Analysis of neurodegenerative disease-causing genes in dementia with Lewy bodies
- PMID: 31996268
- PMCID: PMC6990558
- DOI: 10.1186/s40478-020-0879-z
Analysis of neurodegenerative disease-causing genes in dementia with Lewy bodies
Abstract
Dementia with Lewy bodies (DLB) is a clinically heterogeneous disorder with a substantial burden on healthcare. Despite this, the genetic basis of the disorder is not well defined and its boundaries with other neurodegenerative diseases are unclear. Here, we performed whole exome sequencing of a cohort of 1118 Caucasian DLB patients, and focused on genes causative of monogenic neurodegenerative diseases. We analyzed variants in 60 genes implicated in DLB, Alzheimer's disease, Parkinson's disease, frontotemporal dementia, and atypical parkinsonian or dementia disorders, in order to determine their frequency in DLB. We focused on variants that have previously been reported as pathogenic, and also describe variants reported as pathogenic which remain of unknown clinical significance, as well as variants associated with strong risk. Rare missense variants of unknown significance were found in APP, CHCHD2, DCTN1, GRN, MAPT, NOTCH3, SQSTM1, TBK1 and TIA1. Additionally, we identified a pathogenic GRN p.Arg493* mutation, potentially adding to the diversity of phenotypes associated with this mutation. The rarity of previously reported pathogenic mutations in this cohort suggests that the genetic overlap of other neurodegenerative diseases with DLB is not substantial. Since it is now clear that genetics plays a role in DLB, these data suggest that other genetic loci play a role in this disease.
Conflict of interest statement
The authors declare that they have no competing interests.
References
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Grants and funding
- P30 AG010124/AG/NIA NIH HHS/United States
- MR/L501542/1/MRC_/Medical Research Council/United Kingdom
- R01 NS078086/NS/NINDS NIH HHS/United States
- G1100540/MRC_/Medical Research Council/United Kingdom
- G0701075/MRC_/Medical Research Council/United Kingdom
- P50 AG008702/AG/NIA NIH HHS/United States
- P50 NS053488/NS/NINDS NIH HHS/United States
- G0900652/MRC_/Medical Research Council/United Kingdom
- G0502157/MRC_/Medical Research Council/United Kingdom
- MR/P005748/1/MRC_/Medical Research Council/United Kingdom
- R01 NS060113/NS/NINDS NIH HHS/United States
- G0901254/MRC_/Medical Research Council/United Kingdom
- U01 AG006786/AG/NIA NIH HHS/United States
- U01 NS100600/NS/NINDS NIH HHS/United States
- P50 AG005131/AG/NIA NIH HHS/United States
- G-0907/PUK_/Parkinson's UK/United Kingdom
- P50 NS038370/NS/NINDS NIH HHS/United States
- P50 AG016574/AG/NIA NIH HHS/United States
- G0400074/MRC_/Medical Research Council/United Kingdom
- P50 NS072187/NS/NINDS NIH HHS/United States
- Z01 AG000951/ImNIH/Intramural NIH HHS/United States
- U19 AG062418/AG/NIA NIH HHS/United States
- MR/L016397/1/MRC_/Medical Research Council/United Kingdom
- U24 NS072026/NS/NINDS NIH HHS/United States
- UL1 TR000040/TR/NCATS NIH HHS/United States
- P30 AG019610/AG/NIA NIH HHS/United States
- MR/T04604X/1/MRC_/Medical Research Council/United Kingdom
- MR/N026004/1/MRC_/Medical Research Council/United Kingdom
- G0801418/MRC_/Medical Research Council/United Kingdom
- MR/L023784/2/MRC_/Medical Research Council/United Kingdom
- MR/L010305/1/MRC_/Medical Research Council/United Kingdom
