首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 375 毫秒
1.
为建立一种检测活细胞数的方法,作者采用三磷酸腺苷(ATP)生物荧光液闪测定法检测小鼠纤维瘤细胞株L929.ATP标准曲线工作范围为10 -9~10-5mol/ml,相关系数r=0.9963(P<0.001);当活细胞数在3×1 02~106个/ml时与发光计数值有良好的线性关系,r=0.9922(P<0.001),变异系数 CV = 1%~3%.用ATP生物荧光液闪测定法检测活细胞数灵敏、简便、准确、重复性好,用液闪计数仪即可完成测定,有较大的实用价值.  相似文献   

2.
为探讨新鲜卵巢癌标本化疗药物敏感试验结果与临床疗效的相关性,采用三磷酸腺苷生物发光法(ATP-CVA),用液闪计数仪对25份新鲜卵巢癌组织标本进行药敏检测.结果显示:在ATP浓度为10-9~10-5mol/ml时,ATP标准品与发光计数值呈一线性关系,Y=1.48X+15.03,相关系数为0.9963;所检测的25份标本中成功22份,试验的可评价率为88% ,其敏感性为85.7%(12/14),特异性为83.3%(5/6),阳性预测值为92.3%(12/13),阴性预测值为71.4%(5/7),总的预测准确率为85%(17/20).上述结果表明,本药敏试验结果的预测准确性较高,与临床疗效之间具有很好的相关性,值得进行更深入的研究.  相似文献   

3.
目的 探讨微量检测 ATP在卵巢癌药敏试验中应用的可行性。方法 对 35例新鲜卵巢癌组织标本进行药敏试验 ,应用 Victor 2多功能检测仪微量检测 ATP值。结果  1Victor 2多功能检测仪微量检测 ATP标准品与发光值的关系 ,在 ATP浓度为 10 - 9~ 10 - 5m ol/ml时 ,显示极好的线性关系 ,直线方程为 Y =0 .892 X +10 .2 5 7,相关系数 r=0 .998(P<0 .0 1)。 2微量检测 ATP的变异系数平均为 7.3%。 3微量检测 ATP进行药敏试验 ,敏感性 92 .0 % ,特异性 70 .0 % ,预测准确率为 87.1%。结论 应用 Victor 2多功能检测仪微量检测 ATP进行药敏试验 ,方法稳定 ,实验成本降低 ,更为简便、快速 ,误差小 ,值得推广和普及  相似文献   

4.
目的:研究血管内皮生长因子(VEGF)及微血管密度(MVD)对估计人骨巨细胞瘤预后的价值。方法:通过对69例骨巨细胞瘤患者的随访,将他们分为无复发和无转移组及复发或转移组。采用免疫组织化学SABC法检测骨巨细胞瘤中VEGF、CD34的表达,用MVD值衡量CD34的表达。结果:无复发组42例的中位阳性细胞率为28%,复发转移组27例的中位阳性细胞率为48%,两组间差别有极显著性意义(P<0.001)。无复发组MVD值为33.55±10.82,复发转移组MVD值为56.78±16.17,两组间MVD值的差别有极显著性意义(P<0.001)。VEGF阳性细胞率与MVD值的关系经Spearman等级相关检验,两者呈显著正相关(r=0.845,P<0.01)。结论:VEGF和MVD是估计骨巨细胞瘤预后的新指标,VEGF是重要的促血管生成因子。  相似文献   

