GITR抗体对L615白血病抑制作用的实验研究

目的探讨糖皮质激素诱导型TNF受体（glucocorticoid-induced tumor necrosis factor receptor．GITR）抗体对L615白血病（T淋巴细胞来源白血病）的抑制效应及其作用机制。方法以L615小鼠建立白血病模型．分3个实验组和1个阴性对照组,观察实验小鼠生存状态及时间,检测外周血白细胞计数及分类,外周血和骨髓中白血病细胞形态变化．肝脾指数．肝脾组织病理改变。结果GITR抗体使用组能延长L615白血病小鼠的生存时间．可引起骨髓中白血病细胞发生凋亡、坏死．肝脾指数降低。结论通过免疫调节机制GITR抗体能够有效地抑制L615白血病细胞的增殖．进而抑制白血病的发展。     

GITR抗体介导增强NK细胞杀伤活性的实验研究

目的 探讨糖皮质激素诱导的TNF受体家族相关受体(glucocorticoid-induced tumor necrosis factor receptorfamily related receptor,GITR)的抗体通过抑制Treg细胞的功能,进而增强NK细胞杀伤活性来对L615白血病细胞产生杀伤作用.方法 通过不同的给药方式将L615白血病小鼠设立为4个实验组,提取实验分组后的小鼠脾脏中NK细胞作为效应细胞,以L615白血病细胞作为靶细胞,在体外观察了NK细胞的杀伤活性变化情况,并运用RT-PCR,进一步观察了体现NK细胞杀伤活性的几个相关指标的变化.结果 GITR抗体可以明显增强小鼠脾脏中NK细胞的杀伤活性,具体表现为同NK细胞活性密切相关的3个指标穿孔素(Perforin),γ干扰素(IFN-γ),Fas的表达量明显增加.结论 GITR抗体能够通过Treg细胞的调节增强NK细胞的杀伤活性,进而有效的抑制L615白血病细胞.     

低剂量辐射对小鼠白血病的治疗作用

目的 观察低剂量辐射对小鼠白血病的治疗作用。方法 使用615小鼠和L615K淋巴细胞白血病细胞株建立T淋巴细胞白血病小鼠模型，给予75mGy的低剂量辐射，检测外周血白细胞变化、小鼠的生存时间及脾脏白血病细胞浸润情况。结果 接受75mGy的低剂量辐射后，荷瘤小鼠白血病细胞生长受抑制，生存期延长。结论 低剂量辐射具有抗淋巴细胞白血病的作用。     

GITR抗体介导增强NK细胞杀伤活性的实验研究

目的探讨糖皮质激素诱导的TNF受体家族相关受体（glucocorticoid-induced tumor necrosis factor receptor family related receptor．GITR）抗体通过调节Treg细胞和NK细胞的功能对L615白血病细胞增殖的影响．了解NK细胞对白血病细胞的杀伤活性。方法通过不同的给药方式将L615白血病小鼠设立为4个实验组．提取实验分组后的小鼠脾脏中NK细胞作为效应细胞．以L615白血病细胞作为靶细胞．在体外观察了NK细胞的杀伤活性变化情况．并运用RT-PCR进一步观察了体现NK细胞杀伤活性的几个相关指标的变化。结果GITR抗体可以明显增强小鼠脾脏中NK细胞的杀伤活性．表现为同NK细胞活性密切相关的3个指标穿孔素（Perforin）、γ干扰素（IFN-γ）、Fas的表达量明显增加。结论GITR抗体能够通过Treg细胞的调节增强NK细胞的杀伤活性,进而有效的抑制L615自血病细胞。     

低剂量辐射对白血病模型小鼠治疗作用研究

目的:探讨低剂量辐射对白血病模型小鼠的治疗作用.方法:使用615小鼠和L615K淋巴细胞白血病细胞株建立T淋巴细胞白血病小鼠模型,给予75 mGy的低剂量辐射后,检测外周血白细胞数、小鼠的生存时间及脾脏指数.结果:接受75 mGy的低剂量辐射后,荷瘤小鼠白血病细胞生长受抑,生存期延长.结论:低剂量辐射具有抗淋巴细胞白血病的作用.     

