SERUM LEVELS OF VASCULAR ENDOTHELIAL GROWTH FACTOR IN PATIENTS WITH ANGINA PECTORIS AND ACUTE MYOCARDIAL INFARCTION

ＩＮＴＲＯＤＵＣＴＩＯＮ　　Ｖａｓｃｕｌａｒｅｎｄｏｔｈｅｌｉａｌｇｒｏｗｔｈｆａｃｔｏｒ (ＶＥＧＦ)ｏｒｖａｓｃｕｌａｒｐｅｒｍｅａｂｉｌｉｔｙｆａｃｔｏｒ (ＶＰＦ)ｃｏｎｓｉｓｔｓｏｆａｆａｍｉｌｙｏｆｐｏｌｙｐｅｐｔｉｄｅｉｓｏｆｏｒｍｓｔｈａｔｓｐｅｃｉｆｉｃａｌｌｙｒｅｇｕｌａｔｅｅｎｄｏｔｈｅｌｉａｌｃｅｌｌｆｕｎｃｔｉｏｎ ,ｉｎｃｌｕｄｉｎｇｅｎｈａｎｃｅｍｅｎｔｏｆａｎｇｉｏｇｅｎｅｓｉｓ( 1) ,ｅｎｈａｎｃｅｍｅｎｔｏｆｍｉｃｒｏｖａｓｃｕｌａｒｐｅｒｍｅａｂｉｌｉｔｙ ( 2 ) ,ａｎ…     

慢性肾功能衰竭大鼠下丘脑组织和血浆食欲素A及神经肽Y水平的变化及其意义

目的　探讨大鼠慢性肾功能衰竭 (CRF)动物模型的下丘脑组织和血浆食欲素A及神经肽Y(NPY)水平的变化及其意义。方法　将 41只 2 0 0～ 2 50 g雄性Wister大鼠分为 :正常组、假手术组和CRF组。术后 4、 8、 1 2周分批断头处死大鼠 ,取血浆和下丘脑组织标本。用放射免疫法测定血浆和下丘脑组织食欲素A和NPY。用生化自动分析仪测定血清肌酐。结果　CRF大鼠术后4、 8和 1 2周血肌酐水平均高于假手术组。其术后 1 2周的血浆食欲素A水平高于假手术组 (2 64pg/ml± 62pg/mlvs 1 83pg/ml± 56pg/ml,P =0 0 39)。CRF大鼠术后 1 2周的下丘脑食欲素A水平明显低于假手术组 (1 0 5fmol/mg± 2 7fmol/mg湿重vs 1 7 4fmol/mg± 3 9fmol/mg湿重 ,P =0 0 2 3)。CRF大鼠术后 8周 (7 1 pmol/ml± 1 7pmol/mlvs 5 0 pmol/ml± 0 5pmol/ml,P =0 0 1 )和1 2周 (7 9pmol/ml± 1 1pmol/mlvs 4 8pmol/ml± 1 1 pmol/ml,P =0 0 0 0 8)的血浆神经肽Y水平高于假手术组 ,其术后 1 2周的下丘脑神经肽Y水平明显低于假手术组 (70fmol/mg± 2 3fmol/mgvs1 1 3fmol/mg± 31fmol/mg湿重 ,P =0 0 33)。 结论　 (1 )CRF大鼠血浆食欲素A和NPY水平有逐渐增高趋势 ,肾功能减退可能导致食欲素A和NPY排泄障碍。 (2 )CRF时下丘脑组织食欲素     

急性心肌梗死患者血浆VEGF、SDF-1和外周血CD34+细胞的动态改变及其意义

目的研究急性心肌梗死时血管内皮细胞生长因子(VEGF)、基质细胞衍生因子(SDF-1)以及外周血CD34 细胞的动态改变,探讨其在心肌梗死(心梗)中的作用。方法采集急性心梗患者发病第1、3、7、10、14天外周静脉血,应用酶联免疫方法检测心梗患者以及对照组患者血VEGF和SDF-1的水平。应用流式细胞仪检测心梗患者第1、7、14天外周血CD34 细胞的水平。同时对心梗患者进行心肌酶、肌钙蛋白、心电图及心脏超声等常规检查。结果(1)心梗后第7天外周血CD34 细胞(个/μl)明显增高(2.35±0.72vs1.48±0.49,P<0.05);(2)心梗后血VEGF(pg/ml)明显升高,于第14天达到高峰(197.56±39.87vs53.79±18.12,P<0.01);(3)心梗第1天血SDF-1(pg/ml)明显降低(1683.12±224.79vs2178.67±265.34,P<0.01),以后渐恢复至与对照组相同水平;(4)心梗第7天VEGF水平与外周血CD34 细胞高峰值之间有明显相关性;(5)VEGF高峰值与CK-MB高峰值和肌钙蛋白I之间均有明显相关性。结论心肌梗死本身即可动员干细胞至外周血;心梗后VEGF明显升高至少可持续2周以上,SDF-1短暂降低;两者的动态变化可能与干细胞动员及促使更多干细胞归巢至损伤心肌有关。     

