狼疮性肾炎肾血管损害和miR-145的表达

目的评估狼疮性肾炎(LN)患儿肾血管损害(RVLs)并检测肾血管中mi R-145的表达。方法收集41例经肾活检证实为LN的系统性红斑狼疮(SLE)患儿的临床资料,评估肾小球损害和RVLs。根据RVLs评分及病理类型分组。采用原位杂交法检测mi R-145在肾血管中的表达。比较不同病理分型组间RVLs、肾血管mi R-145表达及肾小球损害评分差异;比较不同RVLs组间临床指标、肾小球损害评分及肾血管mi R-145表达差异。结果不同LN病理类型间,RVLs的差异无统计学意义(P0.05),肾血管mi R-145表达及肾小球损害评分差异有统计学意义(P0.01)。不同RVLs组间,临床指标及肾小球损害差异均无统计学意义(P0.05),而肾血管mi R-145表达差异有统计学意义(P0.01)。结论 LN患儿存在RVLs,mi R-145可能参与RVLs的发生机制。     

Neurodegenerative changes and apoptosis induced by intrauterine and extrauterine exposure of radiofrequency radiation

Adverse health effects of radiofrequency radiation (RFR) on the ongoing developmental stages of children from conception to childhood are scientifically anticipated subject. This study was performed to identify the effects of global system for mobile communications (GSM) modulated mobile phone like RFR in 1800 MHz frequency on oxidative DNA damage and lipid peroxidation beside the apoptotic cell formation, using histopathological and immunohistochemical methods in the brain tissue of 1-month-old male and female New Zealand White rabbits that were exposed to these fields at their mother's womb and after the birth. Oxidative DNA damage and lipid peroxidation levels were investigated by measuring the 8-hydroxy-2′-deoxyguanosine (8-OHdG) and malondialdehyde (MDA) levels, respectively. Histopathological changes were observed using by hematoxylin and eosin (HE) staining. Apoptotic cells were detected in the examined organs by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) staining.For both male and female infants; 8-OHdG levels increased in the group exposed to RFR in both intrauterine and extrauterine periods compared to the infants that were never exposed to RFR and the ones were exposed when they reached one month of age (p < 0.05). MDA results were different for male and female rabbits. There was no difference between all female infant groups (p > 0.05), while only intrauterine exposure significantly causes MDA level increase for the male infants. HE staining revealed mild lessions in neuronal necrobiosis in brain tissues of female rabbits that had only intaruterine exposure and male rabbits had only extrauterine exposure. Gliosis were mildly positive in brain tissues of rabbits that are exposed only intrauterine period, also the group exposed both intrauterine and extrauterine periods. However, there was no apoptotic change detected by TUNEL staining in the brain tissues of all groups.     

益气活血利水方对慢性心力衰竭大鼠心肌重构的影响

目的:观察益气活血利水方益心泰对慢性心力衰竭大鼠心肌重构的影响。方法:采用冠状动脉结扎法建立慢性心力衰竭(CHF)大鼠模型,将造模成功的Wistar雄性大鼠随机分为模空组、益心泰高剂量组、益心泰中剂量组、益心泰低剂量组和科索亚组,另设正常对照组。益心泰低、中、高剂量组分别予以益心泰灌胃,剂量分别为2.6g/(kg·d)、5.2 g/(kg·d)、10.4 g/(kg·d)。科索亚组灌胃剂量为5.21g/(kg·d)。模型组灌服同等体积的生理盐水。每天上午灌胃1次,共8周。正常对照组不做任何处理。8周后检测心衰大鼠心脏超声指标、心肌重构指标。同时采用H-E染色和Massion染色观察左心室心肌形态结构变化。结果:与模空组比较,益心泰低、中、高剂量组和科索亚组LVIDs、LVIDd均显著降低,LVEF、LVFS明显升高(P0.05)。而益心泰高剂量组与科索亚组各项指标比较差异无统计学意义(P0.05)。结论:益心泰可改善心衰大鼠的心肌重构,延缓心衰的进展。     

A new concept of the contraction–extension property of the left ventricular myocardium

