AUTHOR=Li Xiao-Jun , Huang Feng-Zhen , Wan Yan , Li Yu-Sang , Zhang Wei Kevin , Xi Yang , Tian Gui-Hua , Tang He-Bin 

TITLE=Lipopolysaccharide Stimulated the Migration of NIH3T3 Cells Through a Positive Feedback Between β-Catenin and COX-2

JOURNAL=Frontiers in Pharmacology

VOLUME=9

YEAR=2018

URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2018.01487

DOI=10.3389/fphar.2018.01487

ISSN=1663-9812

ABSTRACT=<p>How β-catenin/COX-2 contribute to inflammation-induced fibroblasts migration remains poorly understood. Therefore, in this study, lipopolysaccharide (LPS) was used as a stimulus to accelerate the migration of NIH3T3 cells, which mimicked the tissue repair process. LPS treatment increased the cell migration in concentration-and time-dependent manner. And NS398, a COX-2 inhibitor, inhibited LPS-induced NIH3T3 cells migration. DKK-1, an antagonist of the Wnt/β-catenin signaling, also inhibited that migration. However, TWS119, an inducer of β-catenin via GSK-3β, increased the cell migration. LPS or TWS119 treatment increased COX-2, β-catenin, <italic>TGF-β1</italic>, and <italic>HMGB-1</italic> expressions, and that could be attenuated by NS398 or DKK-1 addition. LPS induced the PGE<sub>2</sub> production, and PGE<sub>2</sub> increased the expression and nuclear translocation of β-catenin, while EP2 blocker, AH6809, alleviated those effects. TWS119 increased the luciferase activity in the COX-2 promoter. In conclusion, LPS stimulated the NIH3T3 fibroblasts migration through a positive feedback between β-catenin and COX-2, in which PGE<sub>2</sub>, EP2, <italic>TGF-β1</italic>, and <italic>HMGB-1</italic> played as signal molecules.</p>