Clinical Application of Stem Cell Educator Therapy in Type 1 Diabetes

Overview

Type 1 diabetes (T1D) is a T cell-mediated autoimmune disease that causes a deficit of pancreatic islet beta cells. Millions of individuals worldwide have T1D, and incidence increases annually. Several recent clinical trials point to the need for an approach that produces comprehensive immune modulation at both the local pancreatic and systemic levels. Stem Cell Educator (SCE) therapy offers comprehensive immune modulation at both the local and systemic levels in T1D by using a patient's own immune cells (including platelets) that are "educated" by cord blood stem cells. Tested clinically in more than 200 patients, SCE therapy has shown lasting reversal in autoimmunity in T1D patients, including improved C-peptide levels, reduced median glycated hemoglobin A1C (HbA1C) values, and decreased median daily usage of insulin. SCE therapy circulates a patient's blood through a blood cell separator, briefly cocultures the patient's immune cells with adherent Cord Blood Stem Cells (CB-SCs) in vitro, and returns the "educated" autologous immune cells to the patient's circulation.

Description

The SCE device is made of a hydrophobic material from FDA-approved (USP Class VI) dishes that tightly binds stem cells CB-SCs without interfering with their immune modulating capability. We originally designed a chamber for co-culture of lymphocytes and CB-SCs that included nine discs of the material with a flow pathway and adherent CB-SCs sandwiched between a top cover plate and a bottom collecting plate. In this trial, we are going to use the 12-layer SCE device.

The SCE therapy carried a lower risk of infection than a typical blood transfusion, and did not introduce stem cells or reagents into the patients. In addition, CB-SCs have very low immunogenicity, and the CB-SCs cultured in the device are a highly restricted population and contain no CD3+ T cells or other lymphocyte subsets, eliminating the need for human leukocyte antigen (HLA) matching prior to treatment. This innovative approach has the potential to provide CB-SC-mediated immune modulation therapy for multiple autoimmune diseases while mitigating the safety and ethical concerns associated with other approaches such as T1D, type 2 diabetes (T2D), and alopecia areata (AA) in clinics. The relative simplicity of the approach may also provide cost and time savings relative to other approaches.

Eligibility

Inclusion Criteria:

1. Adult patients ( 14 years)
2. Must have a diagnosis of type 1 diabetes mellitus based on the 2015 American Diabetes Association criteria for the Clarification and Diagnosis of diabetes.
3. Must have a blood test confirming the presence of at least one autoantibody to pancreatic islet Cells (IAA, IA2, GAD 65, ZnT8).
4. Fasting C-peptide level > 0.3 ng/ml
5. HbA1C < 10% at enrollment
6. Recent diagnosis (within two years of enrollment)
7. Adequate venous access for apheresis
8. Must be equipped with a continuous glucose monitoring system (CGMS)
9. Ability to provide informed consent
10. For female patients only, willingness to use FDA-recommended birth control (http://www.fda.gov/downloads/ForConsumers/ByAudience/ForWomen/FreePublications/UCM356 451.pdf) until 6 months post treatment.
11. Must agree to comply with all study requirements and be willing to complete all study visits

Exclusion Criteria:

1. AST or ALT 2 > x upper limit of normal.
2. Abnormal bilirubin (total bilirubin > 1.2 mg/dL, direct bilirubin > 0.4 mg/dL)
3. Creatinine > 2.0 mg/dl.
4. Known coronary artery disease or EKG suggestive of coronary artery disease unless cardiac clearance for apheresis is obtained from a cardiologist.
5. Known active infection such as Hepatitis B, Hepatitis C, or Human Immunodeficiency Virus (HIV)
6. Pregnancy assessed by a positive serum pregnancy test or breastfeeding mothers
7. Use of immunosuppressive medication within one month of enrollment including but not limited to prednisone, cyclosporine, tacrolimus, sirolimus, and chemotherapy.
8. Presence of any other autoimmune diseases (lupus, rheumatoid arthritis, scleroderma, etc.)
9. Anticoagulation other than ASA.
10. Hemoglobin < 10 g/dl or platelets < 100 k/ml
11. Is unable or unwilling to provide informed consent
12. Presence of any other physical or psychological medical condition that, in the opinion of the investigator, would preclude participation