With a growing number of different pathogenic repeat expansions linked to human disease, genetic testing for this unique class of mutations is an important component of the diagnostic process for many patients. Particularly those experiencing symptoms associated with developmental delay, neuromuscular and neurodegenerative disorders.
In previous posts, we’ve talked about the role of repeat expansions in fragile X syndrome and inherited ataxias. We’ve also detailed the strategy that our proprietary algorithms use to detect these and other repeat expansions as part of our Variantyx Unity™ test. A test which is uniquely based on clinical whole genome sequencing (WGS).
Today we’re excited to share that we’ve expanded the number of pathogenic repeat expansion loci covered in this single genetic test to a total of 24!
Pathogenic repeat expansion loci screened by Variantyx Unity™
|AFF2||CCG||Fragile XE syndrome|
|AFF3||CGG||FRA2A fragile site|
|AR||CAG||Spinal and bulbar muscular atrophy|
|ATN1||CAG||Dentatorubral-pallidoluysian atrophy (DRPLA)|
|BMPR2||GGC||Pulmonary hypertension associated with congenital heart disease|
|C9ORF72||GGGGC||Frontotemporal dementia and/or amyotrophic lateral sclerosis (FTDALS1)|
|CNBP||CCTG||Myotonic dystrophy type II|
|DIP2B||CGG||FRA12A fragile site|
|DMPK||CTG||Myotonic dystrophy type I|
|FMR1||CGG||Fragile X syndrome|
|JPH3||CTG||Huntington disease-like 2 syndrome|
|NOP56||GGCCTG||Spinocerebellar ataxia 36|
Note: Data is current as of January 10, 2019. The most up-to-date list can be found in the downloadable brochures section of the clinical resources page.
The expansion is the result of ongoing refinement and calibration of our algorithms.