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Pulmonary microRNA profiles identify involvement of Creb1 and Sec14l3 in bronchial epithelial changes in allergic

Sabine Bartel1,2, Nikola Schulz2,3, Francesca Alessandrini4

  • 1Early origins of chronic lung disease, Priority Area Asthma &Allergy, Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Borstel, Germany.

Scientific Reports
|April 7, 2017
PubMed

Insights

This study identifies novel molecular pathways in asthma pathogenesis using microRNAs (miRNAs). Researchers found that specific miRNAs target key proteins involved in allergic airway inflammation, offering new therapeutic targets for chronic asthma.

Area of Science:

  • Molecular biology
  • Immunology
  • Respiratory medicine

Background:

  • Asthma is a prevalent chronic respiratory disease with limited treatment options affecting its course.
  • Understanding early molecular events in asthma pathogenesis is crucial for developing effective therapies.
  • MicroRNAs (miRNAs) are key regulators of cellular signaling pathways with potential roles in disease development.

Purpose of the Study:

  • To identify novel asthma pathogenesis pathways using miRNAs.
  • To investigate the role of miRNA deregulation in allergic airway inflammation (AAI).
  • To validate miRNA targets in relevant asthma models and human cells.

Main Methods:

  • Assessed miRNA deregulation in mouse lungs with ovalbumin (OVA)-induced AAI.
  • Confirmed in silico predicted miRNA targets using reporter assays.
  • Validated findings in house-dust-mite (HDM)-induced AAI and human bronchial epithelial cells (NHBE).

Main Results:

  • Identified and validated Creb1 and Crtc1-3 as targets of miR-17, miR-144, and miR-21.
  • Found Sec14l3, a Creb1 target, downregulated in asthma models and IL13-treated NHBE cells.
  • Observed Sec14l3 expression correlated with ciliated cell development and inversely with goblet cell metaplasia.

Conclusions:

  • Creb1/Crtc1-3 and Sec14l3 are proposed as important in early bronchial epithelial responses to Th2 stimuli.
  • miRNA profiling can uncover novel therapeutic targets missed by mRNA-based strategies.
  • This research provides new insights into the molecular mechanisms underlying asthma.

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