Aspects of speech-language abilities are influenced by MECP2 mutation type in girls with Rett syndrome
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This study investigates relationships between methyl-CpG-binding protein 2 gene (MECP2) mutation type and speech-language abilities in girls with Rett syndrome. Cross-sectional data on 766 girls, aged 15 years and under, with genetically confirmed Rett syndrome was obtained from the Australian Rett Syndrome Database (ARSD) (n=244) and the International Rett Syndrome Phenotype Database (InterRett) (n=522). Relationships between MECP2 mutation type and age of regression in speech-language abilities, and the level of speech-language abilities before and after this regression were investigated. The females had a median age of 4.95 years in the ARSD and 5.25 years in InterRett. The majority (89%, 685/766) acquired speech-language abilities in the form of babble or words at some point in time. Of those who acquired babble or words, 85% (581/685) experienced a regression in these abilities. Those with a p.Arg133Cys mutation were the most likely to use one or more words, prior to (RRR=3.45; 95% CI 1.15-10.41) and after (RRR=5.99; 95% CI 2.00-17.92), speech-language regression. Girls with Rett syndrome vary in their use of speech and language, and in their experience of speech-language regression and these variations are partly explained by genotype.
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Atypical Presentations and Specific Genotypes Are Associated With a Delay in Diagnosis in Females With Rett SyndromeFehr, S.; Downs, Jennepher; Bebbington, A.; Leonard, H. (2010)There is often delay between onset of Rett syndrome symptoms and its diagnosis, possibly related to symptom presentation or socio-demographic factors. We hypothesized that girls with an atypical presentation or whose ...
Urbanowicz, A.; Ciccone, N.; Girdler, Sonya; Leonard, H.; Downs, Jennepher (2017)Purpose: To describe the choice-making abilities of girls and women with Rett syndrome. Method: Females with Rett syndrome registered with the Australian Rett Syndrome Database with a pathogenic MECP2 mutation were included ...
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