雷公藤甲素对大鼠肺切除加野百合碱诱导肺动脉高压的影响

目的 观察雷公藤甲素(TL)对大鼠左肺切除加野百合碱所致肺动脉高压和右心室肥厚的影响作用. 方法将SD雄性大鼠随机分为正常组、模型组、TL连续治疗组、安慰剂1组、TL延迟治疗组和安慰剂2组.采用光镜、图像分析和免疫组织化学方法,观察各组大鼠肺动脉平均压,右心室/(左心室 室间隔)质量比,肺小动脉管壁百分比,肺小动脉无肌性动脉肌化程度,新生内膜所致血管阻塞计分的变化.结果 ①模型组各指标均高于正常组(P＜0.01).②两治疗组各指标均小于相应两安慰剂组和模型组(P＜0.05).③两治疗组之间除肺小动脉无肌性动脉肌化程度外其余各指标比较差异有统计学意义(P＜0.05).结论 雷公藤甲素对肺切除加野百合碱所致肺动脉高压和右心室肥大有逆转作用,且对肺动脉高压形成前和形成后均有作用.     

原发性高血压伴左心室肥厚患者常规治疗效果的影响因素分析

目的 探讨原发性高血压（EH）伴左心室肥厚（LVH）患者常规治疗效果的影响因素。方法 选取2018年1月—2020年1月在河北北方学院附属第一医院接受厄贝沙坦治疗的400例EH伴LVH患者为研究对象,根据治疗效果将其分为有效组（359例）、无效组（41例）,比较两组患者一般资料、治疗前间歇性左束支传导阻滞（LBBB）发生率及心率变异性（HRV）指标,采用多因素Logistics回归分析EH伴LVH患者治疗效果不佳的影响因素。结果 治疗后,有显效、有效、无效患者分别为269例、90例、41例,有效率为89.75%。两组患者性别及入院时极低频、低频（LF）/高频（HF）比较,差异无统计学意义（P>0.05）;两组患者年龄、高血压病程、入院时血压、入院时LVH、入院时间歇性LBBB发生率,以及入院时正常RR间期标准差（SDNN）、相邻RR间期之差的均方根（RMSSD）、相邻RR间期差值> 50 ms的RR间期所占百分数、HF、LF比较,差异有统计学意义（P <0.05）。多因素Logistic回归分析结果显示：年龄≥65岁、高血压病程≥10年、入院时舒张压较高、收缩压较高、...     

卒中后抑郁的相关危险因素

卒中后抑郁(PSD)是卒中后常见的并发症之一,发病率在40%～60%之间,它不仅影响患者神经及肢体功能的康复,降低患者的生活质量,而且增加卒中的的死亡率.虽然卒中和抑郁之间的关系众所周知,但PSD的发生原因目前仍不明确,相关危险因素的研究结果也存在较大争议.本文对这一问题作一简要综述.……     

垂体腺瘤中雌激素受体基因的表达

目的　研究人垂体腺瘤中雌激素受体基因 (estrogenreceptorgene ,ER)mRNA与蛋白水平的表达及其与垂体腺瘤生物学特性的关系。方法　用免疫组化法和逆转录 聚合酶链反应 (RT PCR法 ) ,检测 6 0例各种类型垂体腺瘤标本中ER蛋白的表达 ,比较不同类型垂体腺瘤ER蛋白表达的差异及ER蛋白表达与mRNA表达的差异。结果　泌乳素腺瘤、促性腺激素细胞瘤中均有ER蛋白表达 ,其表达与mRNA表达一致 ;无功能腺瘤中 2例有ER蛋白表达 ,其蛋白表达与mRNA表达不一致 ;其它类型垂体腺瘤未发现ER基因表达。结论　ER基因表达的检测可有助于评价PRL腺瘤的增殖活性及筛选抗雌激素治疗对象。ER基因的表达异常可能与PRL腺瘤及促性腺激素细胞瘤的发生、发展有关     

Susceptibility weighted imaging: neuropsychologic outcome and pediatric head injury

Traumatic brain injury is among the most frequent pediatric neurologic disorders in the United States, affecting multiple aspects of neuropsychologic functioning. This study assessed the efficacy of susceptibility weighted imaging as a predictor of long-term neuropsychologic functioning after pediatric brain injury compared with magnetic resonance spectroscopic imaging. Susceptibility weighted imaging is a relatively new method that is considered superior to traditional magnetic resonance imaging sequences for detecting hemorrhagic diffuse axonal injury. In this study, imaging and spectroscopy were acquired 6 +/- 4 days after injury. Measures of neuropsychologic functioning were administered to 18 children and adolescents 1-4 years post injury. Negative correlations between lesion number and volume with neuropsychologic functioning were demonstrated. Lesion volume explained over 32% of the variance in cognitive performance, explaining at least an additional 20% beyond injury severity and age at injury alone and 19% beyond magnetic resonance spectroscopic metabolite variables. Exploratory analyses resulted in notable trends, with lesions in deeper brain regions more strongly associated with poorer neuropsychologic performance. Improved detection of the extent of diffuse axonal injury following a brain injury will allow for a better understanding of its association with long-term outcome, which in turn can improve prognostic efficacy for effective treatment planning.     

