红丝线总提取物对大鼠血液流变学的影响

目的:观察红丝线总提取物对大鼠血液流变学及血栓形成的影响。方法:以肾上腺素和冰水刺激的方法观察红丝线总提取物对大鼠血液流变学的影响,以颈动-静脉旁路方法观察红丝线总提取物对实验性血栓形成的作用。结果:红丝线总提取物灌胃给药能有效降低血瘀大鼠多项血液流变学指标,且能明显减小血栓湿重。结论:红丝线总提取物具有改善血液流变学指标、抑制血栓形成作用。     

特色壮药材罗汉茶质量标准研究

目的:提高和完善广西特色壮药罗汉茶药材质量标准。方法:建立槲皮苷的TLC鉴别法及落新妇苷HPLC含量测定方法。结果:药材的薄层色谱斑点清晰,专属性强;落新妇苷在0.07812-0.7812μg内线性关系良好,平均加样回收率为107.82%,RSD%=3.38%。结论:提高和完善后的质量标准可以更全面有效地控制罗汉茶药材的质量。     

黄杞叶黄酮类成分的研究

目的 研究黄杞叶中的黄酮类成分。方法 综合采用硅胶、Sephadex LH-20柱色谱及制备型高效液相色谱法,对黄杞叶中的黄酮类成分进行分离纯化,根据理化性质并结合UV、HPLC/Q-TOF-ESI-MS、1H-NMR、13C-NMR、DEPT、HMBC数据及文献进行结构鉴定。结果 分得了6个化合物,分别鉴定为落新妇苷(化合物Ⅰ)、黄杞苷(化合物Ⅱ)、槲皮苷(化合物Ⅲ)、(2R, 3R)5, 7, 3', 4'-四羟基二氢黄酮-3-氧-α-L-鼠李糖(3→1)-β-D-葡萄糖苷(化合物Ⅳ)、(2R, 3R)5, 7, 4'-三羟基二氢黄酮-3-氧-α-L-鼠李糖(3→1)-β-D-葡萄糖苷(化合物Ⅴ)、(2R, 3R)-5, 7, 4', 5'-四羟基二氢黄酮-3-氧-(3"-氧-没食子酰基)-α-L-鼠李糖苷(化合物Ⅵ)。结论 化合物Ⅴ为首次从该植物中得到,也是新化合物。     

红丝线中两个新化合物的结构鉴定

目的：分离鉴定红丝线(Peristrophe roxburghian)地上部分的化学成分。方法：红丝线的地上部分经60%乙醇提取,硅胶和氧化铝柱色谱分离,经化学和UV,IR,NMR及MS光谱解析确定结构。结果：分得两个化合物,经鉴定化合物I为5,6-dimethoxy-2(3H)-benzoxazolone,化合物II为2-amino-7,8-dimethoxy-3H-phenoxazine-3-one。结论：两个化合物均为新化合物,分别命名为红丝线酰胺(peristrophamide, I)和红丝线素peristrophine, II)。     

红丝线草提取物对胰岛素抵抗性脂肪肝大鼠肝脏保护作用的研究

目的：研究红丝线草Peristrophe roxburghiana提取物(HSX)对胰岛素抵抗性脂肪肝大鼠肝脏的保护作用。方法：采用高脂高糖饮食建立胰岛素抵抗脂肪肝动物模型,并预防性给予HSX高(合生药1.14 g·kg^-1)、低(合生药0.38 g·kg^-1)剂量处理8周。8周后,处死大鼠,取血测定FFA,TC,TG,HDL-C和LDL-C水平；测定FBG和FINS,并计算ISI；测定AST和ALT活性,并取全肝称重,计算肝指数,同时测定肝组织中SOD,CAT 和GSH-PX活性以及MDA含量；取肝左叶相同部位组织,常规HE染色,光镜下评估肝脏组织脂肪变性的程度。结果：HSX可明显降低模型大鼠血浆FFA和TG水平,提高血浆HDL-C水平；降低ALT和AST活性,降低肝指数,防止肝脏组织脂肪性病变；降低血中胰岛素水平和提高胰岛素敏感指数；同时,明显提高肝脏组织中SOD,CAT和GSH-PX活性,降低MDA含量。结论：HSX对高脂高糖饮食引起的胰岛素抵抗脂肪肝大鼠具有调脂保肝作用,其作用机制可能与其提高肝脏组织抗氧化能力有关。     

红丝线草保肝护肝活性部位的筛选

目的：研究红丝线草保肝护肝的活性部位。方法：对红丝线草的乙醇提取物进行萃取分离，分成4个极性部位，用大鼠D-氨基半乳糖（D-GlaN）急性肝损伤模型确定红丝线草保肝护肝的活性部位。结果：大鼠口服红丝线草正丁醇部位的高、低剂量组（I、J）均可明显抑制大鼠血清中ALT、AST的升高（P＜0.05），且其作用与阳性对照药相比差异无显著性。结论：正丁醇部位为红丝线草保肝护肝的活性部位。     