Vascular endothelial growth factor expression in serum of patients with hepatocellular carcinoma

Objectives To determine the pre-therapeutic serum level of vascular endothelial growth factor (VEGF) in patients with hepatocellular carcinoma (HCC) and to elucidate the relation between the serum level and clinical characteristics and metastasis of HCC. Methods One-hundred and fifteen HCC patients, 40 patients with benign liver lesions, and 30 healthy control subjects were included in this study. The serum VEGF level was measured with the quantitative sandwich enzyme linked immunosorbent assay (ELISA, R&amp;D systems). Results The serum VEGF levels in the HCC group (465.62±336.24 pg/ml) was significantly elevated as compared with those in patients with benign liver lesions (159.54±120.58 pg/ml) and those in normal controls (123.53±51.84 pg/ml). The VEGF levels were not significantly different between the patients with benign liver lesions and the normal controls. The serum VEGF concentration showed a positive rate of 77.4%, 25%, and 3.3% in the HCC patients, benign liver lesion patients and normal controls, respectively. In the 115 HCC patients, the serum VEGF levels in patients with portal vein (PV) emboli (n=26, 582.76±441.89 pg/ml), with metastasis (n=43, 548.29±438.57 pg/ml) or with large HCC lesions (≥5 cm in diameter) (n=69, 554.43±369.99 pg/ml) were significantly higher than those without PV-emboli (n=89, 431.39±292.84 pg/ml), without metastasis (n=72, 416.24±247.27 pg/ml) or with small HCC lesions (n=42, 328.67±227.47 pg/ml). The serum VEGF levels in stage Ⅰ, Ⅱ, Ⅲ, Ⅳa and Ⅳb HCC patients were 340.6 pg/ml, 451.55±307.84 pg/ml, 397.44±257.18 pg/ml, 486.10±397.73 pg/ml and 647.93±344.56 pg/ml, respectively. Conclusion The pre-therapeutic serum VEGF levels in HCC patients appear to reflect the disease’s potential activity of vascular invasion and metastasis.     

蛋白酶体抑制剂MG-132对心肌梗死后心衰大鼠心功能及心肌肌钙蛋白Ⅰ的影响

目的 探讨泛素蛋白酶体系统对心肌梗死后心衰大鼠心功能及心肌肌钙蛋白I的影响.方法 将制作成功的心肌梗死后心衰大鼠模型纳入研究,45只大鼠随机分为:①MG-132组:结扎左冠状动脉前降支,腹腔内注射MG-132 0.1 mg/(kg·d)(溶于2 ml生理盐水);②心肌梗死(MI)组:结扎左冠状动脉前降支,腹腔内注射2 ...     

蛭龙活血通瘀胶囊对心肌梗死大鼠血管新生的作用研究

目的：通过观察蛭龙活血通瘀胶囊对心肌梗死大鼠血管新生的影响,探讨蛭龙活血通瘀胶囊对心肌梗死大鼠模型心肌保护的可能机制。方法：采用冠状动脉左前降支动脉结扎法制备心肌梗死模型大鼠。健康SD大鼠60只,随机分为假手术组、模型组、蛭龙活血通瘀胶囊低、中、高剂量组、通心络组,每组大鼠10只。术后假手术组及模型组每日予生理盐水灌胃,其余各组分别给予相应药物灌胃14d。分别于术后7d、14d检测血清内皮生长因子（VEGF）;术后14d免疫组化检测梗死心肌边缘区新生血管数。结果：术后第7、14d,与假手术组比较,模型组、低、中、高剂量组及通心络组VEGF均升高,差异有统计学意义（P〈0．01）。各药物治疗组与模型组比较VEGF升高（P〈O．05）,其中高剂量组及通心络组升高明显,差异有统计学意义（P〈0．01）。与通心络组比较,低剂量组、中剂量组差异有统计学意义（P〈O．05）,高剂量组差异无统计学意义（P〉0．05）。MVC计数结果：与假手术组比较,模型组、低、中、高剂量组及通心络组均增加（P〈0．01）,与模型组相比,各药物治疗组MVC均升高（P〈0．01）。与通心络组比较,低剂量组、中剂量组差异有统计学意义（P〈O．05）,高剂量组差异无统计学意义（P〉O．05）。结论：蛭龙活血通瘀胶囊可促进心肌梗死边缘区新生血管形成,其机制可能与促进血清VEGF表达及维持VEGF高分泌状态有关。     

