Exome sequencing of case-unaffected-parents trios reveals recessive and de novo genetic variants in sporadic ALS

Scientific Reports
Karyn Meltz SteinbergRoger Pamphlett

Abstract

The contribution of genetic variants to sporadic amyotrophic lateral sclerosis (ALS) remains largely unknown. Either recessive or de novo variants could result in an apparently sporadic occurrence of ALS. In an attempt to find such variants we sequenced the exomes of 44 ALS-unaffected-parents trios. Rare and potentially damaging compound heterozygous variants were found in 27% of ALS patients, homozygous recessive variants in 14% and coding de novo variants in 27%. In 20% of patients more than one of the above variants was present. Genes with recessive variants were enriched in nucleotide binding capacity, ATPase activity, and the dynein heavy chain. Genes with de novo variants were enriched in transcription regulation and cell cycle processes. This trio study indicates that rare private recessive variants could be a mechanism underlying some case of sporadic ALS, and that de novo mutations are also likely to play a part in the disease.

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Methods Mentioned

BETA
exome sequencing
exome
Chip

Software Mentioned

Polymutt
Condel
PLINK Table Browser
GEMINI
SIFT
DAVID
PLINK
PolyPhen
IVA

Related Concepts

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