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  • Title: Immunization with a recombinant MAGE-A3 protein after high-dose therapy for myeloma.
    Author: Szmania S, Gnjatic S, Tricot G, Stone K, Zhan F, Moreno A, Thuro B, Melenhorst J, Barrett J, Shaughnessy J, Old LJ, Barlogie B, Brichard VG, van Rhee F.
    Journal: J Immunother; 2007; 30(8):847-54. PubMed ID: 18049337.
    Abstract:
    MAGE-A3 is frequently expressed in high-risk multiple myeloma (MM). We immunized a healthy donor with MAGE-A3 protein formulated in AS02B to transfer immunity to her identical twin, diagnosed with MAGE-A3-positive MM. After a melphalan 200 mg/m syngeneic peripheral blood stem cell transplant, primed donor cells collected after immunizations were transferred and followed by repeated patient immunizations. MAGE-A3 immunizations were well tolerated. Strong MAGE-A3-specific antibody, cytotoxic T-lymphocyte (CTL), and T-helper responses were induced in both twins. A humoral response was transferred to the patient with the donor peripheral blood stem cells and increased by booster immunization. The CTL response targeted a previously undescribed HLA-A*6801 binding MAGE-A3115-123 peptide. MAGE-A3115-123 CTLs were detected in the patient more than 1 year after the last immunization. Multiple T-helper cellular responses were detected with the dominant response to an HLA-DR11 restricted MAGE-A3 epitope. The patient remains in remission 2.5 years after the second transplant. This report shows for the first time that immunization of a healthy donor with a defined cancer-testis protein induces immune responses that can be transferred and expanded posttransplant in the recipient. MAGE-A3 immunization may be a useful adjunct to high dose melphalan-based peripheral blood stem cell transplant, providing a new therapeutic option for high-risk MM.
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