ObjectivesUsing newly developed ultrasonic technology, we attempted to disclose the characteristics of the left ventricular (LV) contraction–extension (C–E) property, which has an important relationship to LV function.MethodsStrain rate (SR) distribution within the posterior wall and interventricular septum was microscopically measured with a high accuracy of 821 μm in spatial resolution by using the phase difference tracking method. The subjects were 10 healthy men (aged 30–50 years).ResultsThe time course of the SR distribution disclosed the characteristic C–E property, i.e. the contraction started from the apex and propagated toward the base on one hand, and from the epicardial side toward the endocardial side on the other hand. Therefore, the contraction of one area and the extension of another area simultaneously appeared through nearly the whole cardiac cycle, with the contracting part positively extending the latter part and vice versa. The time course of these propagations gave rise to the peristalsis and the bellows action of the LV wall, and both contributed to effective LV function.The LV contraction started coinciding in time with the P wave of the electrocardiogram, and the cardiac cycle was composed of 4 phases, including 2 types of transitional phase, as well as the ejection phase and slow filling phase. The sum of the measurement time duration of either the contraction or the extension process occupied nearly equal duration in normal conditions.ConclusionThe newly developed ultrasonic technology revealed that the SR distribution was important in evaluating the C–E property of the LV myocardium. The harmonious succession of the 4 cardiac phases newly identified seemed to be helpful in understanding the mechanism to keep long-lasting pump function of the LV.     

The impact of bilateral cerebellar damage on theory of mind,empathy and decision making

The extensive infarction affecting the posterior vermis and the medial and posterior regions of both cerebellar hemispheres, as well as the small central pontine lesion, seems to have disrupted multiple cerebral and brainstem cerebellar loops. These loops process information related to many cognitive domains, behavior and emotion, including decision making, empathy and theory of mind.     

Computational modeling of electromechanical propagation in the helical ventricular anatomy of the heart

The classical interpretation of myocardial activation assumes that the myocardium is homogeneous and that the electrical propagation is radial. However, anatomical studies have described a layered anatomical structure resulting from a continuous anatomical helical disposition of the myocardial fibers. To further investigate the sequence of electromechanical propagation based on the helical architecture of the heart, a simplified computational model was designed. This model was then used to test four activation patterns, which were generated by propagating the action potential along the myocardial band from different activation sites.     

急性心肌梗死患者糖化血红蛋白浓度变化分析

目的探究急性心肌梗死患者糖化血红蛋白浓度变化的意义.方法以2009年11月~2012年1月收治的急性心肌梗死患者87例为研究对象.根据糖化血红蛋白浓度分为正常组(49例)与异常组(38例),两组患者入院后采用介入治疗.对比两组患者心功能分级、治疗效果和并发症.结果正常组患者心功能更好,临床治疗效果佳,手术后并发症发生率低,与异常组患者比较,差异有统计学意义(P<0.05).结论急性心肌梗死患者糖化血红蛋白浓度与疾病严重程度、治疗效果有关,有助于临床诊治进行预测.     

Correlation of Echocardiographic Epicardial Fat Thickness with Severity of Coronary Artery Disease in Patients with Acute Myocardial Infarction

The aim of this study was to test the hypotheses that epicardial adipose tissue (EAT) can be a marker of severe coronary artery disease in patients with acute myocardial infarction. Overall, 373 cases who underwent coronary angiography were classified into 2 groups by SYNTAX score: low‐score and high‐score group. EAT was measured by transthoracic echocardiography. Obtained data were compared using Pearson correlation analyses and univariate and multiple logistic regression analysis. The results showed that EAT in the high‐score group was significantly greater than in the normal group (5.6 ± 1.1 vs. 4.1 ± 1.0 mm, P < 0.01). EAT had a positive correlation with SYNTAX score (r = 0.61, P < 0.01). Receiver operating characteristic (ROC) curve analyses showed that EAT could reliably discriminate patients with high SYNTAX score (≥33) [AUC: 0.86, 95% confidence interval (CI): 0.822–0.898, P < 0.01]. Multivariate regression analyses showed that EAT was an independent predictor for major in‐hospital events. These data showed an association between EAT and SYNTAX score.