Better Delineation of CDK13 Related Phenotype and Epigenetic Signature.

Congenital Heart Defects Clinical Trial

— CDK13  

Official title:

CDK13 Related Disorder : Clinical Phenotype, Neuropsychological Profile, Brain MRI Characteristics and Epigenetic Signature.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT04382573
• Other study ID #: RECHMPL20_0279
• Status: Recruiting
• Start date: November 1, 2019
• Est. completion date: December 30, 2020

Study information

• Verified date: May 2020
• Source: University Hospital, Montpellier
• Contact: David GENEVIEVE, MH PD
• Phone: 04 67 33 61 04
• Email: d-genevieve[@]chu-montpellier.fr
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

CDK13 related disorder is mainly characterised by developmental delay (DD) and intellectual disability (ID), ranging from mild to severe, and malformation syndrome.

The aims of this study are first to better delineate the clinical phenotype, as well as the neuropsychological profile, and the brain MRI characteristics; and, second, to study the epigenetic signatures in a cohort of individuals with CDK13 intragenic pathogenic variants. This work will conduct to a MD thesis of a clinical resident geneticist in France.

Physician that will participate will fill an Excel sheet regarding the clinical and neuropsychological assessment.

The investigators will be also happy to have either CD-ROM or a link to have access to the brain MRI data as well as a DNA sample with a minimum 0.5ug of peripheral blood genomic DNA. The investigators will gather the DNA in Montpellier genetic lab (Dr Mouna BARAT) and send the batch to the Dr Sadikovic' lab.

Between 2019 and 2020, The investigators have already recruited data from individuals with CDK13 pathogenic variants from France and several European genetic centres.

Description:

The investigators aim to better understand and delineate the genetic syndrome CDK13 This genetic disorder was described in Sepember 2016 in Nature Genetics (PMID 27479907).

Since this first publication of 6 individuals carrying the pathogenic mutation CDK13, 37 other individuals carrying a pathogenic mutation of CDK13 have been reported in the litterature The investigators are seeking to better define the phenotype of individuals with pathogenic variants of CDK13, to better understand intellectual functioning as well as the strengths and weaknesses of intellectual functioning by collecting standardized neuropsychological assessments already performed such as WPPSI/WISC and WAIS. For this purpose, The investigators will gather clinical and neuropsychological data already carried out in the context of care.

The investigators also aim to gather the cerebral MRI scans already performed in order to better delimit the cerebral anomalies observed in individuals and if the sequence is adapted, The investigators will perform VBM studies.

Finally, The investigators will attempt to identify an epigenetic signature in this genetic disease. To this end, The investigators will collect genomic DNA from peripheral blood already collected for genetic analysis and send an anonymized batch of samples to our collaborator, Dr. Bekim Sadicovik. Dr. Bekim Sadicovik and his team will compare the epigenetic DNA methylation-type markers with the corresponding sex and age controls. If specific probes are abnormally methylated in CDK13 individuals, this will determine a disease-specific epigenetic signature. The investigators will then be able to propose an epigenetic signature for individuals with uncharacterized CDK13 variations (class 3, VUS). This method will make it possible to define whether the variation is responsible for the disease or not without going through functional analysis steps that are difficult to implement routinely.

The expected benefits are a better understanding of CDK13 disease, keys to neuropsychological rehabilitation, a better understanding of human brain functions, the possibility of proposing an epigenetic signature for people in whom it is not possible to decide whether a variation in the CDK13 gene is pathological or not

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 100
• Est. completion date: December 30, 2020
• Est. primary completion date: December 1, 2020
• Accepts healthy volunteers: No
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion criteria:

• CDK13 intragenic pathogenic SNV (Single Nucleotide Variant)

Exclusion criteria:

• no pathogenic SNV in CDK13

• no consent for the study

Related Conditions & MeSH terms

• Congenital Heart Defects
• Developmental Disabilities
• Dysmorphic Facial Features and Intellectual Developmental Disorder
• Heart Defects, Congenital
• Intellectual Disability

Intervention

Genetic:
• Epigenetic signatures
Epigenetic signatures (Dr Sadikovic' lab, London, Ontario, Canada)

Locations

Country	Name	City	State
France	UH Montpellier	Montpellier

Sponsors (1)

Lead Sponsor	Collaborator
University Hospital, Montpellier

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Evolution of clinical data	Clinical data such as growth parameters, facial, neurological, ENT, eye, cardiac, etc.. features	1 day
Primary	Neuropsychological test	Neuropsychological test with total IQ and subscore data using WISC or WAIS test	1 day
Secondary	Evolution of genetic data	Evolution of genetic data : Epigenetic signatures	1 day