a primary immunodeficiency genetically characterized, such as Bruton disease our HyperIgM syndrome; * Patients with an active chronic infection; * Pregnant or breastfeeding women; * Persons deprived of their liberty by a judicial or administrative decision, minors, persons of legal age who are the object of a legal protection measure or unable to express their consent.

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Conditions

The condition(s) this trial relates to.

common variable immunodeficiency

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Common variable immunodeficiency

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • CHU de Bordeaux - service de médecine interne

    RECRUITING

    Pessac, France

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