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2017 ; 8
(3
): 4814-4825
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English Wikipedia
IL-17A weakens the antitumor immuity by inhibiting apoptosis of MDSCs in Lewis
lung carcinoma bearing mice
#MMPMID28002798
Wang J
; Zhang Y
; Yin K
; Xu P
; Tian J
; Ma J
; Tian X
; Wang Y
; Tang X
; Xu H
; Wang S
Oncotarget
2017[Jan]; 8
(3
): 4814-4825
PMID28002798
show ga
Myeloid-derived suppressor cells (MDSCs) weaken the antitumor immune response
through the inhibition of effector T cell activity and the production of
immunosuppressive factors in pathological sites. It is well established that
interleukin-17A (IL-17A) has a remarkable role on the promotion of inflammation
and tumor formation, and IL-17 has been implicated in the enhancement of
immunosuppression of MDSCs, which consequently promotes tumor progression. A
detailed study of this relationship remains elusive. In our study, we not only
confirmed the promotion of IL-17 on Lewis lung carcinoma (LLC) development but
also surprisingly showed that IL-17 could extend the fate and enhance the
immunosuppressive effect of MDSCs through activating ERK1/2. Additionally, the
effect of IL-17 on MDSCs was reversed, even in tumors by blocking ERK1/2.
Interdicting the signaling molecule ERK1/2 could increase the apoptosis of MDSCs
and weaken the suppressive activity of MDSCs, so that thereafter, the antitumor
immunity could be restored partly. Therefore, these findings offer new insights
into the importance of IL-17 and the downstream signaling factor ERK1/2 for
MDSCs.
|Animals
[MESH]
|Apoptosis/drug effects
[MESH]
|Carcinoma, Lewis Lung/immunology/*pathology
[MESH]