余甘子功能食品的开发及其类SOD活力测定

余甘子是一种具有较高的食用和药用价值的野生植物资源，风味独特，含有丰富的类SOD活性物质和其他多种具有生物活性的物质，具有清除自由基、抗肿瘤、抗衰老等保健作用。作者提出了余甘予保健口服液的生产工艺流程及配方，并采用改良的Marklund方法测定了类SOD的活力，结果较为满意。     

高效液相色谱法测定叶下珠中没食子酸的含量

以高效液相色谱法测定叶下珠中没食子酸的含量。采用YWG C18( 10 μm)色谱柱 ,甲醇—水—磷酸 ( 4∶ 96∶ 0 0 5)为流动相 ,测得叶下珠中没食子酸的含量为 0 114% ,平均回收率为 10 3.1%。测定方法快速、灵敏 ,具有实用价值     

叶下珠化学成分及其抗乙肝病毒活性的研究

对大戟科叶下珠属植物叶下珠的干燥全草进行了化学成分及其抗乙肝病毒活性的研究，共分得１１个化合物，其中２个新化合物为去氢诃子次酸甲酯、短叶苏木酚酸甲酯。通过抗病毒、抗乙肝表面抗原及保肝试验，肯定了叶下珠的抗乙肝病毒活性。     

福建叶下珠抗小鼠免疫性肝损伤的实验研究

目的评价福建叶下珠对小鼠免疫性肝损伤的保护作用.方法48只NIH小鼠随机分为叶下珠高、低剂量组、联苯双酯组、正常对照组及模型组.于造模之日起,叶下珠高、低剂量组分别以20 g/kg、10 g/kg叶下珠药液灌胃,联苯双酯组以0.15 g/kg联苯双酯药液灌胃,正常对照组及模型组每天给予等量生理盐水.每天灌胃1次,连用12 d.检测血清谷丙转氨酶(ALT)和肝、脾脏器指数,并做肝脏病理学检查.结果联苯双酯组、叶下珠高、低剂量组小鼠血清ALT、肝指数、脾指数值较模型组有不同程度的改善(P＜0.05,P＜0.01).炎症坏死程度:5组间比较,差异有非常显著性意义(P＜0.005);模型组与正常组、联苯双酯组、福建叶下珠高、低剂量组与模型组间两两比较,差异有显著性意义(P值均＜0.05);联苯双酯组与福建叶下珠大、小剂量组间比较,差异无显著性意义(P＞0.05).结论福建叶下珠能显著降低血清转氨酶活力和肝脾脏器指数,对肝细胞坏死有一定的改善作用,具有较好的抗小鼠免疫性肝损伤作用.     

RP-HPLC测定黄珠子草中短叶苏木酚的含量

目的:建立高效液相色谱法测定黄珠子草中短叶苏木酚的含量。方法:以 Thermo Hypersil-Keystone ODS C_(18)为分析柱,甲醇-1%醋酸(36:64)为流动相,流速1.0mL·min~(-1),检测波长278nm,采用外标法定量测定。结果:短叶苏木酚在10～100μg·mL~(-1)范围内线性关系良好(r=0.999 7);其平均回收率为98.77%,RSD 为0.98%(n=6)。结论:该方法简便可靠,快速,重现性好,可用于黄珠子草中短叶苏木酚的含量测定。     

Potato Disc Bioassay for Some Jordanian Medicinal Plants

Fifteen different plants representing different species, genera and families were used to test the effect of their aqueous extracts on tumor inhibition with a rapid, inexpensive, safe, animal sparing technique, and statistically reliable prescreen for in vivo murine leukemia antitumor activity, which is known as potato disc technique. The inoculum used contains the extract with the bacterium (Agrobacterium tumefaciens) that was known to cause crown gall tumor to different plant species especially dicotyledons and some gymnosperms. After 12 to 21 days of incubation the tumors appeared and were counted, and the maximum inhibition was then calculated. Thirteen species out of fifteen showed a good antitumor effect, and three of them showed a maximum inhibition of 80%. More experiments are necessary to determine the exact mechanism of action.     

