A Randomized, Double-Blind, Placebo-Controlled Study of ALTO-300 With an Open-Label Extension in Adults With Major Depressive Disorder
Trial Snapshot
- Phase
- Phase 2
- Status
- Recruiting
- Sponsor
- Alto Neuroscience
- Enrollment
- 321
- Locations
- 45
- Primary Endpoint
- To assess efficacy of adjunctive ALTO-300 versus placebo on symptoms of MDD in a pre-defined subgroup of participants as measured by the change over time up to week 6 in the Montgomery-Åsberg Depression Rating Scale (MADRS).
Study Overview
Brief Summary
The purpose of this study is to determine efficacy differences between ALTO-300 and placebo, used adjunctively to an antidepressant, related to patient characteristics.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Eligibility Criteria
- Ages
- 18 Years to 70 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Have a diagnosis of moderate to severe major depressive disorder (MDD)
- •At Visit 1, currently taking a single SSRI, SNRI, or bupropion for at least 6 weeks with no dose modifications in the past 2 weeks by Visit 2
- •Willing to comply with all study assessments and procedures
- •Must not be pregnant or breastfeeding at time of enrollment or throughout study
Exclusion Criteria
- •Evidence of unstable medical condition
- •Nightly use of sleep medication
- •Diagnosed bipolar disorder, psychotic disorder, or dementia
- •Current moderate or severe substance use disorder
- •Has a history of hypersensitivity or allergic reaction to ALTO-300 or any of its components/excipients
- •Concurrent or recent participation in another clinical trial for mental illness involving an investigational product or device
Arms & Interventions
ALTO-300
Participants will receive ALTO-300 capsule once daily in the evening, from Day 1 to Day 42 in double blind (DB) treatment period. Eligible participants who will enter the open-label (OL) treatment period will receive ALTO-300 capsule once daily in the evening from OL baseline until the end of OL period/early termination visit (Up to 8 weeks).
Intervention: ALTO-300 (Drug)
Placebo
Participants will receive matching placebo capsule once daily in the evening, from Day 1 to Day 42 in double blind (DB) treatment period.
Intervention: Placebo (Drug)
Outcomes
Primary Outcomes
To assess efficacy of adjunctive ALTO-300 versus placebo on symptoms of MDD in a pre-defined subgroup of participants as measured by the change over time up to week 6 in the Montgomery-Åsberg Depression Rating Scale (MADRS).
Time Frame: Change over time for up to week 6
MADRS is a clinician-administered scale designed to measure depression severity and detects changes due to antidepressant treatment. The MADRS evaluates the following 10 items: apparent sadness, reported sadness, inner tension, reduced sleep, reduced appetite, concentration difficulties, lassitude, inability to feel, pessimistic thoughts, and suicidal thoughts. Each item is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total possible score of 60. Higher scores represent a more severe condition.
Secondary Outcomes
- To assess efficacy of adjunctive ALTO-300 versus placebo on symptoms of MDD in all randomized participants as measured by the change over time up to week 6 in the Montgomery-Åsberg Depression Rating Scale (MADRS)(Change over time for up to week 6)
- To assess efficacy of adjunctive ALTO-300 versus placebo for MDD as measured by the change over time up to week 6 in response (>50% improvement from baseline) rates based on the MADRS(Change over time for up to week 6)
- To evaluate the safety of ALTO-300 during both the OL and DB periods of the study as measured by the assessment of the incidence, severity, and relatedness of Adverse Events.(Assessed from Day 1 to Week 14)
- To evaluate the safety of ALTO-300 during both the OL and DB periods of the study as measured by the assessment of Heart Rate.(Assessed from Day 1 to Week 14)
- To evaluate the safety of ALTO-300 during both the OL and DB periods of the study as measured by the assessment of Weight.(Assessed from Day 1 to Week 14)
- To evaluate the safety of ALTO-300 during both the OL and DB periods of the study as measured by the assessment of Blood Pressure.(Assessed from Day 1 to Week 14)
- To evaluate the safety of ALTO-300 during both the OL and DB periods of the study as measured by the assessment of suicidality with the Concise Health Risk Tracking Self-Report,12 item scale (CHRT-SR12).(Assessed from Day 1 to Week 15)