胃食管反流病食管测压的研究

胃食管反流病(GERD)是指酸性胃液或胃液及胆汁由胃反流入食管引起的疾病,是消化科常见病、多发病.有些研究提示,25%以上成年人受此病影响[1],而且多数人有正常内镜下表现[2].正常情况下,由于食管借助于横膈、His角、贲门口粘膜皱襞及LES作用,特别是后者来防止胃食管反流(GER).当上述作用减弱时,就可能发生胃食管反流病.虽然LES尚未在解剖学上得到证实,但食管压力检测证实了LES存在,随着该技术的完善发展及腔内pH监测技术的应用,为胃食管反流病的发病机制及疾病的诊断治疗提供了可靠的依据.目前应用较广泛的测压系统是灌注式导管测压系统,它由液压灌注系统,压力导管,换能器及用于记录分析的计算机及相应软件所构成.另一种为内置微型传感器的测压导管及记录仪组成,可用于24 h动态监测.另外还有与以上两种测压系统配合应用的袖套导管及环行袖套式固态测压导管,适用于对食管括约肌进行压力测定.测压方法主要有静态测压,采用定点牵拉或快速牵拉法,另一种为动态测压,可对近于自然状态下的食管动力进行长时间连续监测.     

Post-cimetidine Surveillance for up to Ten Years: Incidence of Carcinoma of the Stomach and Oesophagus

The long-term effects of cimetidine on the occurrence of gastricand oesophageal cancer were assessed in a prospective cohortstudy of 9928 patients who had been prescribed cimetidine. Theywere first identified between 1978 and 1980, and cancer registrationsand deaths were identified among them over a period of up to10 years. One hundred and eleven cancers were identified afterthe start of cimetidine treatment: 71 were adenocarcinomas ofthe stomach, 27 were carcinomas of the cardia and/or oesophagus(22 adenocarcinomas, five unknown histology) and the remaining13 tumours were squamous cell cancers of the oesophagus. Onlysix patients presented with early gastric cancers. Over a periodof eight years the ratio of observed to expected (O/E) gastriccancer deaths has fallen from 10.7 (p<0.001) to 1.2 (NS).The O/E ratio of oesophageal cancer deaths also fell over thefirst six years of study, from 5.4 (p<0.01) to 1.4 (NS) butit has risen slightly in years 7 and 8 to 3.7 (p<0.05). Thesefindings do not suggest that there is an increased risk of developingoesophageal or gastric cancer from cimetidine treatment, andare generally consistent with cimetidine being used inadvertentlyto treat the early symptoms of gastric and oesophageal cancer.The slight rise in oesophageal cancer deaths in years 7 and8 was unexpected and will be the subject of further observation.     

瞬时性受体电位通道香草酸受体5、6与骨代谢的关系

目的:探讨瞬时性受体电位通道香草酸受体5、6与骨代谢的关系。资料来源:应用计算机检索PubMed数据库1999-01/2006-07相关瞬时性受体电位通道方面的文献,检索词“TRPV”,限定文献语言种类为English。资料选择:对资料进行初审,选取包括瞬时性受体电位通道香草酸受体5、6的文献,开始查找全文。纳入标准:对两者及瞬时性受体电位通道家族进行研究的文章。排除标准:研究内容局限于瞬时性受体电位通道香草酸受体1～4的文章。资料提炼:共检索到106篇关于瞬时性受体电位通道香草酸受体的文献,最终纳入30篇符合标准的文献。资料综合:瞬时性受体电位通道香草酸受体5、6是瞬时性受体电位通道超家族中的成员,是专门的上皮样钙离子通道。目前研究已经证明它们在肠道和肾脏等组织中有表达,并对跨细胞钙离子转运起着关键性调控作用。但在骨组织中表达情况相关报道较少,在骨代谢机制上的研究更少,本文针对目前两者与骨代谢的关系进行综述。结论:深入研究瞬时性受体电位通道香草酸受体5、6钙离子通道在骨代谢中的作用,对于那些与骨代谢相关疾病的治疗将能从分子水平上找到解决的方法。     

Lysis of human fibroblast colony-forming cells and endothelial cells by monoclonal antibody (6-19) and complement

The murine IgG2a monoclonal antibody 6-19 binds to a wide variety of nonhematopoietic cells including human marrow-derived stromal cells but does not bind to marrow or peripheral blood cells. We studied the effects of this antibody and rabbit complement on marrow cells. Fibroblast colonies were eliminated from light density marrow cells by a single incubation with monoclonal antibody 6-19 and complement. The growth and composition of granulocytic and erythroid colonies were unaffected. Specific complement mediated cytotoxicity of the antibody was confirmed on passaged human fibroblasts derived from marrow (more than 99.6% of fibroblasts are killed by a single treatment). Similar results were obtained with human umbilical cord endothelial cells. In addition, such treatment abolished the initiation of Dexter culture stroma. Incubation of bone marrow cell suspensions with this antibody and complement will allow the study of stroma-free marrow cells in long- term liquid cultures.     

染色体脆性位点表达与Ⅱ型糖尿病关系的探讨

染色体脆性位点表达与Ⅱ型糖尿病关系的探讨曾平郭英周迎生一、对象与方法１９９５年５～１２月，我们探讨了染色体脆性位点（ｆｒａ）的表达与Ⅱ型糖尿病（ＮＩＤＤＭ）的关系。实验组为１０例老年ＮＩＤＤＭ患者，年龄６０～６９岁，男４例，女６例，２例并发肾病，均有...