1. Identification of Functional HLA-A*01:01–Restricted Epstein-Barr Latent Membrane Protein 2–Specific T-Cell Receptors
- Author
-
Lieve E. van der Maarel, J.H. Frederik Falkenburg, Rob C. M. de Jong, Ilse Gille, Inge Jedema, Wesley Huisman, Derk Amsen, Lois Hageman, Laura T. Morton, Mirjam H.M. Heemskerk, Graduate School, Medical Biology, Landsteiner Laboratory, and AII - Inflammatory diseases
- Subjects
0301 basic medicine ,Epstein-Barr Virus Infections ,Herpesvirus 4, Human ,Adoptive cell transfer ,Receptors, Antigen, T-Cell ,lymphoma ,chemical and pharmacologic phenomena ,Human leukocyte antigen ,Biology ,medicine.disease_cause ,virus-specific T cells ,Viral Matrix Proteins ,EBV-associated malignancies ,Interferon-gamma ,03 medical and health sciences ,0302 clinical medicine ,hemic and lymphatic diseases ,otorhinolaryngologic diseases ,medicine ,Humans ,Epstein-Barr virus ,Immunology and Allergy ,Secretion ,Receptor ,Cytotoxicity ,HLA-A Antigens ,nasopharyngeal carcinoma ,T-cell receptor ,Epstein–Barr virus ,Molecular biology ,HLA-A ,030104 developmental biology ,Infectious Diseases ,TCR-gene transfer ,030220 oncology & carcinogenesis - Abstract
Background Adoptive transfer of genetically engineered T cells expressing antigen-specific T-cell receptors (TCRs) is an appealing therapeutic approach for Epstein-Barr virus (EBV)–associated malignancies of latency type II/III that express EBV antigens (LMP1/2). Patients who are HLA-A*01:01 positive could benefit from such products, since no T cells recognizing any EBV-derived peptide in this common HLA allele have been found thus far. Methods HLA-A*01:01–restricted EBV-LMP2–specific T cells were isolated using peptide major histocompatibility complex (pMHC) tetramers. Functionality was assessed by production of interferon gamma (IFN-γ) and cytotoxicity when stimulated with EBV-LMP2–expressing cell lines. Functionality of primary T cells transduced with HLA-A*01:01–restricted EBV-LMP2–specific TCRs was optimized by knocking out the endogenous TCRs of primary T cells (∆TCR) using CRISPR-Cas9 technology. Results EBV-LMP2–specific T cells were successfully isolated and their TCRs were characterized. TCR gene transfer in primary T cells resulted in specific pMHC tetramer binding and reactivity against EBV-LMP2–expressing cell lines. The mean fluorescence intensity of pMHC-tetramer binding was increased 1.5–2 fold when the endogenous TCRs of CD8+ T cells was knocked out. CD8+/∆TCR T cells modified to express EBV-LMP2–specific TCRs showed IFN-γ secretion and cytotoxicity toward EBV-LMP2–expressing malignant cell lines. Conclusions We isolated the first functional HLA-A*01:01–restricted EBV-LMP2–specific T-cell populations and TCRs, which can potentially be used in future TCR gene therapy to treat EBV-associated latency type II/III malignancies.
- Published
- 2020
- Full Text
- View/download PDF