In vivo study of propolis supplementation effects on antioxidative status and red blood cells

In vivo study has been conducted on 47 healthy women and men in order to investigate whether daily intake of powdered propolis extract during 30 days has any influence on the following blood parameters: activity of superoxide dismutase, glutathione peroxidase and catalase, concentration of plasma malondialdehyde, total cholesterol, low- and high-density lipoprotein cholesterol, triglycerides, glucose, uric acid, ferritin and transferrin, together with routine red blood cell parameters.

The effect of daily propolis intake seems to be time and gender related. For the men test group after the initial 15 days of propolis treatment, 23.2% (p = 0.005) decrease in concentration of malondialdehyde was observed. After 30 days of treatment, statistically significant (p = 0.010) 20.9% increase in superoxide dismutase activity and change in some of the red blood cell parameters were detected. For the women test group, the propolis treatment did not induce a change in any of the measured parameters.     

蜂胶对小鼠移植肿瘤的抑制作用

目的　探讨蜂胶对移植小鼠肿瘤的抑制作用 ,寻找最佳抑瘤搭配。方法　采用有重复的正交试验设计 ,根据正交表 L16( 4 2× 2 9)安排试验因素 ,并进行试验 ,取得试验指标数据 ,分析不同的蜂胶浓度在不同的饲喂时间对不同肿瘤的抑制作用。结果　蜂胶浓度 ( A)、饲喂时间 ( B)、对不同肿瘤细胞株 ( D)的抑瘤作用差异有显著性 ( P <0 .0 1或 P <0 .0 5 ) ,性别间 ( C)差异无显著性 ( P >0 .0 5 ) ,各显著性试验因素各水平的最优搭配为 A4 B3D2 。结论　一定浓度的蜂胶饲喂一段时间后对移植的小鼠肿瘤有显著的抑制作用。     

河南蜂胶对白色念珠菌的抑菌作用研究

目的探讨河南蜂胶对白色念珠菌的抑菌效果。方法采用琼脂平板扩散法,以白色念珠菌为实验菌种,设置不同pH平板实验组和不同的蜂胶浓度组,每组重复3次,每张滤纸片(直径6mm)加样7μl,观察48h的抑菌效果。结果河南蜂胶在pH5.5、6.0、6.5、7.0、7.5、8.0、8.5条件下对白色念珠菌的抑菌环直径(mm)分别为:9.08±0.80、11.25±0.43、11.42±0.63、12.58±0.29、15.25±0.43、21.50±0.87、29.00±0.50;蜂胶浓度从15.50%～0.12%蜂胶组及空白对照组的抑菌环直径(mm)依次为:25.50±0.50、22.25±0.43、18.67±0.76、15.83±0.58、10.33±1.04、8.50±0.00、7.25±0.25、0、0、0。结论河南蜂胶对白色念珠菌的抑菌活性随蜂胶浓度和pH的降低而减弱,可观察到抑菌环的最低蜂胶浓度为0.25%。     

In vitro cytotoxicity of Indonesian stingless bee products against human cancer cell lines

ObjectiveTo screen crude extracts of propolis, bee pollen and honey from four stingless bee species [Trigona incisa (T. incisa)], Timia apicalis, Trigona fusco-balteata and Trigona fuscibasis) native to East Kalimantan, Indonesia for cytotoxic activity against five human cancer cell lines (HepG2, SW620, ChaGo-I, KATO-III and BT474).MethodsAll samples were extracted with methanol, and then subpartitioned with n-hexane and ethyl acetate. Each crude extract was screened at 20 μg/mL for in vitro cytotoxicity against the cell lines using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. In addition, four previously shown bioactive components from propolis (apigenin, caffeic acid phenyl ester, kaempferol and naringenin) and two chemotherapeutic drugs (doxorubicin and 5-fluorouracil) were used to evaluate the sensitivity of the cell lines.ResultsOverall, crude extracts from propolis and honey had higher cytotoxic activities than bee pollen, but the activity was dependent upon the extraction solvent, bee species and cell line. Propolis extracts from T. incisa and Timia apicalis showed the highest and lowest cytotoxic activity, respectively. Only the HepG2 cell line was broadly sensitive to the honey extracts. For pure compounds, doxorubicin was the most cytotoxic, the four propolis compounds the least, but the ChaGo-I cell line was sensitive to kaempferol at 10 μg/mL and KATO-III was sensitive to kaempferol and apigenin at 10 μg/mL. All pure compounds were effective against the BT474 cell line.ConclusionsPropolis from T. incisa and Trigona fusco-balteata contain an in vitro cytotoxic activity against human cancer cell lines. Further study is required, including the isolation and characterization of the active antiproliferative agent(s).     

