肢端型系统性硬皮病误诊1例

1　病例报告　女 ,45岁 ,因吞咽困难 16 mo伴发热 15 d,于1999- 0 7- 12入院 .于 16 mo前与人争吵后出现吞咽困难 ,以进食馒头、面条为著 ,剑突下有时出现梗噎感 ,随即呕吐 ,呕出所进食物及粘液 ,情绪波动可诱发症状加重 ,伴食欲减退、返酸 .15 d前无诱因出现不规则发热 ,T38～ 39℃ ,上腹痛加重 ,全身酸困不适 ,乏力、头晕、消瘦 .追问病史 ,患者 5 a前双手、足疼痛麻木 ,尤以受凉、精神刺激后明显 ,手指初发白 ,继而发紫 ,变红 ,且麻木疼痛加重 ,手足小关节渐僵硬、畸形 .曾到多家医院就诊 ,诊断 :“雷诺病、类风湿性关节炎”.2 a前出现…     

STUDY ON MODIFIED COLD STORAGE METHOD OF RAT LIVERS WITH SELF-MADE HYD SOLUTION

ＩＮＴＲＯＤＵＣＴＩＯＮ　　Ｔｈｅｍｅｔｈｏｄｏｆｃｏｌｄｌｉｖｅｒｐｒｅｓｅｒｖａｔｉｏｎｉｓａｃｒｕｃｉａｌｌｉｍｉｔ ｉｎｇｆａｃｔｏｒｉｎｔｈｅｄｕｒａｔｉｏｎｏｆｌｉｖｅｒｐｒｅｓｅｒｖａｔｉｏｎ .Ｅｘｐｅｒｉｍｅｎｔａｌｅｖｉｄｅｎｃｅｈａｓｓｈｏｗｎｔｈａｔｎｏｎｐａｒｅｎｃｈｙｍａｌｃｅｌｌｓａｒｅｍｏｒｅｖｕｌｎｅｒａｂｌｅｔｏｈｙｐｏｔｈｅｒｍｉｃｓｔｏｒａｇｅｔｈａｎｈｅｐａｔｏｃｙｔｅ,ｉｎｄｉｃａｔｉｎｇｔｈａｔｐｒｏｔｅｃｔｉｏｎｏｆｔｈｅｍｉｃｒｏｖａｓｃｕｌａｔｕｒ…     

三种药物对早孕妇女宫颈松弛活性观察报告

将 2 31例早孕妇女人工流产术前随机分为四组 :A组 (n =5 2 )口服米非司酮 2 5mg ,每日 2次 ,共 4次 ;B组 (n =6 0 )米索前列醇 6 0 0 μg ,顿服 ;C组 (n =6 3)宫术安栓 0 4g纳肛 ;D组 (n =5 6 ,对照组 ,不用任何药物 )。用Hegar宫颈扩张器测试无阻力通过宫颈内口的最大直径 (X±S　mm) ,A、B、C、D组分别为 7 2 2± 0 71,7 11± 0 72 ,5 6 2± 0 74,4 6 3± 0 84。经统计学分析A、B组与C、D组有显著性差异 (P <0 0 0 1)。结果显示米非司酮和米索前列醇对早孕宫颈有较为肯定的松弛作用。     

保存时间及温度对血清标本补体C_3和CH50测定结果的影响

目的 了解保存时间及温度对补体活性的影响。方法:用单向琼脂扩散法和非离心单管法对不同温度和时间下标本的C_3含量及CH50进行测定。结果与结论:血清补体C_5含量在室温下24h、4C下4dC、-10C和-20C下8d内无显著变化;CH50在室温下12h、4C下24h,-10C和-20C下8d内CH50无明显变化。     

补偿曲线曲度与弦斜度相关性分析

①目的　统一平衡牙合 ５ 个因素的衡量标准平面和单位,探讨弦斜度与补偿曲线曲度的相关关系。②方法　应用 Ｘ 线立体摄影测量结合计算机技术,对哈尔滨市９９ 例青年的补偿曲线进行测量分析,并以圆心角代表补偿曲线曲度。③结果　弦斜度与圆心角呈高度正相关（ｒ＝ ０．９４７１, Ｐ＜ ０．０１）。方差分析示弦斜度性别差异有极显著性（ Ｆ＝ ７．７９１４, Ｐ＜ ０．０１）。④结论　用弦斜度代替补偿曲线曲度是可行的。     

胸段硬膜外麻醉对神经肽Y的影响

为探讨胸段硬膜外麻醉对患者血浆ＮＰＹ的影响,本文采用放射免疫分析法测定了３１ 例择期上腹部手术病人胸段硬膜外麻醉前后血浆ＮＰＹ的含量。结果显示：麻醉后平均动脉压较麻醉前显著下降（ Ｐ＜０－０１） ,血浆ＮＰＹ则无显著变化（ Ｐ＞ ０－０５）。提示患者处于硬膜外麻醉状态下体内ＮＰＹ 含量的变化与交感神经系统调节具有一定的关系。     

