M_3R介导的cAMP-PKA信号途径对L-型钙通道的调控作用研究

目的研究M3受体激动剂通过cAMP-PKA信号途径对L-型钙通道的影响。方法应用全细胞膜片钳技术记录M3受体激动剂胆碱对大鼠单个心室肌细胞L-型钙通道电流(ICa-L)的影响;采用激光扫描共聚焦技术观察细胞内钙离子的变化。结果胆碱使大鼠心室肌细胞ICa-L密度从(9.07±0.68)pA/pF减少至(5.58±0.62)pA/pF(n=4,与对照组相比,P<0.01),H89加胆碱组使ICa-L电流密度减少至(7.68±0.75),幅度明显高于胆碱组(n=4,与胆碱组相比,P<0.01)。胆碱抑制KCl除极诱导的心肌细胞[Ca2+]i的升高,从(2.83±0.08)降至(1.17±0.09)FI/FI0(n=30,与KCl组相比,P<0.01),胆碱与H89组可使[Ca2+]i降至(1.65±0.17)FI/FI0,幅度高于胆碱组(n=30,与胆碱组相比,P<0.05)。结论 M3受体激动剂胆碱通过抑制PKA活性调控L-型钙通道,使外钙内流减少,降低细胞[Ca2+]i,从而发挥抗心肌保护作用。     

雌激素对大鼠心肌细胞钙的调控作用研究

目的　观察雌激素对大鼠心肌细胞钙转运的调控作用 .方法　应用膜片钳全细胞记录方法观察 L型钙通道电流 (ICa.L) ,共聚焦显微镜系统分析细胞内钙浓度 ([Ca2 +]i)的变化 .结果　应用 10 μmol· L- 1和 30 μmol· L- 1的 17β- Estradiol,分别使 ICa.L抑制到正常的 (4 8.1± 4.5 ) %和 (2 9.3± 5 .2 ) % (n=5 ,P<0 .0 1) . 10μmol· L- 1 的 17β- Estradiol可升高静息的培养心肌细胞[Ca2 +]i,荧光强度 (FI)值由 5 4.2± 13.6增加到 86 .5± 15 .3(n=6 ,P<0 .0 1) ;而对具有自发收缩的心肌细胞钙瞬变幅度有明显的抑制作用 ,由给…     

缺血预处理对兔冠脉急性缺血再灌注期间血小板聚集率的影响

目的　研究缺血预处理 (IPC)对实验性冠脉急性缺血再灌注期间血小板聚集率的影响及腺苷的作用 .方法　建立兔在体心脏缺血预处理模型 (n=14 ) ,用智能血液凝仪测定血小板聚集率 ,高效液相色谱测定心肌组织及血液腺苷含量 .结果　 IPC组缺血再灌注期间血小板聚集率无明显升高 ,与缺血前比较 (P>0 .0 5 ) ,与对照组比较差异显著 (P<0 .0 1) ,IPC组血液腺苷含量 (3.0 1± 0 .0 2 ) mg· L- 1 高于对照组(2 .2 5± 0 .19) mg· L- 1 (P<0 .0 5 ) ;心肌腺苷含量 (0 .85±0 .0 4 ) m g· g- 1与对照组 (0 .2 7± 0 .0 2 ) mg· g- 1比较差异显著 (P<0 .0 1) ,缺血前静滴腺苷可使血小板聚集率显著下降 .结论　 IPC可使实验性冠脉急性缺血再灌注期间血液和心肌腺苷含量明显升高 ,血小板聚集率显著下降 ,而腺苷参与了IPC对心肌缺血的保护作用 .     

