Sdc1 Overexpression Inhibits the p38 MAPK Pathway and Lessens Fibrotic Ventricular Remodeling in MI Rats

Expression of the proteoglycan syndecan-1 (Sdc1) is increased in rats with myocardial infarction (MI). This study investigated the effects of Sdc1 overexpression on ventricular remodeling and cardiac function in MI and explored the possible mechanism through in vivo transfection of rats with recombinant adenovirus-carrying rat Sdc1 cDNA. Sprague–Dawley rats (n?=?48) underwent intramyocardial injection in the marginal zone of the infarcted area immediately after ligation of the left anterior descending artery. The rats were divided into four groups according to the solution injected: MI Ad-GFP-Sdc1 transfection group, MI Ad-GFP control group, MI saline group, and sham operation group. Cardiac function and collagen expression of each group were examined, and the roles of inflammation, apoptosis, and p38 MAKP signal transduction pathway were investigated. Compared with the rats in the sham operation group, ventricular weight and collagen content increased in MI rats, and cardiac function declined. Substantial inflammatory cell infiltration was seen in the marginal zone of the infarction area, and a great number of myocardial cells were apoptotic. The p38 MAPK signaling pathway was clearly activated. Rats in the MI Ad-GFP-Sdc1 transfection group showed decreased ventricular weight, reduced collagen synthesis, and significant improvement of ventricular remodeling and cardiac function. Post-MI inflammatory cell infiltration and apoptosis was reduced, and the p38 MAPK signaling pathway was inhibited. Overexpression of Sdc1 can improve post-MI ventricular remodeling, and it is possible that the improvement is achieved through reducing apoptosis and suppressing inflammatory response and through the p38 MAPK signal transduction pathway.     

高频彩色多普勒超声对肌肉软组织病变诊断分析

目的:探究肌肉软组织病变患者行高频彩色多普勒超声(彩超)诊断的临床效果。方法:择取2016年5月~2019年1月期间某院收治的45例肌肉软组织病变患者为研究对象,分别为其开展二维灰阶超声和高频彩超检查,对比两种检查方式的诊断准确率,同时分析高频彩超扫描图像。结果:二维灰阶超声对肌肉软组织病变诊断准确率为80.00%(36/45),高频彩超的诊断准确率为95.56%(43/45),差异有统计学意义(P<0.05)。结论:高频彩超对肌肉软组织病变具有良好的诊断效果,可及时发现患者病变严重程度,为制定治疗方案和改善患者预后具有重要作用,因此该种诊断方式值得在临床中进行大力推广。     

大肠癌相关的microRNA谱

由于大肠癌(colorectal cancer,CRC)的筛查措施缺乏灵敏性和特异性,目前大肠癌的阳性筛查率仍然较低,对大肠癌进行早期诊断仍较困难.近年来国内大肠癌的发病率不断上升,对大肠癌的早期基因诊断已成为研究热点.MicroRNA是近年备受关注的一系列非编码的单链小分子核糖核酸序列,其广泛存在于人体的组织和循环系统当中,参与机体多种生理和病理过程的调控.研究发现,microRNA在大肠癌及其癌前疾病的发病发展过程中存在显著变化,在实验模型中通过调节相应的microRNA的表达量可以起到抑制或促进肿瘤细胞生长的作用.由此推测microRNA与大肠癌的发病密切相关,对其进行深入研究可能为大肠癌的早期诊断和治疗提供重要的新思路.     

EphA2和EphrinA 1在宫颈鳞癌中的表达及其与血管生成的关系

目的：探讨EphA2和EphrinA1在宫颈鳞状细胞癌变过程中的表达及其与临床病理因素间的关系。方法应用免疫组织化学方法,检测EphA2和EphrinA1在15例宫颈慢性炎症、35例宫颈上皮内瘤变（CIN）和70例宫颈鳞癌组织中的表达,并采用CD 34抗体标记微血管内皮细胞,计算微血管密度（MVD）。分析EphA 2和EphrinA1的表达与MVD之间的相关性及其与宫颈鳞癌临床病理特征的关系。结果70例宫颈鳞癌组织中,EphA2和EphrinA1阳性率分别高于CIN组和宫颈慢性炎症组织,差异均有统计学意义（P<0.05）。EphA2与EphrinA1的表达与淋巴结转移和侵润深度有关（P<0.05）;EphA2与EphrinA1的表达呈正相关（r=0.306,P<0.05）。EphA2和EphrinA1与年龄、FIGO分期及病理分级之间差异无统计学意义（P>0.05）。宫颈鳞癌的MVD与年龄无关,而与肿瘤分化程度、FI?GO分期、淋巴结转移及局部侵润深度有关（P<0.05）。经Spearman等级相关分析,EphA2与EphrinA1的表达与MVD呈显著正相关（P<0.01）。结论 EphA2和EphrinA1表达均与宫颈鳞癌的发生、发展密切相关,联合检测有助于宫颈鳞癌早期诊断和预后评价,可以为今后宫颈鳞癌的靶向治疗提供新的靶点。     

