NeuroBo Pharmaceuticals has revealed positive top-line safety, tolerability and dose-linear pharmacokinetics (PK) data from the single ascending dose (SAD) Part 1 of its Phase 1 clinical trial of DA-1726, a novel, dual oxyntomodulin (OXM) analog agonist that functions as a glucagon-like peptide-1 receptor (GLP1R) and glucagon receptor (GCGR), for the treatment of obesity.
In the SAD Part 1 of the Phase 1 clinical trial, a total of 45 people with obesity and otherwise healthy participants were randomised in a double-blind, 6:3 ratio of DA-1726 or placebo. Single ascending doses were found to be safe and well tolerated, with no serious adverse events. Only five subjects in the DA-1726 treatment group reported adverse events (AEs), compared with three subjects in the placebo group. A dose-linear PK profile was observed across the investigated dose range. Additional cohorts are being added to the SAD Part 1 to explore the maximum tolerated dose.
The MAD Part 2 of the Phase 1 trial is a randomized, placebo-controlled, double-blind study to investigate the safety, tolerability, PK, and PD of multiple ascending doses of DA-1726 in obese, otherwise healthy subjects. Part 2 is expected to enrol approximately 36 participants, who will be randomized at the same 6:3 ratio into 4 planned cohorts, each to receive 4 weekly administrations of DA-1726 or placebo. The first patient in the MAD study was dosed ahead of schedule, in late June, as previously reported.
The primary endpoint of the Phase 1 trial is to assess the safety and tolerability of DA-1726 by monitoring adverse events (AEs), serious adverse events (SAEs), treatment emergent adverse events (TEAEs) and AEs leading to treatment discontinuation. Secondary endpoints include the PK of DA-1726, assessed via serum concentrations over time and metabolite profiling at the highest doses of DA-1726. Exploratory endpoints will include the effect of DA-1726 on metabolic parameters, cardiac parameters, fasting lipid levels, body weight, waist circumference and body mass index (BMI), among others.
"The safety, tolerability and dose-linear PK data generated from the Part 1 SAD trial are highly encouraging and allowed for the accelerated initiation of our multiple ascending dose (MAD) study," stated Hyung Heon Kim, President and Chief Executive Officer of NeuroBo. "In light of the strong safety profile from the SAD Part 1 of the study, we are in the process of adding one or more cohorts to further explore the maximum tolerated dose, which will allow us to realize the full potential of DA-1726. Based on the preclinical data generated to date, as well as DA-1726's balanced activation of GLP1R and glucagon receptors, which increases energy expenditure, we continue to believe that DA-1726 may become a best-in-class obesity drug with a better tolerability profile than currently marketed GLP-1 agonists, and those now in late-stage clinical trials. We eagerly anticipate reporting top-line data from the MAD Part 2 in the first quarter of 2025, which will give us an early read on clinical efficacy. Additionally, we continue to plan Part 3 of the trial that will explore early proof of concept."