This is an open-label, biomarkers-driven study.~Patients with rapidly progressive ALS will be assigned to the following dose regimen of IC14:~• 4 mg/kg intravenously on Day 1, followed by 2 mg/kg daily x 3 days on Days 2-4. This 4-day course will be repeated on Days 8-11.~Patients will be followed for 28 days after the last dose of study drug. Patients will all undergo [11C]-PBR28-MR-PET scans at two time points: before treatment onset and after the last treatment cycle.~Patients will be followed for 28 days after the last dose of study drug for safety.
Patients with rapidly progressive ALS will be assigned to IC14 intravenously on Day 1-4. This 4-day course will be repeated on Days 8-11. Patients will all undergo MR-PET scans at two time points: before treatment onset and after the last treatment cycle. This scan will measure areas of ALS disease activity and assess response to IC14 treatment. MR-PET scans will be compared to historical controls.