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CCN2 is necessary for the function of mouse embryonic fibroblasts
Laura Kennedy1, Shangxi Liu, Xu Shi-Wen
1Division of Oral Biology and Department of Physiology and Pharmacology, CIHR Group in Skeletal Development and Remodeling, Schulich School of Medicine and Dentistry, University of Western Ontario, Dental Sciences Building, London, ON, Canada N6A 5C1.
Cellular communication network factor 2 (CCN2) is crucial for fibroblast function in tissue remodeling. Loss of CCN2 in mouse embryonic fibroblasts (MEFs) impairs cell adhesion, inflammation, and migration, partly due to reduced syndecan 4 expression.
Area of Science:
- Cell Biology
- Developmental Biology
- Biochemistry
Background:
- CCN2 is involved in tissue remodeling and overexpressed in fibrosis and cancer.
- The precise physiological roles and mechanisms of CCN2 action remain largely unknown.
Purpose of the Study:
- To investigate the contribution of CCN2 to mouse embryonic fibroblast (MEF) biology.
- To elucidate the molecular mechanisms underlying CCN2 function in MEFs.
Main Methods:
- Genome-wide mRNA expression profiling of CCN2-deficient MEFs.
- Proteomic and functional bioassay analyses.
- Investigating gene expression, protein phosphorylation, and cell migration.
Main Results:
- CCN2 deficiency in MEFs significantly reduced pro-adhesive, pro-inflammatory, and pro-angiogenic genes, including syndecan 4.
- Syndecan 4 acts downstream of CCN2, mediating cell migration and ERK phosphorylation.
- CCN2-deficient MEFs exhibited reduced focal adhesions, actin stress fibers, and force transduction.
Conclusions:
- CCN2 is essential for fibroblast participation in tissue remodeling, embryogenesis, and repair.
- Reduced syndecan 4 expression is a key factor in the CCN2-deficient MEF phenotype.
- CCN2 plays vital roles in wound healing, tissue repair, and fibrogenesis.