5.
Background The myocardial ATP sensitive potassium channel (K(ATP) channel) has been known for more than two decades, the properties of this channel have been intensively investigated, especially the myocardial protection effect by opening this channel. Numerous studies, including hypothermic, using K(ATP) agonists to achieve a hyperpolarizing cardioplegic arrest, have shown a better myocardial protection than potassium arrest. However, there is no evidence showing that K(ATP) channel could be opened by its agonists under profound hypothermia. We investigated the effect of temperature on activation of myocardial K(ATP) channel by nicorandil.Methods Isolated ventricular myocytes were obtained by collagenase digestion of the hearts of guinea pigs and stored in KB solution at 4&#730;C. With a steady ground current, the myocytes were perfused with 1 mmol/L nicorandil until a steady IK(ATP) occurred. Then the cells were perfused with 1 mmol/L nicorandil plus 1 &micro;mol/L glybenclamide. Currents signals were recorded on whole cells using patch clamp technique at several temperatures. The temperature of the bath solution around myocytes was monitored and was controlled at 4&#730;C, 10&#730;C, 20&#730;C, 25&#730;C and 35&#730;C respectively. About 10 cells were tested at each temperature, the cells were considered useful only when the outward current could be induced by nicorandil and blocked by glybenclamide. All data were analyzed using Graphpad PRISM 3.0 (Graphpad, San Diego, CA, USA). Nonlinear curve fitting was done in Clampfit (Axon) or Sigmaplot (SPSS). Results At 4&#730;C, 10&#730;C, 20&#730;C, 25&#730;C and 35&#730;C, the time needed to open the myocardial K(ATP) channel was (81.0±0) minutes, (50.5±11.7) minutes, (28.8±2.3) minutes, (9.4±10.2) minutes and (2.3±1.0) minutes respectively (P=0.003). The linear relationship between temperature and time needed to open the channel was y (min) = (4348.790-124.277x)/60, where y (min) is time needed to open K(ATP) channel, x is temperature, correlation coefficient r =-0.942 (P=0.00), regression coefficient b =-124.277 (P=0.00). The current densities among different temperatures were statistically different (P=0.022), the current density was greater after the activation of K(ATP) channel at higher temperatures. The lower the temperature, the fewer cells in which K(ATP) channels could be opened. At 4&#730;C, only one cell in which the K(ATP) channel could be opened, took a quite long time (81 minutes) and the I-V curve was quite untypical.Conclusions K(ATP) channel activated by nicorandil is temperature dependent and the temperature linearly related to time needed to open K(ATP) channel; the lower the temperature, the longer the time needed to open channel and the smaller the current density. At profound hypothermia, it is difficult to activate K(ATP) channels.  相似文献   

6.
目的 探讨腹泻型肠易激综合征(D-IBS)患者结肠黏膜中肥大细胞与症状的相关性. 方法 通过免疫荧光法检测肥大细胞在结肠黏膜的分布与计数,酶联免疫实验(ELISA)检测类胰蛋白酶的含量,通过Spearman相关性分析检验肥大细胞计数与症状的相关性. 结果 肥大细胞主要分布于结肠黏膜固有层腺体之间.D-IBS患者肠黏膜肥大细胞明显高于健康对照组(P<0.05),肥大细胞计数与腹痛严重程度相关(r =0.35,P<0.05).D-IBS患者结肠黏膜类胰蛋白酶含量高于健康对照组(P<0.01). 结论 D-IBS患者结肠黏膜中的肥大细胞数目增多与腹痛程度有关,可能是因为肥大细胞活化后类胰蛋白酶等产物释放增加调节内脏感知.  相似文献   

7.
以POLYGEN软件中的CHARMm程序和集团坐标轮换法,对合成的12个甲磺酰胺苯乙胺类化合物的结构进行计算机分子模拟。根据所得化合物的能量最低构象,计算了其VDW体积、偶极矩、总键能、总键角能、总非正则能以及氮原子电荷等值,并对这些化合物进行CNDO/2法量化计算,这些计算结果作为结构参数分别与12个化合物抗心律失常活性进行相关分析,以逐步回归法建立了两个相关性较好的方程:lgl/MEC=6.9991-0.3842X2+3.6796X5[n=12,r=0.855975,s=0.189672,F=12.33464>F1-0.05(3,9)=3.86];lgl/MEC=14.7038-213.2692X4-10.4829X5[n=12,r=0.931919,s=0.133047,F=29.71354>F1-0.01(3,9)=6.99]。结果提示,这类化合物的抗心律失常活性与分子中的原子轨道杂化程度和氮原子对分子HOMO和LU-MO的贡献有关,可以看出,氮上的取代不同会引起抗心律失常活性的不同  相似文献   

