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  • Title: Anti-inflammatory effects of essential oil in Echinacea purpurea L.
    Author: Yu D, Yuan Y, Jiang L, Tai Y, Yang X, Hu F, Xie Z.
    Journal: Pak J Pharm Sci; 2013 Mar; 26(2):403-8. PubMed ID: 23455214.
    Abstract:
    Echinacea purpurea L. is a medicinal plant originally from North America. It has become a commonly used herbal medicine worldwide because it contains various biologically active compounds. This study was designed to investigate the anti-inflammatory effects of essential oils from E. purpurea in both mice and rats. The extract was obtained from flower of E. purpurea by steam distillation. The anti-inflammatory potential was evaluated in vivo by using different animal models such as xylene-induced mouse ear edema, egg-white-induced rat paw edema, and cotton-induced granuloma tissue proliferating inflammation in mice. The serial dosages were used in vivo: the low dosage, the medium dosage and the high dosage. The low, medium and high dosages of extracts produced inhibitions of 39.24%, 47.22% and 44.79% respectively in the ear edema induced by xylene when compare with the control group. Only the high dosage group showed statistically significant inhibition (48.51%) of paw edema formation induced three hours by egg white compared with the control group (P<0.01). Moreover, the granulation formation was also significantly reduced the most by 28.52% in the high dose groups compared with the control group (P <0.05). The pro-inflammatory cytokines such as IL-2, IL-6 and TNF-α in the blood were reduced in the treated groups. The essential oils from extracts of E. purpurea have anti-inflammatory effects.
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