Background: Quality control of Traditional Chinese Medicines (TCMs) has improved greatly, but there is still a lack of a convincing quality evaluation system for TCMs. Developing quality control markers of TCMs based on pharmacodynamics instead of content has been an attractive approach. However, on account of neglecting phytochemistry attributes of TCMs, part of effective markers might be short of specificity and inconvenient for detecting in production manufacture, which is adverse to control the quality of TCMs systematically.
Purpose: To build a novel and multidimensional quality assessment approach for TCMs based on pharmacodynamics and chemical properties.
Methods: Schisandra chinensis (Turcz.) Baill (S. chinensis) was used as an example and a rat depression model was built by using a chronic unpredictable mild stress procedure. For identifying the antidepressive components of S. chinensis, we elucidated its antidepressant mechanism in first-step by using quantitative RT-PCR and immunoblotting techniques. And accordingly, correlation analysis between ingredients in vivo with target proteins and anti-inflammation experiments in vitro were carried out. On the other hand, HPLC fingerprint combinations with diverse chemometrics methods were applied to analyze 14 preparations of S. chinensis to obtain its characteristic chemical information. Finally, we ascertained the quality control markers of S. chinensis by integrating the efficacious and characteristic constituents.
Results: Our research indicated that S. chinensis treated depression by relieving disordered monoaminergic system and ameliorating neuroinflammation. Five effective substances (schisandrol A, schisandrin A, gomisin N, schisandrin B, and schisandrin C) were screened out according to their potential anti-depression efficacy. Besides, 21 common ingredients and 4 representative constituents of S. chinensis were identified by chemical analysis, whereas only 2 characteristic quantitative markers (schisandrol A, schisandrol B) were ultimately ascertained based on previous studies.
Conclusion: 6 components, schisandrol A, schisandrin A, gomisin N, schisandrin B, schisandrin C, and schisandrol B, possessed efficacy, measurability, and specificity, were selected as the comprehensive markers for quality control of S. chinensis. We proposed a multidimensional strategy for identifying comprehensive quality markers for TCMs in this study.
Keywords: Chemical properties; Pharmacodynamics; Quality control markers; Schisandra chinensis (Turcz.) Baill; TCMs.
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