title: Rosmarinic acid in perilla extract inhibits allergic inflammation induced by mite allergen, in a mouse model.
abstract: BACKGROUND
  Perilla and its constituent rosmarinic acid have been suggested to have anti-allergic activity. However, few studies have examined the effects on allergic asthma.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate the effect of oral administration of perilla leaf extract, which contains high amount of rosmarinic acid, on a murine model of allergic asthma induced by house dust mite allergen.
  
  
  METHODS
  C3H/He mice were sensitized by intratracheal administration of Dermatophagoides farinae (Der f). Mice were orally treated with rosmarinic acid in perilla extract (PE) (1.5 mg/mouse/day).
  
  
  RESULTS
  Der f challenge of sensitized mice elicited pulmonary eosinophilic inflammation, accompanied by an increase in lung expression of IL-4 and IL-5, and eotaxin. Daily treatment with rosmarinic acid in PE significantly prevented the increases in the numbers of eosinophils in bronchoalveolar lavage fluids and also in those around murine airways. Rosmarinic acid in PE treatment also inhibited the enhanced protein expression of IL-4 and IL-5, and eotaxin in the lungs of sensitized mice. Der f challenge also enhanced allergen-specific IgG1, which were also inhibited by rosmarinic acid in PE.
  
  
  CONCLUSIONS
  These results suggest that oral administration of perilla-derived rosmarinic acid is an effective intervention for allergic asthma, possibly through the amelioration of increases in cytokines, chemokines, and allergen-specific antibody.
authors.affiliation: Health and Bioscience Laboratories, Meiji Seika Kaisha, Ltd, Sakado, Saitama, Japan. Chiaki_sambongi@meiji.co.jp
authors.forename: C
authors.initials: C
authors.lastname: Sanbongi
authors.forename: H
authors.initials: H
authors.lastname: Takano
authors.forename: N
authors.initials: N
authors.lastname: Osakabe
authors.forename: N
authors.initials: N
authors.lastname: Sasa
authors.forename: M
authors.initials: M
authors.lastname: Natsume
authors.forename: R
authors.initials: R
authors.lastname: Yanagisawa
authors.forename: K-I
authors.initials: KI
authors.lastname: Inoue
authors.forename: K
authors.initials: K
authors.lastname: Sadakane
authors.forename: T
authors.initials: T
authors.lastname: Ichinose
authors.forename: T
authors.initials: T
authors.lastname: Yoshikawa
mesh_terms: D000284:Administration, Oral; D000485:Allergens; D000818:Animals; D002934:Cinnamates / Q000008:administration & dosage*; D053630:Depsides; D006967:Hypersensitivity / Q000188:drug therapy* / Q000276:immunology; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D008925:Mites; D031344:Perilla frutescens; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage*; D000097123:Rosmarinic Acid
chemical_list: D000485:Allergens; D002934:Cinnamates; D053630:Depsides; D010936:Plant Extracts; D000097123:Rosmarinic Acid