Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies

A large number of studies link H. pylori infection with a reduced risk of developing extra-gastric conditions such as allergy, asthma, inflammatory bowel disease, coeliac disease and multiple sclerosis. The strength of the evidence for these protective associations is quite variable, and published s...

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Main Author: Karen Robinson
Format: Article
Language:English
Published: MDPI AG 2015-03-01
Series:Diseases
Subjects:
Online Access:http://www.mdpi.com/2079-9721/3/2/34
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author Karen Robinson
author_facet Karen Robinson
author_sort Karen Robinson
collection DOAJ
description A large number of studies link H. pylori infection with a reduced risk of developing extra-gastric conditions such as allergy, asthma, inflammatory bowel disease, coeliac disease and multiple sclerosis. The strength of the evidence for these protective associations is quite variable, and published studies often do not agree. This review article discusses some of the reasons for these discrepancies, and the difficulties faced when designing studies. Examples of some protective disease associations are described in detail, where the evidence is most abundant and thought to be more reliable. The most convincing of these are supported by published mechanistic data, for example with animal models, or incidence of disease exacerbation in humans following H. pylori eradication. Although controversial, this field is very important as the prevalence of H. pylori is decreasing throughout the world whilst many chronic diseases are becoming more common. These trends are likely to continue in the future, therefore it is important that we fully understand if and how H. pylori confers protection.
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spelling doaj.art-5872614a79c341ee992b7a14c5a63bc22022-12-22T01:35:07ZengMDPI AGDiseases2079-97212015-03-0132345510.3390/diseases3020034diseases3020034Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and ControversiesKaren Robinson0Nottingham Digestive Diseases Biomedical Research Unit, School of Medicine, University of Nottingham, Nottingham NG7 2RD, UKA large number of studies link H. pylori infection with a reduced risk of developing extra-gastric conditions such as allergy, asthma, inflammatory bowel disease, coeliac disease and multiple sclerosis. The strength of the evidence for these protective associations is quite variable, and published studies often do not agree. This review article discusses some of the reasons for these discrepancies, and the difficulties faced when designing studies. Examples of some protective disease associations are described in detail, where the evidence is most abundant and thought to be more reliable. The most convincing of these are supported by published mechanistic data, for example with animal models, or incidence of disease exacerbation in humans following H. pylori eradication. Although controversial, this field is very important as the prevalence of H. pylori is decreasing throughout the world whilst many chronic diseases are becoming more common. These trends are likely to continue in the future, therefore it is important that we fully understand if and how H. pylori confers protection.http://www.mdpi.com/2079-9721/3/2/34Helicobacter pyloriextra-gastric manifestationsGORDasthmaallergyautoimmuity
spellingShingle Karen Robinson
Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
Diseases
Helicobacter pylori
extra-gastric manifestations
GORD
asthma
allergy
autoimmuity
title Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
title_full Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
title_fullStr Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
title_full_unstemmed Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
title_short Helicobacter pylori-Mediated Protection against Extra-Gastric Immune and Inflammatory Disorders: The Evidence and Controversies
title_sort helicobacter pylori mediated protection against extra gastric immune and inflammatory disorders the evidence and controversies
topic Helicobacter pylori
extra-gastric manifestations
GORD
asthma
allergy
autoimmuity
url http://www.mdpi.com/2079-9721/3/2/34
work_keys_str_mv AT karenrobinson helicobacterpylorimediatedprotectionagainstextragastricimmuneandinflammatorydisorderstheevidenceandcontroversies