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Expression, purification, and functional testing of recombinant CYR61/CCN1
Norbert Schütze1, Karin Kunzi-Rapp, Rita Wagemanns
1Orthopaedic Department, Molecular Orthopaedics, University of Würzburg, Germany. n-schuetze.klh@mail.uni-wuerzburg.de
Protein Expression and Purification
|May 10, 2005
Summary
Human cysteine-rich protein 61 (CYR61/CCN1) stimulates blood vessel formation and cell proliferation. This recombinant protein offers a tool to study its role in bone microenvironment cells.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Biology
Background:
- Human cysteine-rich protein 61 (CYR61/CCN1) is a CCN family member involved in cell proliferation, migration, adhesion, and differentiation.
- CYR61 is expressed in osteoblasts and influences angiogenesis, with its role in the bone microenvironment being of interest.
Purpose of the Study:
- To produce recombinant CYR61 (rCYR61) fused to an Fc-domain for use as a research tool.
- To investigate the effects of rCYR61 on angiogenesis and cell proliferation in relevant cell types.
Main Methods:
- Cloning the CYR61 open reading frame into a baculovirus expression vector.
- Transfecting SF-21 insect cells for recombinant protein expression.
- Purifying rCYR61-Fc via affinity chromatography and validating its bioactivity using the chorioallantoic membrane assay.
Main Results:
- Recombinant CYR61 (rCYR61) significantly stimulated blood vessel formation in the chorioallantoic membrane assay.
- Human mesenchymal stem cells, osteoblasts, and endothelial cells exhibited markedly stimulated proliferation in response to rCYR61 treatment.
Conclusions:
- rCYR61-Fc is a functional recombinant protein that promotes angiogenesis and cell proliferation.
- This tool can be utilized to further elucidate the specific roles of CYR61 within the bone microenvironment and other cellular contexts.