Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Ex vivo testing of JAK inhibitors and a gene-therapy approach for JAK-STAT related immune disorders

Official title: Ex Vivo Evaluation of JAK-inhibitor and Gene Therapeutical Approach in JAK-STAT Related Disorders (JAKarta Study)

Run by Universitaire Ziekenhuizen KU Leuven · NCT07261891 · Data updated 2026-11-12

This project will try JAK-inhibitor drugs and a gene-therapy approach on blood samples from adults with JAK-STAT pathway primary immunodeficiencies and healthy controls to see how immune cells and gene expression change.

More Primary Immunodeficiency Diseases (PID) trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment20 (estimated)
SponsorUniversitaire Ziekenhuizen KU Leuven
Academic / other
Locations1 site (Leuven, Vlaams-Brabant)
StatusRecruiting
StartedNovember 21, 2024
Main results expectedDecember 1, 2028
Study endsDecember 1, 2030
Registry record updatedDecember 3, 2025
Trial IDNCT07261891 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18+) with genetically confirmed or highly suspected disorders causing exaggerated JAK-STAT signaling, such as STAT1 gain-of-function, as well as healthy volunteers for control samples, are the ideal candidates.

Probably not a fit

Children under 18, people unwilling to give consent, and patients whose disease is not driven by JAK-STAT hyperactivity are unlikely to benefit from participation.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Researchers will take blood samples from adults with genetically confirmed or suspected JAK-STAT pathway disorders (including STAT1 gain-of-function) and from healthy controls and expose bulk and sorted immune cells ex vivo to different JAK inhibitors. They will measure pSTAT signaling, transcriptional profiles, and cytokine production after stimulation to see which cell types normalize and which remain refractory. The team will also test the technical feasibility of a gene-therapeutic correction strategy for STAT1 GOF in patient cells outside the body. Findings will be used to map treatment blind spots and inform whether specific JAK inhibitors or gene approaches warrant further clinical development.

Why it matters

Potential benefit: If successful, the work could identify which JAK inhibitors most effectively normalize immune signaling and show whether a gene-therapy approach is technically feasible, guiding personalized treatment development.

How similar studies have gone: Clinical use of JAK inhibitors (e.g., ruxolitinib) has shown benefit in some STAT1 GOF patients, but ex vivo profiling and gene-therapy testing for this indication remain novel and less established.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Cases (A): adult patients presenting with a genetically confirmed or highly suspected disorder leading to an exagerated JAK-STAT pathway.
* Controls (B): participants eligible for inclusion in this study must fall in one of the following categories:
* Healthy controls (without immune-mediated disease)

Exclusion Criteria:

* Children (\< 18 years at time of recruitment)
* Persons unable or unwilling to give informed consent

Where it's running

  • University Hospitals Leuven,
    Leuven, Vlaams-Brabant, Belgium
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.