糖耐量及胰岛素水平测定在多囊卵巢综合征中的临床应用

目的探讨多囊卵巢综合征患者（PCOS）糖代谢和胰岛素水平的改变。方法 173例PCOS患者按体质量指数（BMI）分为PCOS非肥胖组（BMI〈25kg/m2）、PCOS肥胖组（BMI≥25kg/m2）和42例正常对照组,各组均做口服糖耐量和胰岛素释放试验。结果与对照组相比,PCOS非肥胖组的空腹和口服葡萄糖后,1、2和3h的血糖差异均无统计学意义（P〉0.05）,胰岛素水平均有显著升高（P〈0.05）。PCOS肥胖组的空腹及口服葡萄糖后,1、2和3h的血糖和胰岛素水平均显著高于对照组和PCOS非肥胖组（P〈0.05）,差异具有统计学意义。结论 PCOS患者存在糖代谢异常和高胰岛素血症,口服糖耐量试验是用于监测育龄妇女PCOS患者糖代谢的较好指标。     

MM-093, a recombinant human alpha-fetoprotein for the potential treatment of rheumatoid arthritis and other autoimmune diseases

Merrimack Pharmaceuticals Inc (previously Atlantic Biopharmaceuticals) is developing MM-093 (formerly ABI-001), an injectable formulation of a recombinant human alpha-fetoprotein, for the potential treatment of myasthenia gravis, multiple sclerosis, rheumatoid arthritis, autoimmune uveitis and psoriasis. MM-093 is currently undergoing phase II clinical trials for rheumatoid arthritis, psoriasis and autoimmune uveitis.     

低频重复经颅磁刺激在帕金森病中的康复治疗作用

目的　探讨低频重复经颅磁刺激 (rTMS)对帕金森患者的治疗效果。方法　对 3 5例帕金森病 (PD)患者予以低频rTMS治疗 ,以 60 %最大刺激强度刺激双侧额叶 ,每侧刺激 3 0次 ,频率 0 .5Hz,每日 1序列 ,连续治疗共 7次为 1个疗程。于治疗前、后观察WPDEF评分、汉密尔顿抑郁分级量表 (HAMD)及中枢静止期 (CSP)等指标变化 ,评估rTMS在PD康复及治疗中的作用。结果　低频rTMS治疗后WPDEF评分减少 (P <0 .0 1)。TMS CSP延长 ,HAMD降低 (P <0 .0 5) ,其差异具有显著性。治疗的近期总有效率为 86% ,远期效果有待进一步观察。结论　低频rTMS治疗在减轻PD主要临床症状的同时也能改善其伴随的抑郁状态 ,适用于PD的康复辅助治疗 ;其作用机理为低频rTMS可能增强皮质内抑制而延长CSP ,促进多巴胺的释放 ,以及改善PD伴随的抑郁心境     

应用螺旋CT技术重建桩核体三维数字模型的可行性研究

目的构建桩核体的三维数字模型(库),为个体化桩核的设计、制作提供基础条件。方法在标准模型上制备桩核体的模板,采用螺旋CT扫描对其进行测量,应用Mimics软件和Geomagic 9.0软件实现桩核体的三维实体化重建,对桩核体模板表面标志点间距离进行相应的软件测量,并进行统计学分析。结果用螺旋CT扫描数据对桩核体的模板实现了三维实体化重建,获得桩核体的三维数字模型(库)。螺旋CT扫描数据所建立的桩核体三维数字模型,边缘轮廓连续、平滑,肩台清晰可辨。软件测量组和实体测量组桩核体模板表面标志点间距离的差异无统计学意义(t=0.158,P=0.876)。结论应用螺旋CT扫描数据,能够准确、快速建立桩核体的三维数字模型(库),软件测量与实体模型的测量值高度相关,系统与常用的测量手段间具有较好的一致性,该数字模型(库)能直接用来进行桩核的计算机辅助设计。     

Monoclonal antibody 7G3 recognizes the N-terminal domain of the human interleukin-3 (IL-3) receptor alpha-chain and functions as a specific IL-3 receptor antagonist

The human interleukin-3 receptor (IL-3R) is expressed on myeloid, lymphoid, and vascular endothelial cells, where it transduces IL-3- dependent signals leading to cell activation. Although IL-3R activation may play a role in hematopoiesis and immunity, its aberrant expression or excessive stimulation may contribute to pathologic conditions such as leukemia, lymphoma, and allergic reactions. We describe here the generation and characterization of a monoclonal antibody (MoAb), 7G3, which specifically binds to the IL-3R alpha-chain and completely abolishes its function. MoAb 7G3 immunoprecipitated and recognized in Western blots the IL-3R alpha-chain expressed by transfected cells and bound to primary cells expressing IL-3R alpha. MoAb 7G3 bound the IL-3R alpha-chain with a kd of 900 pmol/L and inhibited 125I-IL-3 binding to high- and low-affinity receptors in a dose-dependent manner. Conversely, IL-3 but not granulocyte-macrophage colony-stimulating factor (GM-CSF) inhibited 125I-7G3 binding to high- and low-affinity IL- 3Rs, indicating that MoAb 7G3 and IL-3 bind to common or adjacent sites. In keeping with the inhibition of IL-3 binding, MoAb 7G3 antagonized IL-3 biologic activities, namely stimulation of TF-1 cell proliferation, basophil histamine release, and IL-6 and IL-8 secretion from human endothelial cells. Two other anti-IL-3R alpha-chain MoAbs failed to inhibit IL-3 binding or function. Epitope mapping experiments using truncated IL-3R alpha-chain mutants and IL-3R alpha/GM-CSFR alpha chimeras revealed that 31 amino acids in the N-terminus of IL-3R alpha were required for MoAb 7G3 binding. MoAb 7G3 may be of clinical significance for antagonizing IL-3 in pathologic conditions such as some myeloid leukemias, follicular B-cell lymphoma, and allergy. Furthermore, these results implicate the N-terminal domain of IL-3R alpha in IL-3 binding. Since this domain is unique to the IL-3/GM- CSF/IL-5 receptor subfamily, it may represent a novel and common binding feature in these receptors.     

彩色多普勒超声诊断肾恶性循环肿瘤的价值(附20例分析)

目的:评价彩色多普勒超声诊断肾常见恶性肿瘤的价值。方法:分析20例手术病理证实为肾恶性肿瘤的超声表现。结果:肾恶性肿瘤的灰阶超声各异,彩色多普勒超声表现为抱球型和丰富血流型的肾脏肿瘤,术前均定性诊断正确(9/9)。对于星点型、少血流型的肾脏肿瘤,诊断符合率分别为75%(3/4),85.7%(6/7)。超声定性诊断与术后病理符合率为90%。结论:肾恶性肿瘤的回声多种多样,无特异性,彩色血流丰富和抱球型的肿瘤,多考虑恶性。超声诊断对血供丰富的肾肿瘤意义更大,可作为肾恶性肿瘤患者术前首选的检查方法。