白介素-10基因多态性与感染性疾病的关系的研究进展

白介素-10(interluekin-10 IL-10)是一种具有抗炎和免疫调节作用的细胞因子。是同型二聚体细胞因子, 属长链细胞因子家族。现已发现B细胞、单核／巨噬细胞、肥大细胞、角化细胞、肝细胞及多种肿瘤细胞均可分泌IL-10。 IL-10通过调节其他细胞因子的作用而起到抗炎和免疫调节作用。我们在这里主要谈一下,IL-10的生物学特点及在IL- 10基因的启动子区域几个位点的基因多态性与感染性疾病的关系的研究进展。     

肠缺血后处理对兔缺血再灌注损伤小肠上皮细胞线粒体形态和功能的影响

目的观察缺血后处理对小肠缺血再灌注损伤的保护作用。方法30只大白兔随机分为3组，每组8只：A组，假手术组；B组，肠缺血再灌注损伤模型组；C组，肠缺血再灌注损伤模型肠缺血后处理组，实验结束后取小肠标本进行小肠上皮细胞形态和呼吸功能指标测定。结果A、C两组线粒体的数目、周长均大于B组，A、C两组问比较，A组较大（P〈0．05）。A、C两组线粒体的面积、最大直径、最小直径、等效直径均小于B组（P〈0．05），A、C两组间比较差异无统计学意义（P〉0．05）。B组线粒体的体积密度小于A组，面积密度、比表面和粒子数密度均小于其余两组（P〈0．05）。A、C两组间三维平面形态计量学各参数比较差异无统计学意义（P〉0．05）；B、C组线粒体呼吸控制比率（RCR）低于A组差异有统计学意义（P〈0．05），与C组比较，B组下降更为明显（P〈0．05）。结论小肠缺血后处理对缺血再灌注损伤肠上皮细胞线粒体形态和功能均有保护作用。     

成人阴茎的三维数字化图像分析

目的对成人阴茎进行三维数字化图像分析,为阴茎整形修复获得手术前后形变参数及手术方案的选择,提供精确的形态学数据。方法采用Angel数字快速测量诊断系统,分别测量200例正常成人阴茎安静状态和勃起时的长度、周长、以及勃起时角度与阴茎长度、周径的关系。结果随着年龄和身高增长,阴茎也随之增长;身高与阴茎长度不成正比;阴茎勃起时随着角度的增加硬度增强,但勃起硬度变化时阴茎体积无明显变化。结论从不同径线不同角度对阴茎进行计算机三维测量分析,为阴茎整形修复术前设计、术后效果评价提供重要的量化指标。     

微波子宫内膜去除术与子宫切除术治疗异常子宫出血的疗效比较

目的 比较微波子宫内膜去除术(MEA)和子宫切除术(AH)治疗异常子宫出血的疗效.方法 将异常子宫出血80例分为MEA组和AH组各40例,比较两组临床疗效、手术时间、术中出血及手术前后白细胞变化. 结果 MEA和AH治疗异常子宫出血的有效率无显著差异(39/40 vs 40/40,χ2=0.000,P=1.000).MEA手术时间短[(4.8±1.2)min vs(102.5±34.6)min,t=17.848,P=0.000];术中出血少[0 ml vs(138.3±40.6)ml,t=21.544,P=0.000]. 结论 MEA是一种治疗异常子宫出血有效且微创的手术.     

Pathways from first health care seeking to diagnosis: obstacles to tuberculosis care in rural China.

OBJECTIVE: To examine health care seeking pathways for patients with tuberculosis (TB) and barriers related to these pathways in counties under the National TB Control Programme in rural China. METHODS: A cross-sectional study was conducted in two counties of east China in 2004-2005. A total of 557 TB patients were recruited and interviewed by physicians at the time of TB diagnosis. RESULTS: Of 557 participants, 13.3% had presented to a specialised county TB dispensary (CTD) directly after onset of symptoms, 31.4% had first sought care at a village health station and 51.2% had visited a township or county hospital first. The proportion of referral by a first health care provider to a CTD was highest in county level hospitals (73.5%) and lowest in village health stations (21.7%). The most prompt pathway from first health care seeking to TB diagnosis was to visit a CTD directly, with a median provider's delay of only one day. There was an increase in provider's delay when more health facilities were involved. CONCLUSION: To improve direct referral from general health care providers, especially village health care workers, to TB specialists would significantly shorten the delays in TB diagnosis in rural China.     

