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2014 ; 41
(4
): 633-45
Nephropedia Template TP
gab.com Text
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English Wikipedia
CD4+ T cell help guides formation of CD103+ lung-resident memory CD8+ T cells
during influenza viral infection
#MMPMID25308332
Laidlaw BJ
; Zhang N
; Marshall HD
; Staron MM
; Guan T
; Hu Y
; Cauley LS
; Craft J
; Kaech SM
Immunity
2014[Oct]; 41
(4
): 633-45
PMID25308332
show ga
Tissue-resident memory T (Trm) cells provide enhanced protection against
infection at mucosal sites. Here we found that CD4(+) T cells are important for
the formation of functional lung-resident CD8(+) T cells after influenza virus
infection. In the absence of CD4(+) T cells, CD8(+) T cells displayed reduced
expression of CD103 (Itgae), were mislocalized away from airway epithelia, and
demonstrated an impaired ability to recruit CD8(+) T cells to the lung airways
upon heterosubtypic challenge. CD4(+) T cell-derived interferon-? was necessary
for generating lung-resident CD103(+) CD8(+) Trm cells. Furthermore, expression
of the transcription factor T-bet was increased in "unhelped" lung Trm cells, and
a reduction in T-bet rescued CD103 expression in the absence of CD4(+) T cell
help. Thus, CD4(+) T cell-dependent signals are important to limit expression of
T-bet and allow for the development of CD103(+) CD8(+) Trm cells in the lung
airways following respiratory infection.
|*Immunologic Memory
[MESH]
|Animals
[MESH]
|Antigens, CD/immunology
[MESH]
|CD4-Positive T-Lymphocytes/*immunology
[MESH]
|CD8-Positive T-Lymphocytes/*immunology
[MESH]
|Influenza A Virus, H3N2 Subtype/*immunology
[MESH]