T-cell lines specific for peptides of adenovirus hexon protein and devoid of alloreactivity against recipient cells can be obtained from HLA-haploidentical donors

Patrizia Comoli, Marco W. Schilham, Sabrina Basso, Tamara Van Vreeswijk, Maria Ester Bernardo, Rita Maccario, M. J D Van Tol, Franco Locatelli, Louise A. Veltrop-Duits

Research output: Contribution to journalArticle

Abstract

Human adenovirus (HAdV) infection may cause lifethreatening complications in recipients of hematopoietic stem cell transplantation (HSCT), the highest risk being observed in children given T-cell depleted haploidentical allografts. The effectiveness of pharmacologic therapy for HAdV infection is suboptimal. Recently, cell therapy was demonstrated to offer a unique opportunity to restore antiviral immune surveillance, leading to clearance of infection and prevention/treatment of disease. However, infusion of insufficiently selected HAdVspecific T cells in haplo-HSCT may increase the risk of graftversus- host disease. We conducted scale-up experiments to validate a method of in vitro culture to expand T cells specific for HAdV from donor peripheral blood mononuclear cells (PBMC), based on stimulation with a pool of five 30-mer peptides derived from HAdV5 hexon protein, for use in recipients of haplo-HSCT. A total of 21 T-cell lines that included a majority of CD4+ T lymphocytes, were generated. Nineteen of the 21 T-cell lines proliferated specifically against HAdV. The 2 nonspecific, and 3 T-cell lines with lower specific activity, included a median of 48% CD8+ T cells. The 19 HAdV-specific T-cell lines showed a median 357-fold decrease in alloreactivity, compared with proliferation of noncultured donor PBMC in response to recipient PBMC, only 4/19 T-cell lines showing residual alloreactivity. Our data indicate that HAdV-specific CD4+ T-cell lines with efficient in vitro antiviral response and low/undetectable alloreactivity against recipient targets may be expanded from PBMC of most human leukocyte antigen-haploidentical HSCT donors after stimulation with HAdV hexon protein-derived peptides. These T cells may be safely employed for adoptive treatment of HAdV complications.

Original languageEnglish
Pages (from-to)529-536
Number of pages8
JournalJournal of Immunotherapy
Volume31
Issue number6
DOIs
Publication statusPublished - Jul 2008

Keywords

  • Adenovirus infection
  • Adoptive immunotherapy
  • Pediatric HSCT
  • T-cell lines

ASJC Scopus subject areas

  • Cancer Research
  • Immunology
  • Immunology and Allergy
  • Pharmacology

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