Pharmacologic Effect of Miao Medicine Illicium simonsii Maxim. on Collagen-Induced Arthritis in Rats

Objectives. To study the pharmacologic effect and mechanism of action of Miao medicine Illicium simonsii Maxim. (ISM) in treating rheumatoid arthritis. Methods. Sixty rats were randomly divided to six groups: normal control (normal), collagen-induced arthritis (CIA) model (model), CIA + tripterygium glycosides (TG), CIA + ISM high dose oral (ISM-H), CIA + ISM low-dose oral (ISM-L), and CIA + ISM topical application (ISM-T). The treatment doses were selected based on published reports and folk medicine practice. The outcome measurements included paw swelling, joint pathology, organ index, blood count, T helper 17 (Th17) cell count, and interleukin-6 (IL-6) level. Results. Compared to the CIA model group, all treatment groups showed a significant reduction in paw swelling, blood vessel pathology, Th17 cell count, and IL-6 levels (p

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