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- W2019738045 abstract "Summary The protein p53 has been shown to be an efficient tumour antigen in both murine and human cancer vaccine studies and cancer vaccines targeting p53 based on major histocompatibility complex (MHC) class I binding p53‐derived peptides that induce cytotoxic T lymphocytes (CTLs) without p53‐specific CD4 + T‐cell help have been tested by several research groups including ours. To obtain such CD4 + T‐cell help and cover a broader repertoire of MHC haplotypes we have previously attempted to produce recombinant human p53 for vaccination purposes. However, attempts to refold a hexahis‐tagged p53 protein in our laboratory were unsuccessful. Here, we show that fusion of an 11‐amino‐acid region of the human immunodeficiency virus TAT protein transduction domain (PTD) to human p53 increases the solubility of the otherwise insoluble p53 protein and this rTAT‐p53 protein can be transduced into human monocyte‐derived dendritic cells (DCs). The induction of a p53‐specific HLA‐A*0201 immune response was tested in HLA‐A*0201/K b transgenic mice after immunization with rTAT‐p53‐transduced bone‐marrow‐derived DCs. In these mice, p53‐specific CD4 + and CD8 + T‐cell proliferation was observed and immunization resulted in the induction of HLA‐A*0201‐restricted CTLs specific for two human p53‐derived HLA‐A*0201‐binding peptides, p53 65−73 and p53 149−157 . Addition of GrpE to generate rTAT‐GrpE‐p53 led to a further increase in protein solubility and to a small increase in DC maturation but did not increase the observed p53‐specific T‐cell responses. The use of rTAT‐p53 in ongoing clinical protocols should be applicable and offers advantages to current strategies omitting the use of HLA‐typed patients." @default.
- W2019738045 created "2016-06-24" @default.
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- W2019738045 date "2007-07-04" @default.
- W2019738045 modified "2023-10-15" @default.
- W2019738045 title "Addition of TAT protein transduction domain and GrpE to human p53 provides soluble fusion proteins that can be transduced into dendritic cells and elicit p53-specific T-cell responses in HLA-A*0201 transgenic mice" @default.
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- W2019738045 doi "https://doi.org/10.1111/j.1365-2567.2007.02643.x" @default.
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