Intracerebral Transplantation of Neural Stem Cells for the Treatment of Ischemic Stroke

Inclusion Criteria: 1. Have the ability to understand the requirements of the study, provide written informed consent, understand and provide written authorization for the use and disclosure of Protected Health Information (PHI) \[per Health Insurance Portability and Accountability Act (HIPAA) Privacy Ruling\] and comply with the study procedures 2. Men and women 30-65 years old 3. Women must have a negative serum pregnancy test and practice an acceptable method of contraception or be of non-childbearing potential (post-menopausal for at least 2 years or who have undergone hysterectomy or oophorectomy or surgical sterilization) 4. At least 3 months but no more than 24 months from time of stroke, with a motor neurological deficit 5. Documented history of completed ischemic stroke in subcortical region of MCA or lenticulostriate artery with or without cortical involvement, with correlated findings by MRI 6. Modified Rankin Score of 2, 3 or 4 7. FMMS score of 55 or less; 8. Two evaluations at approximately 3 weeks apart prior to surgery with less than +/- 4 point change in the NIHSS 9. Able and willing to meet all follow-up requirements 10. Able and willing to undergo post-physical therapy/rehabilitation Exclusion Criteria: 1. Any disabling psychological or psychiatric disorders which may confound the study 2. History of more than one symptomatic stroke, TIAs allowed 3. History of another major neurological disease or injury 4. Cerebral infarct size \>8cm in any one measurement 5. Myocardial infarction within the prior 3 months 6. History of seizures or current use of antiepileptic medication 7. Receipt of any investigational drug or device within 30 days 8. Receipt of any cell infusion other than blood transfusion 9. Any concomitant medical disease or condition noted below: 1. Coagulopathy with INR \> 1.4 at the time of surgery 2. Panel Reactive Antibodies (PRA) \> 20% at initial screen 3. Active infection at the time of surgery 4. Active hypotension requiring vasopressor therapy 5. Skin breakdown over the site of surgery 6. Active or history of malignancy 7. Primary or secondary immune deficiency 8. Persistent MRI artifact that would prevent imaging pre and post-operation or unable to undergo MRI 9. Creatinine \>115μmol/L, liver function tests (SGOT/SGPT, Bilirubin, Alk Phos) \> 2x upper limit of normal, hematocrit/hemoglobin \< 30/10, total WBC \< 4000/mm3,platelet count \<100,000/mm3, uncontrolled hypertension (systolic \> 180mmHg or diastolic\> 100mmHg) or uncontrolled diabetes (defined as hemoglobin A1C\>8%), evidence of GI bleeding by hemoccult test,positive tuberculosis (TB test: PPD/Mantoux), hepatitis B or C, or human immunodeficiency virus (HIV) 10. Presence of any of the following conditions: 1. Current drug abuse or alcoholism 2. Unstable medical conditions 3. Unstable psychiatric illness including psychosis and untreated major depression 11. Any condition that the Investigator or primary physician feels may interfere with participation in the study or may endanger the subject 12. Any condition that the surgeon feels may pose complications for the surgery 13. Known hypersensitivity to tacrolimus or methylprednisolone 14. Unable or unwilling to participate in physical and/or occupational therapy or return to clinic for follow up examinations as scheduled 15. Inability to provide informed consent as determined by screening protocol. 16. Use of antiplatelet drugs less than 2 weeks before surgery