8.
生物发光法测定PC12细胞微量ATP含量   总被引:1,自引:0,他引:1  
目的 研究生物发光法测定PC12细胞内腺苷三磷酸 (ATP)含量的可行性及短暂缺氧血清剥夺再灌注后ATP含量的动态变化。方法 将PC12细胞随机分为正常对照组、缺氧组 ,测定短暂缺氧血清剥夺再灌注后不同时间点的ATP含量和细胞活性 ,对缺氧组ATP含量与细胞活性进行相关性分析。结果 与正常对照组相比 ,缺氧血清剥夺 15min再灌注1h后的ATP含量、细胞活性显著降低 ,差异具有显著性意义 (P <0 .0 5 ) ;缺氧血清剥夺 15min再灌注 6h后基本恢复至正常水平。缺氧组ATP含量与细胞活性呈显著正相关 (r=0 .90 4 ,P <0 .0 5 )。结论 生物发光法测定PC12细胞内ATP含量有较高的准确性。短暂缺氧血清剥夺再灌注后 ,存在低能量状态 ,且可完全恢复。  相似文献   

9.
目的了解慢性乙型肝炎病毒(HBV)感染者肝脏病理特征,探讨其与血清学关系。方法采用回顾性分析方法,收集114例慢性HBV感染者,所有患者均行肝穿刺组织活检,同时检测肝功能、HBeAg和HBVDNA定量,分析肝组织炎症分级(G)和纤维化分期(S)与HBeAg状态、HBVDNA水平的关系。结果114例患者中,113例(99.12%)患者肝组织发生病理改变,53例(46.49%)患者肝脏炎症分级和/或纤维化分期≥G2/$2。HBeAg阴性和HBeAg阳性患者年龄、血小板计数、HBVDNA水平差异有统计学意义,2组炎症分级差异无统计学意义(P〉0.05),纤维化分期差异有统计学意义(P〈0.05),Spearman相关性分析显示HBeAg与炎症分级和纤维化分期无关(r=-0.006,r=-0.147,P〉0.05)。HBVDNA定量分层分析,≤5lg拷贝/ml组、6—7lg拷贝/ml组和≥8lg拷贝/ml组HBeAg阴性患者分别为47例(83.93%)、8例(19.15%)和0例,≤5lg拷贝/ml组和其余2组比较有统计学差异(P〈0.05)。3组肝组织学≥G2/S2分别为33例(58.93%)、18例(42.86%)、2例(12.5%),≥8lg拷贝/ml组和其余2组比较差异有统计学(P〈0.05)。Spearman相关性分析显示HBVDNA水平与纤维化分期负相关(r=-0.279,P〈0.05),与炎症分级无关(r=-0.091,P〉0.05)。结论绝大部分慢性乙型肝炎病毒感染者有不同程度肝组织病理变化;HBeAg阴性患者较HBeAg阳性患者有更为严重肝脏病理变化,HBeAg状态与肝脏炎症和纤维化程度无关,HBVDNA水平和肝脏纤维化程度相关。  相似文献   

10.
小鼠X射线照射:0.05、0.25、0.5、0.75、1.0Gy后24小时检查外周血白细胞数、淋巴细胞绝对值、骨髓有核细胞计数和骨髓CFU—GM存活率。0.5Gy照射可引起白细胞总数和淋巴细胞减少。0.05Gy即可引起骨髓CFU—GM存活率明显降低。白细胞计数、淋巴细胞绝对值、骨髓有核细胞计数,CFU—GM存活率皆随照射剂量增加呈线性减低。  相似文献   

11.
肝癌局部树突状细胞和记忆T淋巴细胞与患者预后的关系   总被引:5,自引:0,他引:5  
Cai XY  Qiu SJ  Wu ZQ  Ye SL  Fan J  Zhou J  Tang ZY 《中华医学杂志》2005,85(10):671-675
的探讨肝细胞癌(以下简称肝癌)局部免疫状况与患者预后的关系。方法选取123份肝细胞癌石蜡标本HE染色,判断癌结节内及癌周淋巴细胞浸润情况。免疫组化方法检测树突状细胞(DC)、记忆T淋巴细胞的数目及分布,双重免疫组化方法检测两者之间的关系,分析局部免疫细胞的类型、数目及分布与患者预后的关系。结果癌结节与癌周淋巴细胞数目、分级与无瘤生存期无显著相关(P=0.054,0.071)。癌结节中一定数目的DC(≥25个/10个高倍视野)与无瘤生存期相关(P=0.000)。癌结节中的记忆T细胞数目与无瘤生存期直接相关(P=0.003),癌结节中DC和记忆T细胞的数目相关(r=0.531,P=0.000)。DC浸润多者无瘤生存率较高(P=0.001)。结论癌结节中:DC浸润多者无瘤生存率较高,提示DC在激活T细胞、诱导免疫反应中的重要性,可作为有效的复发转移预测指标之一。  相似文献   

