Method for allogeneic cell therapy
A method of manipulating allogeneic cells for use in allogeneic cell therapy protocols is described. The method provides a composition of highly activated allogeneic T-cells which are infused into immunocompetent cancer patients to elicit a novel anti-tumor immune mechanism called the “Mirror Effect”. In contrast to current allogeneic cell therapy protocols where T-cells in the graft mediate the beneficial graft vs. tumor (GVT) and detrimental graft vs. host (GVH) effects, the allogeneic cells of the present invention stimulate host T-cells to mediate the “mirror” of these effects. The mirror of the GVT effect is the host vs. tumor (HVT) effect. The “mirror” of the GVH effect is the host vs. graft (HVG) effect. The effectiveness and widespread application of the anti-tumor GVT effect is limited by the severe toxicity of the GVH effect. In the present invention, the anti-tumor HVT effect occurs in conjunction with a non-toxic HVG rejection effect. The highly activated allogeneic cells of the invention can be used to stimulate host immunity in a complete HLA mis-matched setting in patients that have not had a prior bone marrow transplant or received chemotherapy and/or radiation conditioning regimens.
1. A method for allogeneic cell therapy in a diseased patient, the method comprising:
collecting blood cells from a healthy donor where at least a portion are T-cells;
activating said T-cells so that the T-cells are capable of stimulating an effective immune response by the patient; and
administering said T-cells to the patient, wherein the T-cells are allogeneic and intentionally histocompatibility mismatched to the patient and the patient has not been pre-conditioned with chemotherapy or other immunosuppressive treatment.
2. The method of claim 1 wherein the healthy donor has less than or equal to a 50% tissue match to the patient.
3. The method of claim 1 wherein the activation of T-cells is caused by cross-linking CD3 and CD28 surface antigens.
4. The method of claim 1 wherein the T-cells are predominantly CD4+ T-cells.
5. The method of claim 4 wherein the CD4+ T-cells are predominantly Th1 cells.
6. The method of claim 1 wherein the disease comprises a hematological malignancy, a solid tumor, a solid tumor that has metastasized, or a viral infection.
7. A method for allogeneic cell therapy in a diseased patient, the method comprising administering allogeneic activated T-cells to the patient, the T-cells derived from blood cells collected from a healthy donor, wherein the T-cells are intentionally histocompatibility mismatched to the patient and the patient has not been pre-conditioned with chemotherapy or other immunosuppressive treatment, the activated T-cells capable of stimulating an effective immune response by the patient.
8. The method of claim 7 wherein the healthy donor has less than or equal to a 50% tissue match to the patient.
9. The method of claim 7 wherein the activation of T-cells is caused by cross-linking CD3 and CD28 surface antigens.
10. The method of claim 7 wherein the T-cells are predominantly CD4+ T-cells.
11. The method of claim 10 wherein the CD4+ T-cells are predominantly Th1 cells.
12. The method of claim 7 wherein the disease comprises a hematological malignancy, a solid tumor, a solid tumor that has metastasized, or a viral infection.