蛭龙活血通瘀胶囊对心肌梗死大鼠内皮祖细胞动员

目的：探讨蛭龙活血通瘀胶囊对急性心肌梗死（AMI）大鼠内皮祖细胞（endothelial progenitor cells,EPCs）动员。方法：结扎SD大鼠左冠状动脉前降支制作AMI模型,将32只大鼠随机分为4组：AMI组、蛭龙活血通瘀胶囊低剂量组1.56 g/kg/d（简称：低剂量组）、蛭龙活血通瘀胶囊高剂量组6.24 g/kg/d（简称：高剂量组）、和假手术组,术后24 h用药灌胃,1次/d,5周后计数外周血EPCs数量、免疫组化法测定血清血管内皮生长因子（VEGF）的数量。结果：术后5周与假手术组比较,AMI组、低剂量组和高剂量组的血清VEGF数量、外周循环EPCs数量均明显升高（P〈0.05）;术后5周与AMI组比较,低剂量组和高剂量组血清VEGF数量明显增加（P〈0.05）。结论：AMI大鼠5周后骨髓EPCs的动员增加,蛭龙活血通瘀胶囊能促进AMI大鼠骨髓EPCs的动员,增加循环EPCs数量,从而为临床治疗心肌梗死提供新的治疗措施。     

不同雌激素水平对大鼠血管内皮细胞功能及血管内皮细胞粘附分子1表达的作用

目的研究雌激素对雌鼠肺血管内皮细胞功能及血管内皮细胞粘附分子-1(VCAM-1)表达的调节。方法（1）雌性SD大鼠24只分为假手术组、去势组、治疗组,采用放射免疫法检测血清中内皮素、前列环素的含量,铜-镉还原法测定血清中一氧化氮的产量。放射配体结合法检测肺血管内皮细胞中雌激素受体含量。（2）正常雌鼠肺培养的第2代血管内皮细胞,按不同浓度17-β雌二醇(17-βE2)分为A组（对照）、B组（3×10-8mol/L17-βE2）、C组（3×10-7mol/L17-βE2）;D组（3×10-6mol/L17-βE2）、E组（3×10-6mol/L17-βE2+3×10-6mol/L他莫西芬）处理48h,白细胞介素-1β作用后流式细胞仪分别检测各组VCAM-1表达量。结果(1)去势组雌鼠血中一氧化氮（18μmol/L±8μmol/L）、前列环素（8.5pg/ml±2.5pg/ml）均降低,治疗组二者水平明显升高（31μmol/L±7μmol/L,P<0.05;10.9pg/ml±3.4pg/ml）,而内皮素含量变化则相反（170pg/ml±39pg/ml;100pg/ml±32pg/ml,P<0.05）。(2)去势组雌鼠血管内皮细胞中雌激素受体含量(fmol/106cell）显著降低（6.7±0.5),治疗组雌激素受体含量维持在高水平（17.6±1.2,P<0.01）。(3)白细胞介素-1β作用后A组表达VCAM-1细胞百分率明显增高（17.5%±1.5%）,B、C、D组表达VCAM-1细胞百分率显著降低（15.4%±1.42%、12.4%±0.34%、8.7%±0.27%,P<0.01）。结论雌激素水平可明显影响雌鼠血管内皮细胞内皮素、一氧化氮、前列环素的分泌,并可影响雌鼠血管内皮细胞中雌激素受体含量。雌二醇均可降低白细胞介素-1β诱发的雌鼠血管内皮细胞VCAM-1表达增高。     

Transplanted human umbilical cord blood mononuclear cells improve left ventricular function through angiogenesis in myocardial infarction

Background Human umbilical cord blood contains an abundance of immature stem/progenitor cells, which may participate in the repair of hearts that have been damaged by myocardial infarction (MI). This study aimed to evaluate the effects of human umbilical cord blood mononuclear cells (hUCBC) transplantation on cardiac function and left ventricular remodeling in rat model of MI. Methods Forty-five male Wistar rats were randomized into three groups: MI or control group (n=15), MI plus cell transplantation (n=15), and sham group (n=15). Acute myocardial infarction (AMI) was established by ligating the left anterior descending artery, thereafter, hUCBC were implanted into the marginal area of infarcted myocardium. In MI/control group, DMEM was injected instead of hUCBC following the same protocol. Left ventricular function assessment was carried out by echocardiography and invasive hemodynamic measurements one month post MI. All rats were sacrificed for histological and immunochemical examinations. Results The transplanted hUCBC survived and engaged in the process of myocardial repair in the host heart. Echocardiography demonstrated that left ventricular function improved significantly in the rats that underwent cell transplantation. Hemodynamic studies found a significantly decreased left ventricular end-diastolic pressure (LVEDP) [(21.08±8.10) mmHg vs (30.82±9.59) mmHg, P&lt;0.05], increase in +dp/dt(max) [(4.29±1.27) mmHg/ms vs (3.24±0.75) mmHg/ms, P&lt;0.05), and increase in －dp/dt(max) [(3.71±0.79) mmHg/ms vs (3.00±0.49) mmHg/ms, P&lt;0.05] among MI group with hUCBC transplantation when compared with MI/control group. Masson’s trichrome staining revealed that the collagen density in the left ventricle was significantly lower in rats of transplantation group than that in the MI control groups [(6.33±2.69)% vs (11.10±3.75)%, P&lt; 0.01]. Based on immunostaining of α-actin, the numbers of microvessels were significantly (P&lt;0.01) increased at the boundary of infarction site. Similarly higher mRNA expression of vascular endothelial growth factor (VEGF) 164 and VEGF188 were found at 7- and 28-day post cell transplantation in MI group with hUCBC transplantation when compared with MI/ control group.Conclusions Transplanted hUCBC can survive in host myocardium without immunorejection, significantly improve left ventricular remodeling after AMI and promote a higher level of angiogenesis in the infarct zones. All these factors beneficially affect cardiac repair in the setting of MI. Therefore human umbilical cord blood may be potential source for cell-based therapy for AMI.     

