A Study to Access Activity and Safety With SAR445399 Compared With Placebo in Participants Aged 18 to 80 Years of Age With Non-Cystic Fibrosis Bronchiectasis

A Randomized, Double-blinded, Placebo-controlled, Parallel Group, Phase 2a Study to Assess the Activity, Safety, and Tolerability of SAR445399 in Adult Participants With Non-Cystic Fibrosis Bronchiectasis (NCFB)

A Study to Access Activity and Safety With SAR445399 Compared With Placebo in Participants Aged 18 to 80 Years of Age With Non-Cystic Fibrosis Bronchiectasis (NCT07547436) is a Phase 2 interventional studying Non-cystic Fibrosis Bronchiectasis, sponsored by Sanofi. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

About This Trial

What Stage of Research Is This?

Phase 2 trials evaluate whether a treatment actually works against Non-cystic Fibrosis Bronchiectasis and continue monitoring side effects. Phase 2 enrolls larger groups (typically 100–300 patients) and produces the first real efficacy signal. A successful Phase 2 readout is what unlocks the much larger Phase 3 confirmatory trials needed for FDA approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 70 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Non-cystic Fibrosis Bronchiectasis subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: - Participants must be 18 to 80 years of age inclusive, at the time of signing the willing to sign a consent form - Clinical history consistent with NCFB, such as chronic productive cough and/or recurrent respiratory infections - Documented evidence of at least 2 PEx defined as episodes requiring a physician-prescribed course of antibiotics (oral and/or IV) for ≥5 days for signs and symptoms of respiratory infection within the 12 months prior to the Screening Visit - Radiologic evidence of bronchiectasis, confirmed by a chest HRCT - A minimum MPS of 4 (out of maximum 18) on chest HRCT performed before Baseline Visit - Current sputum production with a documented history of chronic expectoration lasting ≥3 months within the previous 12 months - Participants must have a post-bronchodilator FEV1 ≥30% of predicted normal value Who Should NOT Join This Trial: - A primary diagnosis of smoking-related COPD or asthma as determined by the Investigator. Participants with comorbid smoking-related COPD may be included if bronchiectasis is confirmed as their primary diagnosis and is the predominant cause of their respiratory symptoms - Diagnosis of ABPA or any of the allergic bronchopulmonary mycoses - Active NTM lung infection or incomplete NTM treatment course - Bronchiectasis due to any of the following: CF, CVID, AAT or PCD - History of significant hemoptysis (requiring medical intervention and/or requiring blood transfusion) - Current tobacco smokers - Known or suspected immunosuppression, including history of invasive opportunistic infections (eg., histoplasmosis, listeriosis, coccidioidomycosis, pneumocystosis, aspergillosis), despite infection resolution, or otherwise recurrent infections of abnormal frequency, or prolonged infections suggesting an immune-compromised status, as judged by the Investigator ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language

Inclusion Criteria: * Participants must be 18 to 80 years of age inclusive, at the time of signing the informed consent * Clinical history consistent with NCFB, such as chronic productive cough and/or recurrent respiratory infections * Documented evidence of at least 2 PEx defined as episodes requiring a physician-prescribed course of antibiotics (oral and/or IV) for ≥5 days for signs and symptoms of respiratory infection within the 12 months prior to the Screening Visit * Radiologic evidence of bronchiectasis, confirmed by a chest HRCT * A minimum MPS of 4 (out of maximum 18) on chest HRCT performed before Baseline Visit * Current sputum production with a documented history of chronic expectoration lasting ≥3 months within the previous 12 months * Participants must have a post-bronchodilator FEV1 ≥30% of predicted normal value Exclusion Criteria: * A primary diagnosis of smoking-related COPD or asthma as determined by the Investigator. Participants with comorbid smoking-related COPD may be included if bronchiectasis is confirmed as their primary diagnosis and is the predominant cause of their respiratory symptoms * Diagnosis of ABPA or any of the allergic bronchopulmonary mycoses * Active NTM lung infection or incomplete NTM treatment course * Bronchiectasis due to any of the following: CF, CVID, AAT or PCD * History of significant hemoptysis (requiring medical intervention and/or requiring blood transfusion) * Current tobacco smokers * Known or suspected immunosuppression, including history of invasive opportunistic infections (eg., histoplasmosis, listeriosis, coccidioidomycosis, pneumocystosis, aspergillosis), despite infection resolution, or otherwise recurrent infections of abnormal frequency, or prolonged infections suggesting an immune-compromised status, as judged by the Investigator * Participants with active autoimmune disease or participants using immunosuppressive therapy for autoimmune disease, including but not limited to connective tissue diseases (eg., systemic lupus erythematosus, scleroderma, polymyositis, dermatomyositis, mixed connective tissue disease), rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis, Hashimoto's thyroiditis, Graves' disease, primary biliary cirrhosis, and psoriasis vulgaris The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.

Treatments Being Tested

BIOLOGICAL

SAR445399

Pharmaceutical form: solution for injection Route of administration: injection

BIOLOGICAL

Placebo

Pharmaceutical form: solution for injection Route of administration: injection

Locations (3)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

Advanced Pulmonary Research Institute- Site Number : 8400001

Loxahatchee Groves, Florida, United States

Hull and Hull Medical Specialists- Site Number : 8400002

Plantation, Florida, United States

Clinical Research Associates of Central Pennsylvania- Site Number : 8400006

DuBois, Pennsylvania, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT07547436), the sponsor (Sanofi), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT07547436 clinical trial studying?

This is a randomized, double-blind, placebo-controlled study to measure the reduction in mucus plug score at 24 weeks of treatment with SAR445399 compared with placebo in adult participants aged 18 to 80 years with non-cystic fibrosis bronchiectasis (NCFB). The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT07547436?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT07547436?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT07547436. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT07547436. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-06-07 · Data from ClinicalTrials.gov.