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Updated: Oct 19, 2025

Identification and Characterization of Immunogenic RNA Species in HDM Allergens that Modulate Eosinophilic Lung Inflammation
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Regulatory roles of three miRNAs on allergen mRNA expression in Tyrophagus putrescentiae

Ying Zhou1, Qingqing Li2, Ruilin Pan2

  • 1Department of Pediatrics Laboratory, The Affiliated Wuxi Children's Hospital of Nanjing Medical University, Wuxi, China.

Allergy
|September 27, 2021
PubMed
Abstract

Insights

MicroRNAs (miRNAs) regulate allergen gene expression in the dust mite Tyrophagus putresecentiae. This study identified specific miRNAs targeting key allergens, revealing a novel regulatory mechanism in mite allergy.

Area of Science:

  • Allergen research
  • Molecular biology
  • Mite biology

Background:

  • Tyrophagus putresecentiae mites are significant causes of allergic disease.
  • MicroRNAs (miRNAs) are suspected regulators of allergen gene expression.
  • No prior studies have directly investigated miRNA regulation of allergens in T. putresecentiae.

Purpose of the Study:

  • To profile miRNAs and identify their target allergen messenger RNAs (mRNAs) in T. putresecentiae.
  • To elucidate the regulatory networks between miRNAs and allergen-encoding mRNAs throughout mite development.

Main Methods:

  • Construction of small RNA and transcriptome libraries from different developmental stages (eggs, larvae, nymphs, adults).
  • Deep sequencing of miRNAs and whole transcriptomes.
  • Bioinformatic analysis to explore miRNA-mRNA regulatory networks.
  • Validation using qRT-PCR and a double-fluorescent reporter gene system.

Main Results:

  • 540 miRNAs identified, with 155 showing significant differential expression across developmental stages; 59 were novel.
  • Differential expression patterns of key allergens (Tyr p 1, 2-5, 7, 10, 13, 33, 34, 28, 35, 36) were observed across developmental stages.
  • Specific miRNAs (PC-5p-5698441_1, PC-5p-7050653_1, PC-5p-5534223_1) were identified as regulators of Tyr p 3, Tyr p 4, and Tyr p 34 allergens.

Conclusions:

  • This is the first study to profile allergen mRNA expression and miRNAs throughout the life cycle of an allergen-producing mite.
  • MicroRNAs directly bind to and regulate the expression of target allergen mRNAs in T. putresecentiae.
  • Findings provide new insights into the molecular mechanisms underlying mite allergy.
Keywords:
Tyrophagus putrescentiaedouble-fluorescent reporter gene systemmicroRNAqRT-PCRtranscriptome

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