Tiny study probes why antibiotic may tame rare vasculitis
NCT ID NCT03919435
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looks at how the antibiotic TMP-SMX changes the bacteria and fungi living in the noses of people with granulomatosis with polyangiitis (GPA), a rare autoimmune disease. Researchers want to understand why this antibiotic helps prevent disease flare-ups. Eight adults with GPA and a history of sinus problems will take TMP-SMX for 4 weeks, and their nasal microbiome will be tracked over 6 months using swabs and optional blood draws.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Trimethoprim-sulfamethoxazole (TMP-SMX), an antibiotic pill
What this could lead to
If successful, this study could reveal whether TMP-SMX prevents GPA relapses by killing bacteria or by reducing inflammation, guiding better treatments.
What could go wrong
This is a very small, early-phase study with only 8 participants, so results may not apply to all GPA patients. It is designed to observe changes, not to test a new treatment.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Perelman Center for Advanced Medicine
Philadelphia, Pennsylvania, 19104, United States