The clinical use of lymphocytes engineered to express high affinity T-cell receptors (TCRs) specific for two broadly expressed tumor-associated antigens is strongly limited by MHC-restricted fratricide of lymphocytes and TCR-mediated killing of hematopoietic stem cells. Specific clinical applications must therefore be conceived to bypass these limitations.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583918PMC
http://dx.doi.org/10.4161/onci.22410DOI Listing

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