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Adhikary, D. ; Behrends, U. ; Feederle, R.* ; Delecluse, H.J.* ; Mautner, J.

Standardized and highly efficient expansion of Epstein-Barr virus-specific CD4+ T cells by using virus-like particles.

J. Virol. 82, 3903-3911 (2008)
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Epstein-Barr virus (EBV)-specific T-cell lines generated by repeated stimulation with EBV-immortalized lymphoblastoid B-cell lines (LCL) have been successfully used to treat EBV-associated posttransplant lymphoproliferative disease (PTLD) in hematopoietic stem cell transplant recipients. However, PTLD in solid-organ transplant recipients and other EBV-associated malignancies respond less efficiently to this adoptive T-cell therapy. LCL-stimulated T-cell preparations are polyclonal and contain CD4(+) and CD8(+) T cells, but the composition varies greatly between lines. Because T-cell lines with higher CD4(+) T-cell proportions show improved clinical efficacy, we assessed which factors might compromise the expansion of this T-cell population. Here we show that spontaneous virus production by LCL and, hence, the presentation of viral antigens varies intra- and interindividually and is further impaired by acyclovir treatment of LCL. Moreover, the stimulation of T cells with LCL grown in medium supplemented with fetal calf serum (FCS) caused the expansion of FCS-reactive CD4(+) T cells, whereas human serum from EBV-seropositive donors diminished viral antigen presentation. To overcome these limitations, we used peripheral blood mononuclear cells pulsed with nontransforming virus-like particles as antigen-presenting cells. This strategy facilitated the specific and rapid expansion of EBV-specific CD4(+) T cells and, thus, might contribute to the development of standardized protocols for the generation of T-cell lines with improved clinical efficacy.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0022-538X
e-ISSN 1098-5514
Journal Journal of Virology
Quellenangaben Volume: 82, Issue: 8, Pages: 3903-3911 Article Number: , Supplement: ,
Publisher American Society for Microbiology (ASM)
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) CCG Pediatric Tumor Immunology (AGV-KPT)