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Updated: Jul 13, 2025
Preparation of Mouse Embryonic Fibroblast Cells Suitable for Culturing Human Embryonic and Induced Pluripotent Stem Cells
Published on: June 21, 2012
Proteomic and phosphoproteomic characterisation of primary mouse embryonic fibroblasts
Yanfang Chen1, Severine Roselli1, Nikita Panicker2
1School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, Hunter Medical Research Institute, University of Newcastle; and Precision Medicine Program, Callaghan, New South Wales, Australia.
Abstract:
Fibroblasts are the most common cell type in stroma and function in the support and repair of most tissues. Mouse embryonic fibroblasts (MEFs) are amenable to isolation and rapid growth in culture. MEFs are therefore widely used as a standard model for functional characterisation of gene knockouts, and can also be used in co-cultures, commonly to support embryonic stem cell cultures. To facilitate their use as a research tool, we have performed a comprehensive proteomic and phosphoproteomic characterisation of wild-type primary MEFs from C57BL/6 mice. EIF2/4 and MTOR signalling pathways were abundant in both the proteome and phosphoproteome, along with extracellular matrix (ECM) and cytoskeleton associated pathways. Consistent with this, kinase enrichment analysis identified activation of P38A, P90RSK, P70S6K, and MTOR. Cell surface markers and matrisome proteins were also annotated. Data are available via ProteomeXchange with identifier PXD043244. This provides a comprehensive catalogue of the wild-type MEF proteome and phosphoproteome which can be utilised by the field to guide future work.
Insights
Mouse embryonic fibroblasts (MEFs) proteome and phosphoproteome were characterized, revealing key signaling pathways like EIF2/4 and MTOR. This comprehensive data catalog aids future research using MEFs as a standard model.
Area of Science:
- Proteomics and Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Fibroblasts, particularly Mouse Embryonic Fibroblasts (MEFs), are crucial stromal cells for tissue support and repair.
- MEFs are widely utilized in research for gene knockout studies and co-culture applications, especially for supporting embryonic stem cells.
Purpose of the Study:
- To conduct a comprehensive proteomic and phosphoproteomic characterization of wild-type primary MEFs.
- To establish a detailed molecular catalog of MEFs to facilitate their use as a research tool.
Main Methods:
- Proteomic and phosphoproteomic analysis of wild-type primary MEFs from C57BL/6 mice.
- Bioinformatic analysis including pathway enrichment and kinase activity identification.
Main Results:
- Identified abundant EIF2/4 and MTOR signaling pathways in both proteome and phosphoproteome.
- Detected enrichment of extracellular matrix (ECM) and cytoskeleton-associated pathways.
- Kinase enrichment analysis revealed activation of P38A, P90RSK, P70S6K, and MTOR.
Conclusions:
- The study provides a comprehensive proteomic and phosphoproteomic catalog of wild-type MEFs.
- This resource can guide future research utilizing MEFs for functional characterization and other applications.
- Annotated cell surface markers and matrisome proteins offer further insights into MEF biology.