Molecular Docking Studies of Phytocompounds from the Phyllanthus Species as Potential Chronic Pain Modulators

The study of inflammatory pain has been one of the most rapidly advancing and expanding areas of pain research in recent years. Studies from our lab have demonstrated the chronic pain-modulating potential of the Phyllanthus species and their probable interaction with various inflammatory mediators involving enzymes like COX-2 and PGE synthase, cytokines like TNF-alpha and IL-1 beta, and with the NMDA receptor. Inflammatory mediators which play a crucial role in chronic inflammatory hyperalgesia and its subsequent modulation were selected for their interactions with 86 structurally diverse phytoconstituents identified from the Phyllanthus species.The docking analysis of the target proteins with the phytochemical ligands was performed using VLifeMDS software. The docking scores and analysis of the interactions of the phytocompounds with target proteins suggest that important molecules like lupeol, phyllanthin, hypopyllanthin, corilagin, epicatechin, and most of the other compounds have the ability to bind to multiple targets involved in inflammatory hyperalgesia.Our study strongly suggests that the findings of the present study could be exploited in the future for designing ligands in order to obtain novel molecules for the treatment and management of chronic pain.     

Evaluation of Antiviral Activities of Four Local Malaysian Phyllanthus Species against Herpes Simplex Viruses and Possible Antiviral Target

Nucleoside analogues such as acyclovir are effective antiviral drugs against herpes simplex virus infections since its introduction. However, with the emergence of acyclovir-resistant HSV strains particularly in immunocompromised patients, there is a need to develop an alternative antiherpetic drug and plants could be the potential lead. In this study, the antiviral activity of the aqueous extract of four Phyllanthus species were evaluated against herpes simplex virus type-1 (HSV-1) and HSV-2 in Vero cells by quantitative PCR. The protein expressions of untreated and treated infected Vero cells were studied by 2D-gel electrophoresis and Western blot. This is the first study that reported the antiviral activity of P. watsonii. P. urinaria was shown to demonstrate the strongest antiviral activity against HSV-1 and HSV-2, with SI >33.6. Time-of-addition studies suggested that the extract may act against the early infection stage and the replication stage. Protein expression studies indicated that cellular proteins that are involved in maintaining cytoskeletal structure could be potential target for development of antiviral drugs. Preliminary findings indicated that P. urinaria demonstrated potent inhibitory activity against HSV. Hence, further studies such as in vivo evaluation are required for the development of effective antiherpetic drug.     

叶下珠对小鼠酒精性肝损伤的保护作用

目的研究叶下珠对小鼠酒精性肝损伤的保护作用。方法将30只小鼠随机分为3组:空白对照组小鼠每日以常规饲料和自来水喂养;酒精损伤组小鼠每日以白酒连续灌胃,常规饲料中拌有白酒;叶下珠保护组小鼠将白酒加浓度70%的叶下珠提取液按酒精损伤组动物灌胃。4周后,处死小鼠,取小鼠血清和肝脏测定ALT、AST、MDA、SOD等指标。结果叶下珠处理能够抑制血清谷草转氨酶(AST)、谷丙转氨酶(ALT)和肝脏的丙二醛(MDA)上升,其AST、ALT和MDA值比酒精损伤组分别下降了52.5%、41.4%和29.3%。同时叶下珠也能提高超氧化物歧化酶(SOD)的活性,处理后SOD值上升了16.3%。结论叶下珠对小鼠酒精性肝损伤有明显的保护作用。     

余甘子治疗糖尿病及其并发症的研究进展

糖尿病是一种严重威胁人类健康的常见疾病,糖尿病并发症则是导致糖尿病致死率增高的主要原因。研究表明余甘子具有调节免疫、抗氧化等多种生物活性,能够降低血糖,促进胰岛素的分泌,对糖尿病及糖尿病神经病变、糖尿病心血管并发症、糖尿病视网膜病变、糖尿病肾病、降低糖尿病引起的消耗等都有肯定的治疗作用。本文就余甘子在治疗糖尿病及其并发症方面的研究进展进行综述。