LHRH-A对孕中期大鼠抗妊娠作用的研究

本文观察了[D-Ala⁶,Pro⁹-Ethylamide¹⁰]-LHRH(LHRH-A)对孕中期大鼠的抗妊娠作用。结果显示:在孕9～11d sc 200μg/d LHRH-A,血浆孕酮水平自第二次给药后明显下降(P<0.05),给药大鼠均流产终止妊娠;LHRH-A的抗妊娠作用可被醋酸甲地孕酮所拮抗;LHRH-A对体外培养的假孕大鼠和孕d 9大鼠黄体细胞分泌孕酮有明显的直接抑制作用。     

Distal colon motility and clinical parameters in depression

Eighty-six patients suffering from nonpsychotic unipolar major depressive disorder, according to Research Diagnostic Criteria, were rated on a modified Hamilton Rating Scale for Depression (HRS). All completed the self-rating Beck Depression Inventory (BDI). Distal colon motility (dcm) studies, performed in all the patients, differentiated two types: low intestinal tone (low-IT) = 40 subjects, and high intestinal tone (high-IT) = 46 subjects. Low-IT depressed patients showed a statistically significant preponderance in the HRS items 'retardation', 'somatization', 'fatigability', 'hypochondriasis' and 'obsessional symptoms'. The high-IT depressed patients, on the other hand, showed preponderance in the items 'guilt', 'suicide', 'insomnia', 'agitation', 'anxiety psychic', 'loss of insight', 'depersonalization' and 'paranoid symptoms'. A positive correlation (r) was found between HRS- and BDI-mean total scores. In addition, a positive correlation (r) was found between HRS scores and distal colon tone in high-IT patients, although the same was not true for low-IT patients. Our results suggest the existence of two subtypes of depressive syndromes, distinguishable on the basis of distal colon motility profiles.     

Diazepam metabolism in human foetal and adult liver

Summary Diazepam was metabolized by human foetal liver microsomes to N-desmethyldiazepam and N-methyloxazepam as early as the 13th week of gestation. The metabolic activity was lower than that of microsomes from adult human liver. Diazepam was shown mainly to be hydroxylated to N-methyloxazepam at substrate concentrations higher than 0.1 mM. Diazepam levels above 1.0 mM were inhibitory to the overall metabolic reaction. SKF 525-A inhibited diazepam metabolism by foetal liver microsomes at a concentration of 0.1 mM. The addition of diazepam to foetal and adult human liver microsomes resulted in a type II spectral change. Its inhibition by carbon monoxide indicated that biotransformation of diazepam was performed by the cytochrome P-450-linked mono-oxygenase system.     

广州市某三甲医院护士睡眠质量状况

目的:研究广州市某三甲医院护士睡眠质量的状况,分析影响其睡眠质量的因素,提出相应的对策,从而提高护士的睡眠质量,促进护士的身心健康。方法:采用匹兹堡睡眠质量指数量表(PSQI)及自制一般情况调查表,以广州市某三甲医院护士为研究对象,采用整群抽样方法对该院206名在职护士进行问卷调查资料收集,并进行统计学分析。结果:1该院PSQI7分者共69人(33.5%),PSQI平均得分(6.72±3.27),与常模比较差异显著(t=20.84,P0.05);2不同科室的护士在入睡时间、睡眠障碍、日间功能障碍及PSQI总分差异显著(F=3.903,5.543,2.448,3.079;P0.05),其他4个因子的比较上,差异均无统计学意义(P0.05)。结论:该院临床护士整体睡眠质量差,应采取有效措施进行干预,以提高他们的身心健康水平。     

Right bundle branch block in complete transposition

Two of 26 infants with complete transposition presented with complete right bundle branch block in the first year of life, and 10 showed incomplete right bundle branch block. In no instance was the right ventricular conduction anomaly related to surgery or cardiac catheterization and it was not present at birth. The two cases with complete right bundle branch block had prolonged and severe hypoxemia and markedly dilated right ventricles. One had depressed right ventricular function and died after a Mustard procedure from low output syndrome. Whereas incomplete right bundle branch block may reflect right ventricular hypertrophy, it is suggested that complete right bundle branch block in complete transposition may signify right ventricular dysfunction and possibly irreversible changes of the right ventricular myocardium. It may be a sequel of long-term hypoxemia and pressure overload. Once observed, it is perhaps an indication for an alternative surgical approach other than an intra-atrial repair procedure.     

