Songsong Jing

The effect of different extraction techniques on property and bioactivity of polysaccharides from Dioscorea hemsleyi

The rhizoma of Dioscorea hemsleyi (DH) has been used as a treatment of diabetes in China for hundreds of years. Polysaccharides in DH were extracted by using ultrasonic-assisted extraction (UAE), cold water extraction (CWE), warm water extraction (WWE) and hot water extraction (HWE), separately. Then the different characterizations of four DH polysaccharide (DHP) samples were analyzed by high-performance liquid chromatography (HPLC), high-performance Gel permeation chromatography (HGPC), ultraviolet-visible spectroscopy(UV), fourier transform-infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Their activities in vitro of DHP were compared. Experimental results showed that HWE had the highest yield and large molecular weight. CWE had the highest uronic acid yield and little molecular weight, and its DPPH, AGI and AAI activity were the best. The molecular weight of UAE was small, and its RP and FRAP activity were the best. Four DHP samples had differences in the surface topography, while they all had the typical IR spectra characteristic of polysaccharides. According the correlation analysis, it showed that the more uronic acid and the lower molecular weight was, the higher the antioxidant activity was. The high content of monosaccharide composition of Xyl, Ara, GlcA and GalA, and little molecular weight have good effect on antidiabetic activity.

Correlation among cytotoxicity, hemolytic activity and the composition of steroidal saponins from Paris L.

ETHNOPHARMACOLOGICAL RELEVANCE Cytotoxicity and hemolysis of saponins were the characteristic activities. Many researches have been devoted to the synthesis of saponins devoid of the hemolysis by structure-activity relationship studies. However, saponins contained in the plants were not fully researched on the two activities such as Parissteroidal saponins. Paris steroidal saponins as the active compounds of Paris plants have multiple effects. MATERIALS AND METHODS In the present study, we investigated the cytotoxicity and hemolytic activity of Paris plants collected from twelve places in China. The contents of nine known steroidal saponins in the plants were determined simultaneously using HPLC-ELSD method. The two activities are not related to the contents of saponins. RESULTS As the results of hemolysis of saponins shown, the hemolysis was positive related to the sugar chain. The membrane toxicity suggested that the integration of saponins with the membrane in erythrocyte was correlated to the kinds of saponins and the hemolysis of disosgenyl saponins were stronger than that of pennogenyl glycosides. CONCLUSIONS These results provided information about the hemolysis and cytotoxicity of Paris steroidal saponins, which may be useful for their synthesis devoid of hemolysis toxicity.

Chemical constituents and antitumor activity from Paris polyphylla Smith var. yunnanensis

Abstract Eleven compounds were isolated from the rhizomes of Paris polyphylla Smith var. yunnanensis. Their structures were elucidated on the basis of rigorous 1D and 2D NMR experiments as well as comparison with the literature data. To the best of our knowledge, compound 1 was only predicted by UPLC/Q-TOF MSE and the NMR spectroscopic data was given for the first time. The cytotoxic activities of all compounds on mouse B16 cells were evaluated. Among the tested molecules, compounds 6–9 showed strong cytotoxicities, while compound 1 did not show significant effect.

Chemical constituents of plants from the genus Paris.

by Jin-Chao Weia)b), Wen-Yuan Gao*a), Xiao-Dan Yanb), Ying Wangb), Song-Song Jinga), and PeiGen Xiaoc) a) School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China (phone: þ86-22-87401895; fax: þ86-22-87401895; e-mail: biochemgao@163.com) b) School of Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, P. R. China c) Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100094, P. R. China

Study on hemostatic activities of the rhizome of Paris bashanensis

Abstract Context. Paris bashanensis Wang et Tang (Liliaceae) is widely used in traditional Chinese medicine for the treatment of injuries, fractures and hemorrhage in Hubei and Sichuan Province. Objective: The n-BuOH extract of Paris bashanensis was investigated for hemostatic activity and chemical constituents in order to provide a basis for the application in folk use. Materials and methods: The n-BuOH extract of P. bashanensis was divided into three eluents (30, 50 and 70% EtOH) by macroporous adsorptive resin D101. The bleeding time of breaking tail hemostasis and clotting time of capillary and slide method in mice were used extensively to screen the hemostasis properties after repetitive administration of these three fractions (100 mg/kg, 50 mg/kg) for 5 days (total of 5 times, once per day). The chemical compounds were analyzed by HPLC-UV. Results: The inhibition rates in the bleeding time of 70, 50 and 30% n-BuOH ext. were 45, 32 and 21%, respectively. Using the slide method the decreasing rate of the clotting time of 70, 50 and 30% n-BuOH ext. were 71, 65 and 32% and in the experiment of capillary method, the inhibition rates were 43, 31 and 24%, respectively. A total of 70% n-BuOH ext. showed a high content of the pennogenin-type saponins by HPLC-UV. Discussion and conclusions: The 70% n-BuOH ext. of P. bashanensis was found to contain high levels of pennogenin saponins, which may lead to a higher hemostatic activity. Combined with the hemostatic test, P. bashanensis could be used as a resource of hemostatic drug.