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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

FRAXE expansion is not a common etiological factor among developmentally delayed males.

Expansion of a (CGG)n trinucleotide repeat unit at FRAXE, a newly defined fragile site distal to FRAXA, at Xq28, is reported to be associated with mild mental retardation. Three hundred developmentally delayed male patients referred for fragile X testing but negative for the FMR-1 gene trinucleotide expansion were screened for the FRAXE expansion. This group of patients had a wide range of intellectual or behavioral problems and included 19 patients who had low-level fragile site expression detected cytogenetically at Xq27-q28. None of the patients tested positive for the FRAXE expansion. These results suggest that FRAXE is not a common etiological factor among this group of patients. The data support the hypothesis that FRAXE is either very rare or a benign fragile site that is not associated with any clinical phenotype, similar to the FRAXF and FRA16A sites.[1]

References

  1. FRAXE expansion is not a common etiological factor among developmentally delayed males. Allingham-Hawkins, D.J., Ray, P.N. Am. J. Hum. Genet. (1995) [Pubmed]
 
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