几种阿魏酸衍生物高分子药物对血小板聚集和血栓素B2、6-酮-前列腺素FIa 产生的影响

目的通过测定兔血小板聚集和血栓素B2 (TXB2) 、6-酮-前列腺素FIa (6-keto-PGFla ) 的含量,比较观察阿魏酸(F)、吲哚美辛(I)、阿魏酸-吲哚美辛结合物(FI)和阿魏酸-吲哚美辛-淀粉高分子载体衍生物(FIS)在抗血栓方面的药理作用特点.方法用比浊法和放免法测定F、I、FI和FIS在体外对兔血小板聚集和对TXB2,6-keto-PGFla 生成的影响.结果 F、I、FI和FIS显著地抑制ADP和AA诱导的兔血小板聚集和TXB2,6-keto-PGFla 的产生.在12.5～240 m mol/L的剂量范围内,对血小板聚集的抑制率,F为11.3%～31.8%(ADP诱导)和3.3%～18.5%(AA诱导)、I为3%～34.3%(ADP诱导)和 2%～20.2%(AA诱导)、FI为5.0%～59.3%(ADP诱导)和0.3%～63.1%(AA诱导)、FIS为3.1%～39.1%(ADP诱导)和1.5%～39.6%(AA诱导).剂量为240.0 m mol/L时对TXB2和6-keto-PGFla 产生的抑制率,F为14.8%和1.2%、I为24.9%和26.2%、FI为40.6%和29.3%、FIS为28.7%和21.4%.6-keto-PGFla 与TXB2的比值,对照组为2.0,F组为2.4、I为2.0、FI为2.4、FIS为2.2.结论在等物质的量浓度下,FI、FIS对AA诱导的兔血小板聚集及其对TXB2和6-keto-PGFla 释放的抑制作用显著强于阿魏酸和吲哚美辛本身,且能使6-keto-PGFla 与TXB2的比值增加.     

吡啶-2，6（1H，3H）二酮生物碱对兔血小板聚集和TXB2，6-keto-PGF1α产生的影响

目的　研究吡啶 - 2 ,6 (1H,3H)二酮生物碱 (SH1 )对二磷酸腺苷 (ADP) ,花生四烯酸 (AA)和胶原 (COL )诱导兔血小板聚集和 TXB2 和 6 - keto- PGF1α生成的影响 .方法　用比浊法和放射免疫法 .结果　 SH1 0 .8～ 3.0 m mol·L- 1能显著地抑制 2 .0 μmol· L- 1 ADP,33.3μmol· L- 1 AA和 2 0 .0 g· L- 1 COL 诱导的兔血小板聚集并有良好的量效关系 .SH13 .0 mmol· L- 1 抑制 TXB2 产生 ,而增加 6 - keto- PGF1α产生 ,并因此 6 - keto- PGF1α和 TXB2 的比值增加 .结论　 SH1 显著抑制血小板聚集和 TXB2 产生 ,同时增加 6 - keto- PGF1α产生 .     

N-苄基氟哌啶醇氯化物对大鼠血管平滑肌细胞内钙离子的影响

目的:动态观察N_苄基氟哌啶醇氯化物(F3)对大鼠胸主动脉平滑肌细胞内Ca2+的影响。方法:用Ca2+荧光染料Fluo_3_AM负载大鼠胸主动脉平滑肌细胞,在激光扫描共聚焦显微镜上测定细胞内游离钙的变化。结果:在含CaCl2(1.26mmol/L)的细胞外液中,30 mmol/L KCl使细胞内钙荧光强度(FI)迅速增强,F3可以拮抗KCl诱导钙FI增强作用,并呈量效依赖和时间依赖关系。4种浓度F3(0.01、0.1、1.0、10μmol/L)作用3 min时,使KCl诱导细胞内钙FI从(81±4)%分别降至(71±18)%(n=20,P<0.05)、(51±12)%(n=20,P<0.01)、(39±14)%(n=20,P<0.01)、(28±14)%(n=20,P<0.01)。钙FI变化最快的时程是在给药后的0~30 s。结论:F3通过阻断细胞膜电压依赖性钙通道降低平滑肌细胞内钙浓度,这可能是其扩张血管,改善心肌缺血的机制。     

缩胆素诱导兔Oddi括约肌细胞钙动员途径

目的　探讨 CCK引起兔 Oddi括约肌细胞收缩的钙动员机制 .方法　取新西兰兔 Oddi肌组织 ,进行原代细胞培养 .将培养的 4- 7代细胞行 Fluo- 3/AM负载 ,用激光共聚焦显微镜测量不同拮抗剂对 CCK诱导的细胞内 Ca2 +增加的影响 .结果　不加拮抗剂 10 - 7m ol· L- 1 CCK使细胞内 Ca2 +增加 (130± 43) %,用 EGTA+维拉帕米阻断细胞外钙离子内流时 ,CCK诱导细胞 Ca2 +增加 (10 4± 2 3) %,而用肝素时细胞内Ca2 +增加值为 (2 3± 19) %,加入普鲁卡因后细胞内 Ca2 +增加(85± 37) %.同其他组对比 ,肝素明显抑制了 CCK诱导的Ca2 +升高 (P<0 .0 1) .结论　 CCK通过动员细胞内 IP3 敏感钙库的钙离子引起 Oddi细胞 Ca2 +升高 ,该途径可以被肝素所抑制     

