ABSTRACT
Objective: To establish a new method for the quantitative analysis of multi-components by single-marker (QAMS) to simultaneous determine six naphthoquinone components in Arnebia euchroma. Methods: The chromatographic peaks of the main naphthoquinone components in A. euchroma were identified by high resolution LC-MS. The acetyl Shikonin was used as internal marker to calculate the relative correlation factors (RCF) of deoxyshikonin, isobutyrylshikonin, β-acetoxyisovalerate shikonin, and β,β'-dimethylacryloyl shikonin by HPLC, and examine the durability and reproducibility of the RCF. The external standard method and QAMS were compared to determine the six components in A. euchroma. Results: The repeatability of RCF was good. The results calculated with QAMS were consistent with the results by the external standard method. Conclusion: The QAMS method for simultaneously measuring the content of six components is accurate and reliable to evaluate the quality of A. euchroma.
ABSTRACT
Objective: By examining the secondary metabolites content changes of the low temperature stressed Arnebia euchroma suspension cells to explore the effects of unique environmental factors in genuine regional areas on A. euchroma in non-genuine regional areas. Methods: After stressing A. euchroma suspension cells for 24 h at 4 ℃, rosmarinic acid, lithospermum acid, shikonofuran A, shikonofuran E, acetylshikonin, deoxyshikonin, β,β'-dimethylacryl shikonin, isovalerylshikonin, and total shikonin compounds were measured by HPLC on six time points, one of which was before the stress and counted as 0 h, and others were in 12, 24, 48, 72, and 168 h after the stress. Results: The results showed that the different time points after low temperature stress, similar compounds had the same consistent change trends basically. However, the contents had significant differences. In addition to DAS, the maximum value of all the chemical ingredients were in low stress group. Conclusion: Low temperature stress can promote the accumulation of secondary metabolites in A. euchroma suspension cells, and have an important role in revealing the mechanism of the formation of its genuineness.
ABSTRACT
OBJECTIVE: To establish a new chromatography technique to, separate and purify naphthaquinone components from rhizoma of Arnebia euchroma(Royle). METHODS: Medium and low pressure preparative chromatography and Flash column were used to separate and purify the constituents, and their structures were elucidated by physicochemical properties, IR, MS, 1H-NMR and C-NMR. RESULTS: Six monocases were obtained, which were deoxyshikonin, shikonin, isobutylshikonin, acetylshikonin, β-ace-toxyisovalerylshikonin, and β, β-dimethylacrylshikonin. The purities of the 6 compounds analyzed by HPLC were 99.62%, 99.02%, 99.5%, 99.31%, 99.3% and 99.2%, respectively. CONCLUSION: A medium and low pressure preparative chromatography method has been established for the first time which can accurately and rapidly separate monocases from herbs.
ABSTRACT
In this report, we describe the cases recovering from oral candidosis by treatment with oral ointment containing antifungal naphthoquinone derivatives. The patients bearing persistent colonization with Candida genera were treated with our domestic oral ointment, three times a day for two weeks or for one month. During the observation period, the oral candidosis was gradually vanished at 3 days after the treatment and disappeared completely at the end of the period. This ointment contains naphthoquinone derivatives, which are constituents of Shikon (root of <i>Lithospermum erythrorhizon</i>), having been investigated against several fungal pathogens. When the biological activity of these compounds was tested against fungi, a wide range of sensitivity was recorded. With the determination of these naphthoquinones by HPLC, this ointment contains about 10 to 100-folds of each effective concentration.<br>This observation demonstrates that the oral ointment containing some antifungal naphthoquinone derivatives would useful for the patients bearing serious oral candidosis.