Safety and Feasibility of Umbilical Cord Blood Cell Transplant Into Injured Spinal Cord

Inclusion Criteria: * Subjects of either gender and 18-60 years old * Subjects with chronic spinal cord injury (defined as ≧12 months post-initial SCI surgery) with stable neurological findings for at least 6 months * Subject with a current neurological status of ASIA A * The neurological level of the subjects is between C5 and T11 * The MRI shows that the injured site of the spinal cord is within three vertebral levels and there is no cyst * Subjects must be able to read, understand, and complete the Visual Analog Scale * Subjects who have voluntarily signed and dated an informed consent form, approved by the appropriate IRB, prior to any study-specific procedures Exclusion Criteria: * Significant renal, cardiovascular, hepatic and psychiatric diseases * Significant medical diseases or infection (including but not limited to the carrier of hepatitis B virus or HIV) * Pregnant or lactating woman * Female of childbearing potential and who is unwilling to use an effective contraceptive method while enrolled in the study * The MRI shows that the length of spinal cord lesion exceeds three segments or there is cyst in the spinal cord * The lesion edge of the spinal cord cannot be determined by imaging technology * Unavailability of HLA matched umbilical cord blood cells * Any contraindication of laminectomy operation, MPSS and/or lithium carbonate * Subject who is currently participating in another investigational study or has been taking any investigational drug within the last 4 weeks prior to screening of this study and finally * Any criteria, which, in the opinion of the investigator, suggests that the subject would not be compliant with the study protocol and/or would not be suitable to participant this study