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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 J+Immunol
2008 ; 181
(11
): 7660-9
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Galectin-9 increases Tim-3+ dendritic cells and CD8+ T cells and enhances
antitumor immunity via galectin-9-Tim-3 interactions
#MMPMID19017954
Nagahara K
; Arikawa T
; Oomizu S
; Kontani K
; Nobumoto A
; Tateno H
; Watanabe K
; Niki T
; Katoh S
; Miyake M
; Nagahata S
; Hirabayashi J
; Kuchroo VK
; Yamauchi A
; Hirashima M
J Immunol
2008[Dec]; 181
(11
): 7660-9
PMID19017954
show ga
A Tim-3 ligand, galectin-9 (Gal-9), modulates various functions of innate and
adaptive immune responses. In this study, we demonstrate that Gal-9 prolongs the
survival of Meth-A tumor-bearing mice in a dose- and time-dependent manner.
Although Gal-9 did not prolong the survival of tumor-bearing nude mice, transfer
of naive spleen cells restored a prolonged Gal-9-induced survival in nude mice,
indicating possible involvement of T cell-mediated immune responses in
Gal-9-mediated antitumor activity. Gal-9 administration increased the number of
IFN-gamma-producing Tim-3(+) CD8(+) T cells with enhanced granzyme B and perforin
expression, although it induced CD4(+) T cell apoptosis. It simultaneously
increased the number of Tim-3(+)CD86(+) mature dendritic cells (DCs) in vivo and
in vitro. Coculture of CD8(+) T cells with DCs from Gal-9-treated mice increased
the number of IFN-gamma producing cells and IFN-gamma production. Depletion of
Tim-3(+) DCs from DCs of Gal-9-treated tumor-bearing mice decreased the number of
IFN-gamma-producing CD8(+) T cells. Such DC activity was significantly abrogated
by Tim-3-Ig, suggesting that Gal-9 potentiates CD8(+) T cell-mediated antitumor
immunity via Gal-9-Tim-3 interactions between DCs and CD8(+) T cells.