For me, the interesting part of the article is the update on the clinical trials. This seems like the best hope for a treatment for PPMS in the short-medium term.
"Dr. Stuve's study involves patients with primary progressive disease. Enrollment just finished, comprising 435 patients at 60 sites in the United States and Canada . Another study involving patients with relapsing-remitting disease is enrolling patients and is being by led by researchers at the University of California in San Francisco."