Article
Timing of the absence of FMR1 expression in full mutation chorionic villi.
Human genetics - 1 Jun 2002
Willemsen Rob, Bontekoe Carola J M, Severijnen Lies-Anne, Oostra Ben A
Abstract excerpt
Fragile X syndrome is caused by the expansion of the CGG repeat in the 5' untranslated region of the FMR1 gene. This expansion leads to methylation of the FMR1 promoter region thereby blocking FMR1 protein (FMRP) expression. Prenatal diagnosis can be performed on chorionic villi samples (CVS) by Southern blot analysis. Alternatively, for males, an immunohistochemical method has been introduced for CVS. In this...
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