p38MAPK对肉豆蔻提取物干预的小胶质细胞CREB表达的影响

目的探讨肉豆蔻提取物对鼠性小胶质BV2细胞的调控作用。方法应用WST-8试剂盒和Westernblot技术,观察肉豆蔻提取物对体外培养的鼠性小胶质BV2细胞的生存率及脂多糖（LPS）诱导的p38MAPK、磷酸化p38MAPK和cAMP应答元件结合蛋白（CREB）表达的影响。结果肉豆蔻提取物对BV2细胞无毒性,且抑制LPS所诱导的磷酸化p38MAPK和CREB的表达。结论肉豆蔻提取物可抑制LPS所诱导的小胶质细胞p38MAPK磷酸化和CREB的表达。     

用彗星试验研究饮用水中有机提取物对小鼠睾丸细胞DNA的损伤作用

目的通过彗星试验探讨饮用水两种不同消毒工艺所产生的非挥发性有机提取物对小鼠睾丸细胞DNA的损伤作用。方法设对照组,低、中和高剂量组共4个组,采用彗星试验检测NZ和XC水厂丰水期和枯水期水源水、自来水水样的非挥发性有机提取物对小鼠睾丸细胞DNA的损伤,并进行比较。结果各剂量组都出现了明显的拖尾现象,NZ与XC水厂的拖尾率比较差异无统计学意义。各剂量组的平均尾长明显高于对照组,NZ水厂低剂量组中,枯水期水源水平均尾长(19.3±2.7)μm高于自来水的(16.0±2.5)μm;高剂量组中,丰水期水源水高于自来水。水源水中,枯水期低剂量组低于丰水期、中剂量组高于丰水期;自来水中,枯水期中剂量组低于丰水期,高剂量组高于丰水期。XC水厂低剂量组中,丰水期的水源水平均尾长(15.5±1.0)μm低于自来水的(24.9±2.6)μm,中剂量组中,枯水期水源水高于自来水。水源水中,丰水期低剂量组低于枯水期,中剂量组和高剂量组丰水期高于枯水期;自来水中,丰水期中剂量组高于枯水期。结论 NZ和XC水厂的丰水期和枯水期有机提取物均含有导致小鼠睾丸细胞DNA损伤的物质;水源水与自来水、丰水期与枯水期表现为不同程度的DNA损伤。     

A study on the protective effect of Cynodon dactylon leaves extract in diabetic rats

Objective To investigate the antidiabetic, antioxidant and hypolipidemic efficacy of Cynodon dactylon in diabetic rats. Methods The experimental rats were randomly divided into three groups: Group I: control; Group II: Alloxan diabetic, untreated; and Group III: Alloxan diabetic treated with ethanolic extract of C. dactylon leaves (450 mg/kg bw). Experimental diabetes was induced by alloxan in a single dose of 150 mg/kg bw. Results A Significant diminution of fasting blood sugar level was observed and also ...     

羊栖菜抗水产动物致病性海洋弧菌活性成分研究

目的：对大型海藻羊栖菜体内抗水产动物病原菌活性成分进行分离分析。方法：采用平板扩散法研究羊栖菜不同有机溶剂粗提物及其乙醇提取物乙酸乙酯部位的分离纯化组分对来源于不同水产养殖动物的致病性海洋弧菌的抑制作用。结果：羊栖菜提取物对多种致病性海洋弧菌具有较好的抗性,其中羊栖菜乙醇提取物的乙酸乙酯部位对源自锯缘青蟹（Scylla serrata）的溶藻弧菌（Vibrio alginolyticus）的抑制作用最明显,抑菌圈直径Φ可达21.6 mm;经色谱柱层析分离和GC-MS分析结果表明,羊栖菜乙醇提取物乙酸乙酯部位的活性物质第二次分离中的抗菌活性较强组分主要为5,5,8a-三甲基萘烷-1-酮、山菊醇,4-羟基苯甲酸、1,10-癸二醇。结论：羊栖菜体内有多种活性成分对致病性海洋弧菌具有抗性。     

In vitro differentiation of human umbilical cord mesenchymal stem cells (hUCMSCs), derived from Wharton's jelly, into choline acetyltransferase (ChAT)-positive cells

