Sanofi said on Friday that its multiple sclerosis drug candidate was shown to delay worsening of a progressive form of the disease by 31%, as the French drugmaker eyes a request for approval later this year.

Sanofi’s experimental drug for a form of multiple sclerosis delayed the progression of disability by nearly a third, providing hope for patients for whom there’s currently no treatment.

After missing primary endpoints in relapsing forms of MS, tolebrutinib has proved its efficacy in secondary progressive MS patients.