Successful treatment of pure red cell aplasia associated with systemic lupus erythematosus with oral danazol and steroid

We describe a middle-aged Chinese systemic lupus erythematosus (SLE) patient developing steroid refractory and transfusion dependent red cell aplasia. Oral danazol 200 mg twice per day was started together with low-dose prednisolone therapy. There was no further recurrence of anemia 1 month after this combined therapy.     

Differential protein expression in hypertrophic heart with and without hypertension in spontaneously hypertensive rats

Although cardiac hypertrophy in hypertension has been well recognized, the molecular mechanisms for the development of hypertrophy are still largely unknown. In this study, the protein expression profiles of left ventricular myocardia in spontaneously hypertensive rats （SHR） and Wistar-Kyoto （WKY） rats at different ages were analyzed using 2-DE in combination with MALDI-TOF/TOF MS/MS. The results showed that 20 proteins were modulated in the hypertrophic myocardium. Out of these modulated proteins, 13 proteins presented significant changes in SHR at an early stage prior to the development of sustained hypertension, while the changes of the other 7 protein expres- sions occurred only at a late stage in SHR when the blood pressure was significantly elevated, and were largely reversible by treatment with rennin-angiotensin-aldosterone system inhibitors losartan or enalapril. These data demonstrate that the changes in energy metabolism in the hypertrophied heart favor an increase in glycolysis and a decrease in oxidation of fatty acid and glucose, which occur at an early stage in SHR without hypertension. Our results also provide evidence to support the hypothesis that oxidative stress plays an important role in the development of hypertensive cardiac hypertrophy.     

Negative charge distribution and density on the surface of oxygenated normal and sickle red cells

Negative charges on the external surface of red cells were visualized by colloidal iron hydroxide labelling of 50% of the membrane area after osmotic hemolysis and glutaraldehyde fixation. Counts were made over randomly selected areas on electron micrographs at 350,000 x magnification. Statistical analyses showed that at the 95% level of confidence there was no significant difference between oxygenated normal (AA) and sickle (SS) cells in either the distribution or the density of negative charges.     

中药材龟板和鳖甲中DNA的提取与扩增

中药材龟板和鳖甲中ＤＮＡ的提取与扩增王亚明，周开亚，吴平，徐珞珊（南京师范大学生物系，南京２１００９７；中国药科大学生药学研究室，南京２１０００９）龟鳖类药材在我国使用历史悠久，具补阴益气的功效。《中国药典》（１９９０年版）规定龟甲（龟板）的原动物为...     

Patient expectations of radiology in noninteractive encounters

Open-ended interviews with 107 patients documented specific patient expectations of radiologic procedures during which there was no direct radiologist-patient interaction. Patient expectations could be classified into those related to the facility and those related to interactions with radiology staff. Among facility-related expectations, waiting time far outweighed all other concerns. Interpersonal skills were the predominant expectation of radiology staff. The role of the radiologist in fulfilling patient expectations was less clear. Only 10% of unprompted patients cited the radiologist as a factor in their expectations. When patients were specifically prompted to discuss the radiologist's role, communication skills, accuracy of interpretation, and interpersonal skills were the predominant concerns.     

应用28通道近红外光谱分析恢复过程中老年期抑郁症患者前额叶的激活特征

目的：认知功能障碍是老年期抑郁症的可逆性症状，试验以认知功能研究为突破口，采用28通道的近红外光谱技术分析处于恢复过程中的老年期抑郁症患者在执行词语流畅性测验时前额叶的激活特点，探讨老年期抑郁症的发病机制。 方法：①分组：患者组为2006～03／12首都医科大学附属北京安定医院收治的12例处于恢复过程中的老年期抑郁症患者，入组时符合DSM-4有关重度和中度抑郁发作或复发的标准诊断，首次发病年龄≥60岁，均服用SSRIs类抗抑郁药物治疗。对照组为12例性别、年龄和教育程度与患者组相匹配的健康志愿者。所有受试者排除脑器质性病变：②试验方法：所有受试者接受近红外光谱测查，在28通道的CW5（TechEnInc．American）NIRS系统上完成。通过近红外光谱系统监测被试者在执行词语流畅性测验任务过程中，前额叶氧合血红蛋白和脱氧血红蛋白浓度的变化，从而反映前额叶认知任务相关的激活效应。采用组块设计的词语流畅性测验作为认知激活任务，任务范式包括词语重复任务和词语流畅性任务两种试验。 结果：24例受试者均进入结果分析。①在健康老年人和处于恢复过程中的老年期抑郁症患者，词语流畅性测验能够激活双侧前额叶．未发现半球单侧化激活效应。②处于恢复过程中的老年期抑郁症患者在词语流畅性测验任务过程中，左侧前额叶激活效应较对照组减弱。③尽管在健康老年人和处于恢复过程中的老年期抑郁症患者，近红外光谱显示了不同的激活模式，但词语流畅性测验的成绩不存在显著性的组间差异（P〉0．05）。 结论：处于恢复过程中的老年期抑郁症患者存在词语流畅性测验相关的功能性左侧前额叶功能减退，微血管功能失调和多巴胺系统异常也许在老年期抑郁症的病理生理学机制中起重要作用。     

