Immune Profiles in Multiple Sclerosis (MS) Patients and Healthy Volunteers Through Thoracic Duct Cannulation

Exclusion Criteria

• •1\. Participants suspected of not being able or willing to cooperate or comply with study protocol requirements in the opinion of the investigator.
• •2\. Participants with primary progressive MS (Polman C et al., 2011) 3. Participants meeting criteria for neuromyelitis optica (Wingerchuck D et al., 2015) 4. Participants with disease duration of more than 10 years 5. Participants who are pregnant or nursing (lactating) 6. Participants with active chronic disease (or stable but treated with immune therapy) of the immune system other than MS (e.g. rheumatoid arthritis, scleroderma, Sjögren's syndrome, Crohn's disease, ulcerative colitis, etc.) or with immunodeficiency syndrome (hereditary immune deficiency, drug-induced immune deficiency) 7. Participants with active systemic bacterial, viral or fungal infections, or known to have acquired immunodeficiency syndrome (AIDS) 8. Participants with neurological symptoms consistent with PML or confirmed PML 9. Participants at risk of developing or having reactivation of syphilis or tuberculosis 10. History of cardiovascular disease or uncontrolled hypertension 11. History of diabetes mellitus 12. History of cancer (other than localized skin cancer) in the previous 5 years 13. Have received any live or live-attenuated vaccines (including for varicella-zoster virus or measles) within 2 months prior to first study drug administration 14. Immunization with non-live vaccines within 2 weeks of the study procedure 15. Participants at risk of developing or having reactivation of hepatitis: Positive results at Screening for serological markers for hepatitis (H) B and C indicating acute or chronic infection:
• •1. HBs Ag and/or anti-HBc IgM and/or HB virus deoxyribonucleic acid (DNA)
• •2. anti-HBs negative and Anti-HBc positive
• •3. anti-HC IgG (if positive IgG, HCV-RNA PCR will be performed and if negative, participant can be enrolled) 16. Use of other investigational drugs at the time of enrollment (Screening) or within the prior 30 days, or five elimination half-lives, or until the expected pharmacodynamic effect has returned to baseline, whichever is longer 17. Absolute neutrophil count (ANC) \<750/mm3; 18. Hemoglobin \<10.0 g/dL 19. Platelet count \<100,000/mm3 20. Prothrombin time (PT) or international normalized ration (INR) \>1.5 x ULN