12.
【目的】探讨系统性红斑狼疮(systemic lupus erythematosus,SLE)患者外周血中16T细胞的变化及临床意义。【方法】选取46例SLE患者(实验组)、18名健康人(对照组),采用流式细胞分析仪分析技术检测其外周血中CD3^+、γδT细胞绝对数及百分率。【结果】与健康组相比,SLE患者18T细胞绝对计数明显低于健康对照组(P〈0.01),且其γδT细胞凋亡率显著高于健康对照组细胞凋亡率(P〈0.05)。活动期SLE患者叮6T细胞绝对数明显低于非活动期(P〈0.05),且与红细胞沉降率(erythrocyte sedimentation rate,ESR)及SLE疾病活动指数(SLE disease activity index,SLEDAI)评分均呈负相关(r=-0.282,r=-0.378,P=0.028,P=0.037),但与血红蛋白浓度呈正相关(r=0.287,P=0.006)。【结论】SLE患者外周血中γδT细胞数量下降,且与病情活动相关;γδT细胞数量下降的机制可能与凋亡增加有关。  相似文献   

13.
OBJECTIVE: To investigate the clinical value in the measurement of parameters of the dose-response curve (DRC) obtained after the methacholine challenge test. METHODS: Twenty-seven cases of cough variant asthma (CVA), 29 of mild asthma, 19 of moderate asthma, and 15 healthy volunteers underwent the methacholine challenge test. The dose-response curves were constructed. The following parameters were calculated: position (PC35sGaw), dose-response curve (DRS), ratio of the area under the curve to the logarithm of the maximal concentration (AUC/lg[Cmax]) and maximal response. RESULTS: A plateau appeared in 11 cases among the healthy subjects, while a plateau appeared only in 2 cases of CVA and 2 of asthma. There were no significant differences among the asthmatic groups in the measurements of PC35sGaw and AUC/lg[Cmax] (geometric mean PC35sGaw: mild asthmatics = 0.369, moderate asthmatics = 0.251, cough variant asthmatics = 0.547), AUC/lg[Cmax] was significantly greater in the asthmatic groups than in the normal group [AUC/lg [Cmax](mean +/- s): mild asthmatics = 24.7 +/- 4.7, moderate asthmatics = 26.6 +/- 4.3, cough variant asthmatics = 25.6 +/- 3.7, normal subjects = 15.5 +/- 4.3, P < 0.01]. DRS of moderate asthmatics was significantly greater as compared with cough variant asthmatics (geometric mean DRS: mild asthmatics = 30.761, moderate asthma-tics = 59.020, cough variant asthmatics = 19.231, P < 0.05), but there was no difference between the other groups. PC35sGaw was negatively correlated with DRS (r = 0.866, P < 0.001) and with AUC/lg[Cmax] (r = 0.502, P < 0.001). CONCLUSION: Four parameters of DRC obtained after the methacholine challenge represent airway sensitivity and reactivity respectively. The parameters of DRC of asthmatic patients are different from those of normal subjects. The sensitivity is related to the reactivity, but they are not completely parallel with each other.  相似文献   

