芹菜素醚化及溴化衍生物的合成及抗肝癌活性研究

目的:合成芹菜素甲醚化、二氟甲醚化及溴化衍生物,进行抗肝癌活性研究。方法:以芹菜素为原料,经硫酸二甲酯甲醚化、溴素溴化或一氯二氟甲烷二氟甲醚化,柱层析分离,合成芹菜素衍生物。MTT法测定氟尿嘧啶(5-FU)、芹菜素衍生物对体外培养人肝癌HepG2细胞活性的抑制作用。结果:共得到6个化合物,结构经1H-NMR等进行了确证;MTT法测定结果表明,化合物1抑制HepG2细胞活性作用的IC50值是7.86±1.35μg/mL,与化疗药5-FU(7.18±0.85μg/mL)类似;化合物2～7的IC50值分别为2.62±0.32、0.65±0.12、3.21±0.43、4.36±0.51、4.13±0.46和1.96±0.29μg/mL;其中以化合物3的效价强度最大,是先导物芹菜素的12.09倍,化疗药5-FU的11.05倍。结论:芹菜素衍生物的抗肝癌活性较芹菜素更强,其中化合物3(6-8-二溴-7,4'-二甲氧基-5-羟基黄酮)是一个具有开发潜力的抗肝癌活性新化合物。     

新型蜀羊泉碱衍生物的合成及体外抗肿瘤活性

蜀羊泉碱是一类来源于白英的甾体生物碱,具有多种生物活性。本文通过对其C-3位羟基、E环和F环进行结构修饰,合成了10个蜀羊泉碱衍生物,并对人前列腺癌细胞PC-3进行了体外癌细胞增殖抑制实验。体外实验显示部分化合物对人前列腺癌细胞PC-3有较好增殖抑制作用,其中化合物 19 活性最好,其IC ₅₀为（4.8±0.9）μmol/L。     

2‘—乙酰基—12—羟基—2，3，10，11—二脱水—6—氧—甲基红霉素A的新合成法

14元环大环内酯抗生素红霉素A(Erythromycin A,1)是广泛应用的口服抗生素.然而,在胃酸条件下,红霉素会很快被降解为无活性的降解产物,从而降低了红霉素的生物利用度[1].因此,为了提高红霉素的酸稳定性而进行了大量的研究工作,如:第二代半合成红霉素衍生物,克拉霉素(Clarithromycin,2)[2],阿齐霉素[3,4](Azithromycin,3),具有很好的临床疗效.     

中药益气解毒颗粒下调端粒酶活性抑制鼻咽癌细胞的生长

目的研究益气解毒颗粒对鼻咽癌细胞端粒酶(Telomerase)活性的影响。方法先用MTT法检测益气解毒颗粒杀伤鼻咽癌细胞系(HNE1)的半抑制浓度(IC50),再用10×IC50,1×IC50,0.5×IC50作用HNE1 12,24,48,72和96 h,然后检测HNE1端粒酶活性;将HNE1接种至BABL/C裸鼠,制备鼻咽癌细胞系裸鼠移植瘤,灌喂中药益气解毒颗粒药液,观察其在体内对鼻咽癌细胞端粒酶活性的影响。结果益气解毒颗粒体外杀伤鼻咽癌细胞的IC50为6.625 mg/mL,10×IC50作用HNE1端粒酶活性下降为阴性(<0.20);1×IC50作用后,端粒酶活性(0.47±0.11)稍有下调,0.1×IC50作用后,端粒酶活性(0.78±0.17),低于空白对照组(1.20±0.23)。灌喂益气解毒颗粒组移植瘤生长受到明显的抑制,抑瘤率为(83.20±7.56)%,端粒酶活性为(0.37±0.10),明显低于对照组(0.89±0.27)。结论益气解毒颗粒在体外和体内均能抑制端粒酶的活性,可能是通过对鼻咽癌细胞端粒酶的活性抑制而发挥抑瘤效应。     

