大豆异黄酮与葡萄籽原青花素对2型糖尿病大鼠抗氧化功能的影响

目的探讨大豆异黄酮(SIF)与葡萄籽原青花素(GSPC)对2型糖尿病大鼠抗氧化功能的影响。方法30只SD大鼠随机分成普食对照组(A组,6只,喂养基础饲料)和高脂饲料组(24只,高脂饲料喂养)。用链脲佐菌素将高脂饲料组大鼠制备成糖尿病大鼠,将模型制备成功的18只大鼠随机分成3组:糖尿病对照组(B组)、SIF GSPC250mg·kg-1·d-1剂量干预组(C组)和SIF GSPC50mg·kg-1·d-1剂量干预组(D组)。A组和B组大鼠用消毒后的自来水灌胃,C组和D组大鼠以两种剂量的SIF GSPC分别灌胃。检测6周、10周后各组大鼠空腹血糖水平以及10周后大鼠血清超氧化物歧化酶(SOD)活性及还原型谷胱甘肽(GSH)、丙二醛(MDA)、一氧化氮(NO)水平。结果10周后C组和D组大鼠空腹血糖较B组均下降,但只有C组大鼠空腹血糖水平与B组相比,差别均有统计学意义(P<0.05)。C组大鼠血清SOD活性和GSH、MDA、NO水平与B组比较,差别均有统计学意义(P<0.05);D组大鼠SOD活性和NO水平与B组比较,差别有统计学意义(P<0.05)。结论大豆异黄酮协同葡萄籽原青花对于改善2型糖尿病大鼠的抗氧化能力有作用。     

电感耦合等离子体质谱法直接测定酱油中铅

目的:建立电感耦合等离子体质谱(ICP-MS)法直接测定酱油中铅的方法。方法:酱油经适当稀释后直接进样测定,外标法绘制工作曲线、在线内标校准基体效应及信号漂移。结果:相对标准偏差<3.0%,加标回收率95.8%~104.3%,用该方法对CNAS能力验证酱油样品进行了测定,测定结果令人满意。结论:该方法样品前处理简单,方法准确、灵敏、快速,检出限低,精密度好。     

HPLC-ELSD法测定大豆磷脂注射液中有关物质

目的:建立HPLC-ELSD法测定大豆磷脂注射液中有关物质溶血性磷脂酰胆碱的含量。方法:采用C18色谱柱(250mm×4.6mm,5μm),以甲醇-冰醋酸(500∶10,用三乙胺调pH至6.2)为流动相,柱温为室温,流速为1.0mL/min,进样量为10μL;蒸发光散射检测器参数:载气为空气,载气压力为250kPa,载气流量为2.0L/min,漂移管温度为60℃。结果:大豆磷脂注射液中主成分磷脂酰胆碱和溶血性磷脂酰胆碱能很好地分离检出,其线性浓度范围分别为20.4~801.6(r=0.9995)和10.652~532.6(r=0.9994)mg/L,溶血性磷脂酰胆碱的最低检测限为5.326ng。辅料对检测无干扰。结论:该方法准确、灵敏、快捷,适用于大豆磷脂注射液中有关物质的测定。     

Hepatocytes targeting of cationic liposomes modified with soybean sterylglucoside and polyethylene glycol

AIM: In this study, a hepatocyte-spedfic targeting technology was developed by modifying cationic liposomes with soybean sterylglucoside (SG) and polyethylene glycol (PEG) (C/SG/ PEG-liposomes). METHODS: The liposomal transfection efficiencies in HepG2 2.2.15 cells were estimated with the use of fluorescein sodium (FS) as a model drug, by flow cytometry. The antisense activity of C/SG/PEG-liposomes entrapped antisense oligonucleotides (ODN) was determined as HBsAg and HBeAg in HepG2 2.2.15 cells by ELISA. The liposome uptake by liver and liver cells in mice was carried out after intravenous injection of 3H-labeled liposomes. RESULTS: C/SG-liposomes entrapped FS were effectively transfected into HepG22.2.15 cells In vitro. C/SG/PEG-liposomes entrapped ODN, reduced the secretion of both HBsAg and HBeAg in HepG2 2.2.15 cells when compared to free ODN. After in vivo injection of 3H-labeled C/SG/PEG-liposomes, higher radiation accumulation was observed in the hepatocytes than non-parenchymal cells of the liver. CONCLUSION: C/SG/PEG-liposomes mediated gene transfer to the liver is an effective gene-delivery method for hepatocytes-specific targeting, which appears to have a potential for gene therapy of HBV infections.     