蜂胶对幽门螺杆菌感染长爪沙鼠胃黏膜影响的初步观察

目的 观察蜂胶对幽门螺杆菌（Hp）感染长爪沙鼠胃黏膜的影响.方法 5周龄长爪沙鼠15只,随机分为对照组、感染组和蜂胶组.所有沙鼠禁食24h后,感染组和蜂胶组灌胃Hp菌液109cfu/ml,0.5 ml/只,连续灌胃3次,感染后4周每隔5d灌胃一次,感染后第16周连续5d每天灌胃一次加强感染;对照组灌胃无菌肉汤;蜂胶组在第22周和第24周灌胃蜂胶溶液,感染组和对照组灌胃生理盐水;27周处死所有试验动物,测量肝、肾、脾重量并计算脏器系数,测定血清IL-8,取胃黏膜进行Hp定量培养和病理学观察.结果 与对照组相比,感染组血清IL-8显著降低（P＜0.05）,与感染组相比,蜂胶组血清IL-8显著升高（P＜0.01）;各组肝脏、肾脏和脾脏脏器系数差异均不显著（P＞0.05）;蜂胶组的Hp数量（246±172 cfu/mg）显著低于感染组（1075±688 cfu/mg）（P＜0.05）;病理检查结果显示感染组胃黏膜炎症较严重.结论 蜂胶可抑制沙鼠胃内Hp的生长,具有一定的黏膜修复和器官保护作用.     

蜂胶对大鼠实验性胃溃疡的作用

用５种大鼠胃溃疡模型观察了蜂胶乙醇提取液的抗溃疡作用，并探讨其机理。实验结果，蜂胶乙醇提取液能对抗幽门结扎型溃疡的形成（Ｐ＜０．０１），降低胃中的总酸度（Ｐ＜０．０５）和胃蛋白酶活性（Ｐ＜０．０１），还能对抗应激型（Ｐ＜０．０１）、酒精型（Ｐ＜０．０５）和消炎痛型（Ｐ＜０．００１）溃疡的形成，并促进醋酸型溃疡的愈合（Ｐ＜０．０１）。     

Phenols and antioxidant activity of hydro-alcoholic extracts of propolis from Algarve,South of Portugal

Propolis is a natural honeybee product known to be beneficial for human health, with a complex chemical composition, highly dependent on the collection site. The objective of the present research was to evaluate phenols and antioxidant activity of propolis samples collected in three main areas of Algarve, South of Portugal. Water revealed to be less effective for extracting phenolic compounds from propolis than the methanol and water/ethanol. The last two were good extraction solvents of phenols. Nevertheless water/ethanol was the solvent chosen because it was able to extract phenols in considerable amounts being less toxic than methanol.     

蜂胶鱼油软胶囊对小鼠免疫功能的影响研究

目的观察蜂胶鱼油软胶囊对小鼠免疫功能的影响。方法设蜂胶鱼油软胶囊低、中、高3个剂量组（0．17g／kg、0．33g／kg、1．00g/kg,分别相当于人推荐量的5、10、30倍）,另设阴性对照组（蒸馏水）和溶剂对照组（大豆油）,经口灌胃给药30d,观察对刀豆素A（ConA）诱导脾淋巴细胞增殖功能、绵羊红细胞诱导的迟发型变态反应（DTH）、血清溶血素、抗体生成细胞、巨噬细胞吞噬鸡红细胞功能、NK细胞活性的影响。结果与对照组相比,中、高剂量组能显著增加小鼠溶血空斑数,并能显著提高小鼠腹腔巨噬细胞对鸡红细胞的吞噬率（P〈0．05）。结论蜂胶鱼油软胶囊具有增强非特异和体液免疫功能的作用。     

Long-term effects of propolis on serum biochemical parameters of rainbow trout (Oncorhynchus mykiss)

Long-term effects of propolis administration on serum biochemical parameters of rainbow trout (Oncorhynchus mykiss) were investigated. To determine the possible toxicity and side effects of propolis, fish were fed on diets containing 0, 0.5, 1.5, 4.5 and 9 g propolis/kg diet for 8 weeks. At the end of the experiment, various seric biochemical parameters were determined. Our results showed that all dosages induced no significant alterations in growth parameters and the seric levels of total protein, albumin, globulin, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol and triglycerides and activities of glutamic pyruvic transaminase, glutamic oxaloacetic transaminase, alkaline phosphatase and lactate dehydrogenase, when compared to the control group. On the basis of our findings, propolis is a non-toxic substance for rainbow trout and its long-term administration might not have any side effects.     

蜂胶水提液对体外培养的血管内皮细胞凋亡的影响

目的：探讨泰山蜂胶水提液对一定浓度的肿瘤坏死因子-α诱导的人脐静脉内皮细胞凋亡的作用。方法:用消化灌注法收集人脐静脉内皮细胞进行体外原代培养，用终浓度为50 μg/L的肿瘤坏死因子-α诱导其凋亡，培养液中分别加入终浓度为50 mg/L、100 mg/L和200 mg/L的蜂胶水提液干预，共同孵育24h，用流式细胞仪和缺口末端标记技术TUNEL检测细胞凋亡率。结果:模型组内皮细胞凋亡率均明显高于对照组，不同浓度蜂胶组内皮细胞凋亡率明显低于模型组（P＜0.01）。结论:泰山蜂胶水提液能抑制肿瘤坏死因子-α诱导的人脐静脉内皮细胞的凋亡，从而起到保护血管内皮细胞的作用。