Modeling bone marrow microenvironment and hematopoietic dysregulation in Gaucher disease through VavCre mediated Gba deletion
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View abstract on PubMed
Summary
This summary is machine-generated.A new mouse model with hematopoietic-specific Gba knockout was developed to study Gaucher disease (GD). This model reveals genetic background influences GD severity and immune system alterations, aiding biomarker discovery.
Area Of Science
- Genetics
- Immunology
- Biochemistry
Background
- Gaucher disease (GD) is a lysosomal storage disorder caused by Gba mutations, leading to glucocerebrosidase deficiency and substrate accumulation.
- GD affects hematopoietic lineages, causing immune dysregulation, but existing models lack hematopoietic specificity.
- Studying hematopoietic-specific effects requires models that avoid gene deletion in non-hematopoietic cells.
Purpose Of The Study
- To create a hematopoietic-specific Gba knockout mouse model for studying Gaucher disease.
- To investigate the influence of genetic background on GD pathogenesis and immune alterations.
- To identify potential biomarkers and therapeutic targets for GD.
Main Methods
- Generated a hematopoietic-specific Gba knockout mouse model using Vav-Cre and Gbafl/fl mice.
- Backcrossed mice to 129X1/SvJ and C57BL/6J backgrounds to assess genetic influence.
- Confirmed Gba excision, measured glucocerebrosidase activity, analyzed substrate accumulation, and performed transcriptomic and immune cell deconvolution analyses.
Main Results
- The Vav-Cre Gba knockout model demonstrated efficient Gba deletion in hematopoietic cells with minimal liver recombination.
- VavCre 129 GD mice exhibited reduced glucocerebrosidase activity, increased GlcCer and GlcSph, Gaucher cell infiltration, and altered immune cell populations.
- Transcriptomic analysis revealed upregulated inflammatory and lysosomal pathways, and GPNMB was identified as a potential biomarker.
Conclusions
- The hematopoietic-specific Gba knockout model is a valuable tool for studying GD pathophysiology and immune dysregulation.
- Genetic background significantly impacts GD severity and immune landscape in this model.
- This model facilitates research into GD biomarker discovery and therapeutic strategies targeting hematopoietic and immune mechanisms.
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