Review article: Functional dyspepsia—a gastric disorder, a duodenal disorder or a combination of both?

Author:

Broeders B. W. L. C. M.12ORCID,Carbone F.12,Balsiger L. M.1,Schol J.12,Raymenants K.12ORCID,Huang I.1,Verheyden A.1,Vanuytsel T.12ORCID,Tack J.12ORCID

Affiliation:

1. Translational Research Center for Gastrointestinal Disorders University of Leuven Leuven Belgium

2. Faculty of Medicine, KU Leuven, Leuven, Department of Gastroenterology University Hospitals Leuven Leuven Belgium

Abstract

SummaryBackgroundFunctional dyspepsia (FD) is one of the most frequent conditions in gastroenterological outpatient health care. Most recent research in FD has shifted its focus to duodenal pathophysiological mechanisms, although current treatments still focus mainly the stomach.AimThe aim of the study was to provide a comprehensive overview of the pathophysiology of FD focusing on a paradigm shift from gastric towards duodenal mechanisms.MethodsWe conducted a literature search in PubMed for studies describing mechanisms that could possibly cause FD.ResultsThe pathophysiology of FD remains incompletely understood. Recent studies show that duodenal factors such as acid, bile salt exposure and eosinophil and mast cell activation correlate with symptom pattern and burden and can be associated with gastric sensorimotor dysfunction. The evolving data identify the duodenum an interesting target for new therapeutic approaches. Furthermore, the current first‐line treatment, that is proton pump inhibitors, reduces duodenal low‐grade inflammation and FD symptoms.ConclusionFuture research for the treatment of FD should focus on the inhibition of duodenal mast cell activation, eosinophilia and loss of mucosal integrity.

Publisher

Wiley

Subject

Pharmacology (medical),Gastroenterology,Hepatology

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