Gene therapy offers hope for boys with severe immune disorder

NCT ID NCT01410019

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This trial tested a gene therapy for X-linked severe combined immunodeficiency (SCID-X1), a life-threatening condition where boys are born without a working immune system. Five boys who had no matching bone marrow donor received a single infusion of their own blood stem cells that were genetically corrected in a lab. The goal was to restore their immune defenses and help them fight infections normally.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance
autologous CD34+ cells modified with a self-inactivating gammaretroviral vector carrying the IL2RG gene
What this could lead to
If successful, this could provide a one-time treatment option for boys with SCID-X1 who lack a suitable bone marrow donor, potentially restoring their immune system.
What could go wrong
This is an early-phase trial with only 5 participants, so results may not apply to all patients. Gene therapy carries risks such as insertional mutagenesis or incomplete immune recovery.

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Conditions

The condition(s) this trial relates to.

Infections T-B+ severe combined immunodeficiency due to gamma chain deficiency X-Linked Combined Immunodeficiency Diseases

As listed by the trial registrant

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

Contacts and locations

Locations

  • Hopital Necker

    Paris, 75015, France

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