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Curr Opin Immunol. 2017 Oct;48:51-60. doi: 10.1016/j.coi.2017.08.003. Epub 2017 Aug 29.

Immune development and environment: lessons from Amish and Hutterite children.

Author information

1
Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA. Electronic address: c-ober@genetics.uchicago.edu.
2
Section of Pulmonary and Critical Care Medicine, Department of Medicine and the Committee on Immunology, University of Chicago, Chicago, IL 60637, USA.
3
Dr. von Hauner Children's Hospital, Ludwig Maximilians University Munich, Germany; Comprehensive Pneumology Center, Munich, Germany; German Center for Lung Research, Germany.
4
Department of Cellular and Molecular Medicine, Asthma and Airway Disease Research Center, and Bio5 Institute, The University of Arizona, Tucson, AZ 85724, USA.

Abstract

Children who grow up in traditional farm environments are protected from developing asthma and allergy. This 'farm effect' can be largely explained by the child's early life contact with farm animals, in particular cows, and their microbes. Our studies in Amish and Hutterite school children living on farms in the U.S. have further demonstrated that this protection is mediated through innate immune pathways. Although very similar with respect to ancestry and many lifestyle factors that are associated with asthma risk, Amish and Hutterites follow farming practices that are associated with profound differences in the levels of house dust endotoxin, in the prevalence of asthma and atopy among school children, and in the proportions, phenotypes, and functions of immune cells from these children. In this review, we will consider our studies in Amish and Hutterites children in the context of the many previous studies in European farm children and discuss how these studies have advanced our understanding of the asthma-protective 'farm effect'.

PMID:
28843541
PMCID:
PMC5682224
DOI:
10.1016/j.coi.2017.08.003
[Indexed for MEDLINE]
Free PMC Article

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