Rett Syndrome and CDKL5 Deficiency Disorder: From Bench to Clinic
Shilpa D Kadam1,2, Brennan J Sullivan3, Archita Goyal4
1The Hugo Moser Research Institute at Kennedy Krieger, Baltimore, MD 21205, USA. kadam@kennedykrieger.org.
International Journal of Molecular Sciences
|October 18, 2019
Summary
Rett syndrome (RTT) and CDKL5 deficiency disorder (CDD) are rare X-linked brain disorders. This review compares their clinical features, underlying molecular mechanisms involving MeCP2 and CDKL5, and discusses clinical trial outcomes.
Area of Science:
- Neuroscience
- Genetics
- Developmental Biology
Background:
- Rett syndrome (RTT) and CDKL5 deficiency disorder (CDD) are rare X-linked neurodevelopmental disorders.
- Both conditions stem from mutations in genes critical for brain development and function.
- They present with overlapping yet distinct clinical manifestations, including neurological and developmental challenges.
Purpose of the Study:
- To compare the clinical phenotypes of RTT and CDD.
- To examine the impact of MeCP2 and CDKL5 loss on synaptic and circuit homeostasis, seizures, and sleep.
- To review findings from preclinical studies and recent clinical trials for both disorders.
Main Methods:
- Literature review of preclinical studies on RTT and CDD.
- Analysis of clinical data and trial outcomes for RTT and CDD.
- Comparative analysis of phenotypic features and molecular mechanisms.
Main Results:
- RTT and CDD share some clinical features but exhibit distinct patterns in neurological deficits.
- Loss of MeCP2 (in RTT) and CDKL5 (in CDD) significantly impacts synaptic plasticity and circuit function.
- Seizures and sleep disturbances are common in both disorders, with variations in severity and presentation.
Conclusions:
- Understanding the distinct and overlapping features of RTT and CDD is crucial for targeted therapeutic development.
- Preclinical findings provide insights into disease mechanisms, informing clinical trial design.
- Further research and clinical trials are needed to address the unmet needs in RTT and CDD management.
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