冠心病患者血浆尾加压素Ⅱ的临床研究

OBJECTIVE: To investigate the changes in plasma urotensin II(U II) expression levels in patients with coronary heart disease (CHD). METHODS: Plasma U II levels in 50 CHD patients with coronary stenosis indicated by coronary angiography and 20 healthy subjects were determined by radio immunoassay. RESULTS: Venous plasma U II levels were significantly lowered in CHD patients in comparison with the healthy subjects (1.61+/-1.02 pg/ml vs 3.70+/-1.30 pg/ml, P=0.000). In the CHD patient group, significantly differences were noted in the U II levels between patients with stable angina (2.62+/-1.20 pg/ml), unstable angina (1.39+/-0.80 pg/ml) and acute myocardial infarction (AMI, 1.04+/-0.45 pg/ml, P=0.004). CHD patients with coronary artery occlusion and those with only coronary stenosis had comparable venous plasma U II levels (1.29+/-1.02 pg/ml vs 1.76+/-1.00 pg/ml, P=0.131), whereas the patients with restenosis after percutaneous transluminal coronary angioplasty (PTCA) had higher U II levels than the other subjects in the CHD patient group (2.28+/-0.94 pg/ml vs 1.40+/-0.96 pg/ml, P=0.008), and the femoral plasma U II levels were significantly elevated after PTCT, increasing from 1.18+/-1.14 pg/ml to a postoperative level of 2.22+/-1.77 pg/ml (P=0.001). CONCLUSION: U II might play a role in the pathophysiological process of CHD and can be involved in the restenosis after angioplasty.     

泼尼松对IL-8在COPD大鼠肺组织表达的影响

目的 研究IL-8在慢性阻塞性肺病(COPD)大鼠肺组织中的表达及泼尼松对其表达的影响.方法 Wistar大鼠24只随机分为:正常对照组(A组)、单纯熏烟组(B组)和熏烟 泼尼松组(C组),每组各8只.单纯熏香烟法建立COPD模型,C组于熏香烟前予泼尼松5 mg/kg隔日灌胃.模型建立后,行支气管肺泡灌洗,测定支气管肺泡灌洗液(BALF)中细胞数,酶联免疫吸附法(ELISA)测定BALF上清液和血清中的IL-8和TNF-α浓度,并对肺组织切片行苏木精-伊红(HE)染色观察形态学改变,采用图像分析系统定量测定肺平均内衬间隔(MLI)、平均肺泡数(MAN)和肺泡腔面积与总面积比(PAA).结果 B组MLI、PAA比A组增高,而MAN低于A组,C组与B组相比MLI、PAA降低,MAN升高,差异均有统计学意义(P＜0.01).与A组比较,B组BALF中IL-8、TNF-α、白细胞总数、中性粒细胞绝对计数和中性粒细胞百分比均增高(P＜0.05),C组较B组上述指标均下降(P＜0.05).B组血清中IL-8和TNF-α浓度亦比A组增高(P＜0.05),C组较B组下降,但IL-8的浓度差异无统计学意义.B组BALF中IL-8与中性粒细胞绝对计数、TNF-α呈正相关(r=0.735、0.987,P＜0.05);与血清中IL-8和TNF-α、血气分析的所有指标及形态学定量分析的任一指标均无相关性.血清IL-8与上述任一指标亦均无相关性.结论 BALF中的IL-8与COPD的气道炎症密切相关,IL-8与TNF-α相互作用,通过趋化激活中性粒细胞等炎性细胞共同参与COPD发病.泼尼松可能通过抑制IL-8的表达,从而减轻炎症介质和炎性细胞对气道的损害,延缓COPD的进展.     

