Airway responses to antigen challenge in allergic rhinitis and allergic asthma

The density dependence of the maximum expiratory flow-volume curve, functional residual capacity (FRC), and specific airway conductance (SGaw) were determined before and during bronchial provocation with ragweed extract in 27 subjects with ragweed hypersensitivity and a history of either bronchial asthma (16 subjects) or allergic rhinitis (11 subjects). Mean baseline SGaw was significantly lower while mean volume of isoflow (Visov) and FrC were significantly higher in subjects with bronchial asthma. During antigen challenge, 10 of 16 subjects with bronchial asthma (63%) and five of 11 subjects with allergic rhinitis (45%) showed a greater than 35% decrease in SGaw ("reactors"): mean relative decreases in SGaw from baseline were 46% and 53%, respectively. The remaining subjects showed a less than 35% decrease in SGaw ("nonreactors") with mean relative decreases of 9% (allergic asthma) and 6% (allergic rhinitis). Mean Visov increased in all subjects with bronchial asthma and in eight of 11 subjects with allergic rhinitis. A significant increase in FRC (6%) was seen only in the "reactors" with bronchial asthma. Following antigen challenge, the beta adrenergic agonist, isoetharine, increased SGaw and decreased Visov. We conclude that in asymptomatic subjects with ragweed hypersensitivity, (1) central and peripheral airway function is more abnormal in subjects with bronchial asthma than in subjects with allergic rhinitis, (2) subjects of both groups show quantitatively and qualitatively comparable airway responses during antigen challenge with a decrease in SGaw or an increase in Visov, possibly representing increase in central and/or peripheral airflow resistance, respectively, (3) Visov may be a more sensitive indicator of airway response to antigen challenge than SGaw, and (4) the bronchodilator effects of a beta adrenergic agonist on antigen-induced bronchospasm are similar in both groups.     

人Flt3配体基因的克隆及其在CHO细胞中的表达

目的克隆人Flt3配体（Flt3 LIg and，FL），并在CHO细胞中进行表达。方法从健康人外周血中提取总RNA，通过RT-PCR技术，扩增Flt3配体胞外区cDNA功能性片段，经DNA测序证实后，将得到的片段基因插入pcDNA3．0表达载体，构建了pcDNA3．0-FL真核表达载体；将重组质粒pcDNA3．0-FL转染CHO细胞．经G418筛选出阳性细胞克隆，扩大培养，提取细胞总蛋白，用SDS—PAGE分离并Western blotting检测到在相对分子质量约24000处有一显色条带。结果FL胞外区cDNA被正确克隆到真核表达载体pcDNA3．0中并在CHO细胞中成功表达。结论成功构建了真核表达载体pcDNA3．0-FL并在CHO细胞中成功表达，为FL的相关研究和应用开发奠定了基础。     

Body composition,work capacity,and work efficiency of active and inactive young men

On 46 healthy young men, of whom 18 took part in strenuous sport at least once a week, height, weight, total body fat (as % of body mass) and lean body mass (LBM) were determined. The subjects performed submaximal exercise on a bicycle ergometer and climbing on an upwardly inclined treadmill at work loads of 60, 110, and 140 watts. Oxygen consumption ( ), respiratory quotient (RQ), energy expenditure (), and heart rate (f _H) were measured at rest and at each work load, and maximum oxygen intake ( max) and physical work capacity (PWC₁₅₀, PWC₁₇₀) were calculated.Anthropometric parameters did not differ significantly between sportsmen and sedentary subjects. max, PWC₁₅₀, and PWC₁₇₀ had higher correlations with LBM than with the other anthropometric parameters. max expressed in terms of LBM (ml/kg LBM/min) was the parameter which showed the clearest distinction between sportsmen and sedentary individuals. The sportsmen had higher max on the treadmill test than on the bicycle ergometer. PWC₁₅₀ and PWC₁₇₀ were higher on the bicycle than on the treadmill and had high correlations with max. Work efficiency was of the same order in both groups and showed negative correlation with the degree of obesity on the bicycle ergometer and positive correlation on the treadmill.     

电化学治疗昆明小鼠肉瘤及其机理分析

研究了电化学治疗昆明小鼠肉瘤的疗效,并分析其机理。在体外将S-180细胞用不同参数的电场处理,研究适合电化学治疗的电场条件。通过复制肉瘤模型,将肉瘤小鼠随机分成4组:对照组、电疗组、化疗组、电化疗组。研究了不同处理组的肿瘤抑瘤率、治愈率以及小鼠的自由基代谢水平。结果电化疗组的抑瘤率、治愈率都显著高于化疗组和电疗组(P<0.05),电化疗组小鼠受到氧自由基的攻击显著降低,免疫力提高。分析机理发现,电化学治疗肿瘤的机理可能至少涉及细胞膜通透性提高、细胞的耐药性降低、机体的免疫力提高三个方面。     

