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A seamless Phase I/II trial with an initial open-label dose escalation part and a subsequent randomised, double-blind, placebo-controlled expansion part to evaluate the safety, tolerability, and efficacy of a single dose of BI 3720931, an inhaled lentiviral vector gene therapy, in adult people with cystic fibrosis who are ineligible for CFTR modulators (LenticlairTM 1)

Status
Suspended
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-503281-23-00
Acronym
1504-0001
Enrollment
12
Registered
2024-06-17
Start date
2024-12-19
Completion date
Unknown
Last updated
2025-07-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cystic fibrosis

Brief summary

Phase I: Occurrence of any drug-related, treatment-emergent AE up to Week 24 after drug administration, Phase II: Absolute change from baseline in FEV1pp at Week 8 after drug administration

Detailed description

Phase I: Occurrence of treatment response defined as change from baseline ≥5% in FEV1pp, comparing the mean of 3 pre-treatment FEV1pp measured in the screening period with the mean of 3 post treatment FEV1pp values at Weeks 4, 6, and 8, Phase I: Absolute change from baseline in FEV1pp at Week 24 after drug administration, Phase I: Occurrence of any DLTs up to Week 24 after drug administration, Phase II: Absolute change from baseline in FEV1pp at Week 24 after drug administration, Phase II: Occurrence of any SAEs up to Week 24 after drug administration, Phase II: Occurrence of any drug-related, treatment-emergent AEs up to Week 24 after drug administration

Interventions

DRUGSolvent for dilution for BI 3720931 inhaler solution

Sponsors

Boehringer Ingelheim International GmbH, Boehringer Ingelheim Espana S.A.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Phase I: Occurrence of any drug-related, treatment-emergent AE up to Week 24 after drug administration, Phase II: Absolute change from baseline in FEV1pp at Week 8 after drug administration

Secondary

MeasureTime frame
Phase I: Occurrence of treatment response defined as change from baseline ≥5% in FEV1pp, comparing the mean of 3 pre-treatment FEV1pp measured in the screening period with the mean of 3 post treatment FEV1pp values at Weeks 4, 6, and 8, Phase I: Absolute change from baseline in FEV1pp at Week 24 after drug administration, Phase I: Occurrence of any DLTs up to Week 24 after drug administration, Phase II: Absolute change from baseline in FEV1pp at Week 24 after drug administration, Phase II: Occurrence of any SAEs up to Week 24 after drug administration, Phase II: Occurrence of any drug-related, treatment-emergent AEs up to Week 24 after drug administration

Countries

France, Italy, Netherlands, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026