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23 October 2019 : Animal Research  

Anti-Inflammatory Effects of Different Elution Fractions of Er-Miao-San on Acute Inflammation Induced by Carrageenan in Rat Paw Tissue

Xing Dai12AE*, Meihuizi Ding13AB, Wei Zhang13AE, Zihua Xuan13BC, Juan Liang13AE, Dongping Yang13BD, Qiying Zhang13BC, Bo Su13B, Housheng Zhu13BD, Xiaoyi Jia13AFG

DOI: 10.12659/MSM.916977

Med Sci Monit 2019; 25:7958-7965

Abstract

BACKGROUND: Er-Miao-San (EMS) is used in traditional Chinese medicine. This study aimed to investigate the effect of different elution fractions of EMS on acute inflammation induced by carrageenan in the rat paw and the possible mechanisms of action.

MATERIAL AND METHODS: Different aqueous fractions of EMS added to an AB-8 macroporous resin column and eluted with 0, 30%, 60%, and 90% ethanol. The content of berberine was evaluated by ultra-performance liquid chromatography (UPLC). Following injection of carrageenan and elution fractions of EMS into the rat paw, the volume of edema, levels of prostaglandin E2 (PGE2), tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, and IL-10 in the rat tissue were quantified by enzyme-linked immunosorbent assay (ELISA). Myeloperoxidase (MPO) activity and nitric oxide (NO) levels were measured by spectrophotometry.

RESULTS: The 60% and 90% ethanol elution fractions of EMS contained berberine, and both inhibited edema after carrageenan injection, with inhibitory rates of 31.04–40.86% and 48.84–52.18%, respectively, and with a significant reduction in MPO activity and NO production. The 60% ethanol elution fraction of EMS significantly decreased IL-1β levels and increased IL-10 levels, and the 30%, 60%, and 90% ethanol EMS elution fractions considerably reduced the levels of TNF-α. The 60% and 90% ethanol EMS elution fractions significantly reduced PGE2 levels in the rat paw.

CONCLUSIONS: The 60% and 90% ethanol elution fractions of EMS had an anti-inflammatory effect following injection of carrageenan in the rat paw.

Keywords: Antirheumatic Agents, Nitric Oxide Synthase, Anti-Inflammatory Agents, Berberine, Carrageenan, Dinoprostone, Drugs, Chinese Herbal, Edema, Foot, Hindlimb, Interleukin-10, Nitric Oxide

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750