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Depression is a kind of mental illness accompanied by complex etiology and pathogenesis in clinic. With the quickening pace of circadian rhythm and increase of life pressure in modern society, the incidence of depression is increasing year by year. Nowadays, some typical antidepressant Western medicines, such as selective serotonin re-uptake inhibitors (SSRI) and tricyclic antidepressants (TCA), have been used as the main therapeutic drugs in clinic. Unfortunately, administration of these drugs will result in severe adverse reactions, slow treatments, and low cure rates, thus obviously they can not be used for a long term. Sini San, which originated from Treatise on Febrile Diseases written by Zhang zhongjing, is a prescription widely applied in clinic for curing mental illness and also a basic Chinese herbal formula for modern treatment of depression. This article would review the research progress on antidepressant effects of Sini San based on single herbs of Bupleuri Radix and Paeoniae Radix Alba, herb-pair of Bupleuri Radix-Paeoniae Radix Alba, and formula of Sini San, providing directions and ideas for future research on complicated Chinese herbal formulae.

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Ulcerative colitis is a chronic, nonspecific and complex intestinal disease. The current clinical treatment guideline of this disease recommends a variety of options with oral western medicines, such as aminosalicylic acids, glucocorticosteroids, and immunosuppressors. However, due to their unstable therapeutic effects, high toxicities, and strong drug dependence, they are not suitable for long-term administration. Baizhu Shaoyao powder, a traditional Chinese medicinal prescription, is clinically and commonly used for tonifying spleen and softening liver as well as eliminating dampness and relieving diarrhea. Recent researches suggest that Baizhu Shaoyao powder has significant effect in the treatment of ulcerative colitis. This article reviewed the research progress on the curative effect and action mechanism of Baizhu Shaoyao powder in treating ulcerative colitis, and provided the ideas and directions for its further research in future.

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An accurate and reliable method of high-performance liquid chromatographic fingerprint combining with multi-ingredient determination was developed and validated to evaluate the influence of sulfur-fumigated Paeoniae Radix Alba on the quality and chemical constituents of Si Wu Tang. Multivariate data analysis including hierarchical cluster analysis and principal component analysis, which integrated with high-performance liquid chromatographic fingerprint and multi-ingredient determination, was employed to evaluate Si Wu Tang in a more objective and scientific way. Interestingly, in this paper, a total of 37 and 36 peaks were marked as common peaks in ten batches of Si Wu Tang containing sun-dried Paeoniae Radix Alba and ten batches of Si Wu Tang containing sulfur-fumigated Paeoniae Radix Alba, respectively, which indicated the changed fingerprint profile of Si Wu Tang when containing sulfur-fumigated herb. Furthermore, the results of simultaneous determination for multiple ingredients showed that the contents of albiflorin and paeoniflorin decreased significantly (P < 0.01) and the contents of gallic acid and Z-ligustilide decreased to some extent at the same time when Si Wu Tang contained sulfur-fumigated Paeoniae Radix Alba. Therefore, sulfur-fumigation processing may have great influence on the quality of Chinese herbal prescription.

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As the smallest unit of traditional Chinese medicinal formula compatibility, herb-pair has the basic characteristic of traditional Chinese medicinal formula compatibility. In recent years, herb-pair investigation has attracted much attention, which is an indispensable part of modernization of traditional Chinese medicine. With the decrease of the efficiency in the discovery of new drug, how to discover new drugs from traditional Chinese medicinal herb-pair has also been a bottleneck for the research and development of drug. The authors reviewed the domestic and foreign literatures in the latest years and summarized the current situations and the existing problems of herb-pair study. Based on these investigations, the authors innovatively proposed a novel concept of "precision herb-pair". Difference from traditional Chinese medicinal herb-pair or formulae with extensive roles and unclear efficacies, "precision herb-pair" belongs to a developed new mini herb-pair formula with an exact treatment and a relatively clear composition based on a certain specific disease. In addition, the authors also proposed a new strategy of "herb-pair - screen of multiple constituents based on column separation and in vitro cell viability - fuzzy target recognition pharmacology - re-evaluation of precision herb-pair", and successfully applied it to the development of a precision herb-pair from Astragali Radix-Corni Fructus in treatment of diabetic nephropathy. This proposed new strategy is simple, easy to carry out, and has a wide application, and can offer references and thoughts for the modern investigation of herb-pair and the research and development of new drug.

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