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Mosaic Tetrasomy 9p Associated With Inflammatory Bowel Disease
Luis Sifuentes-Dominguez1, Petro Starokadomskyy2, Jacob Welch2
1Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Mosaic tetrasomy of chromosome 9p in an inflammatory bowel disease patient led to increased interferon activation. This finding suggests a novel pathway for intestinal inflammation driven by interferonopathies.
Area of Science:
- Genetics
- Immunology
- Gastroenterology
Background:
- The genetic underpinnings of inflammatory bowel disease (IBD) require further investigation.
- Type I interferonopathies are associated with autoinflammatory organ damage.
Observation:
- A patient with inflammatory bowel disease presented with mosaic tetrasomy of the short arm of chromosome 9 (tetrasomy 9p).
- This chromosomal region contains the type I interferon gene cluster.
Findings:
- The patient exhibited elevated interferon activation in both blood and intestinal tissues.
- This is the first reported instance of tetrasomy 9p-associated interferonopathy causing intestinal inflammation.
Implications:
- Type I interferon pathways may play a significant role in the pathogenesis of intestinal inflammation.
- This case expands the understanding of genetic factors contributing to IBD and autoinflammatory conditions.
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