Understanding Asthma and Allergies by the Lens of Biodiversity and Epigenetic Changes

Overview

Journal Front Immunol

Specialty Allergy & Immunology

Date 2021 Mar 18

PMID 33732246

Citations 12

Authors

Bianca Sampaio Dotto Fiuza

Hellen Freitas Fonseca

Pedro Milet Meirelles

Cintia Rodrigues Marques

Thiago Magalhaes da Silva

Camila Alexandrina Figueiredo

Affiliations

Soon will be listed here.

Abstract

Exposure to different organisms (bacteria, mold, virus, protozoan, helminths, among others) can induce epigenetic changes affecting the modulation of immune responses and consequently increasing the susceptibility to inflammatory diseases. Epigenomic regulatory features are highly affected during embryonic development and are responsible for the expression or repression of different genes associated with cell development and targeting/conducting immune responses. The well-known, "window of opportunity" that includes maternal and post-natal environmental exposures, which include maternal infections, microbiota, diet, drugs, and pollutant exposures are of fundamental importance to immune modulation and these events are almost always accompanied by epigenetic changes. Recently, it has been shown that these alterations could be involved in both risk and protection of allergic diseases through mechanisms, such as DNA methylation and histone modifications, which can enhance Th2 responses and maintain memory Th2 cells or decrease Treg cells differentiation. In addition, epigenetic changes may differ according to the microbial agent involved and may even influence different asthma or allergy phenotypes. In this review, we discuss how exposure to different organisms, including bacteria, viruses, and helminths can lead to epigenetic modulations and how this correlates with allergic diseases considering different genetic backgrounds of several ancestral populations.

Citing Articles

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