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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 Int+J+Biol+Sci
2017 ; 13
(6
): 804-814
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Stroma-derived Fibrinogen-like Protein 2 Activates Cancer-associated Fibroblasts
to Promote Tumor Growth in Lung Cancer
#MMPMID28656005
Zhu Y
; Zhang L
; Zha H
; Yang F
; Hu C
; Chen L
; Guo B
; Zhu B
Int J Biol Sci
2017[]; 13
(6
): 804-814
PMID28656005
show ga
Fibrinogen-like protein 2 (Fgl2), a member of the fibrinogen super family, is a
pleiotropic cytokine that impacts diverse cellular functions. Previous studies
have shown that tumor cell-derived Fgl2 promotes tumorigenesis and metastasis in
immune-deficient mice, and it also functions as an immune-suppressive modulator
in glioblastoma multiform (GMB). This study aimed to evaluate whether and how
tumor stroma-derived Fgl2 affects tumorigenesis and tumor progression. We
established the syngeneic transplantable Lewis lung carcinoma (LLC) model in
Fgl2-knock-out (Fgl2-KO) mice and we found that deficiency of host Fgl2 is
associated with reduced growth of syngeneic LLC tumors. Furthermore, we confirmed
that host Fgl2 deficiency significantly decreased the accumulation of
myeloid-derived suppressor cells (MDSCs) through down-regulation of chemokine
(C-X-C motif) ligand 12 (CXCL12) expression. More importantly, we demonstrated
that Fgl2 induced an activated and pro-tumorigenic phenotype of cancer-associated
fibroblasts (CAFs) which are the principal source of CXCL12 in the tumor
microenvironment (TME). Our results present a novel role of stroma-derived Fgl2
in CAF activation and function, suggesting that Fgl2 is an effective therapeutic
target for treating lung cancer.