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2016 ; 113
(13
): E1890-7
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Detection, phenotyping, and quantification of antigen-specific T cells using a
peptide-MHC dodecamer
#MMPMID26979955
Huang J
; Zeng X
; Sigal N
; Lund PJ
; Su LF
; Huang H
; Chien YH
; Davis MM
Proc Natl Acad Sci U S A
2016[Mar]; 113
(13
): E1890-7
PMID26979955
show ga
Here we report a peptide-MHC (pMHC) dodecamer as a "next generation" technology
that is a significantly more sensitive and versatile alternative to pMHC
tetramers for the detection, isolation, and phenotypic analysis of
antigen-specific T cells. In particular, dodecamers are able to detect two- to
fivefold more antigen-specific T cells in both human and murine CD4(+)and
CD8(+)?? T-cell compartments compared with the equivalent tetramers. The
low-affinity, tetramer-negative, dodecamer-positive T cells showed comparable
effector cytokine responses as those of high-affinity, tetramer-positive T cells.
Dodecamers are able to detect early stage CD4(+)CD8(+)double-positive thymocytes
on which T-cell receptors are 10- to 30-fold less dense than mature T cells.
Dodecamers also show utility in the analysis of ?? T cells and in cytometry by
time-of-flight applications. This construct has a simple structure with a central
scaffold protein linked to four streptavidin molecules, each having three pMHC
ligands or other molecules. The dodecamer is straightforward and inexpensive to
produce and is compatible with current tetramer technology and commercially
available streptavidin conjugates.