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2013 ; 4
(ä): 389
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A Novel Method Linking Antigen Presentation by Human Monocyte-Derived Macrophages
to CD8(+)?T Cell Polyfunctionality
#MMPMID24312096
Short KR
; Grant EJ
; Vissers M
; Reading PC
; Diavatopoulos DA
; Kedzierska K
Front Immunol
2013[]; 4
(ä): 389
PMID24312096
show ga
To understand the interactions between innate and adaptive immunity, and
specifically how virally infected macrophages impact T cell function, novel
assays examining the ability of macrophages to present antigen to CD8(+) T cells
are needed. In the present study, we have developed a robust in vitro assay to
measure how antigen presentation by human monocyte-derived macrophages (MDMs)
affects the functional capacity of autologous CD8(+) T cells. The assay is based
on the polyfunctional characteristics of antigen-specific CD8(+) T cells, and is
thus called a Mac-CD8 Polyfunctionality Assay. Following purification of
monocytes and their maturation to MDMs, MDMs were pulsed with an antigenic
peptide to be presented to CD8(+) T cells. Peptide-pulsed MDMs were then
incubated with antigen-specific CD8(+) T cells in order to assess the efficacy of
antigen presentation to T cells. CD8(+) T cell polyfunctionality was assessed by
staining with mAbs to IFN-?, TNF-?, and CD107a in a multi-color intracellular
cytokine staining assay. To highlight the utility of the Mac-CD8
Polyfunctionality Assay, we assessed the effects of influenza infection on the
ability of human macrophages to present antigen to CD8(+) T cells. We found that
influenza infection of human MDMs can alter the effector efficacy of MDMs to
activate more CD8(+) T cells with cytotoxic capacity. This has important
implications for understanding how the virus-infected macrophages affect adaptive
immunity at the site of infection.