Pharmacological Investigation of “Meridian Tropism” in Three “Shen” Chinese Herbs

• 作者: Hoi-Yan Leung Kam-Ming Ko Pou-Kuan Leong Wing-Man Chan
• 来源期刊: 中医(英文)
• 学科: 医学
• 关键词: CODONOPSIS RADIX GINSENG RADIX Panacis Qinquifolii RADIX ATP-Generation Capacity SPLENOCYTE Proliferation
• 年，卷（期）: zyyw_2019,（4）
• 页码范围: 121-135
• 页数: 15页
• 分类号: R28

摘要

“Meridian tropism” refers to the organ-specific biological action(s) produced by a Chinese herb following its oral administration, which is analogous to the concept of “bioavailability” in Western medicine. In this study, we compared the in vitro and ex vivo pharmacological actions of three herbs [namely, Dangshen (DS, Codonopsis Radix), Ranshen (RS, Ginseng Radix) and Xiyangshen (XYS, Panacis Qinquifolii Ra-dix)] to validate their meridian tropism. We compared the in vitro and ex vivo pharmacological actions [i.e. the ability to increase splenocyte proliferation and adenosine triphosphate-generation capacity (ATP-GC)] of the ethanolic extracts of DS, RS and XYS to validate their meridian tropism. Results showed that DS, RS and XYS (at 30 - 300 μg/mL) can both stimulate the proliferation of primary mouse splenocytes in vitro and increase adenosine triphosphate-generation capacity (ATP-GC) in cultured Caco 2 colon epithelial cells in vitro. Interestingly, oral administration of DS and RS (but not XYS, at 3 and 6 g/kg/day × 3 consecutive days) was found to stimulate the proliferation of splenocytes ex vivo at 24 h post-treatment in mice. Similarly, DS and RS (but not XYS) increased the ATP-GC of mitochondrial fractions isolated from a small segment of mouse intestine at 48 h post-treatment. This observation is consistent with the meridian tropism of the pharmacological action of “Shen”, i.e., the accessibility of DS and RS (but not XYS) to the “Spleen” meridian. The comparison between the results obtained from in vitro and in vivo/ex vivo bioassays may offer a potential method for assessing meridian tropism in Chinese herbs.