This clinical trial is focused on studying the effects of a medication called masitinib in treating a condition known as Multiple Sclerosis (MS). Specifically, the study is looking at two types of MS: primary progressive and secondary progressive, both of which do not involve relapses. Masitinib is a type of drug known as a tyrosine kinase inhibitor, which is taken orally in the form of a coated tablet. The study will compare the effects of masitinib to a placebo, which is a substance with no active medication, to see how effective and safe masitinib is for patients with these types of MS.
The purpose of the study is to evaluate how well masitinib works and how safe it is for patients with primary progressive or secondary progressive MS without relapses. Participants in the study will take masitinib at a dose that can be increased up to 4.5 milligrams per kilogram of body weight per day. The study will last for 96 weeks, during which time participants will be monitored for any changes in their condition. This includes looking at how their disability progresses, using a scale called the Expanded Disability Status Scale (EDSS), and assessing their overall quality of life.
Throughout the study, various assessments will be conducted, such as timed walking tests, hand dexterity tests, and brain scans using MRI to check for changes in brain volume and lesions. Additionally, the study will measure levels of certain proteins in the blood that may indicate changes in the disease. The goal is to gather comprehensive data on how masitinib affects the progression of MS and the overall well-being of the participants.



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