Sensitivity of whole exome sequencing in detecting infantile- and late-onset Pompe disease.

Published

Journal Article

Pompe disease is a metabolic myopathy with a wide spectrum of clinical presentation. The gold-standard diagnostic test is acid alpha-glucosidase assay on skin fibroblasts, muscle or blood. Identification of two GAA pathogenic variants in-trans is confirmatory. Optimal effectiveness of enzyme replacement therapy hinges on early diagnosis, which is challenging in late-onset form of the disease due to non-specific presentation. Next-generation sequencing-based panels effectively facilitate diagnosis, but the sensitivity of whole-exome sequencing (WES) in detecting pathogenic GAA variants remains unknown. We analyzed WES data from 93 patients with confirmed Pompe disease and GAA genotypes based on PCR/Sanger sequencing. After ensuring that the common intronic variant c.-32-13T>G is not filtered out, whole-exome sequencing identified both GAA pathogenic variants in 77/93 (83%) patients. However, one variant was missed in 14/93 (15%), and both variants were missed in 2/93 (2%). One complex indel leading to a severe phenotype was incorrectly called a nonsynonymous substitution c.-32-13T>C due to misalignment. These results demonstrate that WES may fail to diagnose Pompe disease. Clinicians need to be aware of limitations of WES, and consider tests specific to Pompe disease when WES does not provide a diagnosis in patients with proximal myopathy, progressive respiratory failure or other subtle symptoms.

Full Text

Duke Authors

Cited Authors

  • Mori, M; Haskell, G; Kazi, Z; Zhu, X; DeArmey, SM; Goldstein, JL; Bali, D; Rehder, C; Cirulli, ET; Kishnani, PS

Published Date

  • December 2017

Published In

Volume / Issue

  • 122 / 4

Start / End Page

  • 189 - 197

PubMed ID

  • 29122469

Pubmed Central ID

  • 29122469

Electronic International Standard Serial Number (EISSN)

  • 1096-7206

Digital Object Identifier (DOI)

  • 10.1016/j.ymgme.2017.10.008

Language

  • eng

Conference Location

  • United States