PMID- 21979579 OWN - NLM STAT- MEDLINE DCOM- 20120816 LR - 20201215 IS - 1476-5500 (Electronic) IS - 0929-1903 (Linking) VI - 19 IP - 2 DP - 2012 Feb TI - Retargeting NK92 cells using an HLA-A2-restricted, EBNA3C-specific chimeric antigen receptor. PG - 84-100 LID - 10.1038/cgt.2011.66 [doi] AB - Advances in adoptive cell immunotherapy have led to several promising options for cancer patients. Single-chain variable fragments (scFvs) were isolated from a human phage display library by panning on recombinant human leukocyte antigen (HLA)-A2-peptide complexes. A scFv (EBNA Clone 315) specific for HLA-A2 carrying a 10 amino acid peptide (LLDFVRFMGV) derived from the Epstein-Barr virus latent protein EBNA3C was fully characterized. EBNA Clone 315 displayed exquisite specificity toward its targeted T-cell epitope (TCE) and did not cross-react with the free peptide, HLA-A2 complexes, which carried irrelevant peptides, or HLA-A2(-) cells. Furthermore, after engineering into a scFv-Fc fusion protein, we were able to determine its affinity, detection sensitivity, and ability to induce antibody-dependent cellular cytotoxicity (ADCC). As a proof-of-principle, a chimeric antigen receptor (CAR) version of EBNA Clone 315 was used to reprogram NK92MI cells. CAR-expressing NK92MI cells showed highly specific and potent cytotoxicity toward the targeted TCE, with detection sensitivity of approximately 25 molecules and cytolytic capacity threefold greater than scFv-Fc-mediated ADCC. For the first time, we show the successful reprogramming of non-T cells toward a specific TCE using a CAR. FAU - Tassev, D V AU - Tassev DV AD - Department of Pediatrics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. FAU - Cheng, M AU - Cheng M FAU - Cheung, N-K V AU - Cheung NK LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20111007 PL - England TA - Cancer Gene Ther JT - Cancer gene therapy JID - 9432230 RN - 0 (Antigens, Viral) RN - 0 (EBNA-3C, epstein-barr virus) RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (Epstein-Barr Virus Nuclear Antigens) RN - 0 (HLA-A2 Antigen) RN - 0 (Immunoglobulin Fragments) RN - 0 (Oligopeptides) RN - 0 (Receptors, Antigen) SB - IM MH - Animals MH - Antigens, Viral/*immunology MH - CHO Cells MH - Cell Line MH - Chimerism MH - Cricetinae MH - Epitopes, T-Lymphocyte/immunology MH - Epstein-Barr Virus Nuclear Antigens MH - HLA-A2 Antigen/genetics/*immunology MH - Humans MH - Immunoglobulin Fragments/immunology MH - Killer Cells, Natural/*immunology MH - Oligopeptides/*immunology/metabolism MH - Receptors, Antigen/genetics/*immunology EDAT- 2011/10/08 06:00 MHDA- 2012/08/17 06:00 CRDT- 2011/10/08 06:00 PHST- 2011/10/08 06:00 [entrez] PHST- 2011/10/08 06:00 [pubmed] PHST- 2012/08/17 06:00 [medline] AID - cgt201166 [pii] AID - 10.1038/cgt.2011.66 [doi] PST - ppublish SO - Cancer Gene Ther. 2012 Feb;19(2):84-100. doi: 10.1038/cgt.2011.66. Epub 2011 Oct 7.