Abstract:
:A rare germline duplication upstream of the bone morphogenetic protein antagonist GREM1 causes a Mendelian-dominant predisposition to colorectal cancer (CRC). The underlying disease mechanism is strong, ectopic GREM1 overexpression in the intestinal epithelium. Here, we confirm that a common GREM1 polymorphism, rs16969681, is also associated with CRC susceptibility, conferring ∼20% differential risk in the general population. We hypothesized the underlying cause to be moderate differences in GREM1 expression. We showed that rs16969681 lies in a region of active chromatin with allele- and tissue-specific enhancer activity. The CRC high-risk allele was associated with stronger gene expression, and higher Grem1 mRNA levels increased the intestinal tumor burden in Apc(Min) mice. The intestine-specific transcription factor CDX2 and Wnt effector TCF7L2 bound near rs16969681, with significantly higher affinity for the risk allele, and CDX2 overexpression in CDX2/GREM1-negative cells caused re-expression of GREM1. rs16969681 influences CRC risk through effects on Wnt-driven GREM1 expression in colorectal tumors.
journal_name
Cell Repjournal_title
Cell reportsauthors
Lewis A,Freeman-Mills L,de la Calle-Mustienes E,Giráldez-Pérez RM,Davis H,Jaeger E,Becker M,Hubner NC,Nguyen LN,Zeron-Medina J,Bond G,Stunnenberg HG,Carvajal JJ,Gomez-Skarmeta JL,Leedham S,Tomlinson Idoi
10.1016/j.celrep.2014.07.020subject
Has Abstractpub_date
2014-08-21 00:00:00pages
983-90issue
4issn
2211-1247pii
S2211-1247(14)00589-0journal_volume
8pub_type
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