Aims:To assess the glycaemic efficacy and safety of CT‐868, a cAMP signal‐biased, dual glucagon‐like peptide‐1/glucose‐dependent insulinotropic polypeptide receptor agonist, in participants with type 2 diabetes (T2D).
Materials and Methods:
This 26‐week (W), phase 2, randomized, double‐blind placebo‐controlled trial enrolled adults with T2D, Body Mass Index ≥27 kg/m
2
, and glycated haemoglobin (HbA1c) 7.0–10.0%. Participants were randomized (1:2:1) to once‐daily CT‐868 1.75 mg, 4.0 mg, or placebo. Due to COVID‐19‐related CT‐868 supply constraints, some participants randomized to 4.0 mg received 3.25 mg maximum and were analysed as a separate dose arm. The primary endpoint was change from baseline in HbA1c at W26. Secondary endpoints included changes from baseline to W26 in fasting glucose, 7‐point self‐monitored blood glucose (SMBG), body weight, lipids and the occurrence of adverse events (AEs).
Results:
Overall, 103 participants were enrolled (CT‐868 1.75 mg,
n
= 26; 3.25 mg,
n
= 18; 4.0 mg,
n
= 32; placebo,
n
= 27). Clinically meaningful and statistically significant improvements in HbA1c were observed with CT‐868 at W26 (−1.61 to −2.24%‐points vs. placebo; all
p
< 0.001). Body weight was modestly reduced with CT‐868 4.0 mg at W26 (−2.9% vs. placebo,
p
< 0.001). CT‐868 improved fasting glucose, SMBG, and most lipid parameters vs. placebo. AEs were mostly mild/moderate. No participants experienced hypoglycaemia.
Conclusions:CT‐868 1.75 to 4.0 mg yielded robust, clinically meaningful decreases in HbA1c, supporting potent glycaemic‐lowering effects and improved key lipid parameters in participants with overweight/obesity and T2D, despite modest weight loss. CT‐868 was well tolerated, supporting future investigation of higher doses to maximize weight loss.