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Beyond the Macrophage: System-wide Cellular and Molecular Dysregulation in GBA1 Deficient Mice Recapitulates Human Non-neuronopathic, Type 1 Gaucher Disease


ABSTRACT: In non-neuronopathic type 1 Gaucher disease (GD1) mutations in GBA1 gene results in deficiency of glucocerebrosidase and the accumulation of glucocerebroside in lysosomes of mononuclear phagocytes. The metabolic defect leads to a complex phenotype involving the viscera, the bone marrow and the skeleton. However the prevailing macrophage-centric view of the disease does not explain emerging aspects of the disease such as hematological malignancies, autoimmune diathesis, ParkinsonM-bM-^@M-^Ys disease and osteoporosis poorly responsive to macrophage targeted enzyme therapy or anti-resorptive therapies. We developed a conditional KO mouse model of GD1 to delineate cells and pathways in GD1. By targeting the cells of the hematopoetic and mesenchymal cell lineages through an Mx1 promoter, we recapitulated human GD1. We show that, in addition to significant visceral and hematologic disease, GD1 mice show profound osteopenia due to a bone formation defect. Cytokine measurements, microarray analysis and cellular immunophenotyping together point to widespread dysfunction of macrophages and other immune cells together with a striking abnormality in thymic T-cell development. Our study provides the first direct evidence for the involvement of cell lineages other than mononuclear phagocytes, most notably osteoblasts and T cells, in the pathophysiology of the clinical spectrum of type 1 GD. These findings have important implications for treatment of GD1. We hypothesize that regulation of gene expression is different in Gaucher disease compared with the normal controls. This difference may even be evident in the different stages of this disease. In order to gain insight to the genes that are potentially involved in the development of Gaucher disease in its different clinical stages, exon-array is chosen for this genome-wide association studies. Mouse liver and spleen samples from normal control, GD with moderate to severe splenomegaly/hepatomegaly, together nine samples were chosen. The goal is to find out genes of which the expression may relate to the GD or the severity of GD and thus help identify genetic modifier genes that may contribute to the onset and development of Gaucher disease.

ORGANISM(S): Mus musculus

SUBMITTER: Pramod Mistry 

PROVIDER: E-GEOD-23086 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Glucocerebrosidase gene-deficient mouse recapitulates Gaucher disease displaying cellular and molecular dysregulation beyond the macrophage.

Mistry Pramod K PK   Liu Jun J   Yang Mei M   Nottoli Timothy T   McGrath James J   Jain Dhanpat D   Zhang Kate K   Keutzer Joan J   Chuang Wei-Lien WL   Mehal Wajahat Z WZ   Zhao Hongyu H   Lin Aiping A   Mane Shrikant S   Liu Xuan X   Peng Yuan Z YZ   Li Jian H JH   Agrawal Manasi M   Zhu Ling-Ling LL   Blair Harry C HC   Robinson Lisa J LJ   Iqbal Jameel J   Sun Li L   Zaidi Mone M  

Proceedings of the National Academy of Sciences of the United States of America 20101020 45


In nonneuronopathic type 1 Gaucher disease (GD1), mutations in the glucocerebrosidase gene (GBA1) gene result in glucocerebrosidase deficiency and the accumulation of its substrate, glucocerebroside (GL-1), in the lysosomes of mononuclear phagocytes. This prevailing macrophage-centric view, however, does not explain emerging aspects of the disease, including malignancy, autoimmune disease, Parkinson disease, and osteoporosis. We conditionally deleted the GBA1 gene in hematopoietic and mesenchyma  ...[more]

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