7种化疗药物体外对白血病细胞杀伤作用观察

目的：为了探讨不同化疗药物作用于白血病细胞的特点,为临床化疗提供理论依据。方法：采用溴化四氮唑兰法（ＭＴＴ法）研究了１９例初治急性髓系白血病患有髓原代白血病细胞和Ｋ５６２细胞系体外对７种化疗药物及两药联合物敏感性。结果：柔红霉素（ＤＮＲ）、威猛（ＶＭ２６）,三尖杉酯碱（Ｈ）和米托恩醒（ＭＴＴ）体外杀伤白血病细胞作用较强,其中ＶＭ２６、Ｈ的作用曲线比较独特。两种药物联合使用效果多数按近或好于单用效果     

原发性脑室出血的CT征象与治疗（附28例报告）

目的探讨原发性脑室出血的临床表现、脑CT征象及其与治疗的关系;方法回顾性分析28例经CT证实原发性脑室出血病人的临床表现及CT征象;结果多有头痛、呕吐等脑膜刺激征表现,无脑局灶受损体征,脑CT均示原发脑室出血;结论原发性脑室出血的诊断依靠脑CT,Ⅰ型脑室出血宜行侧脑室外引流术,预后较差,Ⅱ、Ⅵ型可行腰穿脑脊液置换术．预后较好。     

Does glutathione-S-transferase dethiolate lens protein-thiol mixed disulfides?-A comparative study with thioltransferase.

Protein S-thiolation is a process in which under oxidative stress, vulnerable sulfhydryl groups of proteins are conjugated to non-protein thiols such as glutathione (GSH) or cysteine resulting in the formation of protein-thiol mixed disulfides, protein-S-S-glutathione (PSSG) and protein-S-S-cysteine (PSSC). This process spontaneously disrupts the redox homeostasis of the cells, which in turn leads to functional disturbances in the respective tissue. In the ocular lens, such modification of proteins may trigger a cascade of events starting with the alteration of protein conformation, protein/enzyme deactivation, protein-S-S-protein aggregation and eventually lens opacification or cataract. Generally, the first line of defense system in the cells protects the lens proteins against such damage. Recent studies in our laboratory have shown that in addition to this defense system, lens cells also possess a well developed system to repair the oxidative damage to the lens proteins. We have identified this repair system as thioltransferase (TTase) and have proved that TTase by its dethiolase activity reverses the protein S-thiolation process which returns the oxidatively damaged lens proteins/enzymes to their original reduced state and restores their physiological functions. We investigated if this repair mechanism was mediated by enzymes other than TTase. We studied glutathione S-transferase (GST) and report here for the first time the cloning, high level expression, and purification of human lens mu and pi isoforms of GST. A comparative study of recombinant human lens TTase and GST (mu and pi) on their dethiolating abilities using lens crystallin-thiol mixed disulfides showed that the lens TTase is 60-70% more efficient in the dethiolation/repair process than GST. When TTase and GST were tested in conjunction for the dethiolation of thiol mixed disulfides, there was no significant enhancement of dethiolase activity. These findings suggest that TTase by itself is an efficient enzyme in the dethiolation/repair process and hence can be considered a crucial system to counteract oxidative stress in the lens.     

Probing the binding of indolactam-V to protein kinase C through site-directed mutagenesis and computational docking simulations.

Protein kinase C (PKC) comprises a family of ubiquitous enzymes transducing signals by the lipophilic second messenger sn-1, 2-diacylglycerol (DAG). Teleocidin and its structurally simpler congener indolactam-V (ILV) bind to PKC with high affinity. In this paper, we report our computational docking studies on ILV binding to PKC using an automatic docking computer program, MCDOCK. In addition, we used site-directed mutagenesis to assess the quantitative contribution of crucial residues around the binding site of PKC to the binding affinity of ILV to PKC. On the basis of the docking studies, ILV binds to PKC in its cis-twist conformation and forms a number of optimal hydrogen bond interactions. In addition, the hydrophobic groups in ILV form "specific" hydrophobic interactions with side chains of a number of conserved hydrophobic residues in PKC. The predicted binding mode for ILV is entirely consistent with known structure-activity relationships and with our mutational analysis. Our mutational analysis establishes the quantitative contributions of a number of conserved residues to the binding of PKC to ILV. Taken together, our computational docking simulations and analysis by site-directed mutagenesis provide a clear understanding of the interaction between ILV and PKC and the structural basis for design of novel, high-affinity, and isozyme-selective PKC ligands.