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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+Exp+Clin+Cancer+Res
2018 ; 37
(1
): 44
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Blockade of TIM3 relieves immunosuppression through reducing regulatory T cells
in head and neck cancer
#MMPMID29506555
Liu JF
; Wu L
; Yang LL
; Deng WW
; Mao L
; Wu H
; Zhang WF
; Sun ZJ
J Exp Clin Cancer Res
2018[Mar]; 37
(1
): 44
PMID29506555
show ga
BACKGROUND: T-cell immunoglobulin mucin 3 (TIM3) is a negative immune checkpoint
and plays a crucial part in tumor-induced immune suppression. However, the
mechanism of TIM3 in regulating immunosuppression in head and neck squamous cell
carcinoma (HNSCC) was still not quite clear. METHODS: We carried out the
immunohistochemistry staining of HNSCC tissue microarrays. Through quantification
of the histoscore, we performed the correlation analysis among the TIM3,
Galectin-9, Foxp3, CD68 and CD163. The effects of TIM3 on regulatory T cells
(Tregs) and macrophages were detected by utilizing the Tgfbr1/Pten 2cKO HNSCC
mouse model. Flow cytometry were used to analysis the percent of Tregs,
macrophages and IFN-?. RESULTS: We demonstrated the close association among
TIM3/Galectin-9 pathway, regulatory T cell marker (Foxp3) and macrophage marker
(CD68, CD163) in human HNSCC. In the transgenic HNSCC mouse model, blockade of
TIM3 by the anti-TIM3 monoclonal antibody induced a reduction of
CD4(+)CD25(+)Foxp3(+) Tregs. Meanwhile, the population of TIM3(+) Tregs was also
decreased. However, the population of CD206(+) macrophages was not significantly
declined. The increased IFN-? production on CD8(+) T cells in anti-TIM3 treatment
mice showed that the antitumor immune response was enhanced through suppression
of these negative immune factors. CONCLUSIONS: The present study demonstrated
that TIM3 was associated with the immunosuppression in HNSCC. And targeting TIM3
can enhance anti-tumor immune response by decreasing Tregs in HNSCC.