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Fragilitas ossium: a new autosomal recessive mutation in the mouse
The Journal of Heredity
|November 1, 1981
Abstract:
Fragilitas ossium, fro, is an often lethal recessive mutation that was discovered in a randombred stock of mice after treatment with the chemical mutagen tris(1-aziridinyl) phosphine-sulphine. The fro/fro mice have osteoporosis-bending and fracture of the long bones-that is associated with apparently normal cartilage growth. The roentgenological and pathological features are similar to those of the severe, often lethal recessive form of human osteogenesis imperfecta.
Insights
Fragilitas ossium (fro) is a lethal mutation in mice causing bone fractures and osteoporosis. This mouse model shares similarities with severe human osteogenesis imperfecta.
Area of Science:
- Genetics
- Developmental Biology
- Orthopedics
Background:
- Fragilitas ossium (fro) is a lethal, recessive mutation identified in mice.
- The mutation arose spontaneously in a random-bred mouse stock following chemical mutagen treatment.
Purpose of the Study:
- To characterize the genetic and phenotypic aspects of the fragilitas ossium (fro) mutation in mice.
- To investigate the potential of the fro mouse model for studying human osteogenesis imperfecta.
Main Methods:
- Induction of mutation using a chemical mutagen (tris(1-aziridinyl) phosphine-sulphine).
- Phenotypic analysis of fro/fro mice, including skeletal evaluation.
- Comparison of roentgenological and pathological features with human osteogenesis imperfecta.
Main Results:
- fro/fro mice exhibit severe osteoporosis, characterized by bone bending and fractures.
- Cartilage growth appears normal in affected mice.
- Skeletal abnormalities in fro/fro mice closely resemble those seen in severe human osteogenesis imperfecta.
Conclusions:
- The fragilitas ossium (fro) mutation in mice provides a valuable model for studying severe, lethal forms of osteogenesis imperfecta.
- This model can aid in understanding the pathogenesis of brittle bone diseases and developing therapeutic strategies.