Vascular endothelin ET(B) receptor-mediated contraction requires phosphorylation of ERK1/2 proteins

In cardiovascular diseases, endothelin type B (ET(B)) receptors in arterial smooth muscle cells are upregulated. The present study revealed that organ culture of rat mesenteric artery segments enhanced endothelin ET(B) receptor-mediated contraction paralleled with increase in the receptor mRNA and protein expressions. The endothelin ET(B) receptor-mediated contraction was associated with increase in phosphorylation of extracellular regulation kinase 1 and 2 (ERK1/2) proteins and elevated levels of intracellular calcium. The elevation curve of intracellular calcium consisted of two phases: one rapid and one sustained. Inhibition of ERK1/2 phosphorylation by SB386023 or blockage of calcium channels by nifedipine significantly reduced the endothelin ET(B) receptor-mediated contraction (P<0.05) and decreased the sustained phase of intracellular calcium level, but not the rapid phase. Thus, phosphorylation of ERK1/2 proteins and elevation of intracellular calcium level are required for endothelin ET(B) receptor-mediated contraction in rat mesenteric artery.     

激素性骨坏死血管变化的实验研究

目的观察激素性骨坏死动物血管功能障碍,血管损伤,血流粘滞和血管再生障碍变化的规律和过程。方法选用中国白兔随机分2组。A组：马血清加用甲基强的松龙组;B组：单用甲基强的松龙组。A、B组分别于用药前及最后一次用激素后3、7、21d测定血浆内皮素（ET）、细胞间粘附分子-1（ICAM-1）和血栓调节蛋白（TM）。A组动物于首次注射血清1周,首次应用激素后1、3、5、7周;B组动物于首次注射激素后1、3、5、7周分批处死取双侧股骨头。常规HE染色和VEGF免疫组化染色。结果血清加激素组的变化较单纯应用激素组有更强的变化;血清加激素组动物ICAM-1和TM在应用激素后3周时已开始回复,而ET未见回复;2组动物的VEGF表达都表现为降低后逐渐回复的过程。结论应用激素后,股骨头普遍存在前坏死状态,这种情况具有一定的可恢复性,但恢复结果可能受多种因素影响,因而应对这类情况进行长期的观察。     

丁二磺酸腺苷蛋氨酸联合复方甘草酸苷治疗酒精性肝硬化患者疗效及其对血清BGP水平的影响*

目的 探讨应用丁二磺酸腺苷蛋氨酸肠溶片联合复方甘草酸苷治疗酒精性肝硬化患者的疗效及其对血清骨钙素（BGP）水平的影响。方法 2016年3月~2018年2月我院诊治的酒精性肝硬化患者276例,采用随机数字表法分为观察组（n=138）和对照组（n=138）。给予对照组患者丁二磺酸腺苷蛋氨酸肠溶片口服,观察组患者在对照组治疗的基础上给予复方甘草酸苷注射液静脉滴注,治疗3 w。采用放射免疫法检测血清BGP水平,采用ELISA法检测血清胰岛素样生长因子1（IGF-1）水平,采用化学发光免疫法检测血清透明质酸（HA）、黏连蛋白（LN）、IV型胶原（IV-C）和III型前胶原（PC-III）水平。结果 在治疗结束时,观察组血清ALB为（36.8±10.3） g/L,显著高于对照组[（29.4±9.2） g/L,P<0.05],血清TBIL为（26.4±5.1） μmol/L,显著低于对照组[（47.3±9.4） μmol/L,P<0.05],血清GGT水平为（158.6±72.8） U/L,显著低于对照组[（254.6±100.4） U/L,P<0.05];观察组血清HA为（72.6±18.4） μg/L,显著低于对照组[（158.4±30.5） μg/L,P<0.05],LN为（87.4±8.3） μg/L,显著低于对照组[（165.3±19.8） μg/L,P<0.05],PC-III为（94.5±31.3） μg/L,显著低于对照组[（147.4±42.5） μg/L,P<0.05],IV-C为（64.3±9.5） μg/L,显著低于对照组[（98.4±26.4） μg/L,P<0.05];观察组血清IGF-1水平为（198.2±34.6）ng/ml,显著高于对照组[（162.5±30.5） ng/ml,P<0.05],BGP为（8.8±3.9） ng/ml,显著高于对照组[（6.7±3.0） ng/ml,P<0.05]。结论 应用丁二磺酸腺苷蛋氨酸肠溶片联合复方甘草酸苷治疗酒精性肝硬化患者近期疗效显著,可显著改善患者肝功能指标,可能与升高了血清IGF-1和BGP水平有关。     

