Galectin 2 regulates JAK/STAT3 signaling activity to modulate oral squamous cell carcinoma proliferation and migration in vitro

Background:Galectin 2(LGALS2)is a protein previously reported to serve as a mediator of disease progression in a range of cancers.The function of LGALS2 in oral squamous cell carcinoma(OSCC),however,has yet to be explored,prompting the present study to address this literature gap.Methods:Overall,144 paired malignant tumor tissues and paracancerous OSCC patient samples were harvested and the LGALS2 expression levels were examined through qPCR and western immunoblotting.The LGALS2 coding sequence was introduced into the pcDNA3.0 vector,to enable the overexpression of this gene,while an LGALS2-specific shRNA and corresponding controls were also obtained.The functionality of LGALS2 as a regulator of the ability of OSCC cells to grow and undergo apoptotic death in vitro was assessed through EdU uptake and CCK-8 assays,and flow cytometer,whereas a Transwell system was used to assess migratory activity and invasivity.An agonist of the Janus Kinase 2(JAK2)/Signal Transducer and Activator of Transcription 3(STAT3)pathway was also used to assess the role of this pathway in the context of LGALS2 signaling.Results:Here,we found that lower LGALS2 protein and mRNA expression were evident in OSCC tumor tissue samples,and these expression levels were associated with clinicopathological characteristics and patient survival outcomes.Silencing LGALS2 enhanced proliferation in OSCC cells while rendering these cells better able to resist apoptosis.The opposite was instead observed after LGALS2 was overexpressed.Mechanistically,the ability of LGALS2 to suppress the progression of OSCC was related to its ability to activate the JAK/STAT3 signaling axis.Conclusion:Those results suggest a role for LGALS2 as a suppressor of OSCC progression through its ability to modulate JAK/STAT3 signaling,supporting the potential utility of LGALS2 as a target for efforts aimed at treating OSCC patients.

一种机载LiDAR点云电力线自动化提取和重建方法

针对电力线走廊的机载LiDAR点云,提出了一种电力线自动化提取和重建方法。首先构建规则格网DEM,采用相对高程获得远地面点,分析点云空间分布特征对电力线点云进行粗提取,并利用局部高差的区域生长分割算法进行精细提取;其次,采用最小二乘拟合每个分割单元在xoy平面内的直线,分析该直线与对应高程数据的一阶导数变化趋势,利用密度聚类算法实现电力线的自动分段;最后,依据邻接电力线拟合求交点方式检测悬挂点位置,并采用多项式模型重构每根电力线矢量。实验结果表明,该方法能够自动化检测悬挂点位置,提取准确率高、拟合误差低,具有一定的参考价值。

基于Simulink的LFMCW引信仿真

为了提高引信的最佳毁伤控制能力,本文结合LFMCW引信特点对差拍信号进行了理论分析,得出了影响距离分辨率、速度分辨率等指标的因素,并利用Simulink软件搭建了相关的仿真模型,对通过二维傅里叶变换获取距离、速度信息的方法进行仿真验证。该模型可以模拟引信回波信号、噪声信号的产生以及中频信号处理的过程。仿真结果验证了算法的可行性与模型的准确性,为引信系统优化设计奠定了基础。

HDAC8基因变异所致Cornelia de Lange综合征1例报告

目的探讨Cornelia de Lange综合征(CdLS)的临床表型及基因型特点。方法回顾分析1例确诊CdLS患儿的临床资料,并总结分析国内已报道病例的情况。结果女性患儿,1岁2月龄,有特殊外貌,智力及运动发育落后,合并四肢畸形及听力异常。基因检测发现患儿HDAC8基因c.675C>A(p.Y 225X)存在新发杂合无义变异,根据ACMG指南预测为致病性变异,确诊CdLS。通过对万方、维普、中国知网及PubMed数据库搜索,发现国内报道CdLS病例46例。其中26例行基因检查,20例(76.9%)存在NIPBL基因变异,3例(11.5%)HDAC8基因变异,1例(3.8%)SCM1A基因变异,2例未发现与临床吻合的致病性基因变异,表型各异。结论CdLS患儿存在特殊外貌、生长发育迟缓、多器官受累、听力障碍,多数可通过典型临床表型诊断,基因检测有助于非典型患者的早期诊断。

