alexa Anti-inflammatory and anti-nociceptive effects of the ethanolic extracts of Alkanna frigida and Alkanna orientalis.
Pharmaceutical Sciences

Pharmaceutical Sciences

Medicinal & Aromatic Plants

Author(s): Esfahani HM, Esfahani ZN, Dehaghi NK, HosseiniSharifabad A, Tabrizian K,

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Abstract Alkanna species are used in Iranian traditional medicine for treatment of rheumatoid arthritis and other inflammatory diseases. This study was designed to evaluate the anti-inflammatory and anti-nociceptive effects of Alkanna frigida and Alkanna orientalis ethanolic extracts via the carrageenan-induced paw edema test and formalin test in rat and mouse, respectively. Ethanolic extracts of plant root were prepared and were injected intraperitoneally 60 min before carrageenan-induced inflammation or formalin-induced nociception at 100, 200 and 400 mg/kg. Anti-inflammatory effects of plants were monitored for 3 h after carrageenan injection and anti-nociceptive effects were evaluated during the first hour after formalin injection. Diclofenac, a well-known anti-inflammatory and anti-nociceptive agent, was used as a positive control. Our results show that, in contrast to Alkanna orientalis, ethanolic extract of Alkanna frigida significantly decreases carrageenan-induced inflammation at 400 mg/kg, especially 3 h after inflammation induction. Both Alkanna frigida and Alkanna orientalis ethanolic extracts possess a remarkable anti-nociceptive effect at each dose (100, 200 and 400 mg/kg) in a dose-dependent manner during the first hour after formalin injection.The present findings provide more evidence for the potential anti-nociceptive effect of Alkanna sp. and the anti-inflammatory effect of Alkanna frigida. It supports their traditional indication in the treatment of pain and inflammatory-related diseases. These useful effects may result from the inhibitory interaction of the plant ethanolic extract with cyclooxygenase-2 enzyme and the subsequent reduction in prostaglandin production. This article was published in J Nat Med and referenced in Medicinal & Aromatic Plants

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