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.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
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 Ldoi
10.1371/journal.pgen.1002431subject
Has Abstractpub_date
2012-01-01 00:00:00pages
e1002431issue
1eissn
1553-7390issn
1553-7404pii
PGENETICS-D-11-01500journal_volume
8pub_type
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