Digestive Diseases and Sciences

, Volume 53, Issue 4, pp 1013–1019

Wnt Pathway-Related Gene Expression in Inflammatory Bowel Disease

  • Joann You
  • Anthony V. Nguyen
  • C. Gregory Albers
  • Fritz Lin
  • Randall F. Holcombe
Original Paper

DOI: 10.1007/s10620-007-9973-3

Cite this article as:
You, J., Nguyen, A.V., Albers, C.G. et al. Dig Dis Sci (2008) 53: 1013. doi:10.1007/s10620-007-9973-3

Abstract

The purpose of this study was to examine the expression of Wnt pathway-related genes in patients with ulcerative colitis (UC). RNA from colonoscopic biopsies from noninflammatory bowel disease (non-IBD) subjects and UC patients were obtained and examined with a Wnt-specific microarray for the expression of Wnt pathway-related genes. Paired samples from uninflamed and inflamed areas of the colon were obtained for the UC patients. WNT2B, WNT3A, WNT5B, WNT6, WNT7A, WNT9A, and WNT11 exhibited significantly increased expression in UC compared to non-IBD patients. Frizzled 3 (FZD3) and FZD4 exhibited significantly increased expression, and FZD1 and FZD5 exhibited significantly decreased expression in UC patients. Genes with increased expression in inflamed mucosa included DKK4, DVL2, SOX17, and COL1A1. There was no difference in the expression of a panel of Wnt target genes. The expression of inducible nitric oxide synthase (INOS) was variably influenced by inflammation. Significant differences in extracellular and cell-surface components of the Wnt pathway exist in the colonic mucosa of patients with UC compared with non-IBD patients, which may influence the strength or specificity of Wnt signaling. In inflammation, inhibitory components of the Wnt pathway exhibit increased expression, but no changes in Wnt pathway target gene expression are seen. The role and complex regulation of Sox17 and iNOS in IBD warrant further investigation.

Keywords

Wnt signaling Colon cancer Inflammatory bowel disease Ulcerative colitis Microarray analysis 

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Joann You
    • 1
  • Anthony V. Nguyen
    • 1
  • C. Gregory Albers
    • 2
  • Fritz Lin
    • 3
  • Randall F. Holcombe
    • 1
    • 4
  1. 1.Division of Hematology/Oncology, The Chao Family Comprehensive Cancer CenterUniversity of California, IrvineOrangeUSA
  2. 2.Division of GastroenterologyUniversity of California, IrvineOrangeUSA
  3. 3.Department of PathologyUniversity of California, IrvineOrangeUSA
  4. 4.Division of Hematology/Oncology, Irvine Medical CenterUniversity of CaliforniaOrangeUSA

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