骨髓间充质干细胞移植后脑梗死大鼠脑电图的变化

目的:对比观察骨髓间充质干细胞移植前后脑梗死大鼠脑电图的变化。方法:实验于2002-09/12在解放军第三军医大学中心实验室及西南医院神经内科肌电图室完成。①实验分组:选取清洁级健康成年Wistar大鼠15只,随机数字表法分为干细胞移植组、模型对照组、假手术组,5只/组。②实验方法:另取2只健康幼年Wistar大鼠用于骨髓间充质干细胞的提取,联合采用密度梯度离心及贴壁法分离培养大鼠骨髓间充质干细胞,选取生长良好的1～3代细胞用于移植实验。干细胞移植组、模型对照组大鼠建立大脑中动脉栓塞模型。假手术组仅分离颈总动脉、颈外动脉和颈内动脉,不予结扎和放置线栓。造模后1周,干细胞移植组、假手术组大鼠行细胞移植,在立体定向仪定位下于脑梗死区(壳核)直接注射骨髓间充质干细胞悬液5μL,细胞浓度1×104μL-1,移植坐标为前囟前1.0mm,右旁开3.0mm,硬膜下5.0mm。模型对照组大鼠于相同部位注射等量不含细胞的磷酸盐缓冲液。③实验评估:采用脑电图机分别于造模前、造模后1周(移植前)、细胞移植后4周对各组大鼠进行脑电图检测。结果:15只大鼠均进入结果分析。①造模前基本节律为8～11Hz、15～30μV的α波,间或少量θ波,双侧对称。②造模后1周,假手术组异常率为0;模型对照组20%(1/5)轻度异常,80%(4/5)中度异常;干细胞移植组20%(1/5)轻度异常,60%(3/5)中度异常,20%(1/5)重度异常。③细胞移植后4周,假手术组脑电图恢复正常;模型对照组随术后时间的延长慢波有所减少,但仍可见到δ波、棘波、棘慢波的发放,至细胞移植后4周60%(3/5)轻度异常,40%(2/5)中度异常;干细胞移植组术后局限性慢波逐渐减少,基本节律全部恢复为α波,不对称的情况明显好转,至细胞移植后4周60%(3/5)轻度异常,以病灶侧局限性θ波较多为主,另外40%(2/5)基本正常。结论:动物实验显示骨髓间充质干细胞移植对脑梗死大鼠的脑电图背景节律有改善作用,一定程度上促进了神经系统功能的恢复。     

脊髓损伤后真皮多能干细胞移植时机的选择

目的:观察脊髓损伤后不同时间移植真皮多能干细胞对大鼠运动功能修复的影响。方法:实验于2006-06/2007-03在第三军医大学生理学教研室完成。①实验材料:实验动物2～4月龄SPF级SD大鼠,体质量(210±40)g,雌雄不限,由第三军医大学实验动物中心提供。真皮多能干细胞为第三军医大学防原医学系从SD大鼠真皮中提取和分离。②实验方法:将42只SD大鼠在L4水平制成脊髓全横断损伤模型。将动物随机分为对照组(n=6)、真皮多能干细胞移植组(n=36)。真皮多能干细胞移植组又分为6个时间点:损伤后1,4,7,10,14,21d移植组,每组6只。各移植组于伤处移植大鼠真皮多能干细胞,而对照组于损伤后7d注射等量磷酸盐缓冲液。③实验评估:分别于移植后1d、1周、4周、8周、12周对各组大鼠进行动物行为学和脊髓诱发电位检测。结果:42只实验大鼠均进入结果分析,无脱落。①动物行为学评分:4周以后各组动物行为学评分比较差异有显著性意义(P<0.05),移植组明显高于对照组(P<0.05),各移植组间比较,以损伤后7,10d移植组动物行为学评分改善最显著。②各组大鼠脊髓诱发电位检查:体感诱发电位和运动诱发电位潜伏期和波幅值于移植后8,12周后明显高于对照组(P<0.05),各移植组间比较,以损伤后7,10d移植组体感诱发电位和运动诱发电位潜伏期和波幅值改善最显著。结论:脊髓损伤后7～14d进行真皮多能干细胞移植可明显改善大鼠后肢的运动功能。