[Analysis of the most frequent mutations in girls with Rett syndrome].
BACKGROUND
Rett syndrome is an X-linked dominant neurodevelopmental disorder affecting 1 from 10,000 to 15,000 females worldwide. The responsible gene, encoding methyl-CpG binding protein 2 was recently identified. Methyl-CpG binding protein 2 is thought to act as a global transcriptional repressor. In the methyl-CpG binding protein 2 gene are known 5 prevalent mutations that cause Rett syndrome. Four of them are detectable by restriction analysis. In this study we present the results of the molecular study of four prevalent mutations in the gene for methyl-CpG binding protein 2 in Czech and Slovak patients with Rett syndrome.


RESULTS
22 females with Rett syndrome were investigated by methods of molecular biology. Restriction analysis and direct sequencing of PCR products revealed in methyl-CpG binding protein 2 gene 3 different mutations (T158M, R168X, R270X) in six unrelated patients with Rett syndrome. Mutation R306C, frequent in Great Britain and Sweden, was not detected in our group of patients with Rett syndrome.


CONCLUSIONS
The diagnosis of Rett syndrome and genetic counselling in affected families should go out from the close cooperation of the pediatric, neurologic, and genetic departments with the specialized laboratories dealing with the molecular biological diagnosis.
Rosipal
R
R
Klinika dĕtského a dorostového lékarství a Centrum integrované genomiky 1. LF UK, Praha. rosipal@hotmail.com
Zeman
J
J
Hadac
J
J
Misovicová
N
N
Nevsímalová
S
S
Martásek
P
P
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002868:Chromosomal Proteins, Non-Histone; D018899:CpG Islands / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D008040:Genetic Linkage; D006801:Humans; D051783:Methyl-CpG-Binding Protein 2; D009154:Mutation; D012150:Polymorphism, Restriction Fragment Length; D012097:Repressor Proteins / Q000235:genetics; D015518:Rett Syndrome / Q000235:genetics*; D014960:X Chromosome
D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins; C497392:MECP2 protein, human; D051783:Methyl-CpG-Binding Protein 2; D012097:Repressor Proteins