电离辐射对胎鼠皮肤间充质干细胞支持骨髓粒系造血作用的影响

目的：观察不同剂量的X射线照射对体外培养的胎鼠皮肤间充质干细胞(MSCs)支持造血细胞增殖作用的影响,为提高造血干细胞体外扩增效率提供一种更为有效的方法,进而为造血干细胞移植提供一个新的途径。 方法：分别用不同剂量的X射线照射培养的胎鼠皮肤MSCs层,然后将骨髓细胞种植于该细胞层上,扩增后不同时间(0~12 d)进行骨髓CFU-GM集落培养,同时取经X射线照射的皮肤MSCs的上清液进行骨髓CFU-GM、CFU-E及BFU-E培养,观察射线对胎鼠皮肤MSCs造血支持作用的影响。 结果：6、8和10 Gy剂量X射线照射胎鼠皮肤MSCs与骨髓细胞共同作用7 d时,骨髓祖细胞集落显著增加,其中6 Gy组增加最为明显,CFU-GM是0 Gy组的2.17倍。6、8和10 Gy剂量X射线照射培养皮肤的上清液体外亦可刺激骨髓CFU-GM、CFU-E、BFU-E的生长,与0 Gy组比较差异均有显著性(P<0.05)。其中6 Gy组增加最为明显,分别达0 Gy组的1.81倍、3.94倍和3.51倍,集落亦明显加大。 结论：一定剂量X射线照射胎鼠皮肤MSCs,其体外支持造血的作用增强,无论照射后的单纯MSCs细胞层还是上清液都可使骨髓细胞集落数增多。     

多西紫杉醇的细胞毒性和体外放射增敏作用

目的:观察新的抗肿瘤药多西紫杉醇(Doxtaxol)细胞毒性和对体外放射增敏作用.方法:应用克隆形成分析多西紫杉醇对鼻咽癌细胞的细胞毒性和体外放射增敏作用.放射增敏作用研究采用药物浓度为半数抑制剂量(ID50).常规照射剂量2Gy时的放射增敏比(SERSF2)定义为2Gy时对照存活分数(SF)和药物处理组SF.结果:多西紫杉醇的细胞毒性呈剂量依赖性关系,ID50为3.2×10-8mg/ml.当3.2×10-8mg/ml多西紫杉醇作用3,6,12和24 h,各时间点均可见放射增敏效应.相应的放射增敏比SERD0分别为1.27,1.44,1.53和1.58;SERDq分别为1.40,3.20,5.0和7.5;SERSF2分别为1.38,2.2,3.0和3.4.结论:多西紫杉醇的细胞毒性呈剂量依赖性,对人鼻咽癌细胞系CNE1有明显的放射增敏作用,与时间相关.     

烧伤小鼠血清对离体培养的骨髓基质细胞的影响

目的 研究小鼠烧伤血清对离体培养的骨髓基质细胞的影响。方法 利用流式细胞仪、HE染色等技术观察小鼠烧伤后不同时间的血清对小鼠骨髓基质细胞（BMSC）贴壁率和基质祖细胞（CFU－F）集落形成的作用及对不同剂量的^60Coγ射线体外照射后的BMSC的影响。结果 小鼠烧伤后1－11d的血清对基质细胞贴壁率和CFU－F的形成主要表现为抑制作用，13－15d的血清主要表现为刺激作用。小鼠烧伤后15d的血清可明显减少50、70Gy照射后BMSC的凋亡和坏死。结论 小鼠烧伤后不同时间的血清对BMSC的作用不同，可能与血清内细胞因子的变化有关。     

电离辐射对造血细胞增殖发育及功能的影响

22只Wastar大鼠随机分为正常对照组和放射损伤组(~(60)Co-γ线8Gy全身一次照射)。以骨髓有核细胞计数,骨髓粒系祖细胞(CFU-GM)培养,骨髓及外周血红细胞微核发生率分析和外周血白细胞吞噬     

冬凌草甲素对食管癌干细胞放射增敏作用的研究

目的 研究冬凌草甲素(oridonin,ORI)对人食管癌细胞(ECCs)株Eca-109中食管癌干细胞的放射增敏作用.方法 32μg/mL冬凌草甲素处理的Eca-109细胞给予不同剂量照射,MTT法检测细胞增殖抑制作用,克隆形成实验检测细胞放射敏感性和克隆形成能力,流式细胞仪检测p75NTR的表达.结果 实验组和对照组增殖抑制率组间比较差异有统计学意义(P＜0.01).克隆形成实验放射增敏比为2.35.随着照射剂量的增加,实验组和对照组p75NTR的表达均呈增加趋势;0、2和4 Gy剂量照射后实验组p75NTR的表达均少于对照组.结论 ORI对Eca-109细胞有明显的增殖抑制作用和放射增敏作用,其增敏机帝l可能与增加食管癌干细胞的放射敏感性有关.     