正交试验优选硫酸铵梯度法制备苦参碱脂质体的工艺研究

目的 以包封率为指标优选苦参碱脂质体的制备工艺.方法 以氢化大豆卵磷脂(HSPC)和胆固醇(Ch)为膜材,采用薄膜超声-硫酸铵梯度法制备脂质体.通过正交设计优化处方工艺,葡聚糖凝胶法分离游离药物,HPLC法测定月旨质体中苦参碱的包封率.结果 最佳工艺为:HSPC:Ch=3∶1,探头超声10 min,药脂比为1:15,包封率均值为50.68％.结论 优化后的工艺可提高苦参碱脂质体的包封率,此工艺条件简单,可操作性强,适于实验室条件下制备苦参碱脂质体.     

Antiproliferative Activity of the Chinese Medicinal Compound,Delisheng, Compared With Rg3 and Gemcitabine in HepG2 Cells

Delisheng consists of radix ginseng, radix astragali, venenum bufonis and mylabris. It has been reported that delisheng inhibits the proliferation of adenocarcinoma cells and stimulates their apoptosis. Delisheng can also enhance the body''s immunity and induce the redifferentiation of carcinoma cells. Delisheng inhibited the proliferation of HepG2 cells in MTT assay and promoted apoptosis more effectively in contrast to the active components of ginseng extract, Rg3 and gemcitabine. It is possible that Rg3 has an important role in delisheng because they all could regulate the cell cycle, apoptosis and expression of endostatin and VEGFR-2. Delisheng caused the cell cycle to arrest at the S phase, while gemcitabine blocked the cells at the G0/G1 phase in cell cycle analysis. Consequently, the apoptosis rate of the HepG2 cell line can be increased significantly by delisheng in combination with gemcitabine, compared with the single drug. The expression of the procaspase proteins, caspase protein, and dr5 detected by Western blot were increased while bcl-2 and survivin decreased in the delisheng group, compared with controls. The observations suggest that the delisheng induced apoptotic effect might be closely related to the mitochondrial apoptosis pathway, and the death receptor signaling pathway.     

Intensity of platelet beta(3) integrin in patients with hemorrhagic fever with renal syndrome and its correlation with disease severity

beta(3) Integrin has been identified as a cellular receptor for Hantaan virus, which causes hemorrhagic fever with renal syndrome (HFRS). To investigate the relationship between intensity of the platelet membrane beta(3) integrin (CD61) and disease severity, the percentage of CD61-positive platelets and the mean fluorescence intensities (MFI) of platelet CD61 were determined in patients with HFRS by flow cytometry. The intensity levels of CD61 in patients with HFRS were significantly higher than those in the controls and correlated with the clinical phases of the disease. The CD61 intensity at the oliguric phase was inversely correlated with platelet count and serum albumin, and positively correlated with white blood cell count, blood urea nitrogen, serum creatinine, and alanine aminotransferase levels. The results suggest that the intensity levels of platelet CD61 were elevated and associated with clinical phases and disease severity in patients with HFRS, and the intensity of platelet beta(3) integrin in patients with HFRS may be indicative of disease severity.     

