AGG interruptions within the maternal FMR1 gene reduce the risk of offspring with fragile X syndrome
Author(s) -
Carolyn M. Yrigollen,
Blythe DurbinJohnson,
Louise W. Gane,
David L. Nelson,
Randi Hagerman,
Paul J. Hagerman,
Flora Tassone
Publication year - 2012
Publication title -
genetics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.509
H-Index - 128
eISSN - 1530-0366
pISSN - 1098-3600
DOI - 10.1038/gim.2012.34
Subject(s) - fmr1 , fragile x syndrome , allele , genetics , haplotype , offspring , locus (genetics) , biology , trinucleotide repeat expansion , microsatellite , gene , pregnancy
The ability to accurately predict the likelihood of expansion of the CGG repeats in the FMR1 gene to a full mutation is of critical importance for genetic counseling of women who are carriers of premutation alleles (55-200 CGG repeats) and who are weighing the risk of having a child with fragile X syndrome. The presence of AGG interruptions within the CGG repeat tract is thought to decrease the likelihood of expansion to a full mutation during transmission, thereby reducing risk, although their contribution has not been quantified.
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