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A Phase I/II, randomized, placebo-controlled, multi-arm, dose-finding study to evaluate the safety, efficacy and immunogenicity of an Acne mRNA vaccine candidate in adults with moderate to severe acne 18 to 45 years of age

Status
Not yet recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-521740-38-00
Enrollment
70
Registered
2026-07-29
Start date
Unknown
Completion date
Unknown
Last updated
2026-07-29

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

Conditions

Acne

Brief summary

Core Study - Sentinel Cohorts A and B: Number of participants with unsolicited systemic AEs, Core Study - Sentinel Cohorts A and B: Number of participants with solicited injection site and systemic reactions, Core Study - Sentinel Cohorts A and B: Number of participants with unsolicited AEs, Core Study - Sentinel Cohorts A and B: Number of participants with MAAEs, Core Study - Sentinel Cohorts A and B: Number of patients with SAEs, Core Study - Sentinel Cohorts A and B: Number of participants with AESIs, Core Study - Sentinel Cohorts A and B: Number of participants with out-of-range biological test results (including shift from baseline values), Core Study - Main Cohort A: Percentage change from baseline (Day 1) in the number of inflammatory acne lesions on face, Core Study - Main Cohort A: Percentage change from baseline (Day 1) in the number of non-inflammatory acne lesions on face, Core Study – Main Cohort B: Percentage change from baseline (Day 1) in the total number of acne lesions on face at, Long-Term Extension – Sentinel Cohorts A, B and Main Cohort: Number of participants with SAEs and AESIs

Detailed description

Core Study - Sentinel Cohorts A, B and Main Cohorts A and B: Assessment of vaccine-antigen-specific serum antibody titers, Core Study - Main Cohort A and B: Absolute and percentage change from baseline (Day 1) in the total number of acne lesions on face, Core Study - Main Cohorts A and B: Absolute and percentage change from baseline (Day 1) in the number of inflammatory acne lesions on face, Core Study - Main Cohorts A and B: Absolute change from baseline (Day 1) in the number of non-inflammatory acne lesions on face, Core Study - Main Cohorts: Absolute change from baseline in IGA score, Core Study - Main Cohorts A and B: Number of participants with unsolicited systemic AEs, Core Study - Main Cohorts A and B: Number of participants with solicited injection site and systemic reactions, Core Study - Main Cohorts A and B: Number of participants with unsolicited AEs, Core Study - Main Cohorts A and B: Number of participants with MAAEs, Core Study - Main Cohorts A and B: Number of participants with SAEs, Core Study - Main Cohorts A and B: Number of participants with AESIs, Cores Study - Main Cohorts A and B: Number of participants with out-of-range biological test results (including shift from baseline values)

Interventions

DRUGDiluent : 0
DRUG9% sodium chloride solution

Sponsors

Sanofi Pasteur Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to 64 Years

Design outcomes

Primary

MeasureTime frame
Core Study - Sentinel Cohorts A and B: Number of participants with unsolicited systemic AEs, Core Study - Sentinel Cohorts A and B: Number of participants with solicited injection site and systemic reactions, Core Study - Sentinel Cohorts A and B: Number of participants with unsolicited AEs, Core Study - Sentinel Cohorts A and B: Number of participants with MAAEs, Core Study - Sentinel Cohorts A and B: Number of patients with SAEs, Core Study - Sentinel Cohorts A and B: Number of participants with AESIs, Core Study - Sentinel Cohorts A and B: Number of participants with out-of-range biological test results (including shift from baseline values), Core Study - Main Cohort A: Percentage change from baseline (Day 1) in the number of inflammatory acne lesions on face, Core Study - Main Cohort A: Percentage change from baseline (Day 1) in the number of non-inflammatory acne lesions on face, Core Study – Main Cohort B: Percentage change from baseline (Day 1) in the total number of acne lesion

Secondary

MeasureTime frame
Core Study - Sentinel Cohorts A, B and Main Cohorts A and B: Assessment of vaccine-antigen-specific serum antibody titers, Core Study - Main Cohort A and B: Absolute and percentage change from baseline (Day 1) in the total number of acne lesions on face, Core Study - Main Cohorts A and B: Absolute and percentage change from baseline (Day 1) in the number of inflammatory acne lesions on face, Core Study - Main Cohorts A and B: Absolute change from baseline (Day 1) in the number of non-inflammatory acne lesions on face, Core Study - Main Cohorts: Absolute change from baseline in IGA score, Core Study - Main Cohorts A and B: Number of participants with unsolicited systemic AEs, Core Study - Main Cohorts A and B: Number of participants with solicited injection site and systemic reactions, Core Study - Main Cohorts A and B: Number of participants with unsolicited AEs, Core Study - Main Cohorts A and B: Number of participants with MAAEs, Core Study - Main Cohorts A and B: Number of participa

Outcome results

None listed

Source: EU CTIS · Data processed: Jul 30, 2026