We isolated and expanded fibroblast-like cells from the Wharton's jelly of human umbilical cord successfully. Immunocytochemistry showed that they were positive for several markers of mesenchymal stem cells (CD73, CD90, and CD105) and integrin markers (CD29 and CD44), but negative for a hematopoietic cell maker (CD45) and an endothelial cell marker (CD31). Their differentiation into osteocytes and adipocytes under specific conditions indicated that they had multi-lineage differentiation potential. Therefore these results proved that the cells we obtained from Wharton's jelly were human umbilical cord mensenchymal stem cells (hUCMSCs). Using immunocytochemistry and Western blotting analysis, we found that after treatment with neuronal induction medium [NIM; consisting of brain-derived neurotrophic factor (BDNF) and low-serum media] for 14 days, hUCMSCs expressed a neuronal specific marker, microtubule associated protein 2 (MAP2), and extended neurite-like processes. After treatment with NIM, supplemented with hippocampal cholinergic neurostimulating peptide (HCNP) or rat denervated hippocampal extract [rDHE; derived from rat fimbria fornix (FF) transected hippocampus], hUCMSCs expressed choline acetytransferase (ChAT) and this action could be enhanced when cells were cultured with NIM, supplemented with HCNP and rDHE in combination. ELISA showed that these ChAT-positive cells could secrete acetylcholine (ACh). These findings indicate that hUCMSCs possess the potential of differentiation into functional ChAT-positive cells in vitro and provide a new candidate of cells for the cell transplantation to treat Alzheimer's disease (AD).     

余甘子提取物抗氧化作用研究

通过Fenton反应产生羟基自由基,光照核黄素体系产生氧自由基,以分光光度法测定余甘子提取物对羟基自由基、氧自由基的清除作用,以及对羟基自由基诱导脂质氧化的抑制作用。结果余甘子提取物对.OH的最大清除率分别为79.4%、63.2%,对脂质氧化最高抑制率为61.0%,余甘子提取物具有良好的清除自由基和抗氧化作用。     

The Effect of Garlic Extract on Expression of INFγ And Inos Genes in Macrophages Infected with Leishmania major

Background

The study was aimed to show the effect of molecular mechanism of Aqueous Garlic Extract (AGE) on expression of IFNγ and iNOS genes in Leishmania major.

Methods

Leishmania major promastigotes (MRHO/IR/75/ER) were added to the in-vitro cultured J774 cell line, the cells were incubated for 72 hours. Various concentrations of garlic extract (9.25, 18.5, 37, 74, 148 mg/ml) were added to the infected cells. MTT assay was applied for cellular proliferation. After 72 hours of incubation, supernatants were collected and total RNA was extracted from the infected cells. The express of IFNγ and iNOS genes were studied by RT-PCR method.

Results

The colorimetric MTT assay after 3 days of incubation showed cytotoxic effect of garlic extract with an IC50 of 37 mg/ml. In addition, IFNγ and iNOS genes expression by RT-PCR indicated that garlic extract lead to over expression of these genes in J774 cell line infected with L. major.

Conclusion

Garlic extract exerts cytotoxic effect on infected J774 cell line. In addition, the hypothesis that garlic can improve cellular immunity with raising the expression of IFNγ and of iNOS genes confirmed.     

正交试验优化淫羊藿的乙醇提取工艺

目的：优化淫羊霍中淫羊霍苷提取的工艺条件。方法：采用正交设计试验,以淫羊霍苷为指标,以乙醇体积分数、乙醇用量、提取时间、提取次数为影响因素,按L9（34）正交设计表安排试验。结果：淫羊霍的最佳提取工艺为50%乙醇回流提取3次,每次为药材量14倍,每次提取3h。结论：优选得到的工艺稳定可行。     

蛇六谷石油醚萃取物柱层析部位抗肿瘤活性组分再筛选

[目的]对中药蛇六谷石油醚萃取物采用硅胶柱层析后的所得组分进行体外抗肿瘤活性筛选。[方法]采用硅胶吸附层析分离技术,对蛇六谷石油醚萃取物的化学成分进行分离,应用MTT法检测各组分对HepG-2、SGC-7901及C6细胞增殖的影响。[结果]蛇六谷石油醚萃取物经硅胶柱层析分离后,得到7个组分;MTT法实验结果显示石A和石B组分对HepG-2、SGC-7901及C6细胞均有较明显的抑瘤作用,其中以石B组分抑瘤作用最强。[结论]蛇六谷石油醚萃取物经硅胶柱层析分离得7个组分中石B组分抑瘤作用最强。     

水提与醇提对竹子中愈创木酚含量的影响

目的优选竹子中有效成分愈创木酚的最佳提取溶媒。方法将新鲜竹子砍成小段,再粉碎成粗粉,加水或70%乙醇回流提取,提取液采用高效液相法测定愈创木酚含量。色谱条件为:流动相0.5%H3PO4的水溶液-乙腈(78∶22);固定相为C18柱;流速1.0 mL/min;柱温20℃;检测波长220 nm。结果醇提法愈创木酚含量略高于水提法,但无明显差异。结论水提法可以代替醇提法。