10.1158/0008-5472.CAN-15-2468 http://scihub22266oqcxt.onion/10.1158/0008-5472.CAN-15-2468 C4873437!4873437
!26921338
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Cancer+Res
2016 ; 76
(8
): 2265-76
Nephropedia Template TP gab.com Text Twit Text FOAVip Twit Text # English Wikipedia
Melanoma Cells Block PEDF Production in Fibroblasts to Induce the Tumor-Promoting
Phenotype of Cancer-Associated Fibroblasts
#MMPMID26921338
Nwani NG
; Deguiz ML
; Jimenez B
; Vinokour E
; Dubrovskyi O
; Ugolkov A
; Mazar AP
; Volpert OV
Cancer Res
2016[Apr]; 76
(8
): 2265-76
PMID26921338
show ga
Loss of pigment epithelium-derived factor (PEDF, SERPINF1) in cancer cells is
associated with poor prognosis and metastasis, but the contribution of stromal
PEDF to cancer evolution is poorly understood. Therefore, we investigated the
role of fibroblast-derived PEDF in melanoma progression. We demonstrate that
normal dermal fibroblasts expressing high PEDF levels attenuated melanoma growth
and angiogenesis in vivo, whereas PEDF-depleted fibroblasts exerted
tumor-promoting effects. Accordingly, mice with global PEDF knockout were more
susceptible to melanoma metastasis. We also demonstrate that normal fibroblasts
in close contact with PEDF-null melanoma cells lost PEDF expression and
tumor-suppressive properties. Further mechanistic investigations underlying the
crosstalk between tumor and stromal cells revealed that melanoma cells produced
PDGF-BB and TGF?, which blocked PEDF production in fibroblasts. Notably,
cancer-associated fibroblasts (CAF) isolated from patient-derived tumors
expressed markedly low levels of PEDF. Treatment of patient CAF and TGF?-treated
normal fibroblasts with exogenous PEDF decreased the expression of CAF markers
and restored PEDF expression. Finally, expression profiling of PEDF-depleted
fibroblasts revealed induction of IL8, SERPINB2, hyaluronan synthase-2, and other
genes associated with tumor promotion and metastasis. Collectively, our results
demonstrate that PEDF maintains tumor-suppressive functions in fibroblasts to
prevent CAF conversion and illustrate the mechanisms by which melanoma cells
silence stromal PEDF to promote malignancy. Cancer Res; 76(8); 2265-76. ©2016
AACR.
Please enable JavaScript to view the comments powered by Disqus. |*Cell Proliferation
[MESH] |Animals
[MESH] |Cell Line, Tumor
[MESH] |Eye Proteins/*biosynthesis
[MESH] |Fibroblasts/*metabolism
[MESH] |Humans
[MESH] |Melanoma/metabolism/*pathology
[MESH] |Mice
[MESH] |Mice, Inbred BALB C
[MESH] |Mice, Nude
[MESH] |Nerve Growth Factors/*biosynthesis
[MESH] |Serpins/*biosynthesis
[MESH] DeepDyve Pubget Overpricing