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- W2306763867 abstract "Purpose: Preclinical studies showed that immunization with peripheral blood mononuclear cells (PBMC) loaded with tumor antigen peptides plus interleukin-12 (IL-12) induced CD8 T-cell responses and tumor rejection. We recently determined that recombinant human (rh) IL-12 at 30 to 100 ng/kg is effective as a vaccine adjuvant in patients. A phase II study of immunization with Melan-A peptidepulsed PBMC rhIL-12 was conducted in 20 patients with advanced melanoma. Patients and Methods: Patients were HLA-A2–positive and had documented Melan-A expression. Immunization was performed every 3 weeks with clinical re-evaluation every three cycles. Immune responses were measured by ELISpot assay before and after treatment and through the first three cycles, and were correlated with clinical outcome. Results: Most patients had received prior therapy and had visceral metastases. Nonetheless, two patients achieved a complete response, five patients achieved a minor or mixed response, and four patients had stable disease. The median survival was 12.25 months for all patients and was not yet reached for those with a normal lactate dehydrogenase. There were no grade 3 or 4 toxicities. Measurement of specific CD8 T-cell responses by direct ex vivo ELISpot revealed a significant increase in interferon gamma–producing T cells against Melan-A (P .015) after vaccination, but not against an Epstein-Barr virus control peptide (P .86). There was a correlation between the magnitude of the increase in MelanA–specific cells and clinical response (P .046). Conclusion: This immunization approach may be more straightforward than dendritic cell strategies and seems to have clinical activity that can be correlated to a biologic end point. J Clin Oncol 21:2342-2348. © 2003 by American Society of Clinical Oncology." @default.
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- W2306763867 title "Immunization W ith M elan-A P eptide-Pulsed P eripheral B lood Mononuclear C ells P lus R ecombinant H uman I nterleukin-12 Induces C linical A ctivity a nd T -Cell R esponses i n Advanced M elanoma" @default.
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