山西省太原地区乙型病毒性肝炎经济负担影响因素分析

目的了解山西省太原地区住院乙肝患者的疾病经济负担并探讨其影响因素。方法采用整群抽样方法选取样本,利用问卷方式进行调查,SPSS13．0统计软件进行统计分析。结果山西省太原地区乙肝患者本次住院人均疾病直接费用为（22527．18±21755．36）元,间接费用为（2250．64±2173．39）元,总费用为（24777．82±23171．55）元。年龄、户籍、职业、医疗保障和住院天数分别对各项费用影响有统计学意义。结论乙肝患者的疾病经济负担非常重,应进一步加大政府投入,提高基层医疗机构的疾病诊治能力,将乙肝抗病毒药物更多地纳入医疗保障中,以降低乙肝患者的经济负担。     

血压盐敏感者早期血管内皮功能改变研究

目的 盐敏感者较早出现靶器官功能损害,其心血管风险增加.本研究探讨血压正常或血压轻度偏高的盐敏感者血管内皮功能改变.方法 选99例年龄16～60岁、血压正常或血压轻度偏高者参与为期2周的慢性盐负荷试验,检测盐敏感性.试验包括基线3 d,低盐饮食、高盐饮食各7 d的研究.基线时采用彩色多普勒超声检测血流调节的血管扩张性,反映内皮依耐性血管舒张功能.试验各个阶段测量体重、血压,并收集血、尿标本.结果 盐敏感者检出率17.2%,盐敏感与盐不敏感者基线尿钠、钾排泄量无差异,而血浆NO浓度盐敏感者低于盐不敏感者[(61. 2±13.3)μmol/L比(82.5±14.6)μmol/L,P＜0.05];盐敏感者血流介导的肱动脉扩张性低于盐不敏感者[(10.2±2.5)%比(14.5±1.6)%,P＜0.05].结论 盐敏感者尽管尚处在血压正常或血压轻度偏高阶段已存在内皮功能损伤.

Abstract：

Objective Salt-sensitivity is associated with more severe target organ injury and higher mortality in patients with essential hypertension. We compared the vascular endothelial function between saltsensitive subjects(SS)and non-salt-sensitive subjects(NSS)with normal or mildly increased blood pressure. Methods Ninety-nine subjects(aged 16-60 years)with normal blood pressure or mild hypertension(degree 1)were enrolled. The test program included 3 days baseline investigation, 1 week lowsalt loading phase and 1 week high-salt loading phase. Endothelial function was assessed by measuring the flow mediated dilatation(FMD)of the brachial artery using high resolution ultrasound. Results There was 17. 2% SS. Plasma NOx level[(61.2 ± 13. 3)μmol/L vs(82. 5 ± 14. 6)μmol/L, P ＜ 0. 05]and FMD [(10.2±2.5)%vs(14.5 ± 1.6)%, P ＜0.05]were significantly lower in SS subjects than in NSS subjects. Conclusion Vascular endothelial dysfunction was evidenced in SS subjects with normal blood pressure or in the early stage of hypertension.     

血脂监测日记在高脂血症患者自我管理中的应用与效果

目的 探讨血脂监测日记在高脂血症患者自我管理中的应用与效果.方法 将血脂异常的83例患者随机分为两组,对照组43例,观察组40例,两组患者均接受调脂治疗,出院后接受常规的电话随访及院外健康教育;观察组在此基础上使用血脂监测日记记录每日的生活方式及阶段血脂变化.1年后比较两组患者的血脂各项指标达标率.结果 观察组患者的总...     

超声弹性应变率比值法与弹性分级法在甲状腺占位性病变诊断中的比较研究

目的：比较超声弹性成像应变率比值法及弹性成像分级法对良、恶性甲状腺占位性病灶的鉴别诊断价值。方法：对手术病理证实的129个甲状腺占位性病变的超声弹性图像进行回顾性分析,对弹性分级法及弹性应变率比值法分别用受试者工作特征曲线（ROC曲线）评价其诊断价值,并比较两种方法的敏感性、特异性及准确性。结果：超声弹性应变率比值法及弹性评分法判断甲状腺占位性病灶的ROC曲线下面积（Az）分别为：0.972和0.938,差异无统计学意义（Z=0.904,P〉0.05）;二者判断甲状腺良、恶性病灶的敏感性、特异性、准确性分别为81.0%、91.7%、89.9%和81.0%、88.0%、86.8%,二者比较敏感性、特异性、准确性差异均无统计学意义（P〉0.05）。结论：超声弹性应变率比值法作为一种半定量的评价方法相对更加客观,并且同弹性分级法一样,是一种有效的鉴别诊断甲状腺良、恶性病灶的影像学检查方法。