Varieties and standards of Corydalis medicinal plants / 中国中药杂志

Through literature research and standard retrieval, Corydalis-derived medicinal materials, the origins, and related standards were summarized. Finally, 27 medicinal materials were screened out, involving 71 species(varieties). Among them, only 11 are recorded in Chinese Pharmacopoeia(2020), National Standard for Chinese Patent Drugs·Tibetan Medicine, Tibetan Medicine Standards, and other local standards, including Corydalis Bungeanae Herba and Corydalis Herba. The names and original plants of the medicinal materials are different in different standards, and the phenomena of "same medicinal material with different names" and "same name for different medicinal materials" are prominent. Most standards only include the traits, microscopic identification, and physico-chemical property identification, with unsound quality criteria. Thus, efforts should be made to strengthen the sorting of Corydalis medicinal plants, herbal textual research, and investigation of the resources and utilization. Moreover, via modern techniques, the chemical components and medicinal material basis of different original plants should be explored and sound quality standards should be established to improve the safety and quality of Corydalis-derived medicinal materials. Summarizing Corydalis medicinal plants, Corydalis-derived medicinal materials, and related standards, this study is expected to provide a reference for the standard formulation, quality evaluation, expansion of drug sources, and rational development and utilization of Corydalis resources.

Compatible effects of Corydalis Rhizoma and Angelicae Dahuricae Radix components on enzymatic reaction kinetics of dl-tetrahydropalmatine in rat liver microsomes / 中草药

Objective: To study the enzymatic reaction kinetics of dl- tetrahydropalmatine (TET) in total alkaloid (TA) of Corydali Rhizoma in rat liver microsomes and to investigate the compatible effects of the effective components such as coumarin (Cou) and volatile oil (VO) in Angelicae Dahuricae Radix with TA in Corydali Rhizoma on enzymatic reaction kinetics of TET. Methods: Rat liver microsomes were prepared by ultracentrifugation and the TET concentration in incubation medium was determined by HPLC. Comparative study on the enzymatic reaction kinetics of TET in each group of TA, TA-Cou, TA-VO, and TA-Cou-VO to deduce the michaelis constant (Km) and maximum reaction rate (Vmax) of TET in each group and calculate the clearance rate (CLint) of TET in each group. Results: The Km, V max, and CLint in TA group were 0.12 μmol/ (L·min·mg), 5.40 μmol/L, and 0.022 L/(min·mg), respectively; In TA-Cou group they were 0.27 μmol/(L·min·mg), 40.18 μmol/L, and 0.006 L/(min·mg), respectively; In TA-VO group they were 0.57 μmol/(L·min·mg), 22.60 μmol/L, and 0.025 L/(min·mg), respectively; In TA-Cou-VO they were 0.84 μmol/(L·min·mg), 23.25 μmol/L, and 0.036 L/(min·mg), respectively. Conclusion: The effective components of TA in Corydali Rhizoma with Cou and VO in Angelicae Dahuricae Radix could decrease CLint of TET in TA of liver.