吡喃型异黄酮的全合成

14元环大环内酯抗生素红霉素Ａ(ＥｒｙｔｈｒｏｍｙｃｉｎＡ ,1 )是广泛应用的口服抗生素。然而 ,在胃酸条件下 ,红霉素会很快被降解为无活性的降解产物 ,从而降低了红霉素的生物利用度[1 ] 。因此 ,为了提高红霉素的酸稳定性而进行了大量的研究工作 ,如 :第二代半合成红霉素衍生物 ,克拉霉素 (Ｃｌａｒ ｉｔｈｒｏｍｙｃｉｎ ,2 ) [2 ] ,阿齐霉素[3,4] (Ａｚｉｔｈｒｏｍｙｃｉｎ ,3 ) ,具有很好的临床疗效。Ｒ =ＨＥｎｇｔｈｒｏｍｙｃｉｎＡ 1Ｒ =ＣＨ3Ｃｌａｒｉｔｈｒｏｍｙｃｉｎ 2Ａｚｉｔｈｒｏｍｙｃｉｎ 3这些半合成红霉素衍生物…     

B环溴取代的白杨素衍生物合成及其抗癌活性

目的 研究B环溴取代白杨素衍生物的体外抗癌活性.方法 合成B环溴取代的白杨素衍生物.并通过MTT法检测其对人急性粒细胞性白血病(HL-60)细胞、人结肠癌(HT-29)细胞和人胃癌(SGC-7901)细胞增殖抑制作用.结果 合成了3个B环溴取代白杨素衍生物.结论 B环溴取代白杨素衍生物具有良好的抗癌活性(IC50=1.15～5.63μmol/L).     

肺炎支原体对大环内酯类和氟喹诺酮类药物敏感性分析

目的 通过检测肺炎支原体(Mp)对大环内酯类药物及喹诺酮类药物的敏感性,为临床治疗提供参考依据.方法 采用微量肉汤稀释法检测7种大环内酯类和3种喹诺酮类药物对45株Mp的MIC.结果 45株Mp对红霉素的耐药率为11.1%,新型大环内脂药物克拉霉素和阿奇霉素抗Mp活性最强,其MIC50分别为0.008 μg/mL和0.016μg/mL,其次是交沙霉素、司帕沙星和加替沙星,其MIC50分别为0.0312μg/mL、0.125μg/mL和0.25μg/mL;而红霉素抗Mp活性最差,MIC50为2μg/mL.结论 Mp对红霉素存在不同程度的耐药.大环内脂类药物克拉霉素抗Mp活性强于阿奇霉素、交沙霉素和红霉素;司帕沙星抗Mp活性强于加替沙星和左氧氟沙星.     

淫羊藿提取物对小鼠T淋巴细胞体外活化和增殖的影响

目的研究淫羊藿水溶性提取物对刀豆蛋白A(ConA)刺激的小鼠T淋巴细胞体外早期活化和增殖的影响。方法无菌分离小鼠各部位淋巴结,制备单细胞悬液,加入不同终质量浓度(5、25、50mg/L)的淫羊藿提取物,以MTT法检测药物对T细胞活性的影响;利用流式细胞术(FCM)结合双色荧光抗体染色技术检测早期活化标志CD69分子的表达;运用流式细胞术结合活体染料CFDA-SE染色技术和荧光抗体染色技术检测T细胞增殖。结果MTT法检测淫羊藿提取物在50mg/L时细胞存活率达52.36%。ConA作用6h后,对照组CD69 表达率为(4.61±0.85)%,ConA组CD69 T细胞的比率上升至(38.30±2.54)%,淫羊藿提取物在终质量浓度5、25、50mg/L时均抑制ConA诱导的CD3 T淋巴细胞CD69的表达(P<0.01),其表达率分别下调为(36.16±2.14)%,(30.5±1.72)%,(15.99±0.87)%。培养48、72后,对照组增殖指数(PI)分别为1.01±0.01和1.05±0.01,ConA组PI分别达到1.42±0.01、2.32±0.01,淫羊藿提取物在终质量浓度5、25、50mg/L均抑制T淋巴细胞增殖(P<0.01),48h时PI分别为1.28±0.01、1.26±0.01、1.21±0.01;72h时PI分别为2.30±0.03、2.13±0.02、2.10±0.01。结论淫羊藿提取物能明显抑制ConA刺激的小鼠T淋巴细胞的早期活化和增殖,并呈剂量依赖性。     