替普瑞酮对类固醇致胃黏膜损伤的保护作用

目的研究替普瑞酮对类固醇激素所致胃黏膜损伤的保护作用及其机制。方法50只雄性SD大鼠随机分为空白组、实验对照组、低剂量替普瑞酮组、中剂量替普瑞酮组和高剂量替普瑞酮组,每组10只。采用泼尼松龙皮下注射制备大鼠胃黏膜损伤模型,低、中、高剂量组替普瑞酮的剂量分别为50、100、200mg/kg,给药7d,每天1次。观察胃黏膜的病理变化,计算溃疡指数、胃黏膜组织学损伤指数,放射免疫法检测血浆内皮素1和胃黏膜前列腺素E2(PGE2)水平,Griess法检测血清NO含量。结果类固醇激素能引起胃黏膜显著出血性损伤,实验对照组大鼠溃疡指数中位数为44.5,组织学损伤指数中位数为5.5,明显高于空白组(均为0,均P<0.01);实验组大鼠血浆内皮素1水平为399pg/ml±74pg/ml,高于空白组(279pg/ml±56pg/ml,P<0.01);血浆NO水平(27μmol/L±5μmol/L)低于空白组(36μmol/L±5μmol/L,P<0.01);胃黏膜PGE2水平(154pg/mg±83pg/mg)低于空白组(337pg/mg±112pg/mg,P<0.01)。低、中、高剂量替普瑞酮组的溃疡指数中位数分别为32.5,23.0,23.0,均明显低于实验组(均P<0.01);组织学损伤指数中位数分别为3.0,3.0,1.5,均明显低于实验组(均P<0.01),内皮素1水平分别为299pg/ml±99pg/ml,284pg/ml±85pg/ml,189pg/ml±32pg/ml,均明显低于实验对照组(P<0.05,P<0.01,P<0.01);NO水平分别为56μmol/L±16μmol/L,62μmol/L±12μmol/L,83μmol/L±9μmol/L,均明显高于实验对照组(均P<0.01),高剂量替普瑞酮组胃黏膜PGE2水平为241pg/mg±65pg/mg,明显高于实验组154pg/mg±83pg/mg(P<0.05)。溃疡指数、组织学损伤指数和内皮素1水平随替普瑞酮剂量的增大而降低,血清NO、胃黏膜PGE2水平随替普瑞酮剂量的增大而升高。结论替普瑞酮对类固醇致胃黏膜损伤具有一定的保护作用,其机制可能与降低内皮素1水平和增加NO和PGE2生成有关。     

强力霉素、氯沙坦及其合用防治大鼠急性心肌梗死后左室重构的作用

目的对比强力霉素、氯沙坦及其合用对大鼠急性心肌梗死(AMI)左室重构的防治作用.方法461只雌性SD大鼠,其中30只设为假手术组(仅在冠脉下穿线,不结扎);另外431只大鼠行冠脉前降支结扎致AMI,术后24 h存活的254只大鼠随机分为下列各组:(1)AMI对照组64只;(2)强力霉素组(30 mg·kg-1·d-1)63只;(3)氯沙坦组(10 mg·kg-1·d-1)62只;(4)强力霉素(30 mg·kg-1·d-1)和氯沙坦(10 mg·kg-1·d-1)合用组65只.依疗程不同,将上述各组再均随机分为1、2和4周3个亚组.给药满疗程后各组均行血流动力学测定、心脏标本固定和病理分析.结果最终157只大鼠获完整资料.AMI对照及3个治疗组各亚组间的梗死面积差异均无显著性(P＞0.05).与假手术组相比,AMI对照组的左室舒张末压(LVEDP)、实际和相对重量(LVAW和LVRW)在各时间亚组均显著增加(P＜0.05,P＜0.01,P＜0.001),且LVEDP在4周比1和2周时升高更显著(P＜0.01);而左室内压最大上升和下降速率及其与左室收缩压的比值仅在4周时显著降低(P＜0.001).与AMI对照组相比,强力霉素、氯沙坦及其合用3个治疗组的LVEDP在各时间亚组均显著降低(P＜0.05,P＜0.01,P＜0.001);LVAW和LVRW仅在氯沙坦和合用组的2和4周亚组,以及强力霉素组的4周亚组显著减轻(P＜0.05,P＜0.01,P＜0.001);而左室内压最大下降速率和左室内压最大上升和下降速率与左室收缩压的比值仅在3个治疗组的4周亚组显著增加(P＜0.05,P＜0.01).上述各指标在3个治疗组的各时间亚组间差异均无显著性(P＞0.05).结论强力霉素和氯沙坦均能有效防治大鼠AMI左室重构,改善左室收缩和舒张功能,且作用相当,而两药合用似无叠加效应,值得进一步研究.     

