Abstract
Despite the increasing global burden of neurological disorders, there is a lack of effective diagnostic and therapeutic biomarkers. Proteins are often dysregulated in disease and have a strong genetic component. Here, we carry out a protein quantitative trait locus analysis of 184 neurologically-relevant proteins, using whole genome sequencing data from two isolated population-based cohorts (N = 2893). In doing so, we elucidate the genetic landscape of the circulating proteome and its connection to neurological disorders. We detect 214 independently-associated variants for 107 proteins, the majority of which (76%) are cis-acting, including 114 variants that have not been previously identified. Using two-sample Mendelian randomisation, we identify causal associations between serum CD33 and Alzheimer's disease, GPNMB and Parkinson's disease, and MSR1 and schizophrenia, describing their clinical potential and highlighting drug repurposing opportunities.
© 2021. The Author(s).
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Alzheimer Disease / blood
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Alzheimer Disease / diagnosis
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Alzheimer Disease / genetics*
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Alzheimer Disease / pathology
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Biomarkers / blood
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Cohort Studies
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Gene Expression
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Gene Ontology
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Genetic Predisposition to Disease
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Genome, Human
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Humans
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Membrane Glycoproteins / blood
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Membrane Glycoproteins / genetics*
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Mendelian Randomization Analysis
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Molecular Sequence Annotation
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Parkinson Disease / blood
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Parkinson Disease / diagnosis
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Parkinson Disease / genetics*
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Parkinson Disease / pathology
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Proteome / genetics
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Proteome / metabolism
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Quantitative Trait Loci
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Scavenger Receptors, Class A / blood
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Scavenger Receptors, Class A / genetics*
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Schizophrenia / blood
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Schizophrenia / diagnosis
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Schizophrenia / genetics*
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Schizophrenia / pathology
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Sialic Acid Binding Ig-like Lectin 3 / blood
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Sialic Acid Binding Ig-like Lectin 3 / genetics*
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Whole Genome Sequencing
Substances
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Biomarkers
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CD33 protein, human
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GPNMB protein, human
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MSR1 protein, human
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Membrane Glycoproteins
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Proteome
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Scavenger Receptors, Class A
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Sialic Acid Binding Ig-like Lectin 3