Lifeport灌注液中生物标志物与尸体供体肾移植术后移植肾功能延迟恢复的相关性分析

目的分析Lifeport灌注液中生物标志物与尸体供体肾移植术后移植肾功能延迟恢复(delayed graft function,DGF)的相关性,为临床决策提供理论依据。方法回顾性分析2019年6月1日—2019年8月31日期间西安交通大学第一附属医院43例DD肾脏应用Lifeport进行灌注维护的参数指标、灌注液生物标志物及实施肾移植的临床资料,对DGF的发生率及肾功能恢复时间等情况进行总结和分析。结果本研究的DGF发生率为18.6%(8/43),肾功能恢复时间为(11.7±10.6)d;DGF组肾功能恢复时间〔(30.8±22.7)d〕较NO-DGF组〔(6.8±7.0)d〕显著延长(P<0.001)。多因素logistic回归分析显示终末阻力(OR=1.879,95%CI=1.145~3.56)和灌注液标志物谷胱甘肽S-转移酶(glutathione S-transferase,GST)(OR=1.62,95%CI=1.23~2.46)是DGF的独立危险因素。比较GST联合终末阻力预测DGF的ROC曲线下面积(area under curve,AUC)与单独应用终末阻力预测DGF的AUC,预测准确性相较于单独应用终末阻力显著提高(P=0.023)。结论灌注参数(终末阻力)联合灌注液生物标志物(GST)可提高预测DGF的能力。

牡丹花中不同形态酚类化合物及其抗氧化和α-葡萄糖苷酶抑制活性

对丹凤和香玉两种牡丹花中的游离酚、酯键合态酚、糖苷键合态酚和不溶性结合态酚进行提取,测定不同形态酚类化合物中总酚、总黄酮含量及其主要化合物组成和含量,并对其抗氧化活性和α-葡萄糖苷酶抑制活性进行研究。结果表明,丹凤和香玉牡丹花的游离酚的总酚和总黄酮含量最高,总酚含量分别为31.45、32.64 mg/g,总黄酮含量分别为41.11、40.67 mg/g,其次是酯键合态酚和糖苷键合态酚,不溶性结合态酚含量较低;两种牡丹花游离酚均含有17种成分,其主要成分是白藜芦醇、1,2,3,4,6-O-五没食子酰葡萄糖和大波斯菊苷;酯键合态酚、糖苷键合态酚中主要成分是山柰酚-7-O-β-D-葡萄糖苷和大波斯菊苷。不同形态酚类化合物中游离酚的抗氧化活性最强,丹凤、香玉牡丹花游离酚对1,1-二苯基-2-三硝基苯肼自由基、2,2′-联氮-二(3-乙基苯并噻唑-6-磺酸)阳离子自由基清除能力和铁离子还原能力分别为855.03、367.10、230.54μmol/g和499.06、290.64、196.39μmol/g;丹凤和香玉牡丹花的游离酚对α-葡萄糖苷酶抑制活性最强,半抑制浓度分别为12.15、13.87μg/mL。研究结果对丹凤和香玉多酚利用具有一定的参考价值。

