This is a Phase 1/2a double-blind dose-escalating study to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of single and multiple doses of ARO-ALK7 in adult participants with obesity without Type 2 Diabetes Mellitus (T2DM) (Part 1), and the safety, tolerability, and PD of multiple doses of ARO-ALK7 in adult participants with obesity with and without T2DM, either as monotherapy or in combination with tirzepatide (Part 2).
Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.
Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.
Currently recruiting: the trial is enrolling patients. A data readout is not expected until after enrollment closes and the follow-up period is complete.
Arrowhead Pharmaceuticals (ARWR) is the sponsoring company for this trial. BiotechSign currently grades this company C (53/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.