Safety and Pharmacokinetics Study of MT-3921 in Spinal Cord Injury

Inclusion Criteria: Additional screening criteria check may apply for qualification: * Provide written informed consent prior to beginning any study procedures * Cervical spinal cord injury, ASIA impairment scale grade A, B, and C with the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) Neurological level of injury between C4 and C8 * Male or female subjects aged between 18 and 65 years * Body mass index (BMI) \<35 * Has had stabilization surgery (if needed) following their SCI and prior to receiving MT-3921 Exclusion Criteria: Additional screening criteria check may apply for qualification: * Any concomitant injury that interferes with the performance, interpretation or validity of neurological examinations * Poly-traumatic Injury as defined by Injury Severity Score (ISS) values \> 25 * Penetrating spinal cord injuries * Traumatic transection of the spinal cord or spinal cord contusion size \> 3 cm determined by MRI * Any other significant pre-existing medical conditions prior to spinal cord injury or current conditions that, in the judgement of the iInvestigator, may increase the risks associated with study participation * Subjects with HIV, HBV or HCV positive * Psychoactive substance use disorder * History or presence of malignancy within the last 5 years prior to screening * Pregnant or nursing women * Subjects with hereditary fructose intolerance * History of anaphylaxis or significant allergy