老年人心脑疾病与Hp抗体关系的研究

目的 探讨幽门螺杆菌（Hp）感染与老年人心脑疾病的关系。方法 采用酶联免疫法检测82例老年人心脑疾病患者和42例健康人血清Hp抗体IgG、IgA、IgM的含量，并进行对照分析。结果 心肌梗塞组与脑梗塞组的Hp抗体IgG、IgA、IgM阳性率均分别达到80％、60％、20％以上，两组结果比较差异无显著性（P〉0．05）。对照组Hp抗体IgG、IgA、IgM阳性率分别为44．6％、25．5％、12．8％，明显低于心肌梗塞组和脑梗塞组。结论 Hp感染可能与老年人心脑疾病的发病有关。     

血清脂联素、抵抗素与2型糖尿病

目的探讨人血清脂联素、抵抗素水平与2型糖尿病(T2DM)的关系。方法2型糖尿病患者47例和正常对照46例,两组年龄、性别匹配,采用酶联免疫分析法检测其空腹血清脂联素、抵抗素、胰岛素水平,同时测血糖、血压、血脂、身高、体重,计算腰/臀围、体重指数(BMI)、腰臀比值(WHR)和胰岛素敏感指数(ISI)、胰岛素抵抗性(HOMA-IR)、胰岛β细胞功能(HOMA-β)。结果2型糖尿病组的脂联素水平减低,脂联素水平在糖尿病超重组低于糖尿病正常体重组和对照组;相关分析显示脂联素水平与BMI呈负相关,与ISI正相关。而抵抗素水平在糖尿病超重组显著高于糖尿病正常体重和对照组(P<0.05)。相关分析显示抵抗素水平与BMI、腰围、空腹胰岛素、血压呈正相关,在对照组,与ISI、HOMA-IR、HOMA-β相关。结论脂联素、抵抗素可能参与胰岛素抵抗,与2型糖尿病的发生有关。[关键词]脂联素;抵抗素;2型糖尿病     

脑室注射N-苯甲基氧化碳酰-缬氨酸-丙氨酸-天冬氨酸-氯化丙酮对新生鼠缺氧缺血性脑损伤的保护作用

目的研究广谱Caspase抑制剂N-苯甲基氧化碳酰-缬氨酸-丙氨酸-天冬氨酸-氯化丙酮(zVAD-fmk)对新生大鼠缺氧缺血性脑损伤(HIBD)的保护作用。方法将新生7日龄SD大鼠36只随机分为缺氧缺血(HI)对照组(A)、zVAD-fmk治疗组(B)和假手术组(C)。B组动物于HI前即刻脑室注射zVAD-fmk 1μg,A组注射同体积PBS。建立HIBD动物模型,观察HIBD模型大鼠HI后24 h脑含水量及流式细胞术检测海马细胞凋亡百分率1、4 d体质量增长率和脑组织病理变化。结果HI后24 h,B组HIBD新生鼠结扎侧脑组织含水量、海马神经细胞凋亡率较A组明显减少;HI后14 d体质量增长率B组与A组无显著差异;缺血侧皮质、海马神经元死亡率B组较A组明显降低。结论脑室注射zVAD-fmk可减少HIBD后早期和中期神经细胞凋亡,对新生大鼠HIBD具有一定保护作用。     

依达拉奉影响缺血性神经元TNF-α和TGF-β1表达过程的实验研究

目的：观察依达拉奉（edaravone，E）对局部短暂性脑缺血再灌注模型ICR小鼠海马CAl区TNF-α和TGF-β1表达过程的影响并探讨其作用机制。方法：夹闭ICR小鼠左颈内动脉近端20min后恢复灌流，分别于第8，24，48h,4、7、14天取材并进行TNnd和TGF-β1免疫组化染色和常规HE染色，比较光镜下假手术组、缺血／再灌注组（模型组）、治疗组（缺血／再灌注＋依达拉奉组）海马CA1区TNF-α和TGF-β1表达细胞数和存活神经细胞数（平均灰度值表示）。结果：①治疗组和模型组海马CAl神经细胞存在早期TNF-α表达，治疗组中表达较模型组低（8、24、48h，P〈0．01）、4天后表达消失。②该区神经细胞的TGF-β1表达过程各不相同：模型组早期表达低于假手术组（8、24、48h，P〈0．01），晚期高于假手术组（4、7、14天，P〈0．01）；治疗组为持续高表达，早期显著高于模型组（8、24、48h，P〈0．01），也显著高于假手术组（8、24、48h，P〈0．01）：晚期高表达与模型组相似，显著高于假手术组（7、14天，P〈0．01）。③缺血后该区的神经细胞存活表现：模型组中存活细胞显著少于假手术组（7、14天，P〈0．01），而治疗组神经细胞丢失不明显，存活细胞数高于模型组（7、14天，P〈0．01）、与假手术组差别无显著性（7、14天，P〉0．05）。结论：早期依达拉奉治疗显著改变局灶性短暂脑缺血再灌注小鼠海马CA1区TNF-α和TGF-β1表达过程，降低TNF-α的早期活性表达，提高TGF-β1早期表达水平，且神经细胞无明显丢失，有脑保护意义。依达拉奉治疗作用可能和缺血／缺氧后神经细胞TNF-α和TGF-β1活性表达过程有关。     