放射损伤小鼠骨髓VEGF、CFU-GM、CFU-F的变化及川芎嗪对其影响的研究

目的:探讨放射损伤小鼠骨髓血管内皮细胞生长因子(VEGF)、骨髓粒巨噬细胞集落形成单位(GFU-GM)数和骨髓成纤维细胞集落成单位(CFU-F)的变化意义及川芎嗪对其的影响。方法:健康昆明小鼠经6.0Gy60Coγ照射后,立即喂饲川芎嗪并设对照组和正常组,分别于第3、7、14、21天检测其骨髓VEGF、CFU-GM和CFU-F的变化。结果:照射后第3、7、14 d骨髓VEGF表达水平显著降低,但川芎嗪组高于对照组;随着时间推移骨髓VEGF表达水平逐渐恢复,照射后第21 d川芎嗪组已恢复正常(P>0.05),而照射组仍低于正常组。照射后骨髓CFU-GM和CFU-F明显受到抑制,但川芎嗪组显示了良好的保护作用。结论:放射损伤后小鼠骨髓VEGF的表达变化在造血功能的恢复过程中起重要作用;川芎嗪具有改善骨髓造血功能的作用。     

骨髓间充质干细胞移植重建极重度放射损伤小鼠造血功能

目的:探讨小鼠骨髓间充质干细胞(mouse bone marrow mesenchymal stem cell,mMSC)单独输注对重度放射损伤小鼠造血功能重建的影响.方法:将体外培养扩增的雄性C57BL/6小鼠骨髓间充质干细胞输注给受致死剂量全身照射(8 Gy)的雌性C57BL/6小鼠,检测移植后外周血象、骨髓有核细胞数、病理变化、粒-单核细胞系祖细胞集落(CFU-GM)计数及性染色体比例,以未输注MSCs的小鼠作对照.结果:对照组小鼠(n=6)在照射后20 d内全部死于造血功能衰竭;MSCs组移植后血象明显下降,但2周后迅速恢复,28 d时恢复到照射前的60%左右,42 d外周血象基本恢复.MSC促进骨髓有核细胞数及CFU-GM快速恢复,有利于骨髓组织学的明显恢复改善.移植后42 d,仍可在受致死量照射的受体鼠内检测到供体MSC,但不能长期植入.结论:小鼠骨髓间充质干细胞单独输注可促进重度放射损伤小鼠的造血功能恢复,其植入时间长短可能与输注的细胞量有关.     

川芎嗪对辐射致血虚证小鼠骨髓细胞蛋白质表达的影响

目的:观察川芎嗪对辐射致血虚证小鼠骨髓细胞蛋白质表达的影响,探讨川芎嗪补血作用的分子机制。方法:采用3.5 Gy60Coγ射线全身1次性照射,制备小鼠血虚证模型;骨髓集落细胞培养,观察并计数粒系-巨噬细胞集落生成单位(CFU-GM)、爆增型红细胞集落生成单位(BFU-E)、红细胞集落生成单位(CFU-E)、混合集落生成单位(CFU-mix)集落数;利用蛋白质组学寻找差异表达蛋白质。结果:辐射后小鼠骨髓CFU-GM、BFU-E、CFU-E、CFU-mix集落数明显减少,川芎嗪能使其显著回升并部分逆转辐射后蛋白质表达的变化,使小鼠骨髓细胞5种蛋白质表达回升,5种回落。结论:川芎嗪可促进辐射致血虚证小鼠骨髓造血祖细胞增殖,调节多种骨髓细胞蛋白质的表达,后者可能是川芎嗪促进造血细胞生长和增殖的重要机制之一。     

人参多糖对X射线照射小鼠骨髓细胞染色体畸变和造血干、祖细胞的影响

本实验观察了人参多糖对X射线照射小鼠骨髓细胞染色体和造血干、祖细胞的影响。结果表明:人参多糖对受不同剂量X射线照射小鼠骨髓CFU—S和CFU—GM均有显著的保护作用,3.0Gy X射线照射后7天,人参多糖组小鼠骨髓CFU—S和CFU-GM仍高于对照组。同时发现,人参多糖对X射线诱发的染色体畸变率有明显的降低作用。     

何首乌提取物对放射线照射小鼠血小板生成的保护作用

目的：探讨何首乌提取物对放射线照射后小鼠血小板（Plt）生成功能的促进作用。方法：24只BALB/C小鼠随机分为正常组（A组。不接受照射和药物处理）,对照组（B组）和何首乌提取物组（C组）,每组8只。B、C组予3.5Gy Cs137射线全身照射;照射后C组每天腹腔注射何首乌提取物125mg.kg-1.d-1,连续21 d,B组注射等容积NS。于照射前及照射后第7、14、21 d采集尾部静脉血,观察全血细胞计数变化;第21 d采血后取骨髓行巨核细胞集落形成（CFU-MK）、骨髓基质细胞集落形成（CFU-F）、红系爆增性集落形成（BFU-E）及粒单系集落形成（CFU-GM）培养。观察6只正常小鼠体外骨髓CFU-MK、CFU-F在不同浓度（0、10、50、100、200、500μg/mL）何首乌提取物作用下的生长情况。结果：C组Plt计数回升明显高于B组（P〈0.01）,体内C组的CFU-MK、CFU-F、BFU-E、CFU-GM集落生长明显优于B组（P〈0.05,P〈0.01）。体外小鼠骨髓CFU-F的生长对何首乌提取物有浓度-依赖性。而何首乌提取物对体外骨髓CFU-MK生长无明显作用。结论：何首乌提取物对照射后小鼠骨髓的Plt生成功能有促进作用,它的作用机制可能通过刺激骨髓基质细胞增殖,改善巨核细胞造血微环境,进而提升外周血Plt数量。     

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.