Meis1和Cyclin D3在子宫内膜癌中的表达及临床意义

目的探讨粒细胞嗜酸性白血病整合位点1(Meis1)和细胞周期蛋白D3(Cyclin D3)在子宫内膜癌中的表达及临床意义。方法采用免疫组化的方法检测12例正常子宫内膜及45例子宫内膜样腺癌患者组织中的Meis1和Cyclin D3的蛋白阳性表达情况,分析它们之间的相关性。结果与正常子宫内膜相比,Meis1在子宫内膜样腺癌腺细胞中阳性表达率高,差异有统计学意义(P<0.05);Cyclin D3在子宫内膜样腺癌组中的表达高于正常子宫内膜组(P<0.05)(77.8%>33.3%);高、中分化腺癌组CyclinD3的阳性表达率高于低分化组及正常子宫内膜组,差异有统计学意义(P<0.05);Cyclin D3与Meis1的阳性表达率之间呈正相关(χ^(2)=0.296,P<0.05);Meis1和Cyclin D3阳性表达的子宫内膜癌患者生存时间短(P<0.05)。结论在子宫内膜样腺癌中,Meis1的表达阳性率升高,与Cyclin D3的表达存在相关。

Enzyme-digested Colla Corii Asini(E’jiao) prevents hydrogen peroxide-induced cell death and accelerates amyloid beta clearance in neuronal-like PC12 cells

As an aging-associated degenerative disease,Alzheimer’s disease is characterized by the deposition of amyloid beta(Aβ),oxidative stress,inflammation,dysfunction and loss of cholinergic neurons.Colla Corii Asini(CCA)is a traditional Chinese medicine which has been used for feebleness-related diseases and anti-aging.CCA might delay aging-induced degenerative changes in neurons.In the present study,we evaluated antioxidant activity,cytoprotective effects,and Aβremovability of enzyme-digested Colla Corii Asini(CCAD).Oxygen radical absorbance capacity(ORAC)activity assay showed that,as compared to gelatins from the skin of porcine,bovine and cold water fish,CCA exhibited the highest ORAC activity.The ORAC activity of CCA and CCAD was increased gradually by the length of time in storage.Ultrastructure analysis by scanning electron microscopy showed that among CCA manufactured in 2008,2013,2017 and gelatin from cold water fish skin,CCA manufactured in 2008 presented the smoothest surface structure.We further tested the protective effects of CCAD(manufactured in 2008)and enzyme-digested gelatin from cold water fish skin(FGD)on hydrogen peroxide(H2O2)-induced cell death in nerve growth factor-differentiated neuronal-like PC12 cells.Presto blue assay showed that both FGD and CCAD at 0.5 mg/m L increased cell viability in H2O2-treated neuronal-like PC12 cells.The protection of CCAD was significantly superior to that of FGD.Acetylcholinesterase(Ach E)assay showed that both FGD and CCAD inhibited Ach E activity in nerve growth factor-differentiated neuronal-like PC12 cells to 89.1%and 74.5%of that in non-treated cells,respectively.The data suggest that CCAD might be able to increase the neurotransmitter acetylcholine.Although CCAD inhibited Ach E activity in neuronal-like PC12 cells,CCAD prevented H2O2-induced abnormal deterioration of Ach E.ELISA and neprilysin activity assay results indicated that CCAD reduced amyloid beta accumulation and increased neprilysin activity in Aβ1–42-treated neuronal-like PC12 cells,suggesting that CCAD can enhance Aβclearance.Our results suggest that CCA might be useful for preventing and treating Alzheimer’s disease.

犬DEA1.1血型抗体间接ELISA检测方法的建立

为探求减少宠物临床中犬因血型错配发生的输血反应,本试验以DEA1.1阳性红细胞膜作为抗原建立能检测DEA1.1抗体的间接ELISA方法。试验以犬DEA1.1血型为主要研究对象,提取犬红细胞膜,以DEA1.1阳性红细胞膜作为抗原,用醛化技术包被抗原,优化间接ELISA反应条件。结果显示,最佳固定剂为浓度0.0625%和0.125%的戊二醛,最佳抗原包被量为4~8μg/孔,最佳封闭液为5%的脱脂奶粉,最佳温度为37℃,最适反应时间为90 min。与间接抗球蛋白试验相比,优化后的间接ELISA法有更高的灵敏性,本试验建立的间接ELISA方法可以对犬DEA1.1血型抗体进行高通量检测。

