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2017 ; 8
(ä): 14979
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English Wikipedia
Monocytic and granulocytic myeloid derived suppressor cells differentially
regulate spatiotemporal tumour plasticity during metastatic cascade
#MMPMID28382931
Ouzounova M
; Lee E
; Piranlioglu R
; El Andaloussi A
; Kolhe R
; Demirci MF
; Marasco D
; Asm I
; Chadli A
; Hassan KA
; Thangaraju M
; Zhou G
; Arbab AS
; Cowell JK
; Korkaya H
Nat Commun
2017[Apr]; 8
(ä): 14979
PMID28382931
show ga
It is widely accepted that dynamic and reversible tumour cell plasticity is
required for metastasis, however, in vivo steps and molecular mechanisms are
poorly elucidated. We demonstrate here that monocytic (mMDSC) and granulocytic
(gMDSC) subsets of myeloid-derived suppressor cells infiltrate in the primary
tumour and distant organs with different time kinetics and regulate
spatiotemporal tumour plasticity. Using co-culture experiments and mouse
transcriptome analyses in syngeneic mouse models, we provide evidence that
tumour-infiltrated mMDSCs facilitate tumour cell dissemination from the primary
site by inducing EMT/CSC phenotype. In contrast, pulmonary gMDSC infiltrates
support the metastatic growth by reverting EMT/CSC phenotype and promoting tumour
cell proliferation. Furthermore, lung-derived gMDSCs isolated from tumour-bearing
animals enhance metastatic growth of already disseminated tumour cells.
MDSC-induced 'metastatic gene signature' derived from murine syngeneic model
predicts poor patient survival in the majority of human solid tumours. Thus
spatiotemporal MDSC infiltration may have clinical implications in tumour
progression.