硒对培养人内皮细胞脂质过氧化损伤的保护作用

以巯基氧化剂联胺引发培养人内皮细胞脂质过氧化损伤,从形态和功能两方面,研究了硒对内皮细胞损伤的保护作用。结果表明:硒可抑制联胺引起的细胞内过氧化脂质蓄积,减轻细胞收缩反应、生物膜系统损伤和前列环素合成障碍等。硒可能在动脉粥样硬化防治中有重要意义。     

氢过氧化枯烯对培养人血管内皮细胞的损伤作用

本实验用氢过氧化枯烯作用于培养的人脐带静脉内皮细胞,探讨脂质过氧化对血管内皮细胞的作用。结果表明,氢过氧化枯烯激发和促进了内皮细胞的脂质过氧化过程,使内皮细胞的过氧化脂质含量升高。在形态结构上内皮细胞出现收缩和生物膜系统的损伤。用放射免疫方法测定,内皮细胞培养液中的6-keto-PGF_1α含量减少,表明PGI_2的产生受到抑制。上述变化可认为:内皮细胞对脂质过氧化的作用是敏感的,提示脂质过氧化通过损伤内皮细胞,可能在动脉粥样硬化发病机理中起重要作用。     

血管内皮细胞脂质过氧化对平滑肌细胞和纤维母细胞DNA…

为探讨血管内皮细胞受脂质过氧化作用后对中膜平滑肌细胞增殖的影响，以氢过氧化枯烯作为引发剂引发培养牛主动脉内皮细胞的过氧化瓜在，测定其内皮细胞条件培养液对培养的牛主动脉中膜平滑肌细胞和Ｓｗｉｓｓ３Ｔ３细胞ＤＮＡ合成的影响。结果：氢过氧化枯烯作用后，内皮细胞脂质过氧化物的含量明显增加；各实验组均未见明显的形态改变和乳酸脱氢酶含量的增加；由氢过氧化枯烯作用后，内皮细胞的条件培养使平滑肌细胞和Ｓｗｉｓｓ３     

氢过氧化亚油酸对家兔动脉内皮细胞的损伤作用

用不同浓度氢过氧化亚油酸(LAH)作用于家兔隔离颈动脉段3～5min,于不同时间处死动物。在光镜、电镜下观察过氧化脂质引起的动脉内皮细胞(EC)损伤。结果主要表现为EC的收缩,通透性升高和以质膜泡形成为特点的生物膜系统损伤,以及单核细胞(MC),平滑肌细胞(SMC)的反应。     

血管内皮细胞脂质过氧化对平滑肌细胞和纤维母细胞DNA合成的影响

为探讨血管内皮细胞受脂质过氧化作用后对中膜平滑肌细胞增殖的影响，以氢过氧化枯烯作为引发剂引发培养牛主动脉内皮细胞的过氧化反应，测定其内皮细胞条件培养液对培养的牛主动脉中膜平滑肌细胞和Ｓｗｉｓ３Ｔ３细胞ＤＮＡ合成的影响。结果：氢过氧化枯烯作用后，内皮细胞脂质过氧化物的含量明显增加；各实验组均未见明显的形态改变和乳酸脱氢酶（ＬＤＨ）含量的增加；由氢过氧化枯烯作用后，内皮细胞的条件培养液使平滑肌细胞和Ｓｗｏｓｓ３Ｔ３细胞的〔３Ｈ〕－ＴｄＲ掺入率明显增高。可以认为：脂质过氧化作用使内皮细胞对平滑肌细胞和纤维母细胞的增殖促进活性增强。为阐明脂质过氧化作用促进和加重体内动脉粥样硬化病变形成的机理提供了实验资料。     

脂质过氧化对培养心肌细胞的损伤作用

应用氢过氧化枯烯作用于培养的心肌细胞,观察到心肌细胞及培养液中脂质过氧化物含量增加,细胞膜流动性下降,细胞维生素E含量减少,~3H—TdR掺入率降低,细胞内酶类漏出增加以及细胞超微结构改变。表明氢过氧化枯烯激发和促进了培养心肌细胞的脂质过氧化过程,提示以氢过氧化枯烯作用于培养心肌细胞,可作为估价体外心肌细胞脂质过氧化损伤的模型之一。     

超氧化物歧化酶对人内皮细胞脂质过氧化损伤的保护作用

本实验首次应用超氧化物歧化酶(SOD)作用于培养的人血管内皮细胞,在细胞的形态结构和PGI_2合成功能方面,观察SOD抗氧化性损害的作用。结果表明:SOD能使氢过氧化枯烯引发的内皮细胞脂质过氧化物蓄积明显减少;使脂质过氧化作用引起的细胞收缩、生物膜系统改变和PGI_2合成减少的程度减轻。SOD可能通过减轻内皮细胞的过氧化损伤而对动脉粥样硬化有防治作用。     

氢过氧化枯烯对培养心肌细胞DNA的影响

应用氢过氧化枯烯作用于体外培养大鼠心肌细胞，观察其对ＤＮＡ的影响。结果表明，氢过氧化枯烯引起心肌细胞￣３Ｈ－ＴｄＲ掺入降低、ＤＮＡ断裂，脂质过氧化物含量增加。提示氢过氧化枯烯引发了心肌细胞的脂质过氧化过程，说明培养心肌细胞ＤＮＡ对自由基损伤作用是敏感的。     

脂质过氧化和抗氧化作用对培养人内皮细胞的影响——冷冻复型的电镜观察

首次应用冷冻复型方法对培养人血管内皮细胞的内部结构进行观察,表明内皮细胞的冷冻复型样品所显示的细胞器结构清晰,立体感强;对膜性系统的观察结果与扫描电镜和透射电镜下常规样品观察结果相符,而在显示细胞表面的小孔和核膜孔方面优于以前的电镜方法。并观察了氢过氧化枯烯和硒作用下内皮细胞膜性系统的改变,进一步探讨脂质过氧化与抗氧化作用对细胞的影响。     

硒对不同价态锰诱导的SH-SY5Y神经细胞脂质过氧化的影响

为研究硒对不同价态锰诱导的人神经母细胞瘤细胞 (SH SY5Y细胞 )脂质过氧化的影响 ,把SH SY5Y细胞分为空白对照组、二价锰损伤组、硒二价锰保护组、三价锰损伤组、硒三价锰保护组。空白组为对照 ,硒保护组用硒预处理 4h ,然后与锰损伤各组分别加入相应二价锰和三价锰 ,使二价锰和三价锰的终浓度为 0 .5mmol/L ,共同培养2 4h。测定细胞中的过氧化物歧化酶 (SOD)、丙二醛 (MDA)、谷胱甘肽过氧化氢酶 (GSH Px)的活性及计算抗氧化指数 (GSH Px/MDA)。结果显示 ,硒二价锰保护组、硒三价锰保护组的SOD、GSH Px酶的活性及抗氧化指数与相应的二价锰损伤组、三价锰损伤组相比均有不同程度的升高 (P <0 .0 5 ) ,而MDA的质量摩尔浓度则均有所下降。提示 :硒对不同价态锰诱导神经细胞产生的脂质过氧化有抑制作用。     

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.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.