The present invention includes a composition comprising an A2A agonist. The present invention also includes a method of treating or reducing the symptoms of a neuroinflammatory disease in a patient in need thereof, wherein the method comprises administering to the patient a therapeutically effective amount of an A2A agonist. In one embodiment, the A2A agonist is administered intrathecally to the patient. In another embodiment, the A2A agonist comprises ATL313.