Some determinants of postprandial lipaemia in Nigerian diabetic and non-diabetic subjects.

The efficiency of clearance of plasma triacylglycerols (TAG) after fatty meals in non-diabetic Caucasian subjects is believed to determine the plasma level of high-density-lipoproteins-cholesterol (HDL-C). It is unknown if this observation holds in diabetic subjects and in other racial groups. In assessing the factors that determine TAG responses to acute fat loading in a tropical African population with a low prevalence of atherosclerotic disease, twenty (nine obese) non-insulin-dependent diabetic (NIDDM) patients with optimal glycaemic control and twelve (six obese) age-matched non-diabetic subjects were given meals containing 50 g fat (in butter) and 75 g carbohydrate (in white bread) over 15 min in the morning after a 12 h overnight fast. The fasting plasma levels of glucose, TAG, total cholesterol (total-C), HDL-C, low-density-lipoprotein-cholesterol, insulin and glycosylated haemoglobin (HBAlc) were estimated; glucose and TAG levels were also measured postprandially for 8 h at 2 h intervals. Postprandial lipaemia was consistently higher in the diabetic patients (about 50-100% more than values obtained in the non-diabetic subjects, even when corrected for differences in body mass) and correlated positively with age and postprandial glycaemia. This defect in TAG clearance was even worse (by about 50%) when glucose tolerance became further impaired after ten of the diabetic patients stopped oral hypoglycaemic treatment for 1 week and the fat-tolerance test was repeated. In the obese non-diabetic subjects, but not those of normal weight, there were significant negative relationships between the postprandial lipaemia and fasting plasma levels of HDL-C and HDL-C: total-C ratio, as reported in Caucasians. It is concluded that age and the ambient glucose concentration appear to be the important determinants of the efficiency of TAG clearance in diabetic subjects. This accords with clinical observations of increased atherogenic liability with increasing age and poorer glycaemic control. The determinants in non-diabetic subjects were less defined, indicating that postprandial lipaemia might be influenced by various factors (obesity as shown here) in different subsets of individuals.     

矿物药白石英优质矿产资源筛选及XRD Fourier指纹图谱研究

目的 分析不同产地白石英样品中矿物成分及含量,评价不同产地白石英样品的质量,筛选白石英优质矿产资源,并建立白石英X射线衍射（XRD）Fourier特征指纹图谱。方法 通过偏光显微及XRD分析不同样品矿物成分及其含量,以结晶度和石英含量作为评价指标。采用粉末XRD对白石英样品进行分析,建立中药白石英XRD Fourier特征指纹图谱,并进行模糊聚类分析、主成分分析和相似性评价。结果 偏光显微分析结果显示,不同产地白石英样品在结晶度上有明显不同。物相分析结果显示白石英样品主要成分为石英和正长石,且大多数样品含有钠长石。不同产地白石英中石英质量分数为91.2%~99.4%,其中浙江省安吉县章村镇和安徽省绩溪县扬溪镇白石英中石英质量分数最高,均为99.4%,浙江安吉县杭垓镇产白石英中石英质量分数为91.2%。建立了以12个共有峰为特征指纹信息的白石英XRD Fourier指纹图谱分析方法,其XRD Fourier指纹图谱的相似度为0.993～1.000。结论 在所采集的样品中,白石英药材品质总体较好,石英质量分数均在90.0%以上,其中浙江省安吉县章村镇和安徽省绩溪县扬溪镇所产白石英品质最好,其次为福建永安小陶镇和江苏新沂阿湖镇产白石英。偏光显微特征观察和XRD Fourier指纹图谱分析法可用于白石英的鉴定与分析。     

逍遥散对慢性应激损伤大鼠NR受体亚型表达的影响

目的:本研究用逍遥散和糖皮质激素受体(GR)阻滞剂干预慢性应激损伤大鼠,观察其海马区NR受体亚型表达情况。方法:以逍遥散(5.265g/kg)和GR受体阻滞剂RU-38486(12.5g/kg)为干预药物,应用慢性不可预知应激对大鼠进行为期3周的造模,在造模的同时给予实验药物,3周后停止刺激,于第22天处死大鼠取材。采用荧光免疫组织化学法,测定各组大鼠海马区NR表达。结果:GR受体阻滞剂RU-38486与中药复方逍遥散可显著下调慢性应激损伤大鼠海马区NR阳性表达。结论:逍遥散可以通过促进慢性应激损伤大鼠海马区NR表达下调,从而达到部分恢复慢性应激大鼠下丘脑—垂体—肾上腺(HPA)轴负反馈功能的作用,起到缓解诸应激症状的疗效。     

丹参素胶囊活血化瘀作用的实验研究

目的：研究丹参素胶囊对大鼠血小板聚集性和血液流变学及血栓形成的影响。方法：以ADP为诱导剂，观察其对体外血小板聚集率的作用；采用电刺激法，测定闭塞性血栓形成的时间；用冰水刺激制备“血瘀”模型，检测主要流变学指标。结果：丹参素胶囊能明显抑制由ADP诱导的大鼠血小板体外聚集活性，延长电刺激大鼠颈总动脉后血栓形成时间，降低“血瘀”大鼠全血粘度、血浆粘度、红细胞压积、红细胞电泳时间、卡松屈服应力以及红细胞聚集指数，改善机体血液流变性。结论：丹参素胶囊能明显降低血液“浓、粘、聚、凝”状态，具有良好的活血化瘀作用。     