大豆异黄酮对运动训练大鼠血液某些生化指标的影响

目的研究大豆异黄酮对运动训练大鼠血液某些生化指标的影响。方法大鼠游泳运动训练后测定血清超氧化物歧化酶(SOD)、谷草转氨酶(GOT)、谷丙转氨酶(GPT)活性及血糖(BS)、丙二醛(MDA)和全血血红蛋白(Hb)的含量并进行分析。结果与安静组比较,运动训练组SOD活性和BS含量出现适应性升高,而MDA含量和GOT活性有显著性升高(P<0.05)。给药 训练组大鼠与训练组比较,SOD活性、BS、Hb含量显著升高(P<0.05;P<0.01;P<0.05),MDA含量、GOT活性显著下降(P<0.05)。结论大豆异黄酮具有清除运动产生的脂质过氧化物和提高BS、Hb含量的作用。     

大豆磷脂脂质载体与胆酸盐表面活性剂的体外相互作用

采用旋转薄膜蒸发法结合挤压过滤工艺制备大豆磷脂脂质体,所制得脂质体的平均粒径为217nm,跨距0．838,负染色脂质体经透射电镜观察,呈明显的双层膜圆球型结构。以胆酸钠盐和脱氧胆酸钠盐研究其与脂质体之间的相互作用,将500nm波长处的可见光吸收值评价胆盐-脂质体混悬液的浊度,测定脂质体的粒径变化情况。在胆酸盐加入的初期,由于胆酸盐和脂质体形成混合胶团,致使脂质体的粒径和浊度值稍有增加,进一步加入的胆酸盐使脂质体的粒径和浊度值下降。胆盐和脂质体问的相互作用经历了数个重排现象,使脂质体的粒径发生规律性的变化,这与脂质体的体内稳定性密切相关,也可反映脂质体的载药和释药特性。     

The effects of soybean agglutinin binding on the corneal endothelium and the re-establishment of an intact monolayer following injury - A short review

This short review summarizes the localization and effects of the plant lectin soybean agglutinin (SBA) on the injured and non-injured organ-cultured rat corneal endothelium. Although the tissue exists as a non-cycling monolayer on the posterior corneal surface a circular freeze injury promotes wound repair as cells initiate DNA synthesis, mitosis and migration. As a result, by 24 h post-injury, endothelial cells express a surface protein that binds SBA in a diffuse punctate pattern, which by 48 h after injury, becomes confined to the cell periphery. As healing proceeds, SBA binding dramatically declines, such that, only scattered binding is observed by 72 h after wounding. In non-injured organ-cultured endothelia, weak SBA binding appears 24 h after explanation but becomes prominently detected around the cell periphery by 48 h. Incubating injured or non-injured endothelia in SBA leads to alterations in their cellular appearance due to the fact that lectin exposure results in the disruption of the actin cytoskeleton. Although this does not affect migration, treatment with either SBA or N-acetylgalactosamine (the SBA binding sugar) does interfere with the reestablishment of cell-cell contact. It is postulated that the surface protein that binds SBA is expressed during conditions that are stressful to the tissue. During organ-culture the protein's appearance suggests a cellular response to explantation in order to enhance or maintain monolayer integrity. In wound repair its appearance may serve to establish preliminary cell-cell contact during the restoration of the endothelial monolayer.     

