A novel subset of B7-H3(+)CD14(+)HLA-DR(-/low) myeloid-derived suppressor cells
are associated with progression of human NSCLC
#MMPMID25949876
Zhang G
; Huang H
; Zhu Y
; Yu G
; Gao X
; Xu Y
; Liu C
; Hou J
; Zhang X
Oncoimmunology
2015[Feb]; 4
(2
): e977164
PMID25949876
show ga
Myeloid-derived suppressor cells (MDSC) potently inhibit antitumor immune
responses, and thereby promoti tumor progression and metastasis. However, the
nature of human tumor-infiltrating MDSC remains poorly characterized. Here, we
find B7-H3 is exclusively expressed on a subset of intratumoral
CD14(+)HLA-DR(-/low) MDSC but absent from adjacent normal lung tissues of
patients with non-small cell lung carcinoma (NSCLC). Cytokine analysis revealed
that B7-H3(+)CD14(+)HLA-DR(-/low) MDSC (B7-H3(+)MDSC) produced higher levels of
IL-10 and TNF? but lower levels of IL-1? and IL-6 when compared with
B7-H3(-)CD14(+)HLA-DR(-/low) myeloid-derived suppressor cells (B7-H3(-)MDSC). In
a murine lung cancer model, B7-H3(+)MDSCs were found only in the tumor
microenvironment and their frequencies increased during tumor progression.
Clinical data analysis indicated that a higher frequency of B7-H3(+)MDSCs was
associated with reduced recurrence-free survival in patients with NSCLC. Taken
together, we identify a novel subset of MDSCs within the tumor microenvironment
that fosters tumor progression.