The Effect of Platanus orientalis L. Distillate on Mouse Model of Allergic Rhinitis

Platanus orientalis L. has been used in traditional Persian medicine to treat allergic rhinitis. In this study, the therapeutic effects of P. orientalis L. distillate on allergic rhinitis mouse model were assessed. Furthermore, chemical components of P. orientalis L. were analyzed, using gas chromatography–mass spectrometry. Allergic rhinitis was induced in ninety mice using ovalbumin, and they were divided into six groups (group 1: negative control, experienced no treatment; group 2: positive control, received loratadine; groups 3, 4 and 5: received different amounts of P. orientalis L. distillate, orally and group 6: received intranasal P. orientalis L. distillate). Clinical signs, serum level of interleukin 4 and eosinophil counts of nasal mucosa were determined. α-eudesmol and β-eudesmol were found as the major components of the distillate. Clinical signs improved significantly in the groups that had received P. orientalis L. distillate in comparison with the control group. Also, pathological findings were in favor of decrement in the nasal mucosal eosinophil counts. The serum level of interleukin 4 was not in the detectable ranges in any of the groups. Improving effects of P. orientalis L. distillate were observed in allergic rhinitis mouse models.