Human T cells expressing two additional receptors (TETARs) specific for HIV-1 recognize both epitopes.

Abstract:

:Adoptive TCR transfer against rapidly mutating targets, such as HIV-1 or cancer, must counteract corresponding immune escape. Hence, we generated T cells expressing two additional receptors (TETARs) specific for HIV-1 by TCR mRNA electroporation. An HLA-A2-restricted gag-specific TCR and an HLA-B13-restricted nef-specific TCR were chosen. When both TCRs were transfected simultaneously, strong competitive effects occurred that were overcome by replacing the human constant domains of one TCR with murine counterparts and adapting the amounts of TCR-RNA used for transfection. The resulting TETAR responded to both epitopes with cytokine secretion and cytotoxic function. Cell sorting revealed that one individual cell indeed recognized both epitopes. The T cells diminished their reactivity to each epitope after stimulation but sequentially killed targets that presented the gag epitope and then targets that presented the nef epitope, or vice versa. Taken together, TETARs represent a sophisticated tool to study TCR functionality and might be a useful strategy in immunotherapy.

journal_name

Blood

journal_title

Blood

authors

Hofmann C,Höfflin S,Hückelhoven A,Bergmann S,Harrer E,Schuler G,Dörrie J,Schaft N,Harrer T

doi

10.1182/blood-2011-04-347005

subject

Has Abstract

pub_date

2011-11-10 00:00:00

pages

5174-7

issue

19

eissn

0006-4971

issn

1528-0020

pii

blood-2011-04-347005

journal_volume

118

pub_type

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