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Pathophysiological Investigation of the Gastric Surface Mucous Gel Layer of Patients with Helicobacter pylori Infection by Using Immunoassays for Trefoil Factor Family 2 and Gastric Gland Mucous Cell-Type Mucin in Gastric Juice

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Abstract

Background

The trefoil factor family (TFF) 2 protein is produced by gastric gland mucous cells (GMCs), and the secreted TFF2 shares a mucosal barrier function with GMC-type mucin. Recently, we presented an enzyme-linked immunosorbent assay (ELISA) method for measurement of GMC-type mucin in the gastric juice.

Aims

We aimed to develop an ELISA for TFF2 and to assess pathophysiological changes in the gastric surface mucous gel layer (SMGL) of patients with Helicobacter pylori infection.

Methods

The distribution of TFF2 and GMC-type mucin in the SMGL was immunohistochemically determined. The ELISA for TFF2 was based on a polyclonal goat antibody. Recombinant TFF2 was employed to prepare the calibrators. TFF2 and GMC-type mucin in the gastric juice in healthy individuals (n = 33) and patients with gastritis (n = 37), gastric ulcer (n = 16), and duodenal ulcer (n = 10) were assayed using ELISA.

Results

TFF2 and GMC-type mucin were immunohistochemically co-localized in the gastric SMGL and GMCs. The TFF2 levels in the patients were significantly higher than those in the healthy individuals. Further, the TFF2 levels in the H. pylori-positive patients were significantly higher than those in the H. pylori-negative patients, and decreased after the eradication of the infection. GMC-type mucin levels showed a tendency similar to that of TFF2 levels.

Conclusions

The upregulation of TFF2 and GMC-type mucin secretion may reflect the response of the gastric mucosa to H. pylori-induced injuries. TFF2 and GMC-type mucin secreted into the SMGL may protect the gastric mucosa against H. pylori.

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Acknowledgments

This work was supported by a Grant-in-Aid for Scientific Research C-21931013 (to SK) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

Conflict of interest

The authors have no relationship, financial or otherwise, with any manufacturers or distributors of products evaluated in this paper.

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Authors and Affiliations

  1. Department of Laboratory Medicine, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan

    Seiko Kubota, Mitsutoshi Sugano & Kenji Kawasaki

  2. Department of Health and Medical Sciences, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan

    Seiko Kubota & Hiroyoshi Ota

  3. Department of Medicine, Molecular Clinical Pathology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba-shi, Ibaraki, 305-8575, Japan

    Kazuyoshi Yamauchi

  4. Sugiyama Clinic, 183-3 Shimadachi, Matsumoto, Nagano, 390-0852, Japan

    Atsushi Sugiyama

  5. Department of Internal Medicine, Maruko Central General Hospital, 335-5 Kamimaruko, Ueda, Nagano, 386-0493, Japan

    Kenji Matsuzawa

  6. Department of Endoscopy, Suzaka Hospital, 1332 Suzaka, Suzaka, Nagano, 382-0091, Japan

    Taiji Akamatsu

  7. Otsuka Pharmaceutical Co., Ltd., 463-10 Kagasuno, Kawauchi-cho, Tokushima-shi, Tokushima, 771-0192, Japan

    Yasukazu Ohmoto

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  1. Seiko Kubota
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  2. Kazuyoshi Yamauchi
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  9. Hiroyoshi Ota
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Correspondence to Hiroyoshi Ota.

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Kubota, S., Yamauchi, K., Sugano, M. et al. Pathophysiological Investigation of the Gastric Surface Mucous Gel Layer of Patients with Helicobacter pylori Infection by Using Immunoassays for Trefoil Factor Family 2 and Gastric Gland Mucous Cell-Type Mucin in Gastric Juice. Dig Dis Sci 56, 3498–3506 (2011). https://doi.org/10.1007/s10620-011-1724-9

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  • DOI: https://doi.org/10.1007/s10620-011-1724-9

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