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Variant clinical course of mucopolysaccharidosis type VII in two groups of mice carrying the same mutation
1Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104, USA.
Abstract:
Mucopolysaccharidosis type VII (MPS VII) is a lysosomal storage disease caused by a deficiency in beta-glucuronidase. The disease has been well-characterized in B6.C-H-2bml/ByBir-gus(mps/mps) mice, which have proven to be an excellent model for the study of treatment modalities of storage diseases. However, because of the progressive nature of the disease, the mice deteriorate rapidly, have a greatly decreased life span, and are infertile. To increase fitness, B6.C-H-2bml/ByBir-gus(mps/+) were interbred with normal C3H mice. This study compares clinical findings, fertility, longevity, and gross and microscopic findings in the original strain with those in the F2 generation of the interbred strain.
Insights
This study improved the fitness of Mucopolysaccharidosis type VII (MPS VII) mouse models by interbreeding. The F2 generation exhibited enhanced fertility and longevity compared to the original strain, aiding storage disease research.
Area of Science:
- Genetics and genomics
- Lysosomal storage diseases
- Animal models for disease research
Background:
- Mucopolysaccharidosis type VII (MPS VII) is a genetic disorder resulting from beta-glucuronidase deficiency.
- The B6.C-H-2bml/ByBir-gus(mps/mps) mouse strain is a valuable model for MPS VII, but suffers from rapid deterioration, reduced lifespan, and infertility.
- These limitations hinder long-term studies of treatment modalities for lysosomal storage diseases.
Purpose of the Study:
- To enhance the fitness of the MPS VII mouse model for improved research utility.
- To compare clinical, fertility, longevity, and pathological characteristics between the original MPS VII mouse strain and an F2 interbred generation.
Main Methods:
- Interbreeding of B6.C-H-2bml/ByBir-gus(mps/+) mice with normal C3H mice to create an F2 generation.
- Comparative analysis of clinical findings, fertility rates, lifespan, and gross/microscopic pathology between the original and F2 strains.
Main Results:
- The F2 generation demonstrated increased fertility and longevity compared to the original MPS VII mouse model.
- Comparative pathological assessments were conducted to evaluate disease progression and severity in both strains.
Conclusions:
- Interbreeding offers a viable strategy to improve the fitness of the MPS VII mouse model.
- The enhanced F2 generation provides a more robust platform for investigating therapeutic interventions for MPS VII and other lysosomal storage diseases.