title: Oxyresveratrol ameliorates allergic airway inflammation via attenuation of IL-4, IL-5, and IL-13 expression levels.
abstract: OBJECTIVE
  Oxyresveratrol is known to possess anti-inflammatory property. Current study investigates the immunosuppressive effect of oxyresveratrol by using mouse model of ovalbumin (OVA)-induced allergic airway inflammation.
  
  
  METHODS
  BALB/c mice were randomly divided into five groups having 8 mice in each group. Treatment with low dose (7 mg/kg) and high dose (15 mg/kg) of oxyresveratrol, and methylprednisolone (15 mg/kg; standard drug) was started 2 week after immunization of mice with ovalbumin and continued for 7d. Ovalbumin was also injected into pinna of right ear 24h before sacrificing the mice to evaluate delayed type hypersensitivity (DTH). H&E and PAS staining were used for histopathological evaluation of lungs. Reverse transcription polymerase chain reaction followed by gel electrophoresis were used for evaluation of mRNA expression levels of IL-4, IL-5, and IL-13.
  
  
  RESULTS
  Oxyresveratrol significantly reduced total leucocyte count in both blood and bronchoalveolar lavage fluid (BALF). Treatment with oxyresveratrol normalized altered eosinophil and neutrophil counts in both blood and BALF. OVA-specific T-cell response was also significantly inhibited by oxyresveratrol. A significant attenuation of inflammatory cell infiltration and goblet cell hyperplasia was observed after treatment with oxyresveratrol. Data showed that oxyresveratrol significantly suppressed Th2 (T helper cells) type immune response which was obvious by the reduction in mRNA expression levels of IL-4, IL-5, and IL-13. Similarly, treatment with methylprednisolone also significantly reduced all the immunomodulatory and inflammatory parameters.
  
  
  CONCLUSIONS
  Our study demonstrates that oxyresveratrol ameliorates allergic asthma. The anti-asthmatic activity might in part occur via the down regulation of IL-4, IL-5, and IL-13 expression levels.
authors.affiliation: Department of Pharmacology, University of Health Sciences, Lahore, Pakistan.
authors.forename: Muhammad Imran
authors.initials: MI
authors.lastname: Ashraf
authors.affiliation: Department of Pharmacology, University of Health Sciences, Lahore, Pakistan. Electronic address: shahzad912@hotmail.com.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Shahzad
authors.affiliation: Department of Pharmacology, University of Health Sciences, Lahore, Pakistan.
authors.forename: Arham
authors.initials: A
authors.lastname: Shabbir
mesh_terms: D000818:Animals; D001992:Bronchoalveolar Lavage Fluid; D006967:Hypersensitivity / Q000276:immunology / Q000517:prevention & control*; D018793:Interleukin-13 / Q000378:metabolism*; D015847:Interleukin-4 / Q000378:metabolism*; D015848:Interleukin-5 / Q000378:metabolism*; D008168:Lung / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D010047:Ovalbumin / Q000008:administration & dosage; D010936:Plant Extracts / Q000494:pharmacology*; D013267:Stilbenes / Q000494:pharmacology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D018793:Interleukin-13; D015848:Interleukin-5; D010936:Plant Extracts; D013267:Stilbenes; D015847:Interleukin-4; C034912:puag-haad; D010047:Ovalbumin
keywords: Airway inflammation; Anti-inflammatory; Immunomodulatory; Oxyresveratrol