Identification of cis-regulatory variation influencing protein abundance levels in human plasma.

Abstract:

:Proteins are central to almost all cellular processes, and dysregulation of expression and function is associated with a range of disorders. A number of studies in human have recently shown that genetic factors significantly contribute gene expression variation. In contrast, very little is known about the genetic basis of variation in protein abundance in man. Here, we assayed the abundance levels of proteins in plasma from 96 elderly Europeans using a new aptamer-based proteomic technology and performed genome-wide local (cis-) regulatory association analysis to identify protein quantitative trait loci (pQTL). We detected robust cis-associations for 60 proteins at a false discovery rate of 5%. The most highly significant single nucleotide polymorphism detected was rs7021589 (false discovery rate, 2.5 × 10(-12)), mapped within the gene coding sequence of Tenascin C (TNC). Importantly, we identified evidence of cis-regulatory variation for 20 previously disease-associated genes encoding protein, including variants with strong evidence of disease association show significant association with protein abundance levels. These results demonstrate that common genetic variants contribute to the differences in protein abundance levels in human plasma. Identification of pQTLs will significantly enhance our ability to discover and comprehend the biological and functional consequences of loci identified from genome-wide association study of complex traits. This is the first large-scale genetic association study of proteins in plasma measured using a novel, highly multiplexed slow off-rate modified aptamer (SOMAmer) proteomic platform.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Lourdusamy A,Newhouse S,Lunnon K,Proitsi P,Powell J,Hodges A,Nelson SK,Stewart A,Williams S,Kloszewska I,Mecocci P,Soininen H,Tsolaki M,Vellas B,Lovestone S,AddNeuroMed Consortium.,Dobson R,Alzheimer's Disease Neuroimag

doi

10.1093/hmg/dds186

subject

Has Abstract

pub_date

2012-08-15 00:00:00

pages

3719-26

issue

16

eissn

0964-6906

issn

1460-2083

pii

dds186

journal_volume

21

pub_type

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