RESUMEN
BACKGROUND: In traditional medicine, Linum usitatissimum treats inflammatory, gastrointestinal, and cardiovascular diseases. OBJECTIVES: The present study aims to assess the anti-inflammatory and anti-oxidant effects of total alkaloid extract from Linum usitatissimum seeds (ALU) on the ear histological integrity and oxidant- antioxidant status in a mice model of a sub-chronic inflammation induced by multiapplication of TPA. METHODS: Topical TPA treatment induced various inflammatory changes, including edema formation, epidermal thickness, and the excess production of reactive oxygen species. Tissue samples were used for the measurement of reduced glutathione (GSH) and nitric oxide (NO) levels and Myeloperoxidase (MPO) and Catalase (CAT) activities. RESULTS: Oral administration of ALU (50, 100, and 200 mg/kg) produced anti-inflammatory and anti-oxidant effects. Also, ALU significantly reduced ear edema and inflammatory cell infiltration and restored the integrity of the ear. CONCLUSION: These findings suggest that the total alkaloid extract from Linum usitatissimum seeds presents significant anti-inflammatory and anti-oxidant effects on TPA-induced sub-chronic inflammation model in NMRI mice and can be used as an anti-inflammatory and anti-oxidant agent for the therapeutic management of inflammatory disorders.