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2017 ; 8
(ä): 1386
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Critical Role for Very-Long Chain Sphingolipids in Invariant Natural Killer T
Cell Development and Homeostasis
#MMPMID29163475
Saroha A
; Pewzner-Jung Y
; Ferreira NS
; Sharma P
; Jouan Y
; Kelly SL
; Feldmesser E
; Merrill AH Jr
; Trottein F
; Paget C
; Lang KS
; Futerman AH
Front Immunol
2017[]; 8
(ä): 1386
PMID29163475
show ga
The role of sphingolipids (SLs) in the immune system has come under increasing
scrutiny recently due to the emerging contributions that these important membrane
components play in regulating a variety of immunological processes. The acyl
chain length of SLs appears particularly critical in determining SL function.
Here, we show a role for very-long acyl chain SLs (VLC-SLs) in invariant natural
killer T (iNKT) cell maturation in the thymus and homeostasis in the liver.
Ceramide synthase 2-null mice, which lack VLC-SLs, were susceptible to a
hepatotropic strain of lymphocytic choriomeningitis virus, which is due to a
reduction in the number of iNKT cells. Bone marrow chimera experiments indicated
that hematopoietic-derived VLC-SLs are essential for maturation of iNKT cells in
the thymus, whereas parenchymal-derived VLC-SLs are crucial for iNKT cell
survival and maintenance in the liver. Our findings suggest a critical role for
VLC-SL in iNKT cell physiology.