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Th17/Treg ratio derived using DNA methylation analysis is associated with the late phase asthmatic response Singh, Amrit; Yamamoto, Masatsugu; Ruan, Jian; Choi, Jung Y.; Gauvreau, Gail M.; Olek, Sven; Hoffmueller, Ulrich; Carlsten, Christopher Russell; FitzGerald, J. M.; Boulet, Louis-Philippe; O’Byrne, Paul M., 1951-; Tebbutt, Scott J.

Abstract

Background: The imbalance between Th17 and Treg cells has been studied in various diseases including allergic asthma but their roles have not been fully understood in the development of the late phase asthmatic response. Objectives: To determine changes in Th17 and Treg cell numbers between isolated early responders (ERs) and dual responders (DRs) undergoing allergen inhalation challenge. To identify gene expression profiles associated with Th17 and Treg cells. Methods: 14 participants (8 ERs and 6 DRs) with mild allergic asthma underwent allergen inhalation challenge. Peripheral blood was collected prior to and 2 hours post allergen challenge. DNA methylation analysis was used to quantifiy the relative frequencies of Th17, Tregs, total B cells, and total T cells. Gene expression from whole blood was measured using microarrays. Technical replication of selected genes was performed using nanoString nCounter Elements. Results: The Th17/Treg ratio significantly increased in DRs compared to ERs post allergen challenge compared to pre-challenge. Genes significantly correlated to Th17 and Treg cell counts were inversely correlated with each other. Genes significantly correlated with Th17/Treg ratio included the cluster of genes of the leukocyte receptor complex located on chromosome 19q 13.4. Conclusions: Th17/Treg imbalance post-challenge may contribute to the development of the late phase inflammatory phenotype.

Item Metadata

Title
Th17/Treg ratio derived using DNA methylation analysis is associated with the late phase asthmatic response
Creator
Singh, Amrit; Yamamoto, Masatsugu; Ruan, Jian; Choi, Jung Y.; Gauvreau, Gail M.; Olek, Sven; Hoffmueller, Ulrich; Carlsten, Christopher Russell; FitzGerald, J. M.; Boulet, Louis-Philippe; O’Byrne, Paul M., 1951-; Tebbutt, Scott J.
Contributor
James Hogg iCAPTURE Centre (University of British Columbia)
Publisher
BioMed Central
Date Issued
2014-06-24
Description
Background: The imbalance between Th17 and Treg cells has been studied in various diseases including allergic asthma but their roles have not been fully understood in the development of the late phase asthmatic response. Objectives: To determine changes in Th17 and Treg cell numbers between isolated early responders (ERs) and dual responders (DRs) undergoing allergen inhalation challenge. To identify gene expression profiles associated with Th17 and Treg cells. Methods: 14 participants (8 ERs and 6 DRs) with mild allergic asthma underwent allergen inhalation challenge. Peripheral blood was collected prior to and 2 hours post allergen challenge. DNA methylation analysis was used to quantifiy the relative frequencies of Th17, Tregs, total B cells, and total T cells. Gene expression from whole blood was measured using microarrays. Technical replication of selected genes was performed using nanoString nCounter Elements. Results: The Th17/Treg ratio significantly increased in DRs compared to ERs post allergen challenge compared to pre-challenge. Genes significantly correlated to Th17 and Treg cell counts were inversely correlated with each other. Genes significantly correlated with Th17/Treg ratio included the cluster of genes of the leukocyte receptor complex located on chromosome 19q 13.4. Conclusions: Th17/Treg imbalance post-challenge may contribute to the development of the late phase inflammatory phenotype.
Subject
Allergen inhalation challenge; Asthma; Asthmatic response; DNA methylation; Epigenetic cell counting; Peripheral blood; Th17/Treg ratio; nCounter Elements
Genre
Article
Type
Text
Language
eng
Date Available
2016-01-11
Provider
Vancouver : University of British Columbia Library
Rights
Attribution 4.0 International (CC BY 4.0)
DOI
10.14288/1.0223258
URI
http://hdl.handle.net/2429/56394
Affiliation
Medicine, Department of; Medicine, Faculty of
Citation
Allergy, Asthma & Clinical Immunology. 2014 Jun 24;10(1):32
Publisher DOI
10.1186/1710-1492-10-32
Peer Review Status
Reviewed
Scholarly Level
Faculty
Copyright Holder
Singh et al.; licensee BioMed Central Ltd.
Rights URI
http://creativecommons.org/licenses/by/4.0/
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Attribution 4.0 International (CC BY 4.0)