维普中文期刊产品整合服务
103篇 您的检索式:作者名="Haochen"
    题名 作者 年代 出处 被引量
1Liver biopsy in evaluation of complications following liver transplantation显示文摘AIM: To analyze the role of liver biopsies in differential diagnosis after liver transplantation. METHODS: A total of 50 biopsies from 27 patients with liver dysfunction out of 52 liver transplantation cases were included. Biopsies were obtained 0-330 d after operation, in which, 44 were fine needle biopsies, another 6 were wedge biopsies during surgery. All tissues were stained with haemotoxylin-eosin. Histochemical or immunohistochemical stain was done. RESULTS: The rate of acute rejection in detected cases and total transplantation cases was 48.2% and 25.0%, chronic rejection rate in detected cases and total transplantation cases was 14.8% and 7.7%, preservation-repeffusion injury in detected cases and total transplantation cases was 25.9% and 13.5%, hepatic artery thrombosis rate in detected cases and total transplantation cases was 11.1% and 5.8%, intrahepatic biliary injury rate in detected cases and total transplantation cases was 7.4 % and 3.8%, CMV infection rate in detected cases and total transplantation cases was 3.7% and 1.9%, hepatitis B recurrence rate in detected cases and total transplantation cases was 3.7% and 1.9%, the ratio of suspicious drug-induced hepatic injury in detected cases and total transplantation cases was 11.1% and 5.8%. CONCLUSION: Acute rejection and preservation-reperfusion injury are the major factors in early liver dysfunction after liver transplantation. Hepatic artery thrombosis and prolonged cold preservation may result in intrahepatic biliary injury. Acute rejection and viral infection may involve in the pathogenesis of chronic rejection. Since there are no specific lesions in drug-induced hepatic injury, the diagnosis must dosely combine clinical history and rule out other possible complications.Ying-YanYu JunJi Guang-WenZhou Bai-YongShen HaoChen 3i-QiYan Cheng-HongPeng Hong-WeiLi 2004World Journal of Gastroenterology2004,10,11:12
2A Model Output Machine Learning Method for Grid Temperature Forecasts in the Beijing Area显示文摘In this paper, the model output machine learning (MOML) method is proposed for simulating weather consultation, which can improve the forecast results of numerical weather prediction (NWP). During weather consultation, the forecasters obtain the final results by combining the observations with the NWP results and giving opinions based on their experience. It is obvious that using a suitable post-processing algorithm for simulating weather consultation is an interesting and important topic. MOML is a post-processing method based on machine learning, which matches NWP forecasts against observations through a regression function. By adopting different feature engineering of datasets and training periods, the observational and model data can be processed into the corresponding training set and test set. The MOML regression function uses an existing machine learning algorithm with the processed dataset to revise the output of NWP models combined with the observations, so as to improve the results of weather forecasts. To test the new approach for grid temperature forecasts, the 2-m surface air temperature in the Beijing area from the ECMWF model is used. MOML with different feature engineering is compared against the ECMWF model and modified model output statistics (MOS) method. MOML shows a better numerical performance than the ECMWF model and MOS, especially for winter. The results of MOML with a linear algorithm, running training period, and dataset using spatial interpolation ideas, are better than others when the forecast time is within a few days. The results of MOML with the Random Forest algorithm, year-round training period, and dataset containing surrounding gridpoint information, are better when the forecast time is longer.Haochen LI Chen YU Jiangjiang XIA Yingchun WANG Jiang ZHU Pingwen ZHANG 2019Advances in Atmospheric Sciences2019,36,10:9
3Review of low timing jitter mode-locked fiber lasers and applications in dual-comb absolute distance measurement显示文摘Passively mode-locked fiber lasers emit femtosecond pulse trains with excellent short-term stability. The quantum-limited timing jitter of a free running femtosecond erbium-doped fiber laser working at room temperature is considerably below one femtosecond at high Fourier frequency. The ultrashort pulse train with ultralow timing jitter enables absolute time-of-flight measurements based on a dual-comb implementation, which is typically composed of a pair of optical frequency combs generated by femtosecond lasers. Dead-zone-free absolute distance measurement with sub-micrometer precision and kHz update rate has been routinely achieved with a dual-comb configuration, which is promising for a number of precision manufacturing applications, from large step-structure measurements prevalent in microelectronic profilometry to three coordinate measurements in large-scale aerospace manufacturing and shipbuilding. In this paper, we first review the sub-femtosecond precision timing jitter characterization methods and approaches for ultralow timing jitter mode-locked fiber laser design. Then, we provide an overview of the state-of-the-art dual-comb absolute ranging technology in terms of working principles, experimental implementations, and measurement precisions. Finally, we discuss the impact of quantum-limited timing jitter on the dual-comb ranging precision at a high update rate. The route to highprecision dual-comb range finder design based on ultralow jitter femtosecond fiber lasers is proposed.Haosen Shi Youjian Song Runmin Li Yuepeng Li Hui Cao Haochen Tian Bowen Liu Lu Chai Minglie Hu 2018Nanotechnology and Precision Engineering2018,1,4:9
4Machine Learning−based Weather Support for the 2022 Winter Olympics显示文摘1.A key support for the 2022 Winter Olympics The XXIV Olympic Winter Games are scheduled to take place from 4 to 22 February 2022,followed by the Paralympic Games from 4 to 13 March,in Beijing and towns in the neighboring Hebei Province,China.Weather plays an extremely important role in the outcome of the games(Chen et al.,2018).It can not only cause a difference between a medal or not,but affect the safety of athletes.Success of the Winter Olympics will greatly depend on weather conditions at the outdoor competition venues,dealing with many weather elements including the snow surface temperature,apparent temperature,gust wind speed,snow,visibility,etc.To ensure that the scheduled games go smoothly,it is imperative to have hourly or even every 10-minutely forecasts as well as updated weather-related risk assessments at the venues for the next 240 hours.So far,the Beijing/Hebei Meteorological Observatory has already started intelligent weather forecasting at 3-km resolution based on the results of numerical weather prediction(NWP)models.However,these experiments have suggested that the current forecasting techniques are incapable of capturing the complex mountain weather variations around some venues.The forecasting capability of NWP is constrained partly by limited knowledge of the local weather mechanisms.Jiangjiang XIA Haochen LI Yanyan KANG Chen YU Lei JI Lve WU Xiao LOU Guangxiang ZHU Zaiwen Wang Zhongwei YAN Lizhi WANG Jiang ZHU Pingwen ZHANG Min CHEN Yingxin ZHANG Lihao GAO Jiarui HAN 2020Advances in Atmospheric Sciences2020,37,9:6
5Relationship between the downregulation of HLA class Ⅰ antigen and clinicopathological significance in gastric cancer显示文摘AIM: To discuss the expression of human leukocyte antigen (HLA) class I antigens in gastric cancer and correlate these with pathologic type and TNM stage.METHODS: The expression of HLA class I antigen was detected by immunohistochemistry in 185 specimens of gastric cancer, 20 gastric cancer specimens with lymphatic metastasis and 22 controls of normal gastric mucosa using four monoclonal antibodies.RESULTS: The expression of HLA class I antigen (B/C locus) was significantly downregulated in gastric cancer and in lymphatic metastasis than that in normal gastricmucosa (x2 = 7.712, P<0.05). The expression of other HLA class I antigens was also downregulated, but the change was slight. There was no relationship betweenthe downregulation of HLA class I antigen and that ofβ2m and LMP2. The expression of HLA class I (B/C locus) was statistically correlated with pathologic stage in gastric adenocarcinoma (x2= 4.164, P<0.05).CONCLUSION: The expression of HLA class I antigen (B/Clocus) was obviously downregulated in gastric cancer andin lymphatic metastasis. This abnormal expression wouldprovide the tumor cells with a way to avoid