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2014 ; 40
(6
): 910-23
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gab.com Text
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English Wikipedia
Activated T cells secrete an alternatively spliced form of common ?-chain that
inhibits cytokine signaling and exacerbates inflammation
#MMPMID24909888
Hong C
; Luckey MA
; Ligons DL
; Waickman AT
; Park JY
; Kim GY
; Keller HR
; Etzensperger R
; Tai X
; Lazarevic V
; Feigenbaum L
; Catalfamo M
; Walsh ST
; Park JH
Immunity
2014[Jun]; 40
(6
): 910-23
PMID24909888
show ga
The common ?-chain (?c) plays a central role in signaling by IL-2 and other
?c-dependent cytokines. Here we report that activated T cells produce an
alternatively spliced form of ?c mRNA that results in protein expression and
secretion of the ?c extracellular domain. The soluble form of ?c (s?c) is present
in serum and directly binds to IL-2R? and IL-7R? proteins on T cells to inhibit
cytokine signaling and promote inflammation. s?c suppressed IL-7 signaling to
impair naive T cell survival during homeostasis and exacerbated
Th17-cell-mediated inflammation by inhibiting IL-2 signaling upon T cell
activation. Reciprocally, the severity of Th17-cell-mediated inflammatory
diseases was markedly diminished in mice lacking s?c. Thus, s?c expression is a
naturally occurring immunomodulator that regulates ?c cytokine signaling and
controls T cell activation and differentiation.