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International CDKL5 Clinical Research Network

RecruitingObservational study

Multi-Site Validation of Biomarkers and Core Clinical Outcome Measures for Clinical Trials Readiness in CDKL5 Deficiency Disorder

Who can join

1 Month – 100 Years · All sexes

Full eligibility criteria
Inclusion Criteria:

* All children diagnosed with CDD age 1-month to 100 years of age that are receiving care at one of the study institutions or are registered with the International CDKL5 Disorder Database will be considered for the study population.

Exclusion Criteria:

* Individuals who do not meet study inclusion criteria.

About the study

Pathogenic variants in the Cyclin-dependent kinase like 5 (CDKL5) gene cause CDKL5 deficiency disorder (CDD, MIM 300672, 105830), a severe developmental and epileptic encephalopathy associated with cognitive and motor impairments and cortical visual impairment. While capability for disease modifying therapies is accelerating, there is a critical barrier for clinical trial readiness that may result in failure of these therapies, not due to lack of efficacy but due to lack of validated outcome measures and biomarkers. The measures and biomarkers validated here will be adaptable to other developmental and epileptic encephalopathies.

What is being tested

Sponsor: University of Colorado, Denver · Participants: 1,000 · Started: Feb 15, 2021

Contact the study team

Official record on ClinicalTrials.gov — NCT05558371

Locations in the U.S.

CaliforniaUniversity of California Los Angeles/UCLA Mattel Children's Hospital, Los Angeles
ColoradoUniversity of Colorado Denver/Children's Hospital Colorado, Aurora
MassachusettsHarvard Medical School/Boston Children's Hospital, Boston
MissouriWashington University in St. Louis/St. Louis Children's Hospital, St Louis
New YorkNYU Langone Health, New York
OhioCleveland Clinic Foundation, Cleveland
PennsylvaniaChildren's Hospital of Philadelphia, Philadelphia
TexasBaylor College of Medicine/ Texas Children's Hospital, Houston

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.