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Effects of PM2.5 on mucus secretion and tissue remodeling in a rabbit model of chronic rhinosinusitis

Renwu Zhao1, Zhiqiang Guo1, Weiyang Dong2

  • 1Department of Otolaryngology, Huadong Hospital, Fudan University, Shanghai, China.

International Forum of Allergy & Rhinology
|July 13, 2018
PubMed
Abstract

Insights

Fine particulate matter (PM2.5) exposure worsens chronic rhinosinusitis (CRS) by damaging nasal cilia and increasing mucus. This study reveals PM2.5

Area of Science:

  • Environmental Health
  • Otorhinolaryngology
  • Toxicology

Background:

  • Epidemiologic studies link fine particulate matter (PM2.5) to increased chronic rhinosinusitis (CRS) incidence and severity.
  • The precise role of PM2.5 in CRS pathophysiology is not fully understood.
  • This research investigates PM2.5's impact on nasal cilia, tissue remodeling, and mucus in a rabbit CRS model.

Purpose of the Study:

  • To elucidate the pathophysiological mechanisms by which PM2.5 exacerbates CRS.
  • To evaluate the effects of PM2.5 exposure on nasal cilia function, mucosal histology, and mucus production in a rabbit model.

Main Methods:

  • Rabbits with CRS were exposed to ambient PM2.5.
  • Ciliary damage was assessed using scanning electron microscopy (SEM).
  • Goblet cell hyperplasia and collagen deposition were evaluated via PAS and MT staining, respectively. MUC5AC expression was analyzed using immunohistochemistry.

Main Results:

  • PM2.5 exposure significantly aggravated ciliary disruption in CRS rabbits.
  • Increased goblet cell hyperplasia and collagen deposition were observed.
  • Elevated MUC5AC expression in the nasal mucosa indicated enhanced mucus production.

Conclusions:

  • PM2.5 exposure exacerbates CRS by increasing ciliary disruption, nasal remodeling, and mucus hypersecretion.
  • These findings suggest key pathophysiological mechanisms for PM2.5-induced CRS aggravation.
  • Understanding these mechanisms is crucial for developing targeted interventions against air pollution-related CRS.
Keywords:
chronic rhinosinusitisfine particulate matter (PM2.5)mucusnasal mucosaremodeling

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