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Circulating microRNAs associated with bronchodilator response in childhood asthma
Rinku Sharma1, Anshul Tiwari2,3, Alvin T Kho2,4
1Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. rersh@channing.harvard.edu.
BMC Pulmonary Medicine
|November 4, 2024
Summary
MicroRNAs (miRNAs) miR-1246 and miR-200b-3p are linked to bronchodilator response variability in asthma patients. These findings highlight miRNAs as key regulators in differing treatment responses among individuals with asthma.
Area of Science:
- Genetics
- Molecular Biology
- Pulmonology
Background:
- Bronchodilator response (BDR) in asthma varies significantly among patients.
- MicroRNAs (miRNAs) are regulators of gene expression and may influence BDR.
- Understanding miRNA associations with BDR can elucidate asthma pathophysiology.
Purpose of the Study:
- To identify circulating miRNAs linked to BDR in asthma.
- To explore the mechanisms behind BDR variability.
Main Methods:
- Small RNA sequencing of serum from 1,134 children with asthma (Genetics of Asthma in Costa Rica Study).
- Differential expression analysis (DeSeq2) comparing highest and lowest BDR quartiles.
- Replication in an adult asthma cohort (LOCCS) and pathway enrichment analysis.
Main Results:
- Ten down-regulated and one up-regulated miRNA identified in high vs. low BDR groups.
- Two miRNAs, miR-200b-3p and miR-1246, replicated in the adult cohort.
- Enriched pathways include cholesterol biosynthesis, ESR-mediated signaling, and TGFB signaling.
Conclusions:
- miR-1246 and miR-200b-3p are associated with BDR in both childhood and adult asthma.
- These miRNAs contribute to understanding the genomic regulatory mechanisms underlying BDR variation.
- Findings support the role of miRNAs in differential asthma treatment responses.
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