RETRACTED ARTICLE: Membrane-Bound Mucins and Mucin Terminal Glycans Expression in Idiopathic or Helicobacter pylori, NSAID Associated Peptic Ulcers
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The ratio of Helicobacter pylori/NSAID-negative gastric ulcers is increasing. Idiopathic gastric ulcers have unique clinical and endoscopic features, and are associated with more bleeding complications and a higher mortality. Alterations in gastric mucin expression and sialylation pattern may be important in ulcer pathogenesis.
The purpose of this study was to determine the expression pattern of membrane-bound mucins and side chain sugars in H. pylori associated-, NSAID-, and idiopathic-gastric ulcers.
We randomly selected 92 patients with H. pylori (group 1, n = 30), NSAID (group 2, n = 18), combined H. pylori and NSAID associated gastric ulcers (group 3, n = 24), and patients with idiopathic gastric ulcers (group 4, n = 20). Immunohistochemistry for T-cell CD4/CD8, MUC1, MUC4, MUC17, and ECA and SNA lectins staining was performed on sections from the ulcer margins. Inflammation score was assessed according to the Sydney system.
Bleeding and mortality rates were significantly higher in group 4. CD4 positive T cell count was higher in H. pylori positive patients (P = 0.009). Staining intensity of MUC17 was higher in group 1 than in group 4, foveola and glands alike, with 11.50 ± 3.47 versus 6.80 ± 4.02, and 9.61 ± 4.26 versus 7.59 ± 3.26, respectively (P < 0.0001). This was a mirror image with MUC1. SNA lectin staining was increased in group 4, in parallel to MUC1 expression, indicating more abundant α2-6 sialylation in that group.
Cytoplasmic MUC17 staining was significantly decreased in the cases with idiopathic ulcer. The opposite was demonstrated for MUC1. This observation might be important, since different mucins with altered sialylation patterns likely differ in their protection efficiency against acid and pepsin.
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- RETRACTED ARTICLE: Membrane-Bound Mucins and Mucin Terminal Glycans Expression in Idiopathic or Helicobacter pylori, NSAID Associated Peptic Ulcers
Digestive Diseases and Sciences
Volume 57, Issue 10 , pp 2535-2544
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- Springer US
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- Idiopathic ulcer
- Helicobacter pylori
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- Author Affiliations
- 1. Department of Gastroenterology, Rabin Medical Center, Tel Aviv University, 39 Jabotinski Street, 49100, Petach Tikva, Israel
- 2. Department of Pathology, Rabin Medical Center, Hasharon Hospital, Petach Tikva, Israel
- 3. Department of Cellular and Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, San Diego, CA, USA
- 4. Department of Pathology, Rabin Medical Center, Beilinson Hospital, Petach Tikva, Israel
- 5. Department of Medicine, University of California, San Diego, CA, USA
- 6. VA San Diego Healthcare System, San Diego, CA, USA
- 7. Department of Biochemistry and Molecular Biology, University of Nebraska, Omaha, NE, USA