Clinical, cytogenetic, and molecular analysis of three families with FRAXE

被引:19
作者
Barnicoat, AJ
Wang, Q
Turk, J
Green, E
Mathew, CG
Flynn, G
Buckle, V
Hirst, M
Davies, K
Bobrow, M
机构
[1] GUYS HOSP,DEPT MED & MOL GENET,LONDON SE1 9RT,ENGLAND
[2] INST CHILD HLTH,DEPT BEHAV SCI,LONDON WC1N 1EH,ENGLAND
[3] JOHN RADCLIFFE HOSP,INST MOL MED,MOL GENET GRP,OXFORD OX3 9DW,ENGLAND
[4] JOHN RADCLIFFE HOSP,INST MOL MED,MRC,HAEMATOL UNIT,OXFORD OX3 9DW,ENGLAND
关键词
FRAXE; behavioural phenotype; FRAXF;
D O I
10.1136/jmg.34.1.13
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The probe StB12.3 has been used to screen the FMR-1 gene in 42 pedigrees with a distal Xq fragile site for expansion of the CCG repeat and aberrant methylation of the FRAXA locus. Four families did not have a FRAXA mutation and were investigated further. Fluorescent in situ hybridisation (FISH) and molecular analyses showed that three of these families had an expansion at FRAXE and one at FRAXF. Detailed psychiatric, psychological, and behavioural features of three families with FRAXE identified in the study are presented. All the males who expressed FRAXE had a large methylated CCG repeat at FRAXE. All males with the mutation had some degree of mental handicap. This study illustrates the need for the FRAXE phenotype to be defined further.
引用
收藏
页码:13 / 17
页数:5
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