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Cloning, expression and functional characterization of the full-length murine ADAMTS13
K Bruno1, D Völkel, B Plaimauer
1Baxter BioScience, Vienna, Austria.
Journal of Thrombosis and Haemostasis : JTH
|May 5, 2005
Summary
Researchers cloned the murine Adamts13 gene, crucial for regulating von Willebrand factor (VWF). This work is a key step toward creating a mouse model for thrombotic thrombocytopenic purpura (TTP).
Area of Science:
- Biochemistry
- Genetics
- Hematology
Background:
- Deficiency in von Willebrand factor-cleaving protease (ADAMTS13) causes thrombotic thrombocytopenic purpura (TTP).
- Developing animal models is essential for studying TTP pathogenesis and potential treatments.
Purpose of the Study:
- To clone the complete murine Adamts13 gene.
- To characterize the functional activity of the cloned murine ADAMTS13.
- To establish a foundation for a murine model of TTP.
Main Methods:
- Cloning of the full-length murine Adamts13 gene from BALB/c mice liver mRNA.
- Transient expression of murine Adamts13 cDNA in HEK 293 cells.
- In vitro degradation assays using recombinant murine VWF (rVWF) and analysis of cleavage products.
- Inhibition assays with EDTA and TTP patient plasma.
Main Results:
- The complete murine Adamts13 gene was successfully cloned.
- Expressed murine ADAMTS13 (180 kDa) demonstrated dose-dependent degradation of rVWF into expected fragments (140 and 170 kDa).
- Murine ADAMTS13 activity was inhibited by EDTA and TTP patient plasma, confirming its functional similarity to human ADAMTS13.
Conclusions:
- The cloned murine Adamts13 gene encodes a functional VWF-cleaving protease.
- The characterized murine ADAMTS13 exhibits properties similar to its human counterpart.
- This study provides a critical component for developing a small animal model of TTP.
