Generation of cytomegalovirus (CMV)-specific CD4 T cell lines devoid of alloreactivity, by use of a mixture of CMV-phosphoprotein 65 peptides for reconstitution of the T helper repertoire - PubMed (original) (raw)
. 2005 Jan 15;191(2):215-26.
doi: 10.1086/427040. Epub 2004 Dec 14.
Affiliations
- PMID: 15609231
- DOI: 10.1086/427040
Generation of cytomegalovirus (CMV)-specific CD4 T cell lines devoid of alloreactivity, by use of a mixture of CMV-phosphoprotein 65 peptides for reconstitution of the T helper repertoire
Giuseppina Li Pira et al. J Infect Dis. 2005.
Abstract
Background: CD8 cells specific for cytomegalovirus (CMV) provide valuable support in immunocompromised patients. Recent studies have focused on the generation of cytotoxic T lymphocyte (CTL) lines by use of new biotechnological techniques. Yet CD4 cells have been neglected, even though they contribute to the persistence of adoptively transferred CTLs.
Methods: We identified novel T helper (Th) peptides recognized by CD4 cells on the immunodominant protein pp65. These peptides were used as a mixture to generate CD4 cell lines.
Results: The peptide library, which, theoretically, is recognized by 85% of white individuals on the basis of the frequency of the relevant human leukocyte antigen class II alleles, was stimulatory for 82% of pp65 responders. T cell lines generated by use of the pool recognized protein antigens. Selection for CMV-specific cells resulted in rapid depletion of allospecific T cells. Selection with individual peptides allowed further selection against potential cross-alloreactivity. Cultured CD4 cells showed no signs of functional senescence. CD4 cells activated by use of a Th peptide helped expand CMV-specific CTLs.
Conclusions: By use of a simple procedure, an immunodominant peptide library can generate T cell lines from allodonors, for the perspective reconstitution of the Th repertoire in immunocompromised hemopoietic stem-cell transplant recipients.
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