Related Experiment Video
Updated: May 10, 2026

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
ADCY5-Mosaic Variants: A Diagnosis Not to Be Missed
Alice Innocenti1, Emmanuel Roze2,3, Florence Riant4
1Neurology, Epilepsy and Movement Disorders Unit, Bambino Gesù Children's Hospital, IRCCS, Full Member of European Reference Network on Rare and Complex Epilepsies, EpiCARE, Rome, Italy.
ADCY5-mosaic variants can present with milder symptoms than typical ADCY5 disorders, including paroxysmal dyskinesias. Early identification is key, as mosaicism may be overlooked in genetic testing.
Area of Science:
- Neurogenetics
- Movement Disorders
Background:
- ADCY5-mosaicism is increasingly identified, often with milder phenotypes.
- Limited data exists on the detailed clinical characteristics of these patients.
Observation:
- A study analyzed 12 ADCY5-mosaic patients and 7 literature cases.
- 63% had hyperkinetic motor disorder with exacerbations; 30% had isolated paroxysmal dyskinesias (PxD).
- 70% of PxD cases initially presented in infancy.
Findings:
- Caffeine treatment showed high efficacy in affected patients.
- Developmental delay occurred in 5 patients, particularly those with persistent motor symptoms.
- ADCY5-mosaic carriers may exhibit a similar spectrum to non-mosaic carriers but with reduced severity.
Implications:
- Isolated PxD in infancy is a significant indicator for ADCY5-mosaic variants.
- Genetic analysis requires careful consideration of mosaicism, which can be easily missed.
- Recognizing milder ADCY5-mosaic phenotypes aids in diagnosis and management.
More Related Videos
05:58Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format
Published on: August 20, 2018
08:22A Robust Polymerase Chain Reaction-based Assay for Quantifying Cytosine-guanine-guanine Trinucleotide Repeats in Fragile X Mental Retardation-1 Gene
Published on: September 16, 2019
Related Concept Videos
Karyotyping
Viral Mutations
Mismatch Repair
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Point and Frameshift Mutations
Cytomegalovirus Disease
Huntington Disease l: Introduction