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ADDITIONAL DATA FROM THE PHASE 2/3 GAIN TRIAL OF COR388 (ATUZAGINSTAT) FOR THE TREATMENT OF MILD-MODERATE ALZHEIMER’S DISEASE
Abstract
Aims
Additional analysis of data from the GAIN trial, a large Phase 2/3 randomized, double-blind, placebo-controlled clinical trial in mild-moderate AD testing the efficacy and safety of the oral small-molecule atuzaginstat, a novel P. gingivalis virulence factor inhibitor.
Methods
The Phase 2/3 GAIN trial (NCT03823404) completed enrollment in November 2020. 643 subjects (aged 55-80; mild-moderate AD with MMSE 12-24) were randomized 1:1:1 to one of two doses of atuzaginstat (40mg or 80mg BID) or placebo for 48 weeks.
Results
Baseline data show that the 643 randomized subjects are typical of a mild-moderate AD population: 57% female, 64% ApoE4 carriers, 50% mild (MMSE = 19-24) and 50% moderate (MMSE 12-18). 70% were from the United States and 30% from Europe. 74% of subjects received symptomatic AD co-medications. Topline data indicated efficacy of both doses of atuzaginstat in prespecified P. gingivalis infected populations. Changes in P. gingivalis DNA in saliva correlated significantly with outcomes on multiples scales, including ADAS-Cog, CDR-SB, and MMSE. New analyses will be shared.
Conclusions
Enrollment of the GAIN trial was completed in November 2020, and topline data announced in October 2021. The GAIN trial provided further support that P. gingivalis is a novel driver of disease in an easily identified population comprising approximately 50% of the mild to moderate patients. Atuzaginstat slowed cognitive decline in Alzheimer’s disease with P. gingivalis by approximately 50% on ADAS-cog. Additional analyses are pending and will be shared.