Experimental drug aims to rebuild immunity against fatal brain virus

NCT ID NCT04781309

First seen Nov 01, 2025 · Last updated May 15, 2026 · Updated 27 times

Summary

This study tested a drug called NT-I7 in 12 adults with progressive multifocal leukoencephalopathy (PML), a rare and serious brain infection caused by a virus. People with PML often have low levels of immune cells (lymphopenia), making it hard to fight the infection. The goal was to see if NT-I7 could safely increase those immune cells and help control the disease. Participants received up to 3 injections and were followed for 12 to 19 months.

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Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

Conditions

Explore the condition pages connected to this study.