自杀率变化趋势的性别特征及自杀方式影响的研究进展

本综述的目的是整体了解全球多国自杀率波动情况,分析自杀率趋势的性别特征,探讨自杀方式对自杀率变动趋势的影响,并推测我国自杀率变动的原因。近二十年来,包括我国在内的大多数国家的自杀率下降,南非等国的自杀率变化趋势基本平稳,而英国、美国、巴西等少数国家的自杀率上升。自杀率的变化趋势存在性别差异,也受到自杀方式的构成和致死性变化的影响。我国自杀率下降主要在于女性自杀率下降和最常见的服农药自杀的减少。     

CNQX对乙醇、乙醛调控大脑皮质神经元神经甾体水平的影响

目的 研究乙醇、乙醛对原代培养大鼠大脑皮质神经元神经甾体水平的影响以及与AMPA受体调控的相关性. 方法 应用AMPA受体拮抗剂CNQX阻断AMPA受体,用50mmol/L乙醇或25 mmol/L乙醛处理神经元,收集细胞培养上清,采用高效液相色谱质谱法分离测定游离型神经甾体孕烯醇酮(PREG)、脱氢表雄酮(DHEA)、别孕烯醇酮(AP)及结合型神经甾体脱氢表雄酮硫酸酯(DHEAS)、孕烯醇酮硫酸酯(PREGS)的含量,观察CNQX对乙醇、乙醛调控原代培养神经元神经甾体水平的影响. 结果乙醇可明显升高神经元PREG、AP和PREGS的水平,与PBS对照组比较差异有统计学意义(P＜0.05);乙醛可明显升高神经元PREG、DHEA、PREGS和DHEAS的水平,与PBS对照组比较差异有统计学意义(P＜0.05).CNQX反转了乙醇升高PREG、PREGS水平的作用以及乙醛升高PREG、DHEAS水平的作用,却使AP水平明显升高,组间比较差异有统计学意义(P＜0.05). 结论 乙醇、乙醛对大脑皮质神经元神经甾体PREG、DHEA、AP、PREGS和DHEAS的影响各不相同,CNQX反转了乙醇上调PREG、PREGS水平的作用以及乙醛上调PREG、DHEAS水平的作用.     

正念减压疗法联合化疗对骨髓瘤骨病患者生存质量的影响

目的探究正念减压疗法联合化疗对提高骨髓瘤骨病患者的生存质量及疾病缓解率的效果,为改善骨髓瘤骨病患者的生活质量和治疗依从性提供参考。方法选取2018年1月-2020年1月在绵阳市第三人民医院血液科住院治疗的84例骨髓瘤骨病患者为研究对象,采用随机数字表法分为研究组和对照组各42例,两组患者均按BDT(硼替佐米+地塞米松+沙利度胺)化疗方案治疗3~5个周期,研究组在此基础上接受为期8周的正念减压疗法干预。在干预前、干预后第3月、第6月采用卡氏评分表(KPS)评定生存质量,采用疼痛强度数字评分(NRS)评定骨痛程度,按照国际骨髓瘤工作组疗效标准(IMWG标准)进行疗效评估。结果干预后第6个月,研究组和对照组生活质量改善率差异有统计学意义(61.90%vs.33.33%,χ2=6.65,P<0.05)。干预后第3个月及第6个月,研究组NRS评分均低于对照组,差异均有统计学意义(P均<0.05),但两组疾病缓解程度比较差异均无统计学意义(P均>0.05)。结论正念减压疗法联合化疗对改善骨髓瘤骨病患者生存质量、缓解骨痛的效果可能优于单纯传统化疗。     

青年卒中危险因素研究新进展

卒中好发于老年人,但近年来研究显示青年人卒中发病率呈逐年上升趋势。青年卒中病因复杂繁多,主要的病因有早发性动脉粥样硬化、颈部动脉夹层、心源性脑栓塞、免疫性疾病等。现就青年卒中的病因、危险因素予以综述。     

Novel urea derivative-loaded PLGA nanoparticles to inhibit caries-associated Streptococcus mutans

Caries is the most common chronic infectious disease in the human oral cavity and the existing anti-caries agents may lead to drug resistance and microecological imbalance. A novel urea derivative, 1,3-bis[3,5-bis(trifluoromethyl)phenyl]urea, has a potentially prominent antibacterial effect on cariogenic bacterial strain Streptococcus mutans UA159. In this study, we encapsulated the water-insoluble urea derivative in poly(lactic-co-glycolic acid) (PLGA) nanoparticles, performed physicochemical characterizations and explored its potential as a caries-preventive agent. The results showed that the drug-loaded PLGA nanoparticles exhibited satisfying surface morphology, particle size, size distribution and stability. With an optimized theoretical drug loading (10%), the drug-loaded PLGA nanoparticles exhibited negligible cytotoxicity against human oral squamous cell carcinoma cells. We noticed a biphasic drug release in vitro and the rate and cumulative release was higher in an acidic environment (pH 4.5) compared to a neutral environment (pH 7.4). The drug-loaded PLGA nanoparticles significantly inhibited the growth and lactic acid production of planktonic S. mutans as well as S. mutans biofilms. Our results indicate that the novel urea derivative-loaded PLGA nanoparticles serve as a promising anti-caries agent with remarkable pharmaceutical characteristics, low cytotoxicity, and satisfying antimicrobial effect.

1,3-Bis[3,5-bis(trifluoromethyl)phenyl]urea-loaded PLGA nanoparticles exhibited satisfactory physicochemical characteristics and significantly inhibited the growth and lactic acid production of S. mutans.