PMID- 33260893 OWN - NLM STAT- MEDLINE DCOM- 20210304 LR - 20210304 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 21 IP - 23 DP - 2020 Nov 27 TI - Eosinophil microRNAs Play a Regulatory Role in Allergic Diseases Included in the Atopic March. LID - 10.3390/ijms21239011 [doi] LID - 9011 AB - (1) Background: The atopic march is defined by the increased prevalence of allergic diseases after atopic dermatitis onset. In fact, atopic dermatitis is believed to play an important role in allergen sensitization via the damaged skin barrier, leading to allergic diseases such as allergic asthma and allergic rhinitis. The eosinophil, a pro-inflammatory cell that contributes to epithelial damage, is one of the various cells recruited in the inflammatory reactions characterizing these diseases. Few studies were conducted on the transcriptome of this cell type and even less on their specific microRNA (miRNA) profile, which could modulate pathogenesis of allergic diseases and clinical manifestations post-transcriptionally. Actually, their implication in allergic diseases is not fully understood, but they are believed to play a role in inflammation-related patterns and epithelial cell proliferation. (2) Methods: Next-generation sequencing was performed on RNA samples from eosinophils of individuals with atopic dermatitis, atopy, allergic rhinitis and asthma to obtain differential counts of primary miRNA (pri-miRNA); these were also analyzed for asthma-related phenotypes such as forced expiratory volume in one second (FEV(1)), immunoglobulin E (IgE) and provocative concentration of methacholine inducing a 20% fall in forced expiratory volume in 1 s (PC(20)) levels, as well as FEV(1) to forced vital capacity (FEV(1)/FVC) ratio. (3) Results: Eighteen miRNAs from eosinophils were identified to be significantly different between affected individuals and unaffected ones. Based on counts from these miRNAs, individuals were then clustered into groups using Ward's method on Euclidian distances. Groups were found to be explained by asthma diagnosis, familial history of respiratory diseases and allergic rhinitis as well as neutrophil counts. (4) Conclusions: The 18 differential miRNA counts for the studying phenotypes allow a better understanding of the epigenetic mechanisms underlying the development of the allergic diseases included in the atopic march. FAU - Belanger, Emile AU - Belanger E AD - Departement des Sciences Fondamentales, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. AD - Centre Intersectoriel en Sante Durable, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. FAU - Madore, Anne-Marie AU - Madore AM AD - Departement des Sciences Fondamentales, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. AD - Centre Intersectoriel en Sante Durable, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. FAU - Boucher-Lafleur, Anne-Marie AU - Boucher-Lafleur AM AD - Departement des Sciences Fondamentales, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. AD - Centre Intersectoriel en Sante Durable, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. FAU - Simon, Marie-Michelle AU - Simon MM AD - Department of Human Genetics, McGill University, Montreal, QC H3A 0C7, Canada. FAU - Kwan, Tony AU - Kwan T AD - Department of Human Genetics, McGill University, Montreal, QC H3A 0C7, Canada. AD - McGill University and Genome Quebec Innovation Center, Montreal, QC H3A 0G1, Canada. FAU - Pastinen, Tomi AU - Pastinen T AD - Department of Human Genetics, McGill University, Montreal, QC H3A 0C7, Canada. AD - McGill University and Genome Quebec Innovation Center, Montreal, QC H3A 0G1, Canada. AD - Center for Pediatric Genomic Medicine, Kansas City, MO 64108, USA. FAU - Laprise, Catherine AU - Laprise C AUID- ORCID: 0000-0001-5526-9945 AD - Departement des Sciences Fondamentales, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. AD - Centre Intersectoriel en Sante Durable, Universite du Quebec a Chicoutimi, Saguenay, QC G7H 2B1, Canada. LA - eng GR - 133605/CAPMC/CIHR/Canada GR - 230552/Canada Research Chairs/ PT - Journal Article DEP - 20201127 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (MicroRNAs) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Cluster Analysis MH - Dermatitis, Atopic/*genetics MH - Eosinophils/*metabolism MH - Female MH - Gene Expression Regulation MH - Humans MH - Hypersensitivity/*genetics MH - Male MH - MicroRNAs/genetics/*metabolism MH - Middle Aged MH - Phenotype MH - Young Adult PMC - PMC7730597 OTO - NOTNLM OT - allergy OT - asthma OT - atopic march OT - eosinophils OT - gene expression OT - miRNAs OT - microRNAs OT - sequencing COIS- The authors declare no conflict of interest. EDAT- 2020/12/03 06:00 MHDA- 2021/03/05 06:00 PMCR- 2020/12/01 CRDT- 2020/12/02 01:03 PHST- 2020/10/07 00:00 [received] PHST- 2020/11/23 00:00 [revised] PHST- 2020/11/25 00:00 [accepted] PHST- 2020/12/02 01:03 [entrez] PHST- 2020/12/03 06:00 [pubmed] PHST- 2021/03/05 06:00 [medline] PHST- 2020/12/01 00:00 [pmc-release] AID - ijms21239011 [pii] AID - ijms-21-09011 [pii] AID - 10.3390/ijms21239011 [doi] PST - epublish SO - Int J Mol Sci. 2020 Nov 27;21(23):9011. doi: 10.3390/ijms21239011.