Cx43修饰人脐血源基质细胞输注阻抑白血病MRD小鼠造血干细胞移植后复发

目的 观察间隙连接蛋白43(connexin 43,Cx43)修饰人脐血源基质细胞(human umbilical cord blood-derived stromal cells,hUCBDSCs)体外对L615小鼠白血病细胞株凋亡以及在体对白血病微小残留病(minimal residual disease,MRD)小鼠疾病进展的影响.方法 通过Cx43过表达腺病毒(Ad-Cx43-GFP)上调hUCBDSCs中Cx43表达,体外构建L615+Cx43+hUCBDSCs共培养模型,检测其对L615细胞凋亡的影响.建立L615细胞低瘤负荷的MRD小鼠模型,分为骨髓(bone marrow,BM)移植组和Cx43+hUCBDSCs+ BM移植组进行移植,以正常L615小鼠作为对照,检测移植后外周血象、骨髓涂片、组织病理及骨髓Cx43表达变化等.结果 Ad-Cx43-GFP能够在mRNA和蛋白水平显著上调hUCBDSCs中Cx43表达.L615+Cx43+hUCBDSCs移植组L615细胞凋亡比例较对照组显著升高[(8.93±1.24)％ vs(3.53±0.13)％,P＜0.01].对MRD小鼠移植后,Cx43+hUCBDSCs+BM移植组外周血WBC和PLT恢复更快,17d时接近正常水平,而BM移植组外周血WBC和PLT恢复延迟,17 d时低于正常水平;17 d时,Cx43+hUCBDSCs+BM移植组骨髓涂片原始细胞比例较BM移植组显著降低[(7.67±1.25)％ vs (56.33±1.25)％,P＜0.01];与BM移植组比较,Cx43+hUCBDSCs+BM移植组肝、脾、骨髓的白血病浸润程度较低,同时骨髓中Cx43蛋白表达增加.结论 上调hUCBDSCs中Cx43表达能在体外促进L615细胞凋亡,Cx43+hUCBDSCs+BM联合移植能够促进MRD小鼠外周血WBC和PLT恢复,阻抑MRD小鼠移植后复发.     

瘀毒清对微小残留白血病作用的实验研究

目的：以615小鼠L7212微小残留白血病模型为工具,观察瘀毒清对模型小鼠骨髓有核细胞分类和白血病细胞百分率及小鼠存活时间的影响。方法：用FCM检测骨髓有核细胞DNA含量及细胞周期,并通过肝脾病理检查观察白血病细胞的肝脾浸润情况。结果：低剂量组和高剂量组白血病细胞百分率均较对照组低（P＜0．01）,而正常成熟细胞较对照组高（P＜0．05）,肝脾白血病细胞浸润程度则均较对照组轻,两个剂量组小鼠生存期均较对照组明显延长（P＜0．05）,尤以低剂量组更明显,生命延长率达194．22％;低剂量组G2和S期细胞百分率似较对照组有减低趋势。结论：瘀毒清有一定的抑制白血病细胞增殖作用。     

抗癌活性肽对荷白血病鼠的作用

目的 :探讨抗癌活性肽抑制白血病的效应。方法 :建立小鼠白血病模型 ;MTT法检测抗胃癌生物活性肽的抑制作用 ;光镜和电镜技术对癌细胞结构进行分析。结果 :抗胃癌生物活性肽对白血病小鼠细胞增殖有较好的抑制作用 ,抑制率为 45 %。光镜下计数白血病组外周血白细胞数为 2 5 .0× 1 0 9/L,电镜显示白血病组肝、脾有典型的癌细胞浸润 ,淋巴细胞大小及细胞器变化明显。抗胃癌生物活性肽治疗 7d外周血白细胞计数为 6.0×1 0 9/L,电镜显示肝、脾癌细胞浸润减少 ,淋巴细胞大小均一 ,细胞内细胞器变化趋于正常。结论 :抗胃癌生物活性肽 ( ACBP)有抑制白血病细胞增殖的作用     

紫金锭及其加味抗急性白血病的实验研究

本研究从血象、骨髓、病理、骨髓细胞增殖动力学的角度证明:紫金锭具有明显的抑制和杀伤实验白血病小鼠(L7212)白血病细胞的作用(主要影响细胞周期的S期),具有缓解、减轻白血病细胞对肝脾浸润,明显延长白血病小鼠生存期的作用,紫金锭和诸复方配伍,具有明显的协同作用。     

125I标记的Flt4多抗检测荷瘤小鼠前哨淋巴结的探讨

目的探讨不同接种方式制备的小鼠白血病模型的生物学特性。方法常规培养小鼠急性淋巴细胞白血病细胞系L1210,调整浓度至1×107个/ml,每只DBA/2小鼠注射细胞悬液0.1ml,分别给以静脉、皮下及腹腔注射。观察小鼠成瘤情况,定期计数各组小鼠外周白细胞数量及观察细胞形态改变,取濒死小鼠的肝、脾、肺、肾等脏器称重并制作病理切片。结果各组小鼠成瘤率均为100%,成瘤天数分别为:14、7和14d;平均存活天数分别为:24.4±3.05,24.8±1.79,18.8±1.79d。接种后2周外周血白细胞数目分别增加至18.45±1.84、22.0±4.11、28.48±6.74×109/L,接种后3周外周血白细胞数目分别增加至22.31±12.08×109/L(A组)和68.18±2.82×109/L(B组);外周血涂片中均可见白血病细胞;各组濒死小鼠肝、脾有弥漫性白血病细胞浸润,主要为幼稚淋巴细胞,正常组织结构破坏,肺和肾内有少量白血病细胞浸润,正常组织结构破坏不明显,肺脏有明显出血。结论静脉、皮下、腹腔注射体外培养的L1210细胞于DBA/2小鼠构建肿瘤动物模型的方法均是可行的方式,各种方法有不同的生物学特性和优缺点,可根据研究目的的不同,选用不同的接种方式。     

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.