强力霉素、氯沙坦及其合用对大鼠急性心肌梗塞后非梗塞区心肌金属蛋白酶和金属蛋白酶组织抑制因子表达及胶原重构的影响

目的对比基质金属蛋白酶(MMP)抑制剂强力霉素、血管紧张素Ⅱ受体-1阻断剂氯沙坦及其合用对急性心肌梗塞(AMI)大鼠左室非梗塞区心肌MMP-8和13、MMP组织抑制因子(TIMP)-1和2的表达及胶原重构影响.方法对431只雌性SD大鼠行冠状动脉前降支结扎致AMI,然后将术后24h存活的254只随机分人下列各组:(1)AMI对照组(n=64);(2)强力霉素组(30mg·kg-1·d-1,n=63);(3)氯沙坦组(10mg·kg-1·d-1,n=62);(4)强力霉索(30 mg·kg-1·d-1)和氯沙坦(10 mg·kg-1·d-1)合用组(n=65),并开始给药治疗;同时另设假手术组(n=30).依疗程不同,将上述各组再均分为1、2和4周3个亚组.以RT-PCR和Western blot法测定非梗塞区两种MMP和TIMP的mRNA和蛋白表达;免疫组织化学染色测定非梗塞区Ⅰ/Ⅲ型胶原含量(CVF).结果AMI对照及3治疗组各亚组问梗塞面积差异均无显著性(P均＞0.05).与假手术组相比,AMI对照组的MMP-8和13蛋白表达在各时间亚组均显著增高(P均＜0.05),mRNA表达则在1和4周亚组显著增高(P均＜0.05);TIMP-l mRNA和蛋白表达仅在1周亚组显著增高(P均＜0.05);TIMP-2 mRNA表达在各时间点亚组均显著增高(P均＜0.05),而蛋白表达仅在2和4周亚组均显著增高(P均＜0.05);同时非梗塞区Ⅰ/Ⅲ型CVF在各时间亚组也均显著升高(P＜0.05～0.001).与AMI对照组相比,3治疗组对大鼠AMI后MMP-8、13和TIMP-l、2 mRNA和蛋白表达的增强均有显著抑制作用(P均＜0.05);使Ⅰ型CVF在其2和4周亚组显著减少(P＜0.05～0.001);Ⅲ型CVF仅在氯沙坦和合用组的2和4周亚组显著减少(P＜0.05～0.01),在强力霉素组则于各时间点亚组均无显著变化(P均＞0.05).上述指标在3治疗组间对比,仅在部分时间点亚组间差异有显著性(P均＜0.05).结论强力霉素和氯沙坦一样,能够有效抑制大鼠AMI后非梗塞区心肌MMP-8、13和TIMP-1、2 mRNA和蛋白表达的增强及Ⅰ型胶原的沉积,但对Ⅲ型胶原则无此作用.     

外周血血管内皮生长因子在垂体腺瘤患者的表达

目的探讨外周血中血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达水平是否可反映垂体腺瘤的生物行为.方法以203例垂体腺瘤患者、22例垂体增生患者、7例垂体Rathke囊肿患者及3例垂体脓肿患者为研究对象,并以20例正常献血者为对照组,用酶联免疫吸附法测定各组外周血中VEGF水平.结果在垂体疾病患者中,垂体腺瘤患者的血清VEGF水平为(366.8±211.1)pg/ml,垂体增生患者为(286.8±107.6)pg/ml,分别高于垂体Rathke囊肿患者(180.5±61.7)pg/ml、垂体脓肿患者(147.5±46.3)pg/ml和正常对照组(180.8±56.2)pg/ml,差异均具有显著性(P＜0.05).在垂体腺瘤患者中,大腺瘤(380.0±234.5)pg/ml和巨大腺瘤(380.1±280.3)pg/ml分别高于微腺瘤(294.6±111.6)pg/ml和垂体增生,差异有显著性差异(P＜0.05).而血清VEGF在垂体腺瘤是否具有侵袭性生长、卒中、囊性变和激素分泌类型上表达无差异(P＞0.05).结论外周血VEGF水平可反映垂体腺瘤生长大小的生物学行为,不能反映垂体腺瘤是否具有侵袭性生长、出血卒中、囊性变及激素分泌类型.检测外周血中VEGF水平对垂体腺瘤与垂体Rathke囊肿、垂体脓肿的鉴别可能具有一定的参考价值.     