Neurochemical studies on the mesolimbic circuitry of antinociception

Previous studies using the technique of microinjection into brain nuclei indicated that the periaqueductal gray (PAG), nucleus accumbens, habenula and amygdala play an essential role in pain modulation and that these nuclei possibly act through a ‘mesolimbic neural loop‘ to exert an analgesic effect, in which Met-enkephalin (MEK) and β-endorphin (β-EP) have been implicated as the two major opioid peptides involved in antinociception. In the present study performed in rabbits, intracranial microinjection was supplemented with push-pull perfusion and radioimmunoassay to determine whether the release of enkephalins (ENK) and β-EP was increased in these nuclei when the putative neural circuit was activated by morphine administered into one of the nuclei. The results showed: (1) microinjection of morphine into the PAG increased the release of ENK and β-EP in the N. accumbens, and vice versa; (2) microinjection of morphine into the N. accumbens increased the release of ENK and β-EP in the amygdala, and vice versa; (3) morphine microinjected into the PAG caused an increase in the release of ENK and β-EP in the amygdala and vice versa, although the release of ENK in PAG was statistically not significant. These results indicate that PAG, N. accumbens and amygdala are connected in a network served by a positive feedback circuitry.     

Infantile spasms. A retrospective study of 105 cases.

This paper is a summary of our observations on 105 cases of infantile spasms. The age of onset was around six months after birth, but the patients came for treatment mainly about one year after onset. Fever of unknown cause, asphyxia, birth injury, infection of the central nervous system, tuberous sclerosis, phenylketonuria and recent immunization etc. were complained. Clinically, it is characterized by head nodding, mental retardation, myoclonic jerks and various neurologic deficits. EEG findings showed classical or modified arrythmia or other epileptiform patterns. About one third of 22 cases examined had abnormal brain stem auditory evoked potentials. Among 42 patients who underwent CT scanning before ACTH treatment, 18 were normal and 7 abnormal; during ACTH treatment 3 normal and 4 abnormal; after completion of treatment, 4 normal and 6 abnormal, suggesting no further atrophy of the brain. Examination of trace elements of the hair by particle-induced X-ray emission (PIXE) method in 23 patients revealed a significant difference in lead, calcium and zinc contents between patients and 101 controls, but no statistical difference in iron and copper contents between the two groups. Sodium valproate, prednisone and ACTH appear to be effective in the treatment of infantile spasms. Eight patients fully recovered, and they can go to school without difficulty. Many patients derived various degrees of improvement to the satisfaction of their parents. Two patients were still amented and often attacked by myoclonus. The effects, side effects of these drugs, and the possible pathogenesis were discussed.

     

急性膀胱炎超声表现特点

目的探讨急性膀胱炎(AC)的超声声像图特点。方法将32例AC自然充盈膀胱后的左右径、上下径、前后径,膀胱壁厚度、膀胱壁光滑度及膀胱内透声状态与63例正常组所测膀胱对应各值比较。结果炎症组与正常对照组膀胱左右径、上下径及前后径比较均无显著性差异,膀胱壁厚度炎症组(0.446±0.036)cm,对照组(0.224±0.036)cm,两者间有非常显著性差异P<0.01。尿频症状明显同时伴有血尿者,膀胱壁增厚的几率增加。结论膀胱壁增厚(以黏膜层为著),尿液透声差或透声欠佳是AC的主要超声征像。     

Early uptake of 99mTc-C2A in the acute phase of myocardial infarction as a prognostic indicator for follow-up cardiac dysfunction

OBJECTIVE: The C2A domain of Synaptotagmin I is a molecular probe for the specific imaging of cell death. Here we test the hypothesis that the uptake of 99mTc-C2A in the acute phase of an infarction is associated with cardiac dysfunction in follow-ups. METHODS: The left coronary artery was occluded in Sprague-Dawley rats for 0, 10, 20, and 30 min. 99mTc-C2A was injected intravenously at 2 h of reperfusion. Anterior planar images were acquired with one million counts on a gamma camera 3 h after injection. 99mTc-C2A uptake was calculated as the total counts in the left ventricle region minus blood pool signal. The in-vivo signal detected was correlated with wall motion score index at 1 and 3 weeks follow-ups measured by echocardiography. RESULTS: 99mTc-C2A uptake was higher with increased ischemic time (2244+/-852, 4054+/-1223, and 6178+/-1451 for 10, 20, and 30 min ischemia, analysis of variance P<0.001). A significant correlation was found between 99mTc-C2A uptake and wall motion score index at 1 week (R=0.800, P=0.0006) and 3 weeks (R=0.810, P=0.0008). CONCLUSION: In this ischemia/reperfusion model, 99mTc-C2A uptake in the acute phase was associated with functional abnormality at 1 and 3 weeks. This demonstrates the potential diagnostic and prognostic value of 99mTc-C2A as a novel imaging agent.