Abstract. Inflammation of the respiratory tract is a crucial process in immune diseases, including asthma, and atopic rhinitis. To establish whether an aqueous extract of Spinacia oleracea Linn (SoL) has a beneficial influence in terms of antiasthmatic activity, we examined its effects on an ovalbumininduced asthmatic model. Mice sensitized to ovalbumin were orally administered the SoL extract, and their lungs examined by hematoxylin and eosin staining to determine IL-4/13 cytokine expression. The SoL extract exerted strong antiasthmatic effects by inducing a decrease in the CD4 + cell number, IL-4/13, and other molecular markers in the lung. Our results collectively indicate that the aqueous SoL extract ameliorates asthmatic symptoms effectively in a mouse ovalbumin-challenge model.
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