心肌缺血大鼠血浆8-异前列腺素F2α水平及N-乙酰半胱氨酸干预作用

OBJECTIVE: To examine the correlation between 8-iso-prostaglandin F2alpha (8-iso-PGF2alpha) levels in the plasma and myocardial tissue of rats with myocardial ischemia and observe the intervention effect of N-acetylcysteine (NAC), for the purpose of assessing the value of 8-iso-PGF2alpha in estimating the extent of free radical damage and implementing possible interventions. METHODS: Forty-five Wistar rats were divided into ischemia, ischemia+NAC and control groups, and in the former 2 groups, acute myocardial ischemia models were produced by pituitrin. Elevated ST segment in ECG served as the indicator for myocardial ischemia. Rats in ischemia+NAC group were pre-treated with NAC (0.1 g/kg x d) for three weeks before the ischemia 8-iso-PGF2alpha levels in the plasma and myocardial tissue were determined by enzyme-linked immunosorbent assay (ELISA). RESULTS: In ischemia group, the 8-iso-PGF2alpha levels in the plasma and myocardial tissue were 187.4+/-45.8 pg/ml and 259.3+/-47.5 pg/g, respectively, higher than those in the control group (60.4+/-13.7 pg/ml and 88.6+/-16.9 pg/g, respectively, P<0.01) and those in ischemia+NAC group (88.2+/-16.4 pg/ml and 109.4+/-24.7 pg/g, respectively, P<0.01). A positive correlation was noted between the 8-iso-PGF2alpha levels in the plasma and myocardial tissue (r=0.865, P<0.01). In comparison with the control group, elevation of the ST segment of ECG in rats with myocardial ischemia was obvious, and the peak elevation occurred 45 min after ischemia (0.34+/-0.05 mV, P<0.01). Pre-treatment with NAC proved to help alleviate the subsequent ischemia, with ST segment elevation of only 0.18+/-0.05 mV. CONCLUSION: In condition of acute myocardial ischemia in rats, 8-iso-PGF2alpha levels tend to increase, which can be indicative of the degree of myocardial ischemia. NAC pre-treatment can alleviate the ischemic condition by offsetting the damage caused by the free radicals.     

艾迪注射液对乳腺癌患者血清VEGF水平的影响

目的观察艾迪注射液对乳腺癌患者血清血管内皮生长因子（VEGF）的影响,探讨其对乳腺癌的治疗作用。方法46例乳腺癌患者随机分为对照组（单纯化疗）、实验组（化疗加艾迪注射液）,每组23例。另收集30例健康人做为健康对照组。应用双抗体夹心EMSA法检测两组乳腺癌患者治疗前后血清VEGF水平变化。结果化疗前乳腺癌患者血清VEGF水平明显高于对照组（P〈0．01）,其水平与患者年龄、肿瘤大小、组织学分级无关（P均〉0．05）,与患者淋巴结转移、临床分期有关（P均〈0．01）。新辅助化疗前乳腺癌患者血清VEGF明显高于健康对照组[（285．17±57．58）pg／ml傩（152．17±26．45）pg/ml,P〈0．01];实验组治疗前、后血清VEGF水平分别为（289．30±61．50）、（210．13±52．12）pg／ml,差异有统计学意义（P〈0．01）;对照组治疗后血清VEGF水平与治疗前相比差异无统计学意义（P〉0．05）;实验组治疗后VEGF水平低于对照组[（210．13±52．12）pg／mlvs（261．46±54．29）pg／ml,P〈0．01]。结论艾迪注射液可以降低乳腺癌患者血清VEGF水平,通过抑制肿瘤血管生成进而抑制肿瘤细胞的增殖、浸润及转移,从而发挥抗肿瘤作用,在乳腺癌辅助抗肿瘤治疗中起着重要作用。     

Chronic treatment of enbrel in rats with isoproterenol- induced congestive heart failure limits left ventricular dysfunction and remodeling

