A Biomarker-Guided, Randomized, Placebo-Controlled Efficacy and Safety Study of Liafensine in Patients With TRD

This study is a randomized, double blind, placebo-controlled Phase 2b study to assess the efficacy, safety, tolerability, and pharmacokinetics of liafensine. Eligible patients were randomized 1:1:1 to receive liafensine 1 mg QD, liafensine 2 mg QD, or placebo QD. The main objectives of this study are as follows:

Primary Efficacy Objective: To demonstrate that liafensine was superior to placebo in DGM4 positive patients with TRD as assessed by the change in MADRS total score from baseline to Day 42 of double blind treatment

Key Secondary Efficacy Objective: To evaluate the change from baseline to Day 42 in DGM4 positive patients with TRD treated with liafensine vs placebo on the Clinical Global Impression-Severity Scale (CGI S)

Other Secondary Efficacy Objective: To evaluate the Clinical Global Impression-Improvement Scale (CGI I) at Day 42 in DGM4 positive patients with TRD treated with liafensine vs placebo

Safety Objective: To compare the safety and tolerability of liafensine vs placebo in all randomized patients with TRD who received at least one dose of study drug during double blind treatment

Psychiatric assessments were performed by a psychiatrist or trained and certified clinical staff member. Neurologic assessments were performed by an experienced clinician. Patients who fulfilled Hy's Law, defined as ALT or AST ≥ 3 × ULN and TBL ≥ 2 × ULN, in the absence of significant increase in ALP and in the absence of an alternative diagnosis that explained the increase in total bilirubin, were discontinued, with medical follow up as appropriate.