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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Eur+J+Immunol
2015 ; 45
(11
): 3045-51
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Syndecan-1 identifies and controls the frequency of IL-17-producing naïve natural
killer T (NKT17) cells in mice
#MMPMID26300525
Dai H
; Rahman A
; Saxena A
; Jaiswal AK
; Mohamood A
; Ramirez L
; Noel S
; Rabb H
; Jie C
; Hamad AR
Eur J Immunol
2015[Nov]; 45
(11
): 3045-51
PMID26300525
show ga
Invariant natural killer T (iNKT) cells recognize glycolipids as antigens and
diversify into NKT1 (IFN-?), NKT2 (IL-4), and NKT17 (IL-17) functional subsets
while developing in the thymus. Mechanisms that govern the balance between these
functional subsets are poorly understood due, partly, to the lack of
distinguishing surface markers. Here we identify the heparan sulfate proteoglycan
syndecan-1 (sdc1) as a specific marker of naïve thymic NKT17 cells in mice and
show that sdc1 deficiency significantly increases thymic NKT17 cells at the
expense of NKT1 cells, leading to impaired iNKT cell-derived IFN-?, both in vitro
and in vivo. Using surface expression of sdc1 to identify NKT17 cells, we confirm
differential tissue localization and interstrain variability of NKT17 cells, and
reveal that NKT17 cells express high levels of TCR-?, preferentially use V?8, and
are more highly sensitive to ?-GalCer than to CD3/CD28 stimulation. These
findings provide a novel, noninvasive, simple method for identification, and
viable sorting of naïve NKT17 cells from unmanipulated mice, and suggest that
sdc1 expression negatively regulates homeostasis in iNKT cells. In addition,
these findings lay the groundwork for investigating the mechanisms by which sdc1
regulates NKT17 cells.