Major Inclusion Criteria:
- Male or female subjects age 18 - 80 years, inclusive; - Diagnosis of familial or sporadic ALS as defined by the El Escorial-Revised (2000) research diagnostic criteria for ALS [clinically definite, clinically probable, probable-laboratory-supported]; - ALS onset of ≤18 months from first clinical signs of weakness prior to screening; - If currently using riluzole, subject must be on a stable dose for at least 30 days prior to initiation of study drug; - If currently using edaravone, subject should have completed at least 14 days of their initial treatment cycle prior to initiation of study drug; - Last documented pulmonary function test result (i.e., slow vital capacity or forced vital capacity) must be greater than or equal to 70% predicted;; - Able to swallow study medication capsules; - No known allergies to the study drug or its excipients; - Received pneumococcal vaccine within 6 years prior to starting clinical trial.
Major Exclusion Criteria:
- ALSFRS-R score of ≤1 on more than one item in the assessment's individual components; - Currently diagnosed with a clinically significant psychiatric disorder or dementia that would preclude evaluation of symptoms; - Currently use or treated with parenteral (intramuscular or intravenous) high dose (>25 mg/week) Vitamin B12 within 30 days prior to study drug administration; - Poor peripheral venous access that will limit the ability to draw blood as judged by the Investigator; - Currently participating, or has participated in a study with an investigational or marketed compound or device within 30 days or 5 half-lives, whichever is shorter, prior to signing the informed consent; - Use of tracheostomy or >22/24-hour ventilatory support.

This is a Phase 2b/3 multicenter, randomized, double-blind, placebo-controlled, parallel group study to evaluate the efficacy, safety and tolerability of MN-166 followed by an open-label extension phase compared to matching placebo in subjects diagnosed with ALS. The study will consist of a screening phase (up to 30 days) followed by a double-blind phase (12 months). Following the screening phase, subjects who continue to meet entry criteria will be randomly assigned to one of two treatment groups: MN-166 or matching placebo in a 1:1 ratio. Upon completion of the double-blind phase, subjects will be given the option to continue to the Open-label Extension Phase for a period of six months.

• MediciNova

NCT04057898 (First Published: 8/6/2019)