The Altered Mucosal Barrier Function in the Duodenum Plays a Role in the Pathogenesis of Functional Dyspepsia

  • Keishi Komori
  • Eikichi IharaEmail author
  • Yosuke Minoda
  • Haruei Ogino
  • Taisuke Sasaki
  • Minako Fujiwara
  • Yoshinao Oda
  • Yoshihiro Ogawa
Original Article



An altered gastrointestinal barrier function is reportedly associated with the pathogenesis of functional dyspepsia (FD); however, the pathogenesis of FD has not yet been fully elucidated.


The objective of the present study was to determine whether the mucosal barrier function is impaired in patients with FD and to investigate the mechanisms underlying FD.


The present study included patients with FD (FD group, n = 24), non-FD patients with abdominal symptoms (symptomatic control group, n = 14), and patients with no abdominal symptoms (asymptomatic control group, n = 20). The groups were compared regarding the mucosal electrical impedance (MI) values of the stomach and duodenum, which were measured using a tissue conductance meter during esophagogastroduodenoscopy.


There were no significant differences between the three groups in the MI of the stomach. In contrast, the duodenal MI of the FD group (17.8 ± 4.3 Ω) was significantly lower than those of the symptomatic control group (27.2 ± 6.4 Ω, p < 0.0001) and asymptomatic control group (23.0 ± 7.4 Ω, p = 0.016). The expression of zonula occludens-1 (ZO-1) was significantly lower in the FD group than in the symptomatic control group (p = 0.011), where ZO-1 was positively correlated with the duodenal MI (β = 0.513, p = 0.017). The interleukin (IL)-1β expression was significantly higher in the FD group than in the symptomatic control group (p = 0.041), where IL-1β was inversely correlated with the duodenal MI (β = − 0.600, p = 0.004).


The mucosal barrier function of the duodenum was altered in patients with FD. Both a decreased ZO-1 and increased IL-1β may play a role in the pathogenesis of FD.


Functional dyspepsia Tight junction Mucosal barrier function Impedance IL-1β ZO-1 



We appreciate the technical assistance we received from the Research Support Center, Research Center for Human Disease Modeling, Kyushu University Graduate School of Medical Sciences. We thank Kelly Zammit, BVSc, from Edanz Editing (, for editing a draft of this manuscript.

Author’s contribution

KK and HO proposed the study. KK, EI, and YM performed the research. KK and YM collected and analyzed the data. TS, MF, and YO performed the histological diagnosis. KK and EI wrote the manuscript. YO supervised the study. All authors contributed to the interpretation of the study.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10620_2019_5470_MOESM1_ESM.jpg (174 kb)
Supplemental Figure 1. Correlation between the esophageal mucosal electrical impedance (MI) measured using the 24-h multichannel intraluminal pH/impedance test (MII-pH) versus the tissue conductance meter. The esophageal MI was measured in 14 patients (from either the functional dyspepsia group or the symptomatic control group) using both the MII-pH and the tissue conductance meter. The correlation between the MI values obtained using the different devices was calculated by performing Pearson’s correlation analysis. (JPEG 173 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Keishi Komori
    • 1
  • Eikichi Ihara
    • 1
    Email author
  • Yosuke Minoda
    • 1
  • Haruei Ogino
    • 1
  • Taisuke Sasaki
    • 2
  • Minako Fujiwara
    • 2
  • Yoshinao Oda
    • 2
  • Yoshihiro Ogawa
    • 1
  1. 1.Department of Medicine and Bioregulatory Science, Graduate School of Medical SciencesKyushu UniversityFukuokaJapan
  2. 2.Department of Anatomic Pathology, Graduate School of Medical SciencesKyushu UniversityFukuokaJapan

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