Could a lupus drug help people with rare immune deficiency?

NCT ID NCT04097561

First seen Jan 05, 2026 · Last updated May 16, 2026 · Updated 20 times

Summary

This early-stage study tests whether belimumab, a drug used for lupus, is safe for people with idiopathic CD4 lymphopenia (ICL) — a rare condition where the body has too few CD4 immune cells, raising infection risk. About 20 adults aged 18-70 with ICL and autoantibodies will receive 8 doses of belimumab by IV over several months. The main goal is to check for side effects; researchers will also monitor immune cell counts to see if the drug has any helpful effects.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

    Contact Phone: •••-•••-•••• Email: •••••@•••••

Conditions

Explore the condition pages connected to this study.