Experimental mRNA inhalation therapy targets rare lung disease
NCT ID NCT06600425
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This early-phase study tests an inhaled mRNA therapy called RCT1100 in 7 adults with primary ciliary dyskinesia caused by DNAI1 gene mutations. The goal is to see if the treatment is safe and can help restore ciliary function in the lungs. It is a small, open-label trial focused on safety and preliminary effectiveness.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- RCT1100 mRNA therapy
- What this could lead to
- If successful, this could point toward a treatment that improves ciliary function and respiratory symptoms in people with primary ciliary dyskinesia.
- What could go wrong
- This is a very early, small Phase 1b study with only 7 participants, so results may not apply broadly. The therapy is still experimental and safety is the main focus.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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7 people
The number who actually took part.
- Started
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Sep 2024
- Finished
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Aug 2025
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Major Inclusion Criteria: * Healthy, adult, male or female of, 18-70 years of age, inclusive, at screening. * Participant has clinical diagnosis of PCD and disease-causing mutations in the DNAI1 gene * Participant has a forced expiratory volume in one second (FEV1) of at least 50% predicted. Major Exclusion Criteria: * History or presence of clinically significant medical, surgical, clinical laboratory, or psychiatric condition or disease. * History of cancer, with exception of adequately treated basal cell or squamous cell carcinoma of the skin. * Predisposition to bleeding or clinically meaningful hemorrhagic event in the 12 months prior * Medically significant hemoptysis. * Anticoagulation therapy for the treatment of a pulmonary embolus or has had a pulmonary embolus in the last 6 months of screening. * Active tuberculosis infection. * 12-lead ECG with QT interval \>450 msec (or \>480 msec for BBB) * Laboratory abnormalities in clinical laboratory tests at screening: 1. Serum creatinine level 2. Total bilirubin, aspartate aminotransferase or alanine aminotransferase values 3. Hematological or coagulation values outside the normal reference range * Any medical history of disease that has the potential to cause a rise in total bilirubin over the ULN. * COVID-19 infection within 4 weeks of Screening or receipt of COVID-19 vaccine within 2 weeks prior to first dose of RCT1100. * Receipt of vaccine with live virus, attenuated live virus, or live viral components within 2 weeks prior to first dose of RCT1100 or to receive these vaccines during treatment or within 8 weeks of completion of study treatment. Other protocol defined inclusion/exclusion criteria may apply.
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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
Locations
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Royal Brompton Hospital
London, SW3 6NP, United Kingdom
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University Hospital Southampton NHS Foundation Trust
Southampton, SO16 6YD, United Kingdom
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