Dehydrocorydaline Accounts the Majority of Anti-Inflammatory Property of Corydalis Rhizoma in Cultured Macrophage

Xiangpeng Kong; Zhicong Chen; Yingjie Xia; Etta Y L Liu; Haiqin Ren; Cheng Wang; Winnie W H Hu; Tina T X Dong; Rongbiao Pi; Karl W K Tsim

doi:10.1155/2020/4181696

Dehydrocorydaline Accounts the Majority of Anti-Inflammatory Property of Corydalis Rhizoma in Cultured Macrophage

Evid Based Complement Alternat Med. 2020 Nov 17:2020:4181696. doi: 10.1155/2020/4181696. eCollection 2020.

Authors

Xiangpeng Kong^{1

2}, Zhicong Chen^{1

3}, Yingjie Xia^{1

3}, Etta Y L Liu^{1

3}, Haiqin Ren^{1

3}, Cheng Wang^{1

3}, Winnie W H Hu^{1

3}, Tina T X Dong^{1

3}, Rongbiao Pi⁴, Karl W K Tsim^{1

3}

Affiliations

¹ Shenzhen Key Laboratory of Edible and Medicinal Bioresources, HKUST Shenzhen Research Institute, Hi-Tech Park, Shenzhen 518057, China.
² Institute of Pharmaceutical and Food Engineering, Chinese Medicine Master Studio of Wang Shimin, Shanxi University of Chinese Medicine, 121 Daxue Road, Yuci District, Jinzhong 030619, China.
³ Division of Life Science and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
⁴ School of Medicine, Sun Yat-Sen University, Guangzhou 510006, China.

Abstract

Corydalis Rhizoma (CR) is a commonly used traditional Chinese medicine for its potency in activating blood circulation and analgesia. In clinic, CR extracts or components are commonly used in the treatment of myocardial ischemia, rheumatism, and dysmenorrhea with different types of inflammation. However, due to different mechanism of pain and inflammation, the anti-inflammatory property of CR has not been fully revealed. Here, the major chromatographic peaks of CR extracts in different extracting solvents were identified, and the anti-inflammatory activities of CR extracts and its major alkaloids were evaluated in LPS-treated macrophages by determining expressions of proinflammatory cytokines, IκBα and NF-κB. The most abundant alkaloid in CR extract was dehydrocorydaline, having >50% of total alkaloids. Besides, the anti-inflammatory activities of dehydrocorydaline and its related analogues were demonstrated. The anti-inflammatory roles were revealed in LPS-treated cultured macrophages, including (i) inhibiting proinflammatory cytokines release, for example, TNF-α, IL-6; (ii) suppressing mRNA expressions of proinflammatory cytokines; (iii) promoting IκBα expression and suppressing activation of NF-κB transcriptional element; and (iv) reducing the nuclear translocation of NF-κB. The results supported that dehydrocorydaline was the major alkaloid in CR extract, which, together with its analogous, accounted the anti-inflammatory property of CR.