Skip Navigation LinksHome > June 2014 - Volume 58 - Issue 6 > Alteration of Tight Junction Gene Expression in Celiac Disea...
Journal of Pediatric Gastroenterology & Nutrition:
doi: 10.1097/MPG.0000000000000338
Original Articles: Gastroenterology

Alteration of Tight Junction Gene Expression in Celiac Disease

Jauregi-Miguel, Amaia*; Fernandez-Jimenez, Nora*; Irastorza, Iñaki; Plaza-Izurieta, Leticia*; Vitoria, Juan Carlos; Bilbao, Jose Ramon*

Supplemental Author Material
Collapse Box

Abstract

Objective: The aim of the present study was to characterize the deregulation of epithelial tight junction genes and investigate its reversibility on removal of dietary gluten in small intestinal mucosa in celiac disease (CD).

Methods: The expression levels of 23 genes related to tight junctions were studied in biopsies from 16 patients with active CD and compared with biopsies from the same patients taken after 2 years on gluten-free diet (GFD) and with 16 non-CD controls.

Results: Nine genes showed altered expression levels in patients with active disease (CLDN2, PARD6A, ZAK, SYMPK, MYH14, and ACTB were upregulated, whereas MAGI1, TJP1, and PPP2R3A were downregulated). Alterations were reversible after 2 years on treatment, except for PPP2R3A, implicated in the negative control of cell growth and division. At the biological network level, important dysfunctions in several processes within the pathway were observed, including intestinal permeability, apicobasal polarity, and cell proliferation.

Conclusions: Our work confirms the involvement of tight junction genes related to permeability, polarity, and cell proliferation in the epithelial destruction observed in CD. Coexpression patterns of several genes support the idea of a common regulatory mechanism that seems to be altered in active CD. In general, GFD normalization confirms the reversibility of the process, except for the constitutive downregulation of PPP2R3A suggestive of a genetic implication. Further studies in proteins and cells or tissues are necessary to confirm these findings.

© 2014 by European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology,

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.

Connect With Us

 

 

Twitter

twitter.com/JPGNonline

 

Visit JPGN.org on your smartphone. Scan this code (QR reader app required) with your phone and be taken directly to the site.