Kaempferol, a phytochemical found in many edible plants, is known to alleviate diseases such as cancer, allergy, and inflammation. The objective of this study was to investigate whether kaempferol could reduce omega-6 and ovalbumin-mediated allergic reactions at lung and trachea in BALB/c mice. Mice were allocated into five groups: 1) control group (CON); 2) positive control group with orally administration of omega-6 (POS); 3) bovine serum albumin (BSA) sensitization group (with BSA injection and ovalbumin inhalation); 4) BSA+K10 group: BSA injection, 10 μg/g of kaempferol administration and ovalbumin inhalation; and 5) BSA+K20 group: BSA injection, 20 μg/g of kaempferol administration and ovalbumin inhalation. Results revealed that serum histamine level was the highest (p<0.01) in BSA group. In lung tissue and trachea, cyclooxygenase 2 (Cox2) expression was significantly (p<0.05) higher in the BSA group compared to that in other groups. However, phosphorylated cytosolic phospholipase A2 (p-cPLA2) expression in the trachea was not significantly different among groups. Taken together, results of this study suggest that kaempferol might be useful for alleviating inflammation reaction associated with Cox2 expression. However, the exact mechanism of action involved in the effect of kaempferol on inflammatory response remains unclear.
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