Lin-Mei Pan

Nanjing University of Traditional Chinese Medicine, Nan-ching, Jiangsu Sheng, China

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Publications (5)4.82 Total impact

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    ABSTRACT: Resource of traditional Chinese medicine residue is an inevitable choice to form new industries characterized of modem, environmental protection and intensive in the Chinese medicine industry. Based on the analysis of source and the main chemical composition of the herb residue, and for the advantages of membrane science and technology used in the pharmaceutical industry, especially membrane separation technology used in improvement technical reserves of traditional extraction and separation process in the pharmaceutical industry, it is proposed that membrane science and technology is one of the most important choices in technological design of traditional Chinese medicine resource industrialization. Traditional Chinese medicine residue is a very complex material system in composition and character, and scientific and effective "separation" process is the key areas of technology to re-use it. Integrated process can improve the productivity of the target product, enhance the purity of the product in the separation process, and solve many tasks which conventional separation is difficult to achieve. As integrated separation technology has the advantages of simplified process and reduced consumption, which are in line with the trend of the modern pharmaceutical industry, the membrane separation technology can provide a broad platform for integrated process, and membrane separation technology with its integrated technology have broad application prospects in achieving resource and industrialization process of traditional Chinese medicine residue. We discuss the principles, methods and applications practice of effective component resources in herb residue using membrane separation and integrated technology, describe the extraction, separation, concentration and purification application of membrane technology in traditional Chinese medicine residue, and systematically discourse suitability and feasibility of membrane technology in the process of traditional Chinese medicine resource industrialization in this paper.
    05/2014; 39(9):1728-32.
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    ABSTRACT: In the principle of "correspondence of prescription and syndrome", this article focuses on key technical issues of traditional Chinese medicine (TCM) biopharmaceutis by using the integrated pharmacokinetic and pharmacodynamic model: (1) As the prescription formulation and compatibility of TCM compounds could be influential to the in vivo pharmacokinetics of chemical components of TCMs, and closely related to therapeutic and adverse effects, how to describe these actions in a biopharmaceutics model? (2) As there are differences between pharmacokinetic processes in the normal and pathological states, how to express characteristic "syndromes" in an animal model? (3) As prescriptions work to reduce and transform syndromes, how o confirm the type and amount of effective substances in case of physiological and pathological indicators and drug distribution in a dynamic corresponding state. In response to the above key issues, we proposed the TCM biopharmaceutic study model based on PK/PD. (1) The integrity of TCMs was better expressed with the effect at the core, supplemented with the component pharmacokinetics; (2) An integrated pharmacokinetic and pharmacodynamic system was established on the basis of pharmacokinetics and pharmacodynamics of many major effective components; (3) AK/PD mathematical function with the three-phase synchronous characterization of "time-concentration-effect" was established by using the data mining techniques, to explore the biopharmaceutic principle of "correspondence of prescriptions and syndromes", in which prescriptions are only required for syndromes, whereas no prescription is required in case of no syndrome.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 06/2013; 38(12):2033-8.
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    ABSTRACT: The volatile oil parts of frankincense (Boswellia carterii Birdw.) were extracted with supercritical carbon dioxide under constant pressure (15, 20, or 25 MPa) and fixed temperature (40, 50, or 60°C), given time (60, 90, or 120 min) aiming at the acquisition of enriched fractions containing octyl acetate, compounds of pharmaceutical interest. A mathematical model was created by Box-Behnken design, a popular template for response surface methodology, for the extraction process. The response value was characterized by synthetical score, which comprised yields accounting for 20% and content of octyl acetate for 80%. The content of octyl acetate was determined by GC. The supercritical fluid extraction showed higher selectivity than conventional steam distillation. Supercritical fluid-CO(2) for extracting frankincense under optimum condition was of great validity, which was also successfully verified by the pharmacological experiments.
    Journal of Separation Science 12/2012; · 2.59 Impact Factor
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    ABSTRACT: A sensitive and specific HPLC method was developed to analyze baicalin in rat plasma. The author had compared the pharmacokinetics of baicalin after oral administration of HLJDT decoction or pure baicalin in MCAO and sham-operated rats. All the rats were divided into two groups, MCAO and sham-operated rats. Each group contained two subgroups: HLJDT decoction and pure baicalin subgroup. The HLJDT subgroup oral administration of HLJDT decoction extract 10.00 g/kg according to body weight (containing baicalin 400.00 mg/kg according to body weight), the pure baicalin subgroup received a gavages at a dosage of baicalin 400.00 mg/kg according to body weight too. The pharmacokinetics parameters were analyzed by kinetica. The results indicated that the pharmacokinetics of baicalin in rat plasma was non-linear and there were significant differences between different groups. No matter in MCAO or sham-operated rats, pure baicalin had shown better absorption than HLJDT decoction. Whether administration of pure baicalin or HLJDT decoction, the MCAO rats show better, quicker absorption of baicalin than sham-operated rats. It was good for baicalin to exert pharmacological effects on healed cerebrovascular diseases. The method had been applied successfully to pharmacokinetics of baicalin in rat plasma after oral administration of pure baicalin or HLJDT decoction.
    Fitoterapia 09/2010; 81(6):490-6. · 2.23 Impact Factor
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    ABSTRACT: To study the constituents of the whole herbs of Vernonia cinerea. by bio-activity guided isolation with PC-12 model. The constituents were separated by column chromatography and the structures were elucidated by spectroscopic methods. Four compounds were identified to be (+)-lirioresinol B (1), stigmasterol (2), stigmasterol-3-O-beta-D-glucoside (3), 4-sulfo-benzocyclobutene (4), and their NGF inducing activity were also investigated. Compounds 1, 3, 4 were isolated from this genus for the first time, and compound 4 was identified as a new natural product. Compounds 1, 3, 4 showed cytotoxicity on PC-12, and compounds 2, 3, 4 showed inhibition activity. Compound 4 showed a specific effect on the survival of TrkA fibroblasts, and resulted in the inducing NGF activity.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 09/2008; 33(16):1986-8.