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- W2171198930 abstract "Abstract Purpose: Immune responses to gene-modified cells are a concern in the field of human gene therapy, as they may impede effective treatment. We conducted 2 clinical trials in which cancer patients were treated with lymphocytes genetically engineered to express murine T-cell receptors (mTCR) specific for tumor-associated antigens p53 and gp100. Experimental Design: Twenty-six patients treated with autologous lymphocytes expressing mTCR had blood and serum samples available for analysis. Patient sera were assayed for the development of a humoral immune response. Adoptive cell transfer characteristics were analyzed to identify correlates to immune response. Results: Six of 26 (23%) patients' posttreatment sera exhibited specific binding of human anti-mTCR antibodies to lymphocytes transduced with the mTCR. Antibody development was found in both responding and nonresponding patients. The posttreatment sera of 3 of these 6 patients mediated a 60% to 99% inhibition of mTCR activity as measured by a reduction in antigen-specific interferon-γ release. Detailed analysis of posttreatment serum revealed that antibody binding was β-chain specific in 1 patient whereas it was α-chain specific in another. Conclusions: A subset of patients treated with mTCR-engineered T cells developed antibodies directed to the mTCR variable regions and not to the constant region domains common to all mTCR. Overall, the development of a host immune response was not associated with the level of transduced cell persistence or response to therapy. In summary, patients treated with mTCR can develop an immune response to gene-modified cells in a minority of cases, but this may not affect clinical outcome. Clin Cancer Res; 16(23); 5852–61. ©2010 AACR." @default.
- W2171198930 created "2016-06-24" @default.
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- W2171198930 date "2010-12-01" @default.
- W2171198930 modified "2023-10-15" @default.
- W2171198930 title "Development of Human Anti-Murine T-Cell Receptor Antibodies in Both Responding and Nonresponding Patients Enrolled in TCR Gene Therapy Trials" @default.
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- W2171198930 doi "https://doi.org/10.1158/1078-0432.ccr-10-1280" @default.
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