Germline allele-specific expression of TGFBR1 confers an increased risk of colorectal cancer.
Germline allele-specific expression of TGFBR1 confers an increased risk of colorectal cancer.
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DOI:
10.1126/science.1159397
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发表时间:
2008-09-05
期刊:
影响因子:
--
通讯作者:
de la Chapelle A
中科院分区:
文献类型:
--
作者:
Valle L;Serena-Acedo T;Liyanarachchi S;Hampel H;Comeras I;Li Z;Zeng Q;Zhang HT;Pennison MJ;Sadim M;Pasche B;Tanner SM;de la Chapelle A
Much of the genetic predisposition to colorectal cancer (CRC) in humans is unexplained. Studying a Caucasian-dominated population in the United States, we showed that germline allele-specific expression (ASE) of the gene encoding transforming growth factor–β (TGF-β) type I receptor, TGFBR1, is a quantitative trait that occurs in 10 to 20% of CRC patients and 1 to 3% of controls. ASE results in reduced expression of the gene, is dominantly inherited, segregates in families, and occurs in sporadic CRC cases. Although subtle, the reduction in constitutive TGFBR1 expression alters SMAD-mediated TGF-β signaling. Two major TGFBR1 haplotypes are predominant among ASE cases, which suggests ancestral mutations, but causative germline changes have not been identified. Conservative estimates suggest that ASE confers a substantially increased risk of CRC (odds ratio, 8.7; 95% confidence interval, 2.6 to 29.1), but these estimates require confirmation and will probably show ethnic differences.
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DOI:
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