Shared DNA methylation signatures in childhood allergy: The MeDALL study - Sorbonne Université
Journal Articles Journal of Allergy and Clinical Immunology Year : 2021

Shared DNA methylation signatures in childhood allergy: The MeDALL study

Cheng-Jian Xu
  • Function : Author
Olena Gruzieva
Cancan Qi
Ana Esplugues
  • Function : Author
Ulrike Gehring
Anna Bergström
  • Function : Author
Dan Mason
  • Function : Author
Leda Chatzi
  • Function : Author
Daniela Porta
  • Function : Author
Karin C Lodrup Carlsen
  • Function : Author
Anne-Marie Madore
  • Function : Author
Harri Alenius
  • Function : Author
Bianca van Rijkom
  • Function : Author
Soesma A Jankipersadsing
  • Function : Author
Pieter van Der Vlies
  • Function : Author
Inger Kull
  • Function : Author
Marianne van Hage
  • Function : Author
Mariona Bustamante
Aitana Lertxundi
  • Function : Author
Matias Torrent
  • Function : Author
Gillian Santorelli
  • Function : Author
Maria Pia Fantini
  • Function : Author
Vegard Hovland
  • Function : Author
Nanna Fyhrquist
  • Function : Author
Tiina Laatikainen
  • Function : Author
Martijn C Nawijn
  • Function : Author
Yang Li
Cisca Wijmenga
  • Function : Author
Mihai G Netea
  • Function : Author
Josep M Anto
  • Function : Author
Catherine Laprise
  • Function : Author
Tari Haahtela
Kai-Håkon Carlsen
  • Function : Author
Davide Gori
  • Function : Author
Manolis Kogevinas
John Wright
  • Function : Author
Cilla Söderhäll
  • Function : Author
Judith M Vonk
  • Function : Author
Jordi Sunyer
  • Function : Author
Erik Melén
  • Function : Author
Gerard H Koppelman
  • Function : Author
Maria Pia Fantini
  • Function : Author

Abstract

Background: Differential DNA methylation associated with allergy might provide novel insights into the shared or unique etiology of asthma, rhinitis, and eczema. Objective: We sought to identify DNA methylation profiles associated with childhood allergy. Methods: Within the European Mechanisms of the Development of Allergy (MeDALL) consortium, we performed an epigenome-wide association study of whole blood DNA methylation by using a cross-sectional design. Allergy was defined as having symptoms from at least 1 allergic disease (asthma, rhinitis, or eczema) and positive serum-specific IgE to common aeroallergens. The discovery study included 219 case patients and 417 controls at age 4 years and 228 case patients and 593 controls at age 8 years from 3 birth cohorts, with replication analyses in 325 case patients and 1111 controls. We performed additional analyses on 21 replicated sites in 785 case patients and 2124 controls by allergic symptoms only from 8 cohorts, 3 of which were not previously included in analyses. Results: We identified 80 differentially methylated CpG sites that showed a 1% to 3% methylation difference in the discovery phase, of which 21 (including 5 novel CpG sites) passed genome-wide significance after meta-analysis. All 21 CpG sites were also significantly differentially methylated with allergic symptoms and shared between asthma, rhinitis, and eczema. The 21 CpG sites mapped to relevant genes, including ACOT7, LMAN3, and CLDN23. All 21 CpG sties were differently methylated in asthma in isolated eosinophils, and 10 were replicated in respiratory epithelium. Conclusion: Reduced whole blood DNA methylation at 21 CpG sites was significantly associated with childhood allergy. The findings provide novel insights into the shared molecular mechanisms underlying asthma, rhinitis, and eczema.
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hal-03477217 , version 1 (13-12-2021)

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Cheng-Jian Xu, Olena Gruzieva, Cancan Qi, Ana Esplugues, Ulrike Gehring, et al.. Shared DNA methylation signatures in childhood allergy: The MeDALL study. Journal of Allergy and Clinical Immunology, 2021, 147 (3), pp.1031 - 1040. ⟨10.1016/j.jaci.2020.11.044⟩. ⟨hal-03477217⟩
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