Modulation of trenimon-induced cytotoxicity by DT-diaphorase in isolated rat hepatocytes under aerobic versus hypoxic conditions.

Trenimon belongs to a class of aziridinylbenzoquinone anticancer drugs that cross the blood-brain barrier. In this study we have investigated the molecular mechanisms for trenimon-induced toxicity in aerobic versus hypoxic conditions with the use of freshly isolated rat hepatocytes. The following evidence suggests the mechanisms for trenimon detoxification involves reduction by DT-diaphorase, while the cytotoxic mechanism involves macromolecular alkylation under hypoxic conditions as well as oxidative stress under aerobic conditions. (a) Hepatocyte cytotoxicity induced by trenimon (250 microM) under aerobic conditions ensued following an initial induction of cyanide-resistant respiration and partial oxidation of glutathione to oxidized glutathione. Trenimon reduction to the hydroquinone by the hepatocytes was rapid. Inhibition of hepatocyte DT-diaphorase by dicumarol increased trenimon-induced cytotoxicity by approximately 10-fold, and markedly inhibited hydroquinone formation. Furthermore, both cyanide-resistant respiration and oxidized glutathione formation were markedly increased, resulting in depletion of oxygen in the media. Trenimon reduction to the hydroquinone then occurred. This suggests that DT-diaphorase in normal hepatocytes prevents the formation of the semiquinone that causes cytotoxic protein alkylation and oxidative stress. (b) Hepatocyte cytotoxicity induced by trenimon (350 microM) under hypoxic conditions ensued following glutathione depletion without oxidized glutathione formation. Inactivation of hepatocyte DT-diaphorase by dicumarol under hypoxic conditions increased trenimon-induced cytotoxicity by approximately 3.5-fold and increased semiquinone radical levels 2-fold without affecting its reduction rate. This suggests that the cytotoxic mechanism involves protein alkylation by semiquinone radicals formed by reductases catalyzing a one-electron reduction of trenimon.     

日光对皮肤弹性的影响

目的观察日光和年龄对皮肤弹性的影响。方法问卷调查受试者（郊县组94例，市区组105例）的日光曝晒情况，并应用皮肤弹性测量仪测量外眦部、鼻唇沟及眶下皮肤弹性参数，包括：弹性，黏弹性，可扩展性和张力参数。比较不同年龄组间、市区与郊县组间各弹性参数间的差异。结果市区和郊县各弹性参数均与年龄有较好的相关性，随年龄增长，皮肤各弹性参数均下降。郊县组与市区组比较，弹性和黏弹性参数差异较小，而可扩展性和张力参数差异较大。结论弹性和黏弹性参数可能与内在老化有关，而可扩展性和张力参数可能与光老化有关。     

氩激光凝固法对糖尿病性视网膜病变的疗效观察

目的 观察糖尿病性视网膜病变(DR)不同分期者接受氩激光治疗的临床效果。方法 采用科以人2000型氩激光组合激光机对170例263只患眼分别做如下处理：(1)对非增殖期糖尿病视网膜病变(NPDR)30眼行局部氩激光凝固术(光凝)；(2)对增殖前期糖尿病视网膜病变(PPDR)156眼行次全视网膜光凝；(3)对增殖期糖尿病视网膜病变(PDR)77眼行全视网膜光凝，对合并黄斑局限或弥漫性水肿者给予局灶性光凝或格栅样光凝。于光凝后3个月检查。进行视力、眼底、视网膜荧光血管造影，并与治疗前各项结果对比。结果 视力提高92眼(35％)、无变化144眼(55％)、下降27眼(10％)。眼底检查、荧光血管造影复查示：NPDR、PPDR眼视网膜微血管瘤、水肿、渗出消退，荧光渗漏消退占89％。其余11％需补充光凝。PDR眼视网膜、视盘新生血管消退占67％，33％为部分消退需补充光凝。黄斑水肿完全或部分消退占91％，光凝后出现视网膜前灶性出血占8％，玻璃体积血为1％。结论 氩激光对不同分期DR均有效。NPDR、PPDR效果好于PDR眼，后者光凝后荧光血管造影复查以及补充光凝对提高疗效非常必要。     

肿瘤坏死因子受体相关因子6与破骨细胞

肿瘤坏死因子受体相关因子是细胞胞浆内的一类重要的接头分子。其中肿瘤坏死因子受体相关因子6，通过与破骨细胞表面的核因子κB受体激动剂结合，并将信号下传，激活c-Src、Jun氨基末端激酶、核因子κB，在破骨细胞的分化与成熟过程中起着重要的作用。     

Induced abortion in China and the advances of post abortion family planning service

<正>This is a review of current situation of induced abortion and post abortion family planning service in China. Induced abortion is an important issue in reproductive health. This article reviewed the distribution of induced abortion in various time, areas, and population in China, and explored the character, reason, and harm to reproductive health of induced abortion. Furthermore, this article introduces the concept of Quality of Care Program in Family Planning, and discusses how important and necessary it is to introduce Quality of Care Program in Family Planning to China.     

我国南丁格尔奖获得者社会成因分析

[目的]探讨家庭、学校与工作环境对我国南丁格尔奖获得者的成因影响，挖掘其中重要影响因素，为培养优秀护理人才提供参考。[方法]采用文献分析法进行研究。[结果]我国南丁格尔奖获得者家庭环境大多贫困，家庭类型以教师、医生等知识分子家庭居多；就读学校大多为治学严谨、校规严明的教会创办学校；工作单位最多6个，最少1个，平均1．98个；获得者83．72％来自综合类医院（其中32．56％获奖时已退休），16．28％来自专科类医院。88．37％参加过重大突发事件的护理工作；获奖前工作年限最长61年，最短10年，平均39．49年。[结论]家庭潜移默化；学校治学严谨、校规严明；工作单位多为综合类医院；绝大多数历经特殊事件磨炼。     

Various manifestations of hyperthyroidism in an ambulatory clinic: case studies

This study reviews five cases of women with hyperthyroidism, three black women and two Hispanic women. Initially, two patients presented with voice changes, weight loss, and increased appetite. Only two patients presented with classical symptoms of hyperthyroidism. Examination showed all patients had diffusely enlarged thyroids and exaggerated reflexes. Two patients showed Graves'' opthalmopathy.     

河豚鱼中毒15例的救治体会

目的探讨河豚鱼中毒的治疗方法及影响预后的因素。方法回顾性分析我院1996年1月-2006年4月收治的15例河豚鱼中毒的病例资料。结果15例均有恶心、呕吐，腹痛，口唇、舌尖、指端麻木，四肢乏力，外周血白细胞计数增高，肝功能损害5例，心电图可见房室传导阻滞6例。1例于中毒后16h死于呼吸循环衰竭。结论目前河豚鱼中毒尚无特效解毒剂，死亡率50％，死亡主要原因为脑干麻痹，导致呼吸循环衰竭。主张尽早清除毒物，应用维生素B1，B6，B12等以及士的宁注射治疗神经肌肉麻痹，有呼吸衰竭者尽快行气管插管机械通气辅助呼吸。