The genetics of non-monogenic IBD

被引:19
作者
Jans, Deborah [1 ]
Cleynen, Isabelle [1 ]
机构
[1] Katholieke Univ Leuven, Dept Human Genet, Lab Complex Genet, Herestr 49, box610, B-3000 Louvain, Belgium
关键词
INFLAMMATORY-BOWEL-DISEASE; GENOME-WIDE ASSOCIATION; ULCERATIVE-COLITIS PATIENTS; CROHNS-DISEASE; SUSCEPTIBILITY LOCI; HLA DRB1-ASTERISK-0103; AFRICAN-AMERICANS; RISK PREDICTION; COMPLEX DISEASE; CLINICAL-COURSE;
D O I
10.1007/s00439-023-02521-9
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Inflammatory bowel disease (IBD), with Crohn's disease and ulcerative colitis as main subtypes, is a prototypical multifactorial disease with both genetic and environmental factors involved. Genetically, IBD covers a wide spectrum from monogenic to polygenic forms. In polygenic disease, many genetic variants each contribute a small amount to disease risk. With the advent of genome-wide association studies (GWAS), it became possible to find these variants and corresponding genes, leading so far to the discovery of ca 240 loci associated with IBD. Together, these however explain only 20-25% of the heritability of IBD, leaving a large portion unaccounted for. This missing heritability might be hidden in common variants with even lower effect than the ones currently found through GWAS, but also in rare variants which can be found through large-scale sequencing studies or potentially in multiplex families. In this review, we will give an overview of the current knowledge about the genetics of non-monogenic IBD and how it differs from the monogenic form(s), and future perspectives. The history of IBD genetic studies from twin studies over linkage studies to GWAS, and finally large-scale sequencing studies and the revisiting of multiplex families will be discussed.
引用
收藏
页码:669 / 682
页数:14
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