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Published on: September 22, 2019
MAGI2 genetic variation and inflammatory bowel disease
Dermot P B McGovern1, Kent D Taylor, Carol Landers
1Medical Genetics Institute & Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA. mcgovernd@cshs.org
This study investigated MAGI2 gene variants in inflammatory bowel disease (IBD), finding significant associations with Crohn's disease and ulcerative colitis. These results highlight the epithelial barrier's role in IBD.
Area of Science:
- Genetics
- Gastroenterology
- Immunology
Background:
- Inflammatory bowel disease (IBD) susceptibility genes are largely unknown.
- Autoimmune conditions may share genetic loci, with links between celiac disease and IBD.
- MAGI2, a gene regulating epithelial integrity, is implicated in ulcerative colitis (UC) and celiac disease.
Purpose of the Study:
- To test MAGI2 variants for association with IBD.
- To investigate the role of MAGI2 variants in antibody production to microbial antigens.
Main Methods:
- Genotyping of 113 MAGI2 single nucleotide polymorphisms (SNPs).
- Analysis in 681 Crohn's disease (CD) cases, 259 UC cases, and 195 controls.
Main Results:
- Significant association of MAGI2 variants with IBD, particularly in intron 6 (rs2160322).
- Specific associations found with CD and UC, including a CD-associated intron 2 haplotype.
- Associations observed with antibody profiles (ASCA, anti-CBir1, anti-OmpC) in CD patients and quantitative antibody levels.
Conclusions:
- The epithelial barrier plays a crucial role in IBD pathogenesis.
- MAGI2 variants are associated with IBD and related immune responses.
- Further research into MAGI2's function in IBD is warranted.
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