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A chimeric mouse model of Gaucher disease
E Beutler1, C West, B E Torbett
1The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California 92037, USA. beutler@scripps.edu
Molecular Medicine (Cambridge, Mass.)
|October 3, 2002
Summary
A new chimeric mouse model for Gaucher disease was created using stem cell infusion. This model shows key glycolipid storage, offering a valuable tool for studying Gaucher disease treatments.
Area of Science:
- Biomedical Research
- Genetics
- Hematology
Background:
- A viable mouse model for Gaucher disease is critically needed.
- The glucocerebrosidase knockout mouse is not viable due to central nervous system and/or skin involvement.
- Type I Gaucher disease primarily affects the monocyte-macrophage system.
Purpose of the Study:
- To develop a functional mouse model for Gaucher disease.
- To investigate glycolipid storage in a viable Gaucher disease model.
Main Methods:
- Created chimeric mice by infusing hematopoietic stem cells from glucocerebrosidase knockout fetuses into irradiated mice.
- Assessed glucocerebrosidase activity in peripheral blood cells and spleen.
- Measured glucocerebroside levels in spleen and liver.
Main Results:
- Chimeric mice exhibited severe glucocerebrosidase deficiency in peripheral blood and spleen.
- Increased glucocerebroside levels were observed in the spleen and liver.
- Exogenous glucocerebroside/albumin particle infusion exacerbated storage in liver and spleen.
- Morphologically identifiable Gaucher cells were absent.
Conclusions:
- The chimeric mouse model replicates the reticuloendothelial system's glycolipid storage characteristic of Gaucher disease.
- This model is a promising tool for investigating therapeutic strategies for Gaucher disease.