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International CDKL5 Disorder Database

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

The natural history of the MECP2 Duplication disorder: Australian surveillance and plans for development of an international register

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

Understanding anxiety around uncertainty

In this blog, research project co-ordinator Rebecca Kuzminski discusses anxiety related to uncertainty, why this is a particular challenge for many autistic children, and new research CliniKids is conducting to help parents support their child with managing uncertainty-related anxiety.

Maternal life events during pregnancy and offspring language ability in middle childhood

There is accumulating evidence for a link between maternal stress during pregnancy and later behavioural and emotional problems in children.

Longitudinal Rett syndrome behaviour questionnaire scores and their associations with genotype and trajectories of mobility, weight and seizure frequency status

The Rett Syndrome Behaviour Questionnaire (RSBQ) describes behavioural and emotional features. This study investigated total RSBQ score trajectories and their clustering, and for trajectory groups, relationships with genotype and mobility, weight-for-age z scores, and seizure frequency.

Exploring genotype-phenotype relationships in the CDKL5 deficiency disorder using an international dataset

Characterized by early-onset seizures, global developmental delay and severe motor deficits, CDKL5 deficiency disorder is caused by pathogenic variants in the cyclin-dependent kinase-like 5 gene. Previous efforts to investigate genotype-phenotype relationships have been limited due to small numbers of recurrent mutations and small cohort sizes. Using data from the International CDKL5 Disorder Database we examined genotype-phenotype relationships for 13 recurrent CDKL5 variants and the previously analyzed historic variant groupings. We have applied the CDKL5 Developmental Score (CDS) and an adapted version of the CDKL5 Clinical Severity Assessment (CCSA), to grade the severity of phenotype and developmental outcomes for 285 individuals with CDKL5 variants.

The incidence, prevalence and clinical features of MECP2 duplication syndrome in Australian children

MECP2 duplication syndrome is a rare but important diagnosis in children because of the burden of respiratory illness and recurrence risk

Severity Assessment in CDKL5 Deficiency Disorder

A severity assessment was rapidly developed with input from multiple stakeholders. Refinement through ongoing validation is required for future clinical trials.

Patterns of sedentary time and ambulatory physical activity in a Danish population of girls and women with Rett syndrome

High levels of sedentary time and low daily step counts in a Danish population of females with Rett syndrome

Respiratory morbidity in Rett syndrome: An observational study

Rett syndrome is associated with increased vulnerability to lower respiratory tract infection requiring hospitalization