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Kidney histologic alterations in α-Galactosidase-deficient mice
Carmen Valbuena1, João Paulo Oliveira, Fátima Carneiro
1Serviço de Anatomia Patológica, Faculdade de Medicina da Universidade do Porto e Hospital São João, Al. Hernani Monteiro, 4200-319, Porto, Portugal. valbuena@med.up.pt
Virchows Archiv : an International Journal of Pathology
|February 18, 2011
Summary
Fabry mice accumulate glycosphingolipids in kidneys but lack key lesions seen in human Fabry nephropathy, questioning their model relevance. Understanding these species differences is crucial for Fabry disease research.
Area of Science:
- Nephrology
- Genetics
- Biochemistry
Background:
- Fabry disease is an X-linked disorder caused by mutations in the alpha-galactosidase gene (GLA).
- This leads to enzyme deficiency and systemic glycosphingolipid accumulation.
- GLA knockout mice (Fabry mice) are used as a model, but their relevance for human Fabry nephropathy is uncertain due to a lack of progressive chronic kidney disease (CKD).
Purpose of the Study:
- To evaluate kidney histological alterations in Fabry mice across different ages.
- To compare Fabry mouse renal pathology with human Fabry nephropathy across CKD stages.
Main Methods:
- Histological examination of Fabry mice and wild-type mice kidneys.
- Comparison of renal pathology using a scoring system for Fabry nephropathy.
- Analysis of glycosphingolipid storage and specific lesions like glomerulosclerosis and fibrosis.
Main Results:
- Fabry mice show progressive, age-related glycosphingolipid accumulation in all renal cell types.
- Glycosphingolipid storage prevalence is similar between mice and humans, except in mesangial and proximal tubular cells.
- Fabry mice do not develop glomerulosclerosis, interstitial fibrosis, or large podocyte inclusions characteristic of human Fabry nephropathy.
Conclusions:
- Fabry mice exhibit distinct renal phenotypes compared to humans with Fabry disease.
- The absence of progressive CKD-related lesions in mice limits their utility as a complete model for human Fabry nephropathy.
- Investigating species-specific pathogenic mechanisms could offer insights into Fabry disease progression.
