Animal models have demonstrated that the passive transfer of immune lymphoid cells can mediate the regression of established metastatic disease and result in systemic immunity. Our approach in isolating immune lymphoid cells has been the use of lymph nodes (LN) draining progressive tumors or inoculation sites of tumor vaccines. In animal models, we have observed that tumor-draining or vaccine-primed LN harbor """"""""pre-effector"""""""" lymphoid cells which are not fully functional in mediating in vivo tumor regression. However, during secondary in vitro activation with anti-CD3 monoclonal antibody (anti-CD3) followed by expansion in IL-2, the LN cells acquire immune competence in mediating specific tumor regression. Based upon our animal models, we have been conducting clinical trials evaluating the antitumor reactivity of vaccine primed LN cells given as adoptive immunotherapy in patients with stage IV malignancies. We have identified the presence of tumor-specific T cells in vaccine-primed draining LN (VPLN) which have been secondarily activated with anti-CD3. Furthermore, we have documented durable tumor responses in patients with stage IV renal cell cancer (RCC) who have received anti-CD3 activated VPLN cells in a phase II trial. In subsequent animal models, we have recently found that the co-stimulation of VPLN cells with anti-CD28 monoclonal antibody (anti-CD28) in conjunction with antiCD3 resulted in significantly enhanced in vitro and in vivo antitumor reactivity. Based upon these recent observations we propose to evaluate the therapeutic efficacy of anti-CD3/anti-CD28 activated VPLN cells in the adoptive immunotherapy of patients with stage IV RCC.
The specific aims of the proposal are: 1. Conduct a phase II trial of anti-CD3/anti-CD28 activated LN cells primed by autologous tumor cell vaccination and adoptively transferred in patients with stage IV RCC. 2. To correlate in vivo tumor responses with in vitro immune responses. 3. To characterize the CD4+ and CD8+ T cell responses in peripheral blood lymphocytes (PBL) and VPLN cells after autologous tumor vaccination. 4. To identify novel tumor associated antigens in RCC. This proposal is being submitted as an Interactive Research Project Grant (IRPG) in conjunction with another RO1 application submitted by Dr. Lloyd Stoolman. Dr. Stoolman plans to examine novel methods to enrich tumor reactive lymphoid cells based upon adhesion marker expansion utilizing samples generated from this proposal.

National Institute of Health (NIH)
National Cancer Institute (NCI)
Research Project (R01)
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Special Emphasis Panel (ZRG1-ET-1 (01))
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Xie, Heng
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University of Michigan Ann Arbor
Schools of Medicine
Ann Arbor
United States
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