The Protective Effect of Rosuvastatin on Ischemic-Brain Injury and Its Mechanism

The statins, which lower plasma cholesterol levels, are 3-hydroxy-3-methylglutaryl coenzyme A (HMGCoA) reductase inhibitors. To date, stains have developed to third generation, which include five commonly used stains: lovastatin, pravastatin, simvastatin, fluvastatin and atorvastatin. Recently, a new statin, named rosuvas-tatin, was used in the third stage of clinical trial. Rosu-vastatin, in contrast to most other statins, has the more powerful capability to lower plasma cholesterol levels,…     

EXPERIMENTAL STUDY ON PLASTICITY OF PROLIFERATED NEURAL STEM CELLS IN ADULT RATS AFTER CEREBRAL INFARCTION

RECENT studies demonstrated that neural stemcells have the potential of self-renewal and couldproliferate then differentiate into neurons and as-trocytes under some physiological and pathological condi-tions.They may be involved in neural function restoration.1It has clinical significance to study the changes of neuralstem cells after cerebral infarction,since cerebral infarctionis a common disease causing loss of neural function.2Poly-sialylated neural cell adhesion molecule PSA-NCAM)isa…     

Effect of intracranial transplantation of CD34+ cells derived from human umbilical cord blood in rats with cerebral ischemia

As a source of transplantable stem cells, the CD34^＋ subpopulation in human umbilical cord blood （HUCB） has been used extensively to treat some hematopoietic system diseases. However, whether CD34^＋ cells hold the therapeutic potential to cerebral ischemia is unknown. The purpose of this study was to observe the recovery of neural function after transplantation of CD34^＋ cells derived from HUCB into ischemic cerebral tissue in rats.     

Cardio-protective Effects of Corocalm (疏冠胶囊)on Acute Myocardial Ischemia/Reperfusion Injury in Rats

Objective: To investigate the cardio-protective effects of Corocalm (疏冠胶囊) on acute myocardial ischemia in rats, and to explore its possible therapeutic mechanisms. Methods: The acute ischemic model was prepared by ligating the left anterior descending (LAD) coronary artery in rats. The animals were divided into 6 groups, 8 in each group. The sham operated group underwent heart exposure without ligation and were treated with normal saline 3 ml/kg, while the other 5 groups, the model groups, consisted of acceptable acute ischemic model rats and were also treated with normal saline, with the Guanxin Capsule ted with 85 mg/kg and 340 mg/kg of Corocalm respectively, and the Diltiazem group, treated with Diltiazem 5 mg/kg, with all the tested drugs prepared with normal saline into equal volume ( 3 mi/kg) and administrated once via duodenum 10 min before ligation. Myocardial infarction area was determined by the quantitative histological assay with nitroblue tetrazolium (N-BT) stain. And the levels of creatine phosphokinase (CK),lactate dehydrogenase (LDH), malondialdehyde (MDA) content, and the activity of superoxide dismutase (SOD) in serum were measured by biochemical assay and spectrophotometry respectively. Besides, the blood viscosity in another 50 rats was determined, who received for 7 successive days oral administration with different concentration of Corocalm or aspirin. Results: It showed that low and high dose Corocalm could significantly reduce the infarction area, inhibit the increase of serum CK, LDH activity and MDA content, and enhance the SOD activity after ischemia/reperfusion. The whole blood viscosity at different shear rates in rats treated with high dose Corocalm was significantly lower than those treated with normal saline (P＜0.05). Conclusion: Corocalm has favourable protective effects on heart in ischemic condition, the effect of which might be through its actions in inhibiting CK and LDH activity, scavenging oxygen free radicals, and lowering blood viscosity.     

电阻抗断层成像脑出血模型的仿真研究

目的：建立脑出血有限元模型,对其进行电阻抗断层成像仿真研究.方法：基于4层同心圆头模型,利用有限元方法和动态NOSER算法重构成像.结果：单病灶脑出血模型的病灶能够被准确重构呈现,而多病灶模型中邻近病灶间的边界重构较为模糊.结论：动态NOSER算法是一种有效检测脑出血的电阻抗断层成像方法.     

椎基底动脉缺血性脑梗死所致精神障碍的经颅多普勒和磁共振血管成像的对照研究

目的：探讨椎基底动脉缺血性脑梗死所致精神障碍的经颅多普勒和磁共振血管成像的特点，为椎基底动脉缺血性脑梗死所致精神障碍的诊断提供量化指标。方法：对20例经磁共振血管成像确诊为椎基底动脉缺血性脑梗死同时伴有精神障碍的患者做经颅多普勒检测，测量椎基底动脉的脑血流量。同时对20例正常人做经颅多普勒和磁共振血管成像的检测，同患者组进行对照。结果：对照组双侧椎动脉脑血流量为110．4～275．8mL／min（均值193．5），较患者组47．5～260．2mL／min（均值147．8）高（P〈0.01）。患者组双侧椎动脉广泛迂曲。椎动脉重、中、轻度狭窄或发育不良患者的脑血流量均值分别为117．0、137．8、152．3（mL／min）。三者健侧脑血流量占双侧脑血流量的百分比分别是90．2％、81．5％、67．2％。结论：通过经颅多普勒和磁共振血管成像可以测量脑血流量及椎动脉的狭窄和迂曲程度，是有助于诊断的一种量化指标。对提高诊断和研究病理形态学改变提供线索。