Objective To investigate the effect of chronic treatment of enbrel (EB), a TNF- α antagonist, in a well defined congestive heart failure (CHF) rat model and test the hypothesis that chronic treatment of EB in CHF rats may limit the progression of Left ventricular (LV) dysfunction and structure remodeling and decrease cardiac IL- 1β levels. Methods We measured cardiac conformation, contractile performance and cytokines level in 8 age- matched normal adult rats (control group) and 8 rats with isoproterenol (ISO)- induced Heart failure (ISO group) and 8 rats with ISO- induced lesion but received EB treatment (EB group). Results LV end diastolic diameter and LV end systolic diameter in EB group were significantly less and LV fractional shortening was significantly larger than ISO group (9. 2±0. 3 mm vs 9. 5±0. 2 mm, 5. 8±0. 5 mm vs 6. 5±0. 3 mm, 0. 37±0. 03 vs 0. 31±0. 02,P&lt;0. 05,P&lt;0. 01,P&lt;0. 01 respectively）, but there was no significant difference of LV posterior wall thickness at end diastole between the two groups; LV end systolic pressure (P ES ), dp/dt max in EB group were significantly greater than ISO group (104. 8±4. 6 mm Hg vs 98. 4±4. 9 mm Hg, 8395±940 mm Hg/s vs 6898±612 mm Hg,P&lt;0. 05,P&lt;0. 01 respectively), and LV end diastolic pressure (P ED ), dp/dt min , time constant of LV relaxation were significantly lower than ISO group (3. 8±0. 6 mm Hg vs 7. 1±0. 8 mm Hg, -5963±475 mm Hg/s vs -5030±316 mm Hg/s, 15. 4±0. 8 ms vs 21. 3±1. 4 ms,P&lt;0. 01, respectively）. Although cardiac contractile performance in the EB group was greatly improved, there still was a big gap when compared with the control group. The ratio of LV weight to body weight in the EB group was significantly higher than control group （2. 82±0. 07 mg/g vs 2. 28±0. 08 mg/g,P&lt;0. 01）, but there was no significant difference when compared with the ISO group. There was no significant difference between the serum level of TNF- α in EB group and ISO group, the it could not be detected in control group. TNF- α levels in LV of EB group was significantly higher than control group, （757. 6±46. 8 pg/g vs 367. 5±22. 7 pg/g,P&lt;0. 01）, but there was no significant difference when compared with ISO group. The IL- 1β level in LV of EB group was significantly lower than ISO group （356. 2±28. 5 pg/g vs 518. 4±32. 5 pg/g,P&lt;0. 05）, and it could not be detected in control group. The serum level of IL- 1β could not be detected in any rats. Conclusion EB administered as soon as possible when ISO induced myocardial necrosis occurs can greatly improve cardiac contraction, and the improvement may be partly due to a decrease in the IL- 1β level in LV, besides the direct blocking effect of EB on TNF- α. EB can alleviate cardiac remodeling by its effect on LVEDD.      

参附注射液对新生大鼠缺氧缺血性脑损伤干预作用的实验研究

目的研究参附注射液对新生大鼠缺氧缺血性脑损伤(HIBD)的干预作用。方法建立新生大鼠HIBD模型,把实验分成两部分(1)观察缺氧缺血后3、7、14和28d各组新生大鼠的体重变化以及各组28d内生存率。(2)流式细胞术测量缺氧缺血前2h,缺氧缺血后2h、12h、24h、3d、7d、14d和28d各时间点新生大鼠海马CA1区神经元的凋亡率,每组实验随机分为4组(每组20只)假手术组,生理盐水对照组,参附预处理组,参附治疗组。结果缺氧缺血后3、7、14和28d,生理盐水对照组大鼠体重的增长均明显小于假手术组(7d8.8g±2.1gvs14.0g±2.9g,均P<0.01),且明显小于参附预处理组(7d11.7g±3.3g,P<0.01或P<0.05),缺氧缺血后7、14、28d生理盐水对照组大鼠体重的增长均明显小于参附治疗组(7d10.9g±2.7g,P<0.01或P<0.05)。各组的体重明显小于假手术组。生理盐水对照组存活率为60%(12/20),参附预处理组存活率为90%(18/20),参附治疗组存活率为85%(17/20),生理盐水对照组存活率明显低于其他各组(P<0.05),其余各组存活率差异无统计学意义(均P>0.05)。缺氧缺血后2h生理盐水对照组、参附治疗组、参附预处理组海马神经元凋亡率开始升高,于缺氧缺血后24h凋亡率达到峰值后开始下降,缺氧缺血后14d降到正常。参附治疗组和参附预处理组海马神经元凋亡情况明显好于生理盐水对照组(24h16.0%±4.2%vs11.9%±2.3%vs18.1%,P<0.05或P<0.01)。结论参附注射液减少了新生大鼠缺氧缺血后神经元凋亡的发生,改善了新生大鼠HIBD后的生长发育,提高了其生存率。     

缺氧诱导因子-1α表达与移植静脉再内皮化关系的实验研究

目的　探讨缺氧诱导因子 1α(HIF 1α)表达水平与移植静脉再内皮化的关系。方法　将6 0只Wistar大鼠随机分为实验组与对照组 ,前者行颈内静脉 颈总动脉移植术。于术后 7d与 14d切取移植静脉。分别采用反转录多聚酶链反应 (RT PCR)、Western印迹法、免疫组织化学及电镜等检测 ,观察HIF 1α和血管内皮生长因子 (VEGF)表达水平及再内皮化过程。结果　术后 7d与 14d相比较 ,移植静脉再内皮化显著 ;HIF 1αmRNA及其蛋白和VEGF蛋白表达增强 (P均 <0 0 1) ;增生内膜中HIF 1α阳性表达细胞增多。HIF 1α与VEGF表达呈正相关 (r=0 90 2 6 ,P <0 0 1)。结论HIF 1α与移植静脉内皮细胞增殖密切相关 ,其早期表达不足是引起内膜过度增生 (IH)的重要基因之一。