members of the cyr61/ctgf/nov protein family: emerging players in hepatic progenitor cell activation and intrahepatic cholangiocarcinoma
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ID: 218625
2016
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Abstract
Hepatic stem/progenitor cells (HPC) reside quiescently in normal biliary trees and are activated in the form of ductular reactions during severe liver damage when the replicative ability of hepatocytes is inhibited. HPC niches are full of profibrotic stimuli favoring scarring and hepatocarcinogenesis. The Cyr61/CTGF/NOV (CCN) protein family consists of six members, CCN1/CYR61, CCN2/CTGF, CCN3/NOV, CCN4/WISP1, CCN5/WISP2, and CCN6/WISP3, which function as extracellular signaling modulators to mediate cell-matrix interaction during angiogenesis, wound healing, fibrosis, and tumorigenesis. This study investigated expression patterns of CCN proteins in HPC and cholangiocarcinoma (CCA). Mouse HPC were induced by the biliary toxin 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC). Differential expression patterns of CCN proteins were found in HPC from DDC damaged mice and in human CCA tumors. In addition, we utilized reporter mice that carried Ccn2/Ctgf promoter driven GFP and detected strong Ccn2/Ctgf expression in epithelial cell adhesion molecule (EpCAM)+ HPC under normal conditions and in DDC-induced liver damage. Abundant CCN2/CTGF protein was also found in cytokeratin 19 (CK19)+ human HPC that were surrounded by α-smooth muscle actin (α-SMA)+ myofibroblast cells in intrahepatic CCA tumors. These results suggest that CCN proteins, particularly CCN2/CTGF, function in HPC activation and CCA development.
| Reference Key |
wu2016gastroenterologymembers
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|---|---|
| Authors | ;Qunfeng Wu;Marda Jorgensen;Joanna Song;Junmei Zhou;Chen Liu;Liya Pi |
| Journal | colloids and surfaces a: physicochemical and engineering aspects |
| Year | 2016 |
| DOI |
10.1155/2016/2313850
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| URL | |
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