14.
Forty-one patients with untreated tropical pulmonary eosinophilia (TPE) were studied to determine whether there was any relationship between lower respiratory tract inflammation and either changes in lung function or abnormalities in chest roentgenograms. Total number of inflammatory cells in bronchoalveolar lavage (BAL) fluid, consisting of alveolar macrophages, lymphocytes, eosinophils and neutrophils had significant negative correlations with transfer factor (TLCO) (r = 0.519, p less than 0.001), transfer coefficient (KCO) (r = 0.312, p less than 0.05) and total lung capacity (TLC) (r = 0.352, p less than 0.05). The absolute count of eosinophils in BAL fluid had a significant negative correlation with TLCO (r = 0.430, p less than 0.01) and KCO (r = 0.300, p = 0.05), but not with forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1) or TLC. However, the absolute count of alveolar macrophages had a significant negative correlation with FVC (r = 0.343, p less than 0.05), FEV1 (r = 0.341, p less than 0.05) and TLC (r = 0.305, p less than 0.05), but not with TLCO or KCO. The total number of lymphocytes had a negative correlation with TLC (r = 0.315, p less than 0.05). There was no correlation between the types of cells recovered in BAL fluid and changes in chest radiographs as assessed by the ILO classification for occupational lung diseases. These data suggest that there may be a dissociation of pulmonary pathophysiological changes produced by different inflammatory cells in the lower respiratory tract. Macrophages and lymphocytes may produce more harm to the lung, as evidenced by significant negative correlations of these cells with lung volumes.  相似文献   

15.
Zhai S  Wang ZJ 《中华医学杂志》2011,91(30):2108-2111
目的 观察2型糖尿病患者腹腔内脏脂肪面积(VA)与24 h尿白蛋白排泄率(24 h-UAE)的关系.方法 收集河北医科大学第三医院内分泌科住院的2型糖尿病患者一般临床资料、VA、腹部皮下脂肪面积(SA)、24 h-UAE、血脂、空腹血糖、糖化血红蛋白、胰岛素水平和肿瘤坏死因子(TNF)-α.根据VA的四分位数分为4组:A组(VA<131 cm2);B组(131 cm2≤VA<174 cm2);C组(174 cm2≤VA<218 cm2);D组(VA≥218 cm2).比较4组间24 h-UAE水平和大量蛋白尿患病率,同时分析VA 与对数[lg(24 h-UAE)]的相关强度和线性关系.结果 C和D组的24 h-UAE大于A和B组,随着VA增加,大量蛋白尿患病率增加;VA与lg(24 h-UAE)存在相关(r=0.51);VA每增加100 cm2,lg(24 h-UAE)增加0.26个单位,校正相关因素的影响后VA每增加100 cm2,lg(24 h-UAE)增加0.15个单位.在校正性别、甘油三酯的影响后,C组与A组比较,发生大量蛋白尿的危险上升到2.75倍,D组与A组比较,发生大量蛋白尿的危险上升到3.87倍.结论 VA增加是24 h-UAE增多的危险因素,随着VA的增加,大量蛋白尿患病率增加.
Abstract:
Objective To decipher the association of visceral adiposity (VA) with 24-hour urinary albumin excretion (24 h-UAE) in type 2 diabetics.Methods We collected the clinical data, VA, subcutaneous adiposity (SA), 24 h-UAE, blood lipids, fasting blood glucose, glycosylated hemoglobin, insulin and tumor necrosis factor (TNF)-α of type 2 diabetic inpatients at our hospital. According to the quartile of VA, the subjects were divided into 4 groups. And their profiles were compared with regards to the level of 24 h-UAE and the incidence of heavy proteinuria. And their relative intensities and the linear relationship of VA and lg (24 h-UAE) were analyzed.Results lg (24 h-UAE) of groups C and D was larger than that of groups A and B. With the rising level of VA, the prevalence of heavy proteinuria increased. A moderate correlation existed between VA and lg (24 h-UAE)(r=0.51).lg (24 h-UAE) increased 0.26 units as VA expanded 100 cm2, i.e. 0.15 units after relative factor adjusting. After gender and triglyceride adjusting, the odds ratio of heavy albuminuria in group C was 2.75 versus that in group A. And the OR was 3.87 in group D.Conclusion Expansion of VA is a risk factor for an elevated risk of 24 h-UAE. With the expansion of VA, the prevalence of heavy albuminuria increases.  相似文献   

