Mutation of the Sry-related Sox10 gene in Dominant megacolon, a mouse model for human Hirschsprung disease
1998
The spontaneous mouse mutant Dominant
megacolon(Dom) is a valuable model for the study of human
congenital megacolon(Hirschsprung disease). Here we report that the defect in the Dom mouse is caused by mutation of the gene encoding the Sry-related transcription factor
Sox10. This assignment is based on (i)
colocalizationof the
Sox10gene with the Dom mutation on
chromosome 15; (ii) altered
Sox10expression in the gut and in
neural-crestderived structures of cranial ganglia of Dom mice; (iii) presence of a frameshift in the
Sox10
coding region, and (iv) functional inactivation of the resulting truncated protein. These results identify the
transcriptional regulator
Sox10as an essential factor in mouse
neural crestdevelopment and as a further candidate gene for human Hirschsprung disease, especially in cases where it is associated with features of
Waardenburg syndrome.
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