Glucocerebrosidase gene-deficient mouse recapitulates Gaucher disease displaying cellular and molecular dysregulation beyond the macrophage.
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 mesenchymal cell lineages using an Mx1 promoter. Although this mouse fully recapitulated human GD1, cytokine measurements, microarray analysis, and cellular immunophenotyping together revealed widespread dysfunction not only of macrophages, but also of thymic T cells, dendritic cells, and osteoblasts. The severe osteoporosis was caused by a defect in osteoblastic bone formation arising from an inhibitory effect of the accumulated lipids LysoGL-1 and GL-1 on protein kinase C. This study provides direct evidence for the involvement in GD1 of multiple cell lineages, suggesting that cells other than macrophages may be worthwhile therapeutic targets.
Department of Pediatrics, Yale School of Medicine, New Haven, CT 06562, USA. pramod.mistry@yale.edu
Pramod K
PK
Mistry
Jun
J
Liu
Mei
M
Yang
Timothy
T
Nottoli
James
J
McGrath
Dhanpat
D
Jain
Kate
K
Zhang
Joan
J
Keutzer
Wei-Lien
WL
Chuang
Wei-Lein
WL
Chuang
Wajahat Z
WZ
Mehal
Hongyu
H
Zhao
Aiping
A
Lin
Shrikant
S
Mane
Xuan
X
Liu
Yuan Z
YZ
Peng
Jian H
JH
Li
Manasi
M
Agrawal
Ling-Ling
LL
Zhu
Harry C
HC
Blair
Lisa J
LJ
Robinson
Jameel
J
Iqbal
Li
L
Sun
Mone
M
Zaidi
D000818:Animals; D005776:Gaucher Disease / Q000235:genetics / Q000473:pathology*; D017353:Gene Deletion; D005962:Glucosylceramidase / Q000172:deficiency* / Q000235:genetics; D006412:Hematopoietic Stem Cells / Q000166:cytology; D006801:Humans; D008264:Macrophages / Q000473:pathology*; D059630:Mesenchymal Stem Cells / Q000166:cytology; D051379:Mice; D010024:Osteoporosis / Q000209:etiology; D010641:Phenotype; D011401:Promoter Regions, Genetic
D005962:Glucosylceramidase