局部注射丹参酮Ⅱ-A对正畸过程中牙周膜VEGF表达的影响

目的:研究局部注射丹参酮Ⅱ-A对正畸牙移动过程中牙周膜压力侧VEGF表达的影响.方法:选取20只兔,随机均分为第1、3、7,14和21天组,复制兔双侧下颌第一磨牙的正畸牙移动模型,以左侧下颌第一磨牙作为实验组,每日1次于近中牙龈黏膜下注射丹参酮Ⅱ-A磺酸钠注射液0.36 mg/d,右侧注射等量生理盐水作为对照组,分别于持续注射后1、3、7、14、21d时麻醉处死动物,切取双侧下颌第一磨牙及周围组织制成牙周组织切片,观察VEGF的相对表达量,测量下颌第一磨牙移动距离.结果:除第1天组外,其余各个时间点实验组牙移动距离大于对照组,差异有统计学意义(P＜0.05);第3、7、14、21天各组VEGF平均染色强度高于第1天,且实验组高于对照组,差异有统计学意义(P＜0.05),第7天实验组VEGF平均染色强度最高,差异有统计学意义(P＜0.01).结论:丹参酮Ⅱ-A促进牙移动过程中血管内皮细胞VEGF表达,增加新生血管的数量,对加速正畸牙移动有一定的作用.     

应用NCCLS EP5-A方案评价唾液酸试剂盒的精密度

目的 评价测定唾液酸(SA)试剂盒的精密度.方法 利用NCCLS EP5-A方案评价唾液酸的精密度.结果 正常和异常血清的批内变异系数分别为0.9%和1.9%.批间变异系数分别为1.2%和1·7%,总变异系数为1.6%和2.6%.结论 SA试剂盒精密度良好,准确可靠且操作简便.     

NADPH氧化酶p22phox亚基基因多态性在动脉粥样硬化性脑梗死发病中的意义

目的探讨还原型烟酰胺腺嘌呤二核苷酸磷酸（NADPH）氧化酶p22phox亚基-A930G、C549T基因多态性与动脉粥样硬化性脑梗死（cI）的关系。方法采用PCR-RFLP技术检测269例CI患者（cI组）和187例无CI对照者（对照组）的基因多态性。结果与对照组比较,cI组的一A930G基因型分布差异有统计学意义,而．A930G等位基因、C549T基因型和等位基因分布差异无统计学意义。另外,等位基因930A与549T配对、呈单倍型AT时,cI组的出现率明显高于对照组。结论-A930G的基因突变可能与急性cI的发生相关,同时单倍型AT可能使cI的发病风险增高。     

Increased frequency of the immunoglobulin enhancer HS1,2 allele 2 in coeliac disease

Background: Coeliac disease (CD) is characterized by increased immunological responsiveness to ingested gliadin in genetically predisposed individuals. This genetic predisposition is not completely defined. A dysregulation of immunoglobulins (Ig) is present in CD: since antiendomysium antibodies (anti-EMA) are of the IgA class. One polymorphic enhancer within the locus control region (LCR) of the immunoglobulin heavy chain cluster at the 3′ of the C alpha-1 gene was investigated. The correlation of the penetrance of the four different alleles of the HS1,2-A enhancer of the LCR-1 3′ to C alpha-1 in CD patients compared to a control population was analysed. Methods: A total of 115 consecutive CD outpatients, on a gluten-free diet, and 248 healthy donors, age- and sex-matched, from the same geographical area were enrolled in the study. HS1,2-A allele frequencies were investigated by nested polymerase chain reaction (PCR). Results: The frequency of allele 2 of the enhancer HS1,2-A gene was increased by 30.8% as compared to the control frequency. The frequency of homozygosity for allele 2 was significantly increased in CD patients. Crude odds ratio (OR) showed that those with 2/2 and 2/4 (OR 2.63, P?&;lt;?0.001 and OR 2.01, P?=?0.03) have a significantly higher risk of developing the disease. In contrast, allele 1/2 may represent a protective genetic factor against CD (OR 0.52, P?=?0.01). Conclusions: These data provide further evidence of a genetic predisposition in CD. Because of the Ig dysregulation in CD, the enhancer HS1,2-A may be involved in the pathogenesis.