昆明山海棠总生物碱对LPS诱导的小鼠RAW264.7细胞分泌TNF-αNO的影响

目的:研究THHta对LPS诱导的小鼠RAW264.7细胞分泌TNF-α及NO的影响,探讨THHta的抗炎作用机理.方法:CCK8法测定THHta对RAW264.7细胞增殖的影响;LPS刺激RAW264.7细胞建立体外炎症模型;ELISA法检测THHta对LPS诱导的RAW264.7细胞分泌TNF-α的影响;硝酸还原酶...     

水杉总黄酮对血小板聚集、血液流变性的作用及机制探讨

目的　观察水杉总黄酮 (FMG)对大鼠血小板聚集活性、血小板 5 HT释放反应、血浆NO含量及血液流变性的影响。方法　比浊法测定大鼠血小板聚集活性、荧光光度法测定血小板 5 HT释放反应、分光光度法测定血浆NO含量、血液流变全自动分析仪检测血液流变性。结果　FMG抑制大鼠血小板聚集活性 ,抑制血小板 5 HT释放 ,升高血浆NO含量 ,降低急性血淤大鼠的全血比粘度、血浆比粘度、红细胞电泳时间、红细胞压积、红细胞计数、细胞方程K值 ,改善大鼠的血液流变性。结论　FMG有抗血小板聚集活性、改善血液流变性的作用。其抗血小板聚集的作用机制可能与抑制血小板释放反应、增加体内NO合成及Ca2 + 拮抗作用有关     

RP-HPLC法测定复肝口服液中大黄素的含量

目的:建立以反相高效液相色谱(RP-HPLC)法测定复肝口服液中大黄素含量的方法。方法:色谱柱为Zorbax SB-C18(150mm×4.6mm,5μm),流动相为甲醇-0.1%磷酸(85∶15),检测波长为430nm,柱温为30℃,流速为1.0mL·min-1。结果:大黄素进样量在0.075 2～0.376 0mg范围内与峰面积积分值呈良好的线性关系(r=0.999 96);平均回收率为99.77%,RSD=1.03%(n=6)。结论:本方法简便、快速、重现性好,可用于复肝口服液的质量控制。     

中西医结合治疗幽门螺旋杆菌阳性消化性溃疡44例

目的:观察清幽I号方联合四联疗法对消化性溃疡(PU)幽门螺杆菌(Hp)的根除率及对溃疡复发的影响。方法:88例PU患者随机按数字法分为对照组和观察组各44例。对照组服用奥美拉唑,20 mg/次,2次/d;枸橼酸铋钾片,2粒/次,2次/d;阿莫西林胶囊,1 g/次,2次/d;克拉霉素,500 mg/次,2次/d。疗程为14 d。14 d后再采用法莫替丁,20 mg/次,1次/d,再治疗14 d。观察组在对照组治疗的基础上加用清幽I号方,1剂/d,常规水煎分2次服用,共28 d。记录治疗后Hp清除情况;采用组织学再生黏膜成熟度评价溃疡愈合质量;进行1年随访观察复发情况。结果:观察组总体疗效有效率为97.73%,对照组为81.82%,观察组优于对照组(P<0.05);观察组Hp清除率为90.9%,对照组为75%,观察组Hp清除率高于对照组(P<0.05);观察组再生黏膜组织学成熟度评价优于对照组(P<0.05);对照组13例复发,复发率45.16%,观察组8例复发,复发率20%,观察组复发率低于对照组(P<0.05);观察组平均复发时间(10.1±1.93)个月长于对照组的(8.7±1.84)个月(P<0.05)。结论:在常规四联疗法的基础上加服清幽I号方能提高Hp清除率,提高溃疡愈合质量,减少/延缓PU复发,提高临床疗效。     

樟芝菌粉三萜类化合物含量的测定

目的:测定樟芝发酵菌粉三萜类化合物含量.方法:以齐墩果酸为对照品,以5%香草醛-冰醋酸和高氯酸为显色剂,采用分光光度法在550 nm测定样品的吸光度.结果:总三萜在20～140 μg范围内呈良好的线性关系,其回归方程为:Y=0.004 9X-0.018 4,R2=0.997 8.樟芝菌粉三萜类化合物含量为1.73%.结论:该方法操作简单,灵敏度高且比较准确.     

丹参素对过氢化氢所致人脐静脉内层细胞损伤的保护作用用研究

目的 研究丹参素(Tanshinol)对过氧化氢所致人脐静脉内皮细胞(ECV-304)损伤的保护作用.方法 噻唑蓝(MTT)法检测细胞活力,比色法测定细胞培养液中超氧化物歧化酶(SOD)活性及细胞内丙二醛(MDA)含量,RT-PCR方法测定细胞内皮素1(ET-1)mRNA,过氧化物酶体增殖物激活受体γ(PPAR-γ)m...