Effect of photobiomodulation on CCC-ESF reactive oxygen species steady-state in high glucose mediums

Lasers in Medical Science - Delayed wound healing is one of the most challenging complications of diabetes mellitus (DM) in clinical medicine, and it is related to the excessive generation of...     

外泌体在胰腺癌中的研究现状与进展

外泌体是一种双层脂质膜连接囊泡样小体，存在于各种体液中，参与细胞及肿瘤微环境之间的物质运输和信号传递。外泌体含有多种生物活性分子，包括脂质、蛋白质、DNA、mRNA以及非编码RNA，可以通过这些活性分子影响肿瘤的发生和发展，甚至可以影响肿瘤的治疗。胰腺癌是一种常见的恶性肿瘤，侵袭性强，预后较差，死亡率高。胰腺癌来源的外泌体是胰腺肿瘤微环境中的重要组成部分，促使胰腺癌细胞成功逃避细胞凋亡的重要因素，并且可以促进肝脏转移微环境的形成。近年来，与胰腺癌相关的外泌体逐渐成为新的研究热点，研究发现外泌体有望成为早期胰腺癌筛查的新型生物学标志，并将为胰腺癌靶向治疗提供可行的技术基础。     

细胞外囊泡的检测及其在非酒精性脂肪性肝病诊断中的价值

细胞外囊泡是双层脂质膜小囊泡,可以由大多数类型的细胞释放,并在大多数体液中可检测到,细胞外囊泡可将其生物活性成分转移到受体细胞或激活靶细胞中的信号转导,发挥细胞间通讯的关键功能,从而参与多种疾病包括肝脏疾病的发生和发展。近年来非酒精性脂肪性肝病患病率上升,除有创的肝活组织检查外,目前还没有可靠的肝脏炎症诊断或纤维化分期方法,寻求相应的无创循环标志物的研究持续活跃,细胞外囊泡是其中较受关注者之一。为此综述了目前关于细胞外囊泡的物理特征、生物成分和分离方法的知识,并介绍了利用循环细胞来源囊泡作为非酒精性脂肪性肝病诊断新标志物的概念。     

Resection of Hilar Cholangiocarcinoma Combined with Left Hepatectomy and Common Hepatic Arteriectomy without Reconstruction

Background/Aims: To detect the feasibility of using synchronous bile duct, left lobe of liver and common hepatic artery resection without reconstruction to improve the therapeutic efficacy of HC. Methodology: A total of 19 patients with hilar cholangiocarcinoma undergoing left-sided hepatectomy, hepatic artery resection and right hepatic duct-jejunum anastomosis from June 2005 to May 2010 in our team were included prospectively in this study. Results: One case died from probable sudden myocardial infarction before discharge from hospital. Little bile leakage occurred in one case. No hepatic insufficiency developed in any cases. A follow-up of 6-66 months was applied and 11 cases were still alive at the end. Conclusions: Hepatic Arteriectomy is viable with lower total bilirubin and the excision weight up to about 30% of the standard liver.     

双侧结节性甲状腺肿合并桥本甲状腺炎不同术式的疗效比较

目的：比较不同术式对双侧结节性甲状腺肿（NG）合并桥本甲状腺炎（HT）的疗效。 方法：收集2006年1月—2013年7月经手术治疗并病理证实的双侧NG合并HT患者的临床资料,将患者按照手术切除范围分为甲状腺大部/部分切除组、甲状腺次全切除组、甲状腺全切除组,每组均选取30例,比较各组术前、术中及术后相关指标。 结果：3组患者术前临床资料具有可比性（均P>0.05）;大部/部分切除组手术时间明显短于另两组（均P<0.05）,而术中出血量、住院总天数、术后住院天数、留置引流天数、引流量方面,3组间差异均无统计学意义（P>0.05）;3组均未发生术后大量出血及永久性声音嘶哑和低钙血症,暂时性声音嘶哑发生率差异无统计学意义（P>0.05）,全切除组暂时性低钙血症发生率高于另两组（均P<0.05）,而大部/部分切除组复发率高于另两组（均P<0.05）。 结论：双侧NG合并HT行甲状腺大部/部分切除术手术时间短,但复发率较高;全切除术发生暂时性低钙血症较多。     

A property-oriented adaptive design framework for rapid discovery of energetic molecules based on small-scale labeled datasets

It remains an important challenge to apply machine learning in material discovery with limited-scale datasets available, in particular for the energetic materials. Motivated by the challenge, we developed a Property-oriented Adaptive Design Framework (PADF) to quickly design new energetic compounds with desired properties. The PADF consists of a search space, machine learning model, optimization algorithm and an evaluator based on quantum mechanical calculations. The effectiveness and generality of the PADF were assessed by two case studies on the heat of formation and heat of explosion as the target properties. 88 compounds were selected as the initial training dataset from the search space containing 84 083 compounds generated. SVR.lin/Trade-off coupled with E-state + SOB and KRR/KG coupled with CDS + E-state + SOB were determined to be the best combination pairs for the heat of formation and the heat of explosion, respectively. Most of the ten compounds selected from the first ten iterations exhibit better properties than the optimal sample in the initial dataset. Besides, the heat of explosion as the target property outperforms the heat of formation in designing energetic compounds with high detonation performance. In particular, a new compound selected at the 3rd iteration exhibits high potential as an explosive. Our strategy could be extended to other domains limited by small-scale datasets labeled.

In this work, we construct a self-adaptive design framework to efficiently screen energetic compounds with the desired heat of formation and heat of explosion from the vast chemical space unexplored.     

重组沙门氏菌VNP20009-M对骨肉瘤的治疗作用

目的 研究携带甲硫氨酸酶基因的减毒沙门氏菌VNP20009-M对骨肉瘤的治疗作用及其机制。方法 将重组沙门氏菌VNP20009-M与骨肉瘤细胞MNNG-HOS共培养;骨肉瘤细胞MNNGHOS、U2OS及SaoS-2均高表达甲硫氨酸酶基因后探索细胞增殖、迁移及凋亡能力的变化;构建MNNG-HOS裸鼠皮下荷瘤模型,评价不同剂量的VNP20009-M在动物模型中的治疗效果。结果 通过质粒PCR验证甲硫氨酸酶基因只存在于目的菌株VNP20009-M中,且具有较高的甲硫氨酸酶活性,重组沙门氏菌构建成功。VNP20009-M显著诱导骨肉瘤细胞MNNG-HOS的凋亡。相比对照组,甲硫氨酸酶基因过表达的骨肉瘤细胞增殖、迁移能力被显著抑制。VNP20009-M治疗后小鼠皮下肿瘤生长被显著抑制。结论 VNP20009-M可诱导骨肉瘤细胞凋亡并抑制癌细胞增殖和迁移,可以作为一种新型高效的药物为临床提供新的治疗方式。     

冻融胚胎移植周期中不同辅助生殖技术助孕方式和移植不同发育阶段胚胎对出生性别比的影响

目的:探讨冻融胚胎移植（frozen-thawed embryo transfer, FET）周期中不同辅助生殖技术（assisted reproductive technology, ART）助孕方式和移植不同发育阶段胚胎对新生儿性别的影响。方法:回顾性队列研究分析2010年4月至2018年10月期间于广州市妇女儿童...     

Large-scale identification and translocation of type IV secretion substrates by Coxiella burnetii

Coxiella burnetii is an obligate intracellular bacterial pathogen responsible for acute and chronic Q fever. This bacterium harbors a type IV secretion system (T4SS) highly similar to the Dot/Icm of Legionella pneumophila that is believed to be essential for its infectivity. Protein substrates of the Coxiella T4SS are predicted to facilitate the biogenesis of a phagosome permissive for its intracellular growth. However, due to the lack of genetic systems, protein transfer by the C. burnetii Dot/Icm has not been demonstrated. In this study, we report the identification of 32 substrates of the C. burnetii Dot/Icm system using a fluorescence-based β-lactamase (TEM1) translocation assay as well as the calmodulin-dependent adenylate cyclase (CyaA) assay in the surrogate host L. pneumophila. Notably, 26 identified T4SS substrates are hypothetical proteins without predicted function. Candidate secretion substrates were obtained by using (i) a genetic screen to identify C. burnetii proteins interacting with DotF, a component of the T4SS, and (ii) bioinformatic approaches to retrieve candidate genes that harbor characteristics associated with previously reported substrates of the Dot/Icm system from both C. burnetii and L. pneumophila. Moreover, we have developed a shuttle plasmid that allows the expression of recombinant proteins in C. burnetii as TEM fusion products. Using this system, we demonstrated that a Dot/Icm substrate identified with L. pneumophila was also translocated by C. burnetii in a process that requires its C terminus, providing direct genetic evidence of a functional T4SS in C. burnetii.