红丝线草对胰岛素抵抗脂肪肝大鼠有关指标的影响

目的:观察红丝线草提取物(Peristrophe roxburghiana,HSX)对胰岛素抵抗脂肪肝大鼠胰岛素敏感性、血脂和肝脏功能的影响。方法:采用高脂高糖饮食建立胰岛素抵抗脂肪肝动物模型,并连续8周预防性灌胃给予HSX处理。8周后测定糖耐量,处死大鼠,取血测定FFA、TC、TG、HDL-C、LDL-C、AST、ALT、FBG和FINS,并计算ISI;取全肝称重,计算肝指数;取肝左叶相同部位组织,常规HE染色,光镜下评估肝组织脂肪变性的程度。结果:HSX高、低剂量处理后,模型组大鼠空腹血清胰岛素,血浆FFA、TG水平基本恢复正常,并提高血浆HDL-C水平,降低ALT和AST活性,降低肝指数,防止肝组织脂肪性病变;同时,低剂量的HSX可增加胰岛素敏感性,改善糖耐量。结论:HSX对高脂高糖饮食引起的胰岛素抵抗脂肪肝大鼠具有调脂保肝作用,其作用可能与提高胰岛素敏感性有关。     

高效液相色谱法测定罗汉茶中落新妇苷的含量

目的建立高效液相色谱测定药材罗汉茶中落新妇苷含量的方法。方法选用色谱柱为L ichrospher C-18(4.6 mm×250 mm,5μm);流动相为甲醇-0.3%醋酸水溶液(v/v,45∶55);检测波长291 nm;流速1.0 mL.m in-1;柱温25℃。结果落新妇苷进样量在0.182~1.093μg范围内与峰面积呈良好线性关系(r=0.9995,n=6);落新妇苷的加样回收率为98.60%(RSD=2.49%)。结论该法简便、准确、可靠,可用于罗汉茶药材的质量控制。     

Anti-trypanosomal effect of Peristrophe bicalyculata extract on Trypanosoma brucei brucei-infected rats

Objective

To investigate the in vitro and in vivo effect of whole plant extracts of Peristrophe bicalyculata on Trypanosoma brucei brucei-infected rats.

Methods

The experiment was divided into two phases: In the first phase, the anti-trypanosomal activity of the hot water, cold water, methanol and butanol extracts of the whole plant were determined by incubating with Trypanosoma brucei brucei. The cold water extract was partially-purified and the anti-trypanosomal activity of the fractions determined. In the second phase, Trypanosoma brucei brucei-infected rats were treated with fraction 2c for nine days. Packed cell volume (PCV), high density lipoprotein (HDL), low density lipoprotein (LDL), total cholesterol (TC), triacylglycerol (TAG), aspartate aminotransferase, alanine aminotransferases (ALT), alkaline phosphatase (ALP), total and direct bilirubin levels were determined at the end of the experiment.

Results

Cold water extract immobilized 90% of the parasites after 60 min of incubation, and fraction 2c completely immobilized the parasites after 35 min. It significantly increased PCV in Trypanosoma brucei brucei-infected rats. Decreased TC, TAG, HDL and LDL levels of infected rats increased significantly when rats were treated with the fraction, while elevated levels of total bilirubin and ALT also decreased. The difference in urea, direct bilirubin and ALP was not significant when infected rats were compared to rats in other groups.

Conclusions

The ability of the plant to ameliorate the infection-induced biochemical changes calls for detailed investigation of the potentials of the plant for antitrypanosomiasis drug delivery.     

Antitumor activity of Sansevieria roxburghiana rhizome against Ehrlich ascites carcinoma in mice

Context: Sansevieria roxburghiana Schult. & Schult. f. (Agavaceae) is a herbaceous perennial plant traditionally used for coughs, rheumatism; as an expectorant, febrifuge, purgative, and tonic.

Objective: To evaluate the hydroalcoholic extract of S. roxburghiana rhizome (HASR) for antitumor activity against Ehrlich ascites carcinoma (EAC) in Swiss albino mice.

Methods: Twenty-Four hours after intraperitoneal inoculation of tumor (EAC) cells in mice, HASR was administered at 50 and 100?mg/kg body weight for nine consecutive days. On day 10 half of the mice were sacrificed and rest were kept alive for assessment of increase in life-span. The antitumor effect of HASR was assessed by evaluating tumor volume, packed cell count, viable and non-viable tumor cell count, median survival time and increase in life-span of EAC bearing hosts. Hematological profiles and serum biochemical parameters were estimated. Further, antioxidant properties were assessed by estimating lipid peroxidation, reduced glutathione (GSH), superoxide dismutase (SOD) and catalase (CAT).

Results and discussion: HASR showed a significant (p < 0.001) decrease in tumor volume, packed cell volume and viable cell count and increased the life span of EAC bearing mice. Hematological and serum biochemical profiles were restored to normal levels in HASR treated mice as compared to EAC control. HASR treatment significantly (p <0.001) decreased lipid peroxidation and recovered GSH, SOD and CAT towards normal as compared to EAC control.

Conclusion: The present study demonstrates that S. roxburghiana rhizome exhibited remarkable antitumor activity in Swiss mice that is plausibly attributable to its augmenting endogenous antioxidant mechanisms.