MICA新等位基因MICA?008：05的DNA序列鉴定及分析

目的：采用直接测序法及克隆测序法确认新等位基因 MICA?008：05。方法采用 Sequence Base Typing （ SBT）法分型技术对MICA的多态性进行常规基因分型,采用克隆测序法进行确认并与已知的等位基因序列进行比对。结果发现1个样本在外显子3上有1个碱基位置与国际通用MICA数据库不相符。该基因与MICA?008：01：01相比在外显子3的碱基位置591出现突变（ C→T）,密码子位置174由TCC→TCT,相应编码氨基酸是同义突变。结论 DNA测序结果表明该基因序列为新的MICA等位基因,已提交GenBank,并被世界卫生组织HLA因子命名委员会正式命名为MICA?008：05。     

High acidity cellulose sulfuric acid from sulfur trioxide: a highly efficient catalyst for the one step synthesis of xanthene and dihydroquinazolinone derivatives

A cellulose sulfonate catalyst (HS-cellulose sulfonate) with high stability, excellent catalytic activity and high acidity value (about 1.55 mmol g⁻¹) was successfully prepared by SO₃ gas phase sulfonation. The basic morphology and nanostructure of the catalyst were determined by HRTEM, XRD, IR, TG, etc. In addition, the catalyst was applied to the catalytic reaction of a dihydroquinazolinone derivative and a xanthene compound, and very valuable results were obtained. The development and preparation of cellulose sulfonate catalysts provide a good approach for the development and application of cellulose, and also an important application of green organic catalytic synthesis methodology.

The HS-cellulose sulfonate catalysed green and efficient one-step synthesis of xanthene and dihydroquinazolinone derivatives.     

王琦教授调体治疗过敏性疾病方法探微?

过敏性疾病为临床难治性疾病,王琦教授临证时采用"辨体-辨病-辨证"相结合的诊疗模式治疗过敏性疾病,收效显著。笔者在跟师学习中总结出王琦老师调体治疗过敏性疾病的以下特点:用药以扶正法为主,祛邪为辅;用药的同时适当接触过敏原;根据过敏性疾病的发病规律,选择特定的用药时间;缓解期调体用药与疾病发作期用药相比更为轻灵精简。     

HPLC测定二维芦丁片复方制剂中芦丁的溶出度和含量

目的 建立HPLC法测定二维芦丁片中芦丁溶出度和含量的方法。方法 溶出度测定以水（含0.5% SDS）为溶出介质,浆法,转速为75r·min-1,45min取样,取样后采用HPLC测定;含量测定采用Thermo C18柱（4.6mm×250mm,5μm）,以磷酸盐缓冲液(0.lmol·L-1 磷酸二氢钠溶液,用磷酸调节pH 值至4.4)-乙腈（80 : 20)为流动相,检测波长为254nm。结果 溶出度测定：芦丁在22.56～2.26μg·ml-1范围内呈良好的线性关系（r=1.0000） ,芦丁的平均回收率为98.2%（RSD=0.4%）,溶出液稳定,3批样品在45min时平均溶出度均在75%以上并且有较好的均一性;含量测定：线性关系良好,芦丁回收率为100.6% (RSD=0.4%, n=9)。结论 该法简单、准确、重复性好,可用于二维芦丁片中芦丁的溶出度及含量的测定。     

Rapid fabrication of porous silicon/carbon microtube composites as anode materials for lithium-ion batteries

Herein, we present a simple and rapid method to synthesize porous silicon/carbon microtube composites (PoSi/CMTs) by adopting a unique configuration of acid etching solution. The CMTs can act as both conductive agent and buffer for Si volume change during the charge and discharge process. The highly reversible capacity and excellent rate capability can be ascribed to the structure, where porous silicon powders are wrapped by a network of interwoven carbon microtubes. The composites show specific capacities of more than 1712 mA h g⁻¹ at a current density of 100 mA g⁻¹, 1566 mA h g⁻¹ at 200 mA g⁻¹, 1407 mA h g⁻¹ at 400 mA g⁻¹, 1177 mA h g⁻¹ at 800 mA g⁻¹, 1107 mA h g⁻¹ at 1000 mA g⁻¹, 798 mA hg⁻¹ at 2000 mA g⁻¹, and 581 mA h g⁻¹ at 3000 mA g⁻¹ and maintain a value of 1127 mA h g⁻¹ after 100 cycles at a current density of 200 mA g⁻¹. Electrochemical impedance spectroscopy (EIS) measurements prove that charge transfer resistance of PoSi/CMT composites is smaller than that of pure PoSi. In this study, we propose a quick, economical and feasible method to prepare silicon-based anode materials for lithium-ion batteries.

We added additives to the acid etching solution and prepared the silicon/carbon microtubes composites using a simple and fast method.     

应用巨噬细胞移动抑制试验观察小鼠血吸虫病细胞免疫

本文报告用改进的巨噬细胞移动抑制试验观察小鼠感染日本血吸虫后对植物血凝素(PHA)、血吸虫成虫抗原(AW)的应答能力。结果表明小鼠感染日本血吸虫后4～20d内,对PHA的应答能力基本正常,而33d后对PHA的应答能力减弱。小鼠感染血吸虫后其淋巴细胞对AW的应答能力在2周内(淋巴结淋巴细胞)和6周内(脾淋巴细胞)应答正常,之后,分别于3和8周开始应答能力减弱,14周后的应答能力均恢复正常。上述结果提示日本血吸虫感染小鼠后淋巴细胞对PHA和AW的应答能力可能存在暂时性免疫抑制现象,特别是在感染早期抑制作用较为明显。