title: The effect of nano-silver on allergic rhinitis model in mice.
abstract: OBJECTIVE
  Silver has long been known as a strong antimicrobial and disinfectant. Several types of nano-silver coated products have been developed. However, the antimicrobial and disinfectant characteristics of nano-silver have not been well studied. The aim of this study was to investigate the effect of nano-silver on allergic inflammation in a mouse model.
  
  
  METHODS
  Female BALB/C mice were sensitized by intraperitoneal injection of ovalbumin (OVA) and aluminium hydroxide on days 0, 7, 14, and 21. Mice were challenged with intranasal instillation of OVA. Nano-silver was also administered nasally prior to intranasal instillation of OVA. Severity of allergic rhinitis was assessed according to nasal symptoms, serum OVA-specific IgE level, interleukin (IL)-4, IL-10, and interferon (INF)-γ levels in nasal lavage fluid. Hematoxylin-eosin stain and periodic acid-Schiff stain were performed for evaluation of histological change.
  
  
  RESULTS
  Nano-silver attenuated manifestation of nasal symptoms in sensitized mice and inhibited production of OVA-specific IgE, IL-4, and IL-10, however, it had no effect on INF-γ level. In addition, the degree of inflammatory cell infiltration and goblet cell hyperplasia was attenuated by nano-silver.
  
  
  CONCLUSIONS
  These results suggest that nano-silver may effectively reduce allergic inflammation in a mouse model of allergic rhinitis. Through its properties as an anti-inflammatory agent, nano-silver may be a useful therapeutic strategy.
authors.affiliation: Department of Otorhinolaryngology, Catholic University of Daegu School of Medicine, Daegu, Korea.
authors.forename: Seung-Heon
authors.initials: SH
authors.lastname: Shin
authors.forename: Mi-Kyung
authors.initials: MK
authors.lastname: Ye