音乐疗法治疗慢性精神分裂症疗效分析

目的 观察音乐疗法对慢性精神分裂症的治疗效果。方法 住院慢性精神分裂症患者64例，随机分为实验组和对照组，各32例，观察8周，以BPRS、SANS量表评定疗效。结果 两组患者BPRS、SANS评分差异均有显著性意义。结论 音乐疗法对慢性精神分裂症病人的康复治疗有一定疗效。     

磁性阿霉素纳米微球的制备及在高频磁场中的发热研究

制备一种在高频磁场中能感应发热的用于治疗肿瘤的阿霉素纳米微球，研究其在磁场中的热效应。用超声搅拌冷冻干燥的方法制备药物微球，平均粒径200nm左右。电镜观察其形态为球囊状。将其置于不同介质中于高频磁场中测其温度变化值，实验表明该微球在交变磁场中使介质升温。升温速度与平稳时的温度和微球的量及磁场强度成正比，介质流动性好，升温快。     

Group treatment for pain and discomfort

Rheumatic patients very often suffer from chronic pain and impairment and show psychological reactions as a consequence of their physical condition. These reactions may vary from psychophysiological symptoms to anger, anxiety, or depression. We developed a cognitive-behavioral treatment programme in a group setting format with components of relaxation, cognitive restructuring, and the promotion of well-being. Subjects included in the study were given diagnoses of low back pain, tension headache, rheumatoid arthritis, and ankylosing spondylitis. Treatment effects in different diagnostic groups were compared to each other, supporting the assumption that pain reduction is greatest in low back pain and least in ankylosing spondylitis. Subjects with inflammatory rheumatic diseases showed some improvement in self-reported physical complaints and in their feelings of well-being.     

Effect of megestrol caproate on the reproductive function of laboratory animals

In vivo experiments on rats and rabbits showed that megestrol caproate, a 17-alpha-hydroxyprogesterone derivative exhibits 10-fold higher gestagenic activity compared to progesterone and possesses no androgenic, anabolic, and estrogenic activities.     

优化牙支持式上颌骨前部牵引成骨术与上颌骨Le FortⅠ型前徙术治疗唇腭裂患者的效果及对其腭咽部结构的影响分析

目的探讨优化牙支持式上颌骨前部牵引成骨术与上颌骨Le FortⅠ型前徙术治疗唇腭裂患者的效果,以及对其腭咽部结构的影响。方法将大连市口腔医院2017年1月一2020年1月收治的63例唇腭裂伴上颌骨发育不足患者纳人研究,依据随机数字表法分为观察组31例和对照组32例。对照组实施上颌骨Le FortⅠ型前徙术治疗,观察组实施优化牙支持式上颌骨前部牵引成骨术治疗。比较并分析两组治疗前后腭咽部形态参数、上颌骨前移距离、吹气试验和语言清晰度测听结果。采用Pearson相关性分析明确上颌骨前移距离与腭咽部形态各项参数之间的关系。结果治疗后观察组静止位的腭咽腔深度低干对照组,差异有统计学意义(P<0.05);两组治疗前后腭咽部形态其余各项参数及上颌骨前移距离,差异均无统计学意义(P>0.05)。治疗后观察组不捏鼻、捏鼻吹气试验时间均短干对照组,语言清晰度高干对照组,差异均有统计学意义(P〈O.O5)。Pearson相关性分析显示,上颌骨前移距离与各项腭咽部形态参数均无相关性(P>0.05)。结论优化牙支持式上颌骨前部牵引成骨术与上颌骨Le FortⅠ型前徙术治疗唇腭裂均有效,但是,优化牙支持式上颌骨前部牵引成骨术相较于上颌骨Le FortⅠ型前徙术,对患者腭咽部结构影响较小,值得推荐采用。     

医学装备物资溯源管理系统持续评估与改进的效果分析

目的:研究医学装备物资溯源管理系统持续评估与改进的效果。方法:选取医院151名设备使用管理相关人员,按照医学装备管理方法的不同将其分为观察组(74名)和对照组(77名),观察组采用医学装备物资溯源管理系统的管理模式,对照组采用传统设备管理模式。采用自制满意度调查问卷的方法,调查两组对医学装备管理的满意度,对比分析两组对医学装备管理的中长期效果评价、运营绩效和管理满意度。结果:观察组医学装备管理的中期优良率为91.89%,长期优良率为94.59%,明显高于对照组的79.22%和81.82%,差异有统计学意义(x~2=6.495,x~2=7.837;P<0.05);观察组医学装备管理的满意度为95.95%,明显高于对照组的83.12%,差异有统计学意义(x~2=8.784,P<0.05);观察组平均操作时间、无关操作时间和差错流程数均低于对照组,差异有统计学意义(t=16.620,t=31.638,t=15.745;P<0.05)。结论:医学装备物资溯源管理系统对医学装备管理的中长期效果显著,能够缩短管理操作时间、减少差错流程、提高管理水平和保护患者权益,可实现医学装备全生命周期的信息化管理。