大豆磷脂脂质体对离体心肌细胞缺血—再灌注膜损伤的影响

本文利用Langendroff's离体灌流装置探讨大豆磷脂脂质体对离体大鼠心肌细胞缺血—再灌注膜损伤的影响。结果表明:缺血—再灌注可致心脏流出液中磷酸肌酸激酶含量增加,心肌细胞游离脂肪酸聚积,心肌Ca~(2+),Mg~(2+)-ATP酶活性降低,线粒体膜脂脂质徽粘度增加;补充大豆磷脂脂质体(每毫升K-H液含500μg磷脂)能有效地抑止上述变化。结果提示:大豆磷脂脂质体可保护离体大鼠心脏,减轻心肌细胞缺血—再灌注膜损伤。     

大豆异黄酮对糖尿病模型大鼠血脂和氧化应激反应的影响

目的：研究大豆异黄酮(soybean isoflavone, SI)对实验性糖尿病模型大鼠血脂调节和抗氧化能力的影响。方法将120只SD大鼠按随机数字表法分为正常对照组,模型组,大豆异黄酮40、80、160和320 mg/kg组,每组20只。除正常对照组外,其余各组大鼠腹腔注射60 mg/kg链脲佐菌素(STZ)制备大鼠糖尿病模型。大豆异黄酮40、80、160和320 mg/kg组腹腔注射相应浓度大豆异黄酮溶液,正常对照组和模型组腹腔注射等体积生理盐水,连续给药8周后取材检测。分别测定各组大鼠血糖浓度;检测血清中总胆固醇(TC)、三酰甘油(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、天冬氨酸转氨酶(AST)、肌酸激酶(CK)、乳酸脱氢酶(LDH)水平及总抗氧化能力(T-AOC);测定心肌组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)的活性以及丙二醛(MDA)水平;采用苏木精-伊红(HE)染色观察心肌组织病理形态学改变。结果与模型组比较,大豆异黄酮80、160和320 mg/kg组大鼠血清中 AST[(104.25±24.92)U/L、(93.71±22.58)U/L、(88.26±23.80)U/L 比(127.65±38.17)U/L]、LDH[(954.7±153.5)U/L、(868.7±136.2)U/L、(834.1±146.3)U/L比(1097.6±184.2)U/L]、CK[(887.1±185.4)U/L、(831.9±182.8)U/L、(796.2±165.8)U/L比(973.6±211.4)U/L]活性降低(P＜0.05或P＜0.01),心肌组织中SOD [(9.96±2.05)U/mg、(10.47±2.32)U/mg、(11.06±2.29)U/mg比(8.72±1.70)U/mg]活性升高(P＜0.05或P＜0.01)、MDA[(5.98±1.35)nmol/mg、(5.47±1.42)nmol/mg、(5.16±1.53)nmol/mg 比(6.58±1.54)nmol/mg]水平降低(P＜0.05或P＜0.01);大豆异黄酮160、320 mg/kg组大鼠血糖水平[(15.2±0.9)mmol/L、(14.8±0.8)mmol/L 比(18.6±1.2)mmol/L]降低(P＜0.05或 P＜0.01);血清中 T-AOC[(10.15±2.76)U/L、(11.29±3.47)U/L比(7.95±2.26)U/L]、HDL-C水平[0.73±0.20)mmol/L、(0.78±0.22)mmol/L比(0.62±0.14)mmol/L]升高(P＜0.05),TC[(2.69±0.85)mmol/L、(2.43±0.76)mmol/L比(3.42±0.81)mmol/L]、TG[(1.36±0.40)mmol/L、(1.18±0.23)mmol/L比(1.70±0.53)mmol/L,]、LDL-C[(1.02±0.26)mmol/L、(0.95±0.28)mmol/L比(1.18±0.27)mmol/L]水平降低(P＜0.05或P＜0.01);心肌组织中GSH-Px活性[(13.79±2.62)U/mg、(14.21±2.87)U/mg比(11.90±2.03)U/mg]升高(P＜0.05或P＜0.01);大豆异黄酮160、320 mg/kg组心肌组织病理学改变明显改善。结论大豆异黄酮可有效降低糖尿病大鼠血糖水平,降低血脂,增强机体抗氧化酶系统活性、抑制氧化应激损伤,对糖尿病大鼠有保护作用。