应用3.0T MRI评价缺血性脑血管病与鼻窦炎性病变的关系

目的:应用3.0TMRI从影像学角度探讨缺血性脑血管病与鼻旁窦炎性病变的关系及鼻旁窦炎性病变的MRI表现。方法:①分组及检测:2006-10/2007-08河北医科大学第二医院收治经临床及影像学证实为缺血性脑血管病患者218例为病例组,健康体检者218例为对照组,应用美国GE公司Signa Excite HD 3.0T高场强MR扫描仪常规行MRI及MRA检查。②评估指标:MRI图像观察以轴位T2-FSE、轴位T1-FLAIR序列为主,辅以轴位T2-FLAIR、矢状位T1-FLAIR序列,观察并记录脑实质MRI表现、鼻旁窦有无炎性病变。MRA图像观察以MIP重组后图像为主,辅以MRA源图像,观察并记录颅内血管异常情况。主要观察指标包括额窦、筛窦、蝶窦、上颌窦受累情况,各窦病变类型(黏膜增厚、炎性积液、黏膜下囊肿)及相应的MRI表现。结果:①病例组所有患者前循环及后循环系统血管均存在不同程度的动脉粥样硬化改变,143例患者脑实质出现缺血性病变;对照组脑实质及脑血管均未见异常改变。②病例组鼻旁窦有病变者123人次(56.4%),上颌窦病变96例,筛窦病变58例,蝶窦病变30例,额窦病变15例;对照组鼻旁窦有病变者54人次(24.8%),上颌窦病变8例,筛窦病变34例,蝶窦病变2例,额窦病变4例。病例组鼻旁窦炎性病变明显较对照组多(χ2=45.281,P=0.000)。相关系数C=0.91。结论:缺血性脑血管病患者鼻旁窦炎性病变发病率高,缺血性脑血管病与鼻旁窦炎性病变间有一定的相关性。     

在体微血管内测定肿瘤细胞黏附性的实验方法

目的:介绍一种用于研究在体微血管内肿瘤细胞黏附的实验原理和实现方法。方法:利用显微镜在体测量毛细管前小静脉里肿瘤细胞黏附率,每根微血管以1000μm/s的速度灌注(2～4)×109L-1的肿瘤细胞。结果:微针尖注射速度和压力差成正比,显微镜可观察肿瘤细胞在血管里黏附个数随时间的变化。结论:该方法可控制血管内压力和流速及灌注肿瘤细胞的浓度等,模拟微血管正常生理状态下不同条件下肿瘤细胞的黏附特性。     

Intestinal lactase deficiency in an apparently normal Peruvian population

The prevalence of milk and lactose intolerance and intestinal lactase deficiency was studied in 30 apparently healthy Peruvian individuals. At the same time, 20 milk-intolerant persons were included in the study. According to the results of lactose-tolerance tests and intestinal lactase assays, one-third of the 30 were considered normal and were used as controls. The other two-thirds were found to be abnormal and were referred to asasymptomatics; they tolerated well small amounts of milk consumed daily. Upon lactose load, they developed gastro-intestinal symptoms, and maximal rise of blood glucose was below normal limits. Enzymatic assay indicated that they were deficient in intestinal lactase. The remaining 20 were intolerant to milk and the results of their tests were abnormal. Sucrase activity was similar in the 3 groups. This high incidence of lactase deficiency in apparently normal individuals seems to be acquired.     

反义寡核苷酸抗肝炎病毒研究进展

反义核酸是指能够与基因组DNA有意义链(sense sequence),或有意义链的转录体互补结合的核苷酸序列,包括反义RNA、反义NDA、反义寡核苷酸具有核酸特异切割活性的核酶等.反义寡核苷酸(antisense oligodeoxynucleotide,ASODN)是指合成的20个碱基左右的一小段核苷酸,按照Watson-Crick碱基配对原则与特定的靶序列杂交,从而抑制基因表达.其作用方式有2种:①与mRNA杂交,单纯阻断核糖体对mRNA的翻译;②激活一种降解mRNA的选择性内切酶RNaseH.ASODN治疗具有高特异性,是一种改变肿瘤、AIDS等病毒感染性疾病中操纵基因表达的治疗方法.本文就ASODN的化学修饰、药理学研究,以及其抗肝炎病毒作用作一综述.     

Specific gel-cream as adjuvant to oral isotretinoin improved hydration and prevented TEWL increase – a double-blind, randomized, placebo-controlled study

Background  Hydrating and emollient products are often recommended to patients under isotretinoin therapy to control the most frequent mucocutaneous side effects and to improve adherence to treatment.
Aims  To assess, using noninvasive biophysical tests, the clinical and instrumental effectiveness of a hydrating gel-cream compared with placebo as an adjuvant to isotretinoin for treatment of facial skin in patients with inflammatory acne.
Methods  Prospective, double-blind, randomized study, using MULTI SKIN MC750, on the adjuvant effect of a hydrating gel-cream for acne (active product) vs. a gel-cream without active substances (placebo). Follow-up lasted 3 months.
Results  Sixty-six patients were included. Thirty-four were administered the active product, and 32 placebo. Though the number of lesions fell significantly in both groups, the mean number of papules on day 30 was significantly lower in the active product group. The active product group showed a significant increase in hydration, while the placebo group showed a significant increase in transepidermal water loss (TEWL). Seborrhoea decreased significantly in both groups; there were no differences between them.
Conclusions  Compared with placebo, the specific gel-cream with active products as an adjuvant to oral isotretinoin improved hydration, prevented TEWL increase, and reduced inflammatory acne lesions after 30 days.     

Proportion of isolated clinical hypertension in primary care settings. Comparison of target organ damage in patients with isolated clinical hypertension and patients with sustained arterial hypertension

The aim of this study was to determine the proportion of isolated clinical hypertension (ICH) in newly diagnosed hypertensive patients, and to compare the incidence of target organ damage (TOD) in ICH and sustained hypertension patients. Participants. In a multi-centre study involving 14 primary care centres in Girona, Spain, 140 researchers recruited 214 newly diagnosed hypertensive patients 15-75 years of age, without history of cardiovascular events. Period of study. 2004-6. Method. Self-blood pressure monitoring (SBPM) and ambulatory blood pressure monitoring (ABPM). Evaluation. Anamnesis including blood pressure, physical examination and analysis (creatinine, albumin/creatinine index), electrocardiogram (left ventricular hypertrophy) and retinography (fundus damage). Results. In 129 (60.3%) subjects with sustained hypertension and 85 (39.7%) with ICH, no significant differences were found relative to gender, age, body mass index or blood pressure (155/90 vs 154/90 mmHg, respectively). Cholesterol levels were significant differences between both groups (5.97 mmol/l in sustained hypertension vs 5.64 mmol/l in ICH, p = 0.029). The proportion of ICH was approximately 40%. TOD incidence in sustained hypertensives was similar to that of ICH patients.     

几种色谱技术在中药质量控制中的应用进展

目的：为了促进现代分析方法应用中药分析,方法：总结了几种色谱在中药质量控制中的进展,结果：毛细管电泳法,超临床色谱法、高效液相色谱法、气相色谱法和薄层色谱扫描法已大量用于中药质量控制。结论：现代色谱方法可用于中药的质量控制。