间充质干细胞抑制T淋巴细胞增殖减轻移植后GVHD机制研究

目的体外培养间充质干细胞(MSCs)并研究其抑制T淋巴细胞增殖减轻移植后移植物抗宿主病(GVHD)的机制。方法采用密度梯度离心法体外培养间充质干细胞,通过免疫细胞化学染色观察其是否表达TGF-β1及HGF,并在与异体T淋巴细胞共培养体系中加入抗-TGF-β1、抗HGF,通过MTT法检测T淋巴细胞增殖活性。结果间充质干细胞与淋巴细胞混合培养后淋巴细胞的增殖活性被明显抑制(P<0.001),免疫细胞化学染色发现间充质干细胞高度表达TGF-β1和HGF,在混合培养体系中加入两种细胞因子的抗体可以使T淋巴细胞的增殖活性恢复到未与间充质细胞共培养前的状态(P>0.05)。结论间充质干细胞分泌TGF-β1与HGF两种细胞因子抑制T淋巴细胞增殖减轻移植后GVHD,且二者具有协同作用。     

熊果酸衍生物的合成及其体外抗肿瘤活性评价

目的 通过合成系列熊果酸衍生物,测试其抑制肿瘤细胞增殖活性,探讨熊果酸衍生物抑制肿瘤细胞增殖的构效关系,获得抗肿瘤活性更好的熊果酸衍生物.方法 通过乙酰化反应对熊果酸的3-位羟基进行保护后,再将其28-位羧基制备成酰氯并与氨基酸酯反应,最后再在碱性条件下水解制备得28-位羧基被修饰的熊果酸衍生物.所有熊果酸衍生物的结构通过核磁共振氢谱(1HNMR)、核磁共振碳谱(13CNMR)和高分辨质谱(HRMS)进行确认.采用MTT法测试熊果酸衍生物抑制U937、HL-60、Jurkat、K562、DU145、EC109、MDA231和SMMC7721肿瘤细胞的增殖活性.结果 仪器分析结果表明所制备的熊果酸衍生物均为设计的目标化合物.对抑制U937肿瘤细胞增殖结果表明熊果酸28-位羧基被对4-氨甲基苯甲酸、7-氨基己酸和8-氨基辛酸修饰后,在给药浓度为5.0×10-6 mol/L时对U937细胞增殖的抑制率分别达到(18.84 ±2.58)％、(43.17±4.52)％和(68.38±7.95)％,明显优于母体熊果酸母体(10.06 ±2.35)％ (P ＜0.05).对Jurkat细胞增殖的抑制率则分别达到(68.42±8.19)％、(58.36±7.99)％和(61.08±5.77)％,远高于熊果酸的(6.89±2.31)％(P＜0.05).结论 对熊果酸28-位羧基进行延长修饰,有利于提高熊果酸的抗肿瘤活性,当延长7～8个碳原子,抗肿瘤效果最好.     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

CLINICAL SIGNIFICANCE OF SERUM CYTOKINES IL-1β,sIL-2R,IL-6,TNF-α,AND IFN-v IN ACUTE CORONARY SYNDROME

Objectives To explore serum cytokines levels (including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v) and their significance in patients with acute coronary syndrome (ACS) and the subsequent follow-ups, with attempt to estimate the role of various serum inflammatory markers in the diagnosis and assessment of ACS.Methods The study population include 40 patients with acute myocardial infarction (AMI), 40 patients with unstable angina pectoris (UAP), and 40 controls. Among the 80 patients, 60 patients attended a follow up 4 months later. Serum inflammatory markers including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v were measured by enzyme linked immunosorbent assay.Results Serum IL- 1 β, sIL-2R, IL-6, TNF-α were significantly higher in AMI group or UAP group compared to the control group and became significantly lower 4 months later in the follow-up patients. Serum levels of IFN-v shows no significant difference between AMI group or UAP group and controls, also showing no significant change when measured in follow up patients. There was no correlation between serum creatine kinase-MB isoenzyme levels and serum inflammatory markers either in UAP or AMI group. Furthermore, when divided into two subgroups using Wagner's QRS scoring system in the AMI group, there is no difference of each serum inflammatory marker between ≤ 6 scores group and ＞ 6 scores group.Conclusion Serum levels of certain inflammatory markers may have some diagnostic value for ACS, and can be a useful marker reflecting disease stability.