16.
系统性红斑狼疮患者外周血干细胞的研究   总被引:1,自引:0,他引:1  
应用甲基纤维素体外培养法对25例系统性红斑狼疮(SLE)患者进行外周血红系造血干细胞(BFU—E)及粒单系造血干细胞(CFU一GM)测定.结果显示活动期患者两者均显著低于正常人(P<0.01,P<0.01)及非活动期患者(P<0.01,P<0.05).去除患者外周血中的单核细胞及T淋巴细胞并不能使之恢复正常.BFU—E及(CFU一GM的降低与血清IgG的浓度呈负相关(r=-0.58,P<0.01及r=-0.49,P<0.01),与抗双链DNA抗体也呈负相关(r=-0.65,P<0.01及r=-0.57,P<0.01).而患者外周血白细胞计数则与CFU-GM呈正相关(r=0.61,P<0.01).提示患者血清IgG的异常增高可导致患者红系、粒单系造血干细胞的减少.它们的减少是SLE活动有价值的指标.  相似文献   

17.
人肝癌HepG2细胞超微弱发光的观察   总被引:3,自引:0,他引:3  
目的:探讨人肝癌HepG2细胞系超微弱发光的特征。方法:用IFFM—D型流动式化学发光仪检测人肝细胞株QZG及人肝癌HepG2细胞系超微弱发光的强度以及不同浓度鲁米诺(Luminol)和双氧水(H2O2)对其超微弱发光的影响。结果:在10^-4mol/L鲁米诺及0.3%双氧水条件下,人肝癌HepG2细胞超微弱发光强度明显高于人肝细胞株QZG(P〈0.05),并随细胞浓度增高其超微弱发光强度呈线性增高,其差异显著(P〈0.05);提高鲁米诺浓度为10^-3mol/L时,人肝癌HepG2细胞发光强度明显增加(P〈0.05);提高双氧水浓度为3%时,其超微弱发光强度的变化无显著差异(P〉0.05)。结论:人肝癌HepG2细胞的超微弱发光强度明显高于人肝细胞株QZG,细胞浓度及鲁米诺、双氧水浓度变化能影响细胞超微弱发光强度。超微弱发光反映了肿瘤细胞的功能状态,检测肿瘤细胞超微弱发光强度可作为一项敏感的肿瘤细胞生理及代谢指标。  相似文献   

18.
以葛根黄豆甙元为先导化合物。设计合成9个衍生物,在结构鉴定的基础上,做了油/水分配系数和抗缺氧活性等测定。按Hansch模型进行拟合,经数学处理,结果得到lg1/C=3.347+0.7375lgP-0.07229(lgp)~2的抛物线形式的定量构效关系方程,初步揭示了这类化合物的结构与其抗缺氧活性之间的定量关系,为进一步筛选最佳化合物作心血管药物提供了重要依据。  相似文献   

19.
20.
目的:探讨肺腺癌肿瘤相关巨噬细胞(TAM)浸润和血管内皮生长因子(VEGF)-C表达、淋巴管生成的相关性,以及它们与临床病理特征之间的关系。方法:应用免疫组化SP法分别检测53例肺腺癌和10例肺良性病变中CD68、VEGF-C和VEGFR-3表达,并计数TAM、VEGF-C阳性指数和VEGFR-3阳性淋巴管密度(LVD)。结果:①肺腺癌和肺良性病变中均可见CD68阳性巨噬细胞,但前者计数明显高于后者(P<0.01);肺腺癌VEGF-C阳性率和阳性指数均明显高于肺良性病变(P<0.01,P<0.01);肺腺癌和肺良性病变VEGFR-3阳性率之间无统计学差异(P>0.05),但前者VEGFR-3阳性LVD明显高于后者(P<0.01)。②肺腺癌TAM计数与淋巴结转移、P-TNM分期密切相关(P<0.05,P<0.05),VEGF-C阳性指数也与淋巴结转移、P-TNM分期密切相关(P<0.01,P<0.05),VEGFR-3阳性LVD只与淋巴结转移密切相关(P<0.01)。③肺腺癌TAM计数和VEGF-C阳性指数、VEGFR-3阳性LVD之间均呈正相关(r=0.338,P<0.05;r=0.410,P<0.01);VEGF-C阳性指数和VEG-FR-3阳性LVD之间也呈正相关(r=0.653,P<0.01)。结论:TAM能够促进肺腺癌VEGF-C表达和淋巴管生成,可能进而促进了淋巴结转移。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号