Preliminary trial of poly ICLC in chronic progressive multiple sclerosis.

Eighteen patients with chronic progressive multiple sclerosis (MS) were treated in an open preliminary trial of the interferon inducer and immune modulator, poly ICLC. All patients produced substantial interferon levels and experienced acute side effects, including fever and transient worsening of neurologic symptoms. Of nine patients with rapid neurologic deterioration at the time of entry into the study, only three had disease progression during treatment. We conclude that poly ICLC can be administered safely to MS patients, and that a controlled trial will be necessary to determine efficacy.