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MRT5005

Phase 1

Cystic Fibrosis | Small molecule | Respiratory |Sanofi|Last Updated: Feb 9, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment42
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03375047Study to Evaluate the Safety & Tolerability of MRT5005 Administered by Nebulization in Adults With Cystic FibrosisPHASE1 COMPLETED 42May 10, 2018Mar 15, 2022Feb 9, 202616 United States
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Study Endpoints
Primary Endpoints
Parts A, B and D: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events
From the first dose of study treatment administration (Day 1) up to 48 weeks (end of the follow-up period) after the last dose of study treatment administration (Part A: Day 337, Part B: Day 365 and Part D: Day 341)

An adverse event (AE) was any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product and that did not necessarily had a causal relationship with the study treatment. A serious adverse event (SAE) was any untoward medical occurrence (whether considered to be related to study treatment or not) that at any dose: resulted in death; or was life-threatening; or required inpatient hospitalization or prolongation of existing hospitalization; or resulted in persistent or significant disability/incapacity; or was a congenital abnormality/birth defect; or was an important medical event. The TEAEs were defined as events that were newly reported or reported to worsen in severity after the start of study treatment up to 48 weeks (end of follow-up period) after the last dose of study treatment administration.

Secondary Endpoints
Parts A, B and D: Absolute Change From Baseline in Percent Predicted Forced Expiratory Volume in 1 Second (ppFEV1)
Part A:BL, D1(8hPD), D2(24hPD), D3, D8, D15 and D29; Part B:BL, D1(6hPD), D2, D8(PrD and 6hPD), D9, D15(PrD and 6hPD), D16, D22(PrD and 6hPD), D23, D29(PrD and 6hPD), D30, D36, D43 and D57; Part D:BL, D1(2hPD), PrD on D2, D3, D4 and D5, D11, D18 and D32
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part A - SAD Group 1: MRT5005 8 mgEXPERIMENTALParticipants received single dose of MRT5005 8 milligrams (mg) by nebulization on Day 1.
Part A - SAD Group 2: MRT5005 16 mgEXPERIMENTALParticipants received single dose of MRT5005 16 mg by nebulization on Day 1.
Part A - SAD Group 3: MRT5005 20 mgEXPERIMENTALParticipants received single dose of MRT5005 20 mg by nebulization on Day 1.
Part A - SAD Group 4: MRT5005 24 mgEXPERIMENTALParticipants received single dose of MRT5005 24 mg by nebulization on Day 1.
Part A - SAD Groups: Pooled PlaceboPLACEBO_COMPARATORParticipants received single dose of placebo (normal saline) by nebulization on Day 1. Data were analyzed as a pooled population for all participants who received placebo in Part A SAD groups and reported in this arm.
Part B - MAD Group 1: MRT5005 8 mgEXPERIMENTALParticipants received MRT5005 8 mg once weekly by nebulization for 5 weeks (i.e., on Day 1, Day 8, Day 15, Day 22 and Day 29).
Part B - MAD Group 2: MRT5005 12 mgEXPERIMENTALParticipants received MRT5005 12 mg once weekly by nebulization for 5 weeks (i.e., on Day 1, Day 8, Day 15, Day 22 and Day 29).
Part B - MAD Group 3: MRT5005 16 mgEXPERIMENTALParticipants received MRT5005 16 mg once weekly by nebulization for 5 weeks (i.e., on Day 1, Day 8, Day 15, Day 22 and Day 29).
Part B - MAD Group 4: MRT5005 20 mgEXPERIMENTALParticipants received MRT5005 20 mg once weekly by nebulization for 5 weeks (i.e., on Day 1, Day 8, Day 15, Day 22 and Day 29).
Part B - MAD Groups: Pooled PlaceboPLACEBO_COMPARATORParticipants received placebo (normal saline) once weekly by nebulization for 5 weeks (i.e., on Day 1, Day 8, Day 15, Day 22 and Day 29). Data were analyzed as a pooled population for all participants who received placebo in Part B MAD groups and reported in this arm.
Part D: MRT5005 4 mgEXPERIMENTALParticipants received MRT5005 4 mg once daily by nebulization from Day 1 to Day 5.
Part D: PlaceboPLACEBO_COMPARATORParticipants received placebo (normal saline) once daily by nebulization from Day 1 to Day 5.
Interventions
NameTypeDescription
MRT5005DRUGNebulization of MRT5005
Normal salineDRUGNormal Saline for Inhalation
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites16

Inclusion Criteria: * Confirmed diagnosis of CF as defined by both of the following: * Two CF disease-causing cystic fibrosis transmembrane conductance regulator (CFTR) mutations in Class I or II (genotype confirmed at the screening visit). * Chronic sinopulmonary disease and/or gastrointestin...

Countries:United States
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