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Down Syndrome

Down syndrome, also known as Trisomy 21, is one of the most common chromosome abnormalities in humans. It occurs when a child's cells end up with 47 chromosomes instead of the usual 46. Down syndrome causes intellectual disability and other physical and learning challenges.

Rett Syndrome Behaviour Questionnaire in Children and Adults With Rett Syndrome: Psychometric Characterization and Revised Factor Structure

Rett syndrome (RTT) is a severe neurodevelopmental disorder associated with multiple neurobehavioral abnormalities. The Rett Syndrome Behaviour Questionnaire (RSBQ) was developed for pediatric RTT observational studies. Because its application has expanded to adult and interventional studies, we evaluated the RSBQ's psychometric properties in six pediatric (n = 323) and five adult (n = 309) datasets.

Evaluation Tools Developed for Rett Syndrome

Rett syndrome (RTT) is a complex neurodevelopmental X-linked disorder associated with severe functional impairments and multiple comorbidities. There is wide variation in the clinical presentation, and because of its unique characteristics, several evaluation tools of clinical severity, behavior, and functional motor abilities have been proposed specifically for it.

Aspects of speech-language abilities are influenced by MECP2 mutation type in girls with Rett syndrome

This study explored relationships between speech and language abilities in girls with Rett syndrome and how they may be affected by the type of genetic mutation

Parental perspectives on the communication abilities of their daughters with Rett syndrome

We interviewed 17 parents with a daughter with Rett syndrome to gain their perspectives on how their daughter communicates and barriers.

Parental origin of mutations

We hypothesised that MECP2 mutations occur predominantly on the male derived X chromosome.

Atypical Presentations

We investigated the factors that may affect the age at diagnosis for girls and woman with Rett syndrome.

Clinical severity and X-chromosome inactivation

For this study, we examined how Rett syndrome characteristics can be affected by X-inactivation for 2 of the common types of mutation - p.R168X and p.T158M.

Large deletions of the MECP2 gene

We used multiplex ligation-dependent probe amplification to examine the MECP2 gene sequences in 149 girls and 1 boy.