Plants are considered as an essential source to treat different diseases. In traditional system of medicine, Juglans regia (J. regia) has been used in curing sinusitis and cough. The aim of the present study was to evaluate the anti-asthmatic activity of J. regia in ovalbumin-induced allergic asthmatic BALB/c mice. The mice were sensitized intraperitoneally and subsequently challenged with ovalbumin (intranasal) to induce allergic asthma. Mice were treated with methanolic, n-hexane and ethyl acetate extracts of J. regia and methylprednisolone for 7 consecutive days, along with intranasal challenge. The total and differential leukocyte counts in blood, bronchoalveolar lavage fluid (balf) and lung wet/dry ratio were determined. GC-MS analysis was also performed. The results showed that ethyl acetate extract of J. regia significantly reduced inflammatory cells count in both blood and balf more significantly. Lung wet/dry weight ratio was reduced in asthmatic mice treated with the different extracts of J. regia. Serum IgE antibodies level was also significantly decreased in extracts treated groups. GC-MS analysis of all three extracts of J. regia showed the presence of various phytochemicals responsible for its anti-inflammatory and anti-asthmatic activity. The results of the present study validated the traditional use of J. regia in respiratory disorders like asthma and sinusitis.

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