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Title 

Macrophage-secreted granulin supports pancreatic cancer metastasis by inducing liver fibrosis

Authors 

S R NielsenY QuarantaA LinfordP EmeagiC RainerA SantosL IrelandT SakaiYong Sam KimD EngleF CampbellD PalmerJeong Heon KoD A TuvesonE HirschA MielgoM C Schmid

Publisher 

Nature Publishing Group

Issue Date 

2016

Citation 

Nature Cell Biology, vol. 18, no. 5, pp. 549-560

Abstract 

Pancreatic ductal adenocarcinoma (PDAC) is a devastating metastatic disease for which better therapies are urgently needed. Macrophages enhance metastasis in many cancer types; however, the role of macrophages in PDAC liver metastasis remains poorly understood. Here we found that PDAC liver metastasis critically depends on the early recruitment of granulin-secreting inflammatory monocytes to the liver. Mechanistically, we demonstrate that granulin secretion by metastasis-associated macrophages (MAMs) activates resident hepatic stellate cells (hStCs) into myofibroblasts that secrete periostin, resulting in a fibrotic microenvironment that sustains metastatic tumour growth. Disruption of MAM recruitment or genetic depletion of granulin reduced hStC activation and liver metastasis. Interestingly, we found that circulating monocytes and hepatic MAMs in PDAC patients express high levels of granulin. These findings suggest that recruitment of granulin-expressing inflammatory monocytes plays a key role in PDAC metastasis and may serve as a potential therapeutic target for PDAC liver metastasis.

ISSN 

1465-7392

Link 

http://dx.doi.org/10.1038/ncb3340

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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