Expanding the clinical picture of the MECP2 Duplication syndrome
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Individuals with two or more copies of the MECP2 gene, located at Xq28, share clinical features and a distinct facial phenotype known as MECP2 Duplication syndrome. We have examined perinatal characteristics, early childhood development and medical co-morbidities in this disorder. The International Rett Syndrome Phenotype Database (InterRett), which collects information from caregivers and clinicians on individuals with Rett syndrome and MECP2 associated disorders, was used as the data source. Data were available on 56 cases (49 males and 7 females) with MECP2 Duplication syndrome. Median age at ascertainment was 7.9years (range: 1.2-37.6years) and at diagnosis 3.0years (range: 3weeks-37years). Less than a third (29%) learned to walk. Speech deterioration was reported in 34% and only 20% used word approximations or better at ascertainment. Over half (55%) had been hospitalised for respiratory infections in the first 2years of life. Just under half (44%) had seizures, occurring daily in nearly half of this group. The majority (89%) had gastrointestinal problems and a third had a gastrostomy. Following the recent demonstration of phenotype reversal in a mouse model of MECP2 Duplication, a clear understanding of the natural history is crucial to the design and implementation of future therapeutic strategies.
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Leonard, H.; Downs, Jennepher; Lim, Z.; Wong, K.; Murphy, N.; Epstein, A.; Ellaway, C. (2015)Background: Individuals who have two or more copies of the MECP2 gene, located at Xq28, have been found to share clinical features and a distinct facial phenotype known as MECP2 duplication syndrome (MDS). The aims of ...
Downs, J.; Bebbington, A.; Jacoby, P.; Williams, A.; Ghosh, Soumya; Kaufmann, W.; Leonard, H. (2010)Aim - We investigated relationships between hand function and genotype and aspects of phenotype in Rett syndrome. Method - Video assessment in naturalistic settings was supplemented by parent-reported data in a cross-sectional ...
Aspects of speech-language abilities are influenced by MECP2 mutation type in girls with Rett syndromeUrbanowicz, A.; Downs, Jennepher; Girdler, S.; Ciccone, N.; Leonard, H. (2015)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, ...