Effects of CT-388, a once-weekly signaling-biased dual GLP-1/GIP receptor agonist, on weight loss and glycemic control in preclinical models and participants with obesity

Nov 30, 2025Molecular metabolism

Weight loss and blood sugar control with once-weekly CT-388, a drug targeting two hormone receptors, in obesity studies and patients

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Abstract

The mean percent change in bodyweight from baseline to day 29 was -4.7% to -8.0% across CT-388 doses compared to -0.5% with placebo.

  • Biased activation of GLP-1R and GIPR by CT-388 resulted in minimal receptor internalization compared to native ligands.
  • CT-388 improved glycemic control and reduced body weight in preclinical models, showing effects on appetite and metabolic dysfunction.
  • In a phase 1 clinical trial, CT-388 was generally well tolerated, with most treatment-emergent adverse events being mild or moderate.
  • Glycemic parameters improved during fasting and an oral glucose tolerance test after CT-388 treatment.
  • Pharmacokinetic data indicated that CT-388 supports once-weekly dosing.

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