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PMID: 22275870 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Unraveling the regulatory mechanisms underlying tissue-dependent genetic variation of gene expression.

PLoS genetics ·Vol. 8 ·No. 1 ·2012-01-00 ·Pages e1002431

Fu J, Wolfs MG, Deelen P, Westra HJ, Fehrmann RS, Te Meerman GJ, Buurman WA, Rensen SS, Groen HJ, Weersma RK, van den Berg LH, Veldink J, Ophoff RA, Snieder H, van Heel D, Jansen RC, Hofker MH, Wijmenga C, Franke L

Abstract

It is known that genetic variants can affect gene expression, but it is not yet completely clear through what mechanisms genetic variation mediate this expression. We therefore compared the cis-effect of single nucleotide polymorphisms (SNPs) on gene expression between blood samples from 1,240 human subjects and four primary non-blood tissues (liver, subcutaneous, and visceral adipose tissue and skeletal muscle) from 85 subjects. We characterized four different mechanisms for 2,072 probes that show tissue-dependent genetic regulation between blood and non-blood tissues: on average 33.2% only showed cis-regulation in non-blood tissues; 14.5% of the eQTL probes were regulated by different, independent SNPs depending on the tissue of investigation. 47.9% showed a different effect size although they were regulated by the same SNPs. Surprisingly, we observed that 4.4% were regulated by the same SNP but with opposite allelic direction. We show here that SNPs that are located in transcriptional regulatory elements are enriched for tissue-dependent regulation, including SNPs at 3' and 5' untranslated regions (P = 1.84×10(-5) and 4.7×10(-4), respectively) and SNPs that are synonymous-coding (P = 9.9×10(-4)). SNPs that are associated with complex traits more often exert a tissue-dependent effect on gene expression (P = 2.6×10(-10)). Our study yields new insights into the genetic basis of tissue-dependent expression and suggests that complex trait associated genetic variants have even more complex regulatory effects than previously anticipated.

MeSH Terms
Adolescent Adult Aged Alleles Blood Proteins/genetics Female Gene Expression Profiling Gene Expression Regulation Genome, Human Genotype Humans Intra-Abdominal Fat/metabolism Liver/metabolism Male Middle Aged Muscle, Skeletal/metabolism Organ Specificity Polymorphism, Single Nucleotide/genetics Quantitative Trait Loci/genetics Regulatory Sequences, Nucleic Acid/genetics Subcutaneous Tissue/metabolism
Chemicals
Blood Proteins
Authors & Affiliations
19 authors, click to expand affiliations / ORCID
Fu Jingyuan
Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands. fjingyuan@gmail.com
Wolfs Marcel G M
Deelen Patrick
Westra Harm-Jan
Fehrmann Rudolf S N
Te Meerman Gerard J
Buurman Wim A
Rensen Sander S M
Groen Harry J M
Weersma Rinse K
van den Berg Leonard H
Veldink Jan
Ophoff Roel A
Snieder Harold
van Heel David
Jansen Ritsert C
Hofker Marten H
Wijmenga Cisca
Franke Lude
Conflict of Interest

The authors have declared that no competing interests exist.

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Article Info
Journal
PLoS genetics
Abbr.
PLoS Genet
ISSN
1553-7404
Published
2012-01-00
Epub
2012-00-19
Pages
e1002431
Language
English
Region
United States
NLM ID
101239074
PMCID
PMC3261927
Subset
IM
Grants
NINDS NIH HHS · R01 NS058980 · United States
Medical Research Council · G1001158 · United Kingdom
Wellcome Trust · 084743 · United Kingdom
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