ALTO-300 in Depression

Phase 2

Completed

• Conditions: Major Depressive Disorder
• Interventions: Drug: ALTO-300 oral (PO) tablet

• Registration Number: NCT05118750
• Lead Sponsor: Alto Neuroscience

Brief Summary

The purpose of this study is to collect biologically-based data for defining predictors and correlates of the effects of ALTO-300.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2021-10-18
• Study First Submitted QC: 2021-11-02
• Study First Posted: 2021-11-12
• Study Start: 2021-12-13
• Primary Completion: 2023-05-05
• Study Completion: 2023-05-09
• Disposition First Posted: 2023-05-22
• Status Verified: 2024-04
• Disposition First Submitted: 2024-04-24
• Last Update Submitted: 2024-04-25
• Last Update Posted: 2024-04-30

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 91

Inclusion Criteria

• have a diagnosis of MDD based on the Structured Clinical Interview for DSM-5 (SCID) for depression
• have moderate to severe depression on DSM-5 depression criteria items, as assessed by a score of ≥10 on the Patient Health Questionnaire-9 (PHQ-9) at each of Visits 1, 2, and 3
• at baseline (Visit 2) are taking a stable dose of a single SSRI, serotonin-norepinephrine reuptake inhibitor (SNRI), or bupropion and have been on that medication for ≥6 weeks at an adequate dosage defined by the Antidepressant Treatment Response Questionnaire (ATRQ), and with no modification to dosage for ≥2 weeks.
• have either: had a continuous period of euthymia of at least 2 months in the past 26 months, regardless of the number of failed antidepressants OR not had a period of euthymia of at least 2 months in the past 26 months but within the past 24 months have not failed >3 antidepressants at an adequate dosage and duration as defined by the ATRQ
• are currently on their last failed currently prescribed permitted baseline antidepressant medication
• have a response to their currently prescribed antidepressant noted as depression that has improved ≤49% as defined by the ATRQ.
• agree to, and are eligible for all biomarker assessments (EEG, neurocognitive testing, activity and sleep monitoring, genetic testing). To participate in the activity and sleep monitoring biomarkers, all participants will be required to have a smart phone or an internet enabled tablet. A participant who otherwise qualifies may refuse the salivary genetic sample and be included in the study.
• fluent in English
• willing to comply with all study procedures (with the notes above), able to complete all assessments independently, and available for the duration of the study.

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Exclusion Criteria

Any of the following medical conditions:

• hepatic impairment (i.e., cirrhosis or active/chronic liver disease)
• baseline serum transaminase levels that exceed 2x upper limit of normal(ULN)
• severe impediment to vision, hearing, comprehension, and/or hand movement that interferes with study tasks.
• any contraindications to EEG (i.e., requiring high concentration oxygen)
• active suicidal ideation as assessed by the investigator.
• moderate to severe Alcohol Use Disorder (AUD)

Concurrent use of any of the following at baseline (Visit 2):

• tricyclic antidepressants (TCAs), mirtazapine, or monoamine oxidase inhibitors (MAOIs)
• melatonin, ramelteon, or other melatonin agonist
• a potent CYP1A2 inhibitor (e.g., fluvoxamine and ciprofloxacin)
• antipsychotics or mood stabilizers
• hypnotics, anxiolytics, stimulants, or opiate pain medications greater than three days per week and unable to reduce use to 3 or fewer days per week on an as needed basis

Have received electroconvulsive therapy (ECT), deep brain stimulation (DBS),vagus nerve stimulation (VNS), >2 treatments with ketamine, or esketamine in thecurrent depressive episode.

Diagnosis of bipolar disorder or a psychotic disorder based on the SCID forDSM-5

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
ALTO-300	ALTO-300 oral (PO) tablet	ALTO-300 oral (PO) tablet; daily dosing 8 weeks

Primary Outcome Measures

Name	Time	Method
To understand the relationship between baseline biology and clinical outcome to ALTO-300 using the Montgomery-Åsberg Depression Rating Scale (MADRS)	Measured 6 times over 8 weeks	The Montgomery-Åsberg Depression Rating Scale (MADRS) measures the severity of depression where smaller scores indicate less depression and higher scores suggest more severe depression. Possible scores for this 10 item version range from 0 to 60. The change from baseline to the end of the study is the primary outcome.
To understand the relationship between baseline biology and clinical outcome to ALTO-300 using the Clinical Global Impression scale - Severity (CGI-S)	Measured 6 times over 8 weeks	The Clinical Global Impression scale - Severity (CGI-S) measures the severity of psychopathology in general where smaller scores indicate less illness and higher scores suggest more severe illness. Possible scores for this scale range from 1 to 7. The change from baseline to the end of the study is the primary outcome.
To evaluate the safety of ALTO-300	From the signing of the ICF until the end-of-treatment visit (up to 11 weeks)	Assessment of vital signs and laboratory data, withparticular attention to liver function tests

Trial Locations

Locations (11)

Site 102; 🇺🇸 Dallas, Texas, United States

Site 103; 🇺🇸 Sacramento, California, United States

Site 165; 🇺🇸 DeSoto, Texas, United States

Site 158; 🇺🇸 Santee, California, United States

Site 166; 🇺🇸 Saint Charles, Missouri, United States

Site 137; 🇺🇸 Noblesville, Indiana, United States

Site 132; 🇺🇸 New York, New York, United States

Site 147; 🇺🇸 Fort Worth, Texas, United States

Site 153; 🇺🇸 Culver City, California, United States

Site 159; 🇺🇸 Clermont, Florida, United States

Site 161; 🇺🇸 Okeechobee, Florida, United States