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  • plant cell cultures  (2)
  • Artemisia annua L.  (1)
  • Books  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 17 (1995), S. 103-112 
    ISSN: 1573-739X
    Keywords: Books ; Drug screening ; Drugs, Chinese herbal ; Education ; History of medicine ; Medicine, Chinese traditional ; Pharmacology ; Quality control ; Research
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Herbal medicine, acupuncture and moxibustion, and massage are the three major constituent parts of traditional Chinese medicine. Although acupuncture is well known in many Western countries, Chinese herbal medicine, the most important part of traditional Chinese medicine, is less well known in the West. This article gives a brief introduction to the written history, theory, and teaching of Chinese herbal medicine in China. It also describes modern scientific research into and the quality control of Chinese herbal medicines in China. Some examples of how new drugs derived from Chinese herbs have been developed on the basis of traditional therapeutic experience are presented. Finally, the situation of Chinese herbal medicine in the West is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 12 (1990), S. 169-181 
    ISSN: 1573-739X
    Keywords: Artemisia annua L. ; Artemisinin ; Biosynthesis ; Chemistry, analytical ; Clinical trials ; Pharmacology ; Sesquiterpene lactones ; Structure—activity relationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Artemisia annua L. contains artemisinin, an endoperoxide sesquiterpene lactone, mainly in its leaves and inflorescences. This compound and a series of derivatives have attracted attention because of their potential value as antimalarial drugs. In this review a survey of the currently available literature data is given. It includes phytochemical aspects, such as constituents ofA. annua, the artemisinin content during the development of the plant and its biosynthesis, isolation, analysis and stability. Total chemical synthesis of artemisinin is referred to, as well as structure—activity relationships of derivatives and simplified analogues. Pharmacological studies are summarized, including the mechanism of action, interaction of the antimalarial activity with other drugs, possible occurrence of resistance to artemisinin, clinical results, toxicological aspects, metabolism and pharmacokinetics. Finally, plant cell biotechnologyy is mentioned as a possible means to obtain plants and cell cultures with higher artemisinin contents, allowing an industrial production of pharmaceuticals containing this novel drug.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell, tissue and organ culture 38 (1994), S. 103-113 
    ISSN: 1573-5044
    Keywords: Bioconversion ; catechols ; cyclodextrins ; lignans ; plant cell cultures ; solubility enhancement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The application of cyclodextrins as precursor solubilizers in biotechnological processes, in which plant cells are involved, is new. In this paper the possibilities for cyclodextrin facilitated bioconversions by freely suspended and/or immobilized plant cells or plant enzymes are demonstrated. After complexation with β-cyclodextrin, the phenolic steroid 17β-estradiol could be ortho-hydroxylated into a catechol, mainly 4-hydroxyestradiol, by a phenoloxidase from in vitro grown cells of Mucuna pruriens. By complexation with β-cyclodextrin the solubility of the steroid increased from almost insoluble to 660 μM. In addition, by complexation with β-cyclodextrin, a solution of 3 mM coniferyl alcohol could be fed to cell cultures of Podophyllum hexandrum in order to enhance the accumulation of podophyllotoxin. Finally, the glucosylation of podophyllotoxin by cell cultures derived from Linum flavum was investigated. Four cyclodextrins: β-cyclodextrin, γ-cyclodextrin, hydroxypropyl-β-cyclodextrin and dimethyl-β-cyclodextrin were used to improve the solubility of podophyllotoxin. Dimethyl-β-cyclodextrin met our needs the best and the solubility of podophyllotoxin could be enhanced from 0.15 to 1.92 mM. Podophyllotoxin-β-d-glucoside was formed at a rate of 0.51 mmol l-1 suspension per day by the L. flavum cells growing in the presence of 1.35 mM podophyllotoxin, complexed with dimethyl-β-cyclodextrin.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Plant cell, tissue and organ culture 43 (1995), S. 117-121 
    ISSN: 1573-5044
    Keywords: bioconversion ; immobilization ; pharmaceuticals ; plant cell cultures ; plant enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plant enzymes are able to catalyze regio- and stereospecific reactions. Freely suspended and immobilized plant cells as well as enzyme preparations can therefore be applied for the production of pharmaceuticals by bioconversion, as such or in combination with chemical syntheses. This review paper deals with bioconversions of added precursors from natural or synthetic origin by several biocatalytic systems.
    Type of Medium: Electronic Resource
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