Tiziana Life Sciences Ltd. announced that a reduction in activated microglia, as seen in six-month Positron Emission Tomography (PET) scans, has now been observed in a total of five of the six patients with non-active secondary-progressive multiple sclerosis (na-SPMS) treated with intranasal foralumab in its Expanded Access Program (EAP). Activated microglia are believed to play a prominent role in the pathogenesis of neuroinflammatory and neurodegenerative diseases including multiple sclerosis, Alzheimer?s disease, and amyotrophic lateral sclerosis, or ALS.