Response of arbuscular mycorrhizal fungi and phosphorus solubilizing bacteria to remediation abandoned solid waste of coal mine

Coal is the vital resource of energy in China,but abandoned coal ash and gangue lead to the degradation of vegetation cover and reduce soil quality.Both arbuscular mycorrhizal fungi (AMF) and phosphate solubilizing bacteria (PSB) play a key role in biogeochemical cycle such as soil organic matter decomposition,nutrition release,and energy flow.To improve and reclamation the soil quality and ecological efficiency of the coal mining waste,we investigated the effects of an AMF strain (Glomus mosseae) and a PSB strain (Pantoesstewarti) on phytate mineralization and subsequent transfer to the host plant (Medicago sativa L.) using a two-compartment microcosm with a central 30 mm nylon mesh barrier.The results showed that significantly higher available P (AP),above ground biomass (AGB) and underground biomass (UGB) were in combined inoculation of AMF-PSB than other treatments in root and hyphae compartment.The microbial inoculum of the AMF or PSB had a significant influence on soil acid phosphatase activities (ACP).AMF-PSB enhanced phytate mineralization,improved plant biomass.AP and ACP positively influenced the AGB and UGB.AMF-PSB could be used as bioinoculant to enhance sustainable production of the plant in abandoned solid waste of coal mine.

骨原发性朗格汉斯组织细胞增生症中Cyclin D1的表达及临床意义

目的探讨骨原发性朗格汉斯组织细胞增生症(Langerhans cell histiocytosis,LCH)中Cyclin D1的表达及临床意义。方法回顾性分析21例骨原发性LCH的临床病理学特征,利用免疫组化法检测Cyclin D1、BRAF、p-ERK蛋白的表达,采用Spearman相关分析研究三者之间的关系。采用χ^2检验比较LCH病例与对照组(朗格汉斯细胞微脓肿、皮肤苔藓样病变和皮肤色素沉积症)中Cyclin D1的表达差异。采用ROC曲线法分析不同临床病理参数与不良预后事件的关系。结果21例LCH均呈典型的组织形态学特征。LCH组与对照组中Cyclin D1阳性率分别为100%和3.6%,LCH组中Cyclin D1的表达显著高于对照组(P<0.001)。Spearman相关分析显示:Cyclin D1与BRAF、p-ERK的表达均无相关性,BRAF、p-ERK的表达亦无相关性(P>0.05)。ROC曲线分析发现:核分裂象、Ki-67、Cyclin D1、p-ERK对提示患者不良预后有一定的参考价值(AUC>0.5,P<0.05)。结论Cyclin D1对鉴别LCH和反应性朗格汉斯细胞增生是一个有效的标志物,并能够提示患者的不良预后,其弥漫一致的表达可能与MAPE/ERK通路激活有关。

Antler stem cells and their potential in wound healing and bone regeneration

Compared to other vertebrates,the regenerative capacity of appendages in mammals is very limited.Deer antlers are an exception and can fully regenerate annually in postnatal mammals.This process is initiated by the antler stem cells(AnSCs).AnSCs can be divided into three types:(1)Antlerogenic periosteum cells(for initial pedicle and first antler formation);(2)Pedicle periosteum cells(for annual antler regeneration);and(3)Reserve mesenchyme cells(RMCs)(for rapid antler growth).Previous studies have demonstrated that AnSCs express both classic mesenchymal stem cells(MSCs)and embryonic stem cells(ESCs),and are able to differentiate into multiple cell types in vitro.Thus,AnSCs were defined as MSCs,but with partial ESC attributes.Near-perfect generative wound healing can naturally occur in deer,and wound healing can be achieved by the direct injection of AnSCs or topical application of conditioned medium of AnSCs in rats.In addition,in rabbits,the use of both implants with AnSCs and cell-free preparations derived from AnSCs can stimulate osteogenesis and repair defects of bone.A more comprehensive understanding of AnSCs will lay the foundation for developing an effective clinical therapy for wound healing and bone repair.