G蛋白参与K物质对心肌细胞内游离钙离子浓度的影响

目的　观测 K物质对体外培养的乳鼠心肌细胞内游离钙离子浓度的影响 ,并探讨作用机制 .方法　应用钙离子荧光指示剂 Fluo- 3AM负载原代培养的大鼠心肌细胞 ,通过流式细胞仪检测心肌细胞内游离钙离子浓度 ([Ca2 + ]i)变化 ;分别应用速激肽受体拮抗剂 - DSP和抗水解 GDP类似物 -GDPβS,观察二者对 K物质诱导的 [Ca2 + ]i变化的影响 .结果　 SK能升高 [Ca2 + ]i,即由对照组的 173± 2 0 nmol· L- 1升高至 2 84± 2 0 nmol· L- 1 (P<0 .0 1) ,且在 1.78× 10 - 5～ 1.78×10 - 7mol· L- 1 浓度范围内存有剂量 -效应关系 ;DSP和GDPβS均可阻断 SK诱导的心肌细胞 [Ca2 + ]i升高的效应 .结论　SK可升高心肌细胞 [Ca2 + ]i,其作用有 G蛋白参与     

冠状动脉小支架置入术对血小板功能及临床疗效的影响

目的　通过术中采集冠状静脉窦血的方法 ,探讨冠状动脉内小支架置入术对冠脉循环中血小板功能的影响及临床应用的可行性 .方法　 39例冠心病患者经冠状动脉造影证实至少有一支血管狭窄大于等于 5 0 % (直径法 ) ,术前进行充分抗血小板治疗后 ,按置入的支架大小分成直径在 2 .5～2 .75 mm之间的小冠脉支架组 (15例 )和支架直径在 3.0～ 4.5 mm之间的对照组 (2 4例 ) ,分别于术前、术中及术后 1min和 10 m in采集冠状静脉窦血 ,放免法测定血浆血小板 α-颗粒膜蛋白 (GMP- 140 )及血栓素 B2 (TXB2 )的浓度 .术后随访 6mo,比较两组的临床疗效 .结果　两组在球囊预扩张后即刻各血小板功能指标均轻度增高 ;支架置入后即刻小支架组GMP- 140由术前的 (7.5 5± 0 .36 ) μg· L- 1升至 (9.83± 0 .78)μg· L- 1 (P<0 .0 5 ) ,对照组由 (7.5 1± 0 .34 )μg· L- 1 升至(9.6 0± 0 .38)μg· L- 1 (P<0 .0 5 ) ;小支架组 TXB2 由术前的(2 47± 2 7) ng· L- 1 升至 (399± 2 3) ng· L- 1 (P<0 .0 1) ,对照组 TXB2 由 (2 33± 17) ng· L- 1升至 (385± 19) ng· L- 1 (P<0 .0 1) ;支架后 10 min两组 GMP- 140降至术前水平 ,TXB2 有下降趋势 .两组组间比较各个时间点血小板活性变化趋势一致 ,均无差异 .两组围手     

电针对应激大鼠血浆EGF和CGRP及胃粘膜损伤的影响

目的　观察电针对应激大鼠胃粘膜损伤的保护作用及对血浆表皮生长因子 (EGF)和降钙素基因相关肽 (CGRP)水平的影响 .方法　将 72只大鼠平均分为空白对照组、应激组和电针组 ,每组再按实验时间 1,3和 5 d平均分为 3小组 (n= 8) ,利用放免分析法测定各组大鼠血浆 EGF,CGRP含量并计算各组溃疡计数 (UI)水平的变化 ,以分析其相互关系 .结果　应激组较空白对照组大鼠血浆 EGF明显下降 (0 .44±0 .16 ) μg· L- 1 → (0 .2 3± 0 .0 1) μg· L- 1 ,P<0 .0 5 ;UI明显上升 (1.1± 0 .4)→ (2 8.0± 4.1) ,P<0 .0 1.电针组较应激组比较血浆 EGF水平明显上升 (0 .2 3± 0 .0 1)μg· L- 1 → (0 .42± 0 .0 9) μg· L- 1 ,P<0 .0 5 ;血浆 CGRP水平明显上升 (145± 6 ) ng· L- 1 → (184± 2 2 ) ng· L- 1 ,P<0 .0 5 ;UI明显下降(2 8.0± 4.1)→ (19.0± 2 .3) ,P<0 .0 1.电针组中血浆 CGRP实验 5 d组较实验 1d组明显上升 (184± 2 2 ) ng· L- 1→ (2 32± 35 ) ng· L- 1 ,P<0 .0 1.结论　电针对胃粘膜的损伤有保护作用 ,血浆 EGF,CGRP参与了电针对胃粘膜的保护作用机制 .电针调节 CGRP与针刺时间有关     

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.