Dataset Information

Cohort Profile: The Swiss Eosinophilic Esophagitis Cohort Study (SEECS).

ABSTRACT:

Background and aims

The prospective, observational Swiss Eosinophilic Esophagitis Cohort Study (SEECS) was set up in 2015 with the following goals in mind: (1) to provide up-to-date epidemiologic data; (2) to assess the appropriateness of care; (3) to evaluate the psychosocial impact; and (4) to foster translational research projects. Data capture relies on validated instruments to assess disease activity and focuses on epidemiologic variables and biosamples (esophageal biopsies and blood specimens). An annual inclusion of 70 new patients with eosinophilic esophagitis (EoE) or proton pump inhibitor-responsive esophageal eosinophilia (PPI-REE) is intended. We herein describe the SEECS cohort profile.

Methods

The SEECS includes adult patients (age ?18 years) with EoE or PPI-REE diagnosed according to published criteria. After inclusion, the patients are typically seen once a year for a clinical and endoscopic/histologic follow-up examination. Data are captured using validated questionnaires. Biosamples from patients with gastroesophageal reflux disease (GERD) and controls with a healthy esophagus are collected as well.

Results

From January 2016 to July 2017, a total of 111 patients with EoE and 10 patients with PPI-REE were recruited. In addition, esophageal biopsies and blood samples from 11 patients with GERD and 20 controls with a healthy esophagus were collected. The mean age of the patients with EoE and those with PPI-REE was 39.6 ± 12.9 and 44.6 ± 15.6 years, respectively. A male predominance was found among both the patients with EoE (77.5%) and those with PPI-REE (70%). Concomitant allergic disorders were found in 79.3% of the patients with EoE and 90% of the patients with PPI-REE. At inclusion, the EoE patients were treated with the following therapeutic regimens: no therapy (0.9%), PPI (36%), swallowed topical corticosteroids (82.9%), elimination diets (15.3%), and esophageal dilation (19.8%).

Conclusions

The SEECS is the first national cohort study of patients with EoE or PPI-REE. The SEECS will provide up-to-date epidemiologic data and foster translational research projects.

SUBMITTER: Safroneeva E

PROVIDER: S-EPMC5988195 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature

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Publications

Cohort Profile: The Swiss Eosinophilic Esophagitis Cohort Study (SEECS).

Safroneeva Ekaterina E Saner Catherine C Rossel Jean-Benoît JB Golay Delphine D Pittet Valérie V Godat Sébastien S Diem Stefan S Aepli Patrick P Sawatzki Mikael M Borovicka Jan J Burgmann Konstantin K Juillerat Pascal P Netzer Peter P Sendensky Alexander A Hruz Petr P Girardin Marc M Biedermann Luc L Greuter Thomas T Vavricka Stephan S Michetti Pierre P Mueller Christoph C Straumann Alex A Schoepfer Alain M AM

Inflammatory intestinal diseases 20180131 3

<h4>Background and aims</h4>The prospective, observational Swiss Eosinophilic Esophagitis Cohort Study (SEECS) was set up in 2015 with the following goals in mind: (1) to provide up-to-date epidemiologic data; (2) to assess the appropriateness of care; (3) to evaluate the psychosocial impact; and (4) to foster translational research projects. Data capture relies on validated instruments to assess disease activity and focuses on epidemiologic variables and biosamples (esophageal biopsies and bloo ...[more]

PMID: 30018966

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Project description:Eosinophilic esophagitis (EoE) is a chronic, allergen-driven inflammatory disease of the esophagus characterized predominantly by eosinophilic inflammation, leading to esophageal dysfunction. Converging data have placed the esophageal epithelium at the center of disease pathogenesis. In particular, the main EoE disease susceptibility loci at 2p23 and 5p22 encode for gene products that are produced by the esophageal epithelium: the intracellular protease calpain 14 and thymic stromal lymphopoietin, respectively. Furthermore, genetic and functional data establish a primary role for impaired epithelial barrier function in disease susceptibility and pathoetiology. Additionally, the EoE transcriptome, a set of genes dysregulated in the esophagi of patients with EoE, is enriched in genes that encode for proteins involved in esophageal epithelial cell differentiation. This transcriptome has a high proportion of esophagus-specific epithelial genes that are notable for the unexpected enrichment in genes encoding for proteases and protease inhibitors, as well as in IL-1 family genes, demonstrating a previously unappreciated role for innate immunity responses in the esophagus under homeostatic conditions. Among these pathways, basal production of the serine protease inhibitor, Kazal-type 7 (SPINK7) has been demonstrated to be part of the normal differentiation program of esophageal epithelium. Profound lost expression of SPINK7 occurs in patients with EoE and is sufficient for unleashing increased proteolytic activity (including urokinase plasminogen activator), impaired barrier function, and production of large quantities of proinflammatory and proallergic cytokines, including thymic stromal lymphopoietin. Collectively, we put forth a model in which the esophagus is normally equipped as an anti-inflammatory sensing organ and that defects in this pathway, mediated by epithelial protease/protease inhibitor imbalances, unleash inflammatory responses resulting in disorders, such as EoE.

Dataset Information

Cohort Profile: The Swiss Eosinophilic Esophagitis Cohort Study (SEECS).

Background and aims

Methods

Results

Conclusions

Publications

Cohort Profile: The Swiss Eosinophilic Esophagitis Cohort Study (SEECS).

Similar Datasets

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