Research Progress in Catalytic Cracking Reaction of Tetralin and Decalin

The integrated catalytic hydrogenation and catalytic cracking process has been gradually adopted by refineries to satisfy the requirements for manufacture of light and clean petroleum products. To explore the reaction laws of hydrogenated aromatics in hydrotreated oil, the catalytic cracking reaction laws of hydrogenated aromatics have been reviewed by taking tetralin and decalin as examples of different degrees of hydrogenated aromatics. Moreover, the reaction mechanism of tetralin and decalin has been analyzed emphatically. The effects of zeolite pore structure, acid properties and process parameters on reaction laws have been analyzed carefully. It is considered that the catalytic cracking performance of hydrogenated aromatics with different hydrogen saturation degrees is quite different. It is necessary to control the hydrogenation depth, optimize the hydrocarbon composition of catalytic cracking feed materials for maximizing the yield of target products.

一种10位高速Pipeline-SAR混合型ADC设计

基于180 nm CMOS工艺,设计了一种无残差放大的10位100 MS/s流水线与逐次逼近混合型ADC。采用两级流水线-逐次逼近混合型结构,第一级完成4位粗量化转换,第二级完成6位细量化转换。为了降低整体电路功耗,采用单调式电容控制切换方式,两级之间残差电压采用采样开关电荷共享方式实现。采用异步时序控制逻辑,进一步提升了能量利用率和转换速度。后仿真结果表明,在100 MS/s奈奎斯特采样率下,有效位数为9.39 bit,信噪失真比为58.34 dB,1.8 V电源电压下整体功耗为5.9 mW。

Stem cell therapy for central nerve system injuries: glial cells hold the key

Mammalian adult central nerve system （CNS） injuries are devastating because of the intrinsic difficulties for effective neuronal regeneration. The greatest problem to be overcome for CNS recovery is the poor regeneration of neurons and myelin-forming cells, oligodendrocytes. Endogenous neural progenitors and transplanted exogenous neuronal stem cells can be the source for neuronal regeneration. However, because of the harsh local microenvironment, they usually have very low efficacy for functional neural regeneration which cannot compensate for the loss of neurons and oligodendrocytes. Glial cells （including astrocytes, microglia, oligodendrocytes and NG2 glia） are the majority of cells in CNS that provide support and protection for neurons. Inside the local microenvironment, glial cells largely influence local and transplanted neural stem cells survival and fates. This review critically analyzes current finding of the roles of glial cells in CNS regeneration, and highlights strategies for regulating glial cells＇ behavior to create a permissive microenvironment for neuronal stem cells.

颌骨骨内动静脉畸形介入栓塞治疗远期疗效分析

目的 :探讨通过介入栓塞方式治疗颌骨骨内动静脉畸形的有效性和安全性。方法 :回顾分析就诊于上海交通大学医学院附属第九人民医院的颌骨骨内动静脉畸形患者9例,在DSA引导下予以介入栓塞治疗,通过DSA观察病变范围、预测硬化剂注射剂量以使药物注射入病变腔内,并对患者疗效、不良反应和并发症进行长期随访观察。结果:9例患者中,男6例(66.7%),女3例(33.3%);年龄7~51岁,平均21.3岁。出血是患者最主要的报告症状(6例,66.7%);供血动脉包括下牙槽动脉、面动脉以及上颌动脉分支。9例患者均于全麻下接受介入栓塞治疗,共治疗20次(每例患者接受1~5次,平均2.2次/例)。无水乙醇单次平均用量为21.95 mL。20次介入栓塞治疗中,9次应用弹簧圈辅助无水乙醇栓塞治疗,共使用158枚弹簧圈,平均17.6枚/次(80枚/9次)。另有2次使用博来霉素,5次使用少量150μm PVA颗粒辅助栓塞治疗。9例患者随访时间5~11年,其中,4例治愈,3例基本治愈,2例好转,治疗有效率为100%。结论:在颌骨骨内动静脉畸形治疗中,根据临床及影像学表现正确诊断、根据DSA造影结果采用以无水乙醇为主介入栓塞方案,可减少创伤、改善症状、控制病灶,获得相对满意的治疗效果,该方案安全、有效。

Cyclin D3在子宫内膜癌组织中的表达及其意义

目的探讨细胞周期蛋白D3(Cyclin D3)在不同子宫内膜组织中的表达及其意义。方法采用免疫组织化学检测12例正常子宫内膜组织、13例单纯型子宫增生内膜及45例子宫内膜癌(EMC)组织中Cyclin D3蛋白的表达情况,分析Cyclin D3蛋白阳性表达率与临床病理特征和雌激素受体(ER)及孕激素受体(PR)间的关系。结果与正常子宫内膜组织相比,Cyclin D3在EMC的阳性表达率增高(78%vs.33%,P<0.05)。在45例EMC组织中,有脏器转移者的Cyclin D3阳性表达率较高(P<0.05);但Cyclin D3与病理分化级别、临床分期、肌层浸润深度、淋巴结转移均无关(P均>0.05),且Cyclin D3的阳性表达率与ER和PR的阳性表达率均无关(P均>0.05)。结论Cyclin D3的过表达可能参与了EMC的发生和转移。

Establishment of a rhesus monkey model of middle cerebral artery ischemia and reperfusion using a microcatheter embolization method

Nonhuman primates are closest to humans in terms of lineage, and middle cerebral artery ischemia/reperfusion responses of nonhuman primates are most similar to ischemic stroke in humans. Therefore, nonhuman primates could be utilized to simulate the process of ischemic stroke in the human. Few studies, however, have reported the use of endovascular technology to establish a rhesus monkey stroke model. In the present study, seven adult, male, rhesus monkeys were selected and, following anesthesia, a microcatheter was inserted into one side of the middle cerebral artery via the femoral artery to block blood flow, thereby resulting in middle cerebral artery occlusion. After 2 hours, the microcatheter was withdrawn to restore the middle cerebral artery blood flow and to establish ischemia/reperfusion. Results from angiography and magnetic resonance angiography confirmed occlusion and reopening of the middle cerebral artery. Magnetic resonance imaging revealed the existence of ischemic brain lesions, and neurological examination showed sustained functional deficits following surgery. The rhesus monkey middle cerebral artery ischemia/reperfusion models established by microcatheter embolization had the advantage of non-craniotomy invasion and reproducibility. The scope and degree of ischemic damage using this model was controllable. Therefore, this nonhuman primate model is an ideal model for cerebral ischemia and reperfusion.

Ni(OH)_2-Ni/C for hydrogen oxidation reaction in alkaline media

The development of the hydrogen electrode is vital for the application of alkaline polymer electrolyte fuel cells(APEFCs).In this study,a series of Ni(OH)_2 decorated Ni/C catalysts(Ni(OH)_2-Ni/C) were prepared by a three-step electrochemical treatment of Ni/C.The existence of Ni(OH)_2 was demonstrated by X-ray photoelectron spectroscopy(XPS),and the surface molar ratio of Ni(OH)_2/Ni of the samples was estimated via an electrochemical method.The HOR catalytic activity of the catalysts was evaluated by a rotation disk electrode(RDE) method,and a "volcano plot" was established between the HOR exchange current(j0) and the surface molar ratio of Ni(OH)_2/Ni.On top of the "volcano",the surface molar ratio of Ni(OH)_2/Ni is1.1:1,the j0 of which was 6.8 times of that of Ni/C.The stability of the samples toward HOR was evaluated to be good.Our study added a systematic experimental evidence to the HOR research,showing that the HOR catalytic activity of Ni can be deliberately controlled via decoration of Ni(OH)_2,which may help understanding the HOR mechanism on Ni.