Ehst BD, Strober B, Blauvelt A, Maslin D, Macaro D, Carpenter N, Bodmer M, McHale D. A randomized, double-blinded, phase 2 trial of EDP1815, an oral immunomodulatory preparation of
Prevotella histicola, in adults with mild-to-moderate plaque psoriasis.
Front Med (Lausanne) 2024;
11:1292406. [PMID:
38813388 PMCID:
PMC11133679 DOI:
10.3389/fmed.2024.1292406]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 04/02/2024] [Indexed: 05/31/2024] Open
Abstract
Background
Psoriasis is a chronic inflammatory skin disease. EDP1815 is an oral, gut-restricted preparation of non-live Prevotella histicola, the first of a new immunomodulatory therapeutic class targeting the small intestine to generate systemic anti-inflammatory responses.
Objective
To evaluate safety and efficacy of EDP1815 in mild-to-moderate psoriasis in a proof-of-concept study.
Methods
A phase 2, multicenter, randomized, double-blinded, placebo-controlled, parallel-group study with a 16-week treatment period and up to 24 weeks of follow-up. Participants were randomized to receive 1, 4, or 10 capsules daily.
Results
EDP1815 was well tolerated with comparable rates of treatment-emergent adverse events to placebo, and no drug-related serious adverse events. Clinically meaningful responses to EDP1815, defined as at least 50% reduction in Psoriasis Area and Severity Index (PASI-50) at week 16, were observed in all 3 cohorts, statistically significant in the 1-capsule (29.7%; P = 0.048) and 4-capsule (31.9%; P = 0.022) groups, compared with placebo (12.1%). Among EDP1815-treated PASI-50 responders at week 16, 60% (18/30) maintained or improved off-treatment responses at week 40.
Limitations
Continued off-treatment improvement past 16 weeks shows potential for greater therapeutic benefit that was not assessed.
Conclusion
EDP1815 was well-tolerated with a placebo-like safety profile, and had meaningful efficacy outcomes in psoriasis, validating this novel immunomodulatory approach.
Clinical trial registration
https://www.clinicaltrials.gov/search?term=NCT04603027, identifier NCT04603027.
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