Expression quantitative trait loci for PI3K/AKT pathway

被引:12
作者
Ryu, Dongchan [1 ]
Lee, Chaeyoung [1 ]
机构
[1] Soongsil Univ, Dept Bioinformat & Life Sci, 369 Sangdo Ro, Seoul 06978, South Korea
基金
新加坡国家研究基金会;
关键词
collagen; expression quantitative trait locus; genome-wide association study; PI3K/AKT pathway; single nucleotide variant; HEAD-TO-HEAD; FUNCTIONAL VARIATION; COLLAGEN; CANCER; GENE; ASSOCIATION; ORGANIZATION; MUTATIONS; EVOLUTION; PALLADIN;
D O I
10.1097/MD.0000000000005817
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
A genome-wide association study (GWAS) was conducted to identify expression quantitative trait loci (eQTLs) for the genes involved in phosphatidylinositol-3-kinase/v-akt murine thymoma viral oncogene homolog (PI3K/AKT) pathway. Data on mRNA expression of 341 genes in lymphoblastoid cell lines of 373 Europeans recruited by the 1000 Genomes Project using Illumina HiSeq2000 were utilized. We used their genotypes at 5,941,815 nucleotide variants obtained by Genome Analyzer II and SOLiD. The association analysis revealed 4166 nucleotide variants associated with expression of 85 genes (P<5 x 10(-8)). A total of 73 eQTLs were identified as association signals for the expression of multiple genes. They included 9 eQTLs for both of the genes encoding collagen type I alpha 1 (COL1A1) and integrin alpha 11 (ITGA11), which synthesize a major complex of plasma membrane. They also included eQTLs for type IV collagen molecules; 13 eQTLs for both collagen type IV alpha 1 (COL4A1) and collagen type IV alpha 2 (COL4A2) and 18 eQTLs for both collagen type IV alpha 5 (COL4A5) and collagen type IV alpha 6 (COL4A6). Some genes expressed by the eQTLs might induce expression of the genes encoding type IV collagen. One eQTL (rs16871986) was located in the promoter of palladin (PALLD) gene which might synthesize collagen by activating fibroblasts through the PI3K/AKT pathway. Another eQTL (rs34845474) was located in an enhancer of cadherin related family member 3 (CDHR3) gene which can mediate cell adhesion. This study showed a profile of eQTLs for the genes involved in the PI3K/AKT pathway using a healthy population, revealing 73 eQTLs associated with expression of multiple genes. They might be candidates of common variants in predicting genetic susceptibility to cancer and in targeting cancer therapy. Further studies are required to examine their underlying mechanisms for regulating expression of the genes.
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页数:6
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