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A candidate model for Angelman syndrome in the mouse
B M Cattanach1, J A Barr, C V Beechey
1Mammalian Genetics Unit, Medical Research Council, Harwell, Didcot, Oxon OX11 ORD, UK.
Summary
Prader-Willi syndrome (PWS) and Angelman syndrome (AS) are imprinting disorders. This study identifies a specific chromosomal region involved in both, suggesting a new mouse model for Angelman syndrome (AS) through paternal duplication.
Area of Science:
- Genetics
- Developmental Biology
- Epigenetics
Background:
- Prader-Willi syndrome (PWS) and Angelman syndrome (AS) are human imprinting disorders commonly linked to deletions or disomy of the 15q11-13 region.
- Previous research suggested a mouse model for PWS using maternal duplication, with a potential, but regionally distinct, model for AS.
Purpose of the Study:
- To investigate the specific chromosomal region responsible for imprinting defects in PWS and AS.
- To establish a robust mouse model for Angelman syndrome (AS).
Main Methods:
- Comparative genomic analysis of human imprinting disorders.
- Generation and phenotypic analysis of mouse models with specific chromosomal duplications.
Main Results:
- Evidence confirms that a specific region within 15q11-13 is critical for imprinting in both PWS and AS.
- Mice with paternal duplication for this region exhibit characteristics consistent with Angelman syndrome (AS).
Conclusions:
- The identified chromosomal region is crucial for establishing imprinting patterns in PWS and AS.
- Paternal duplication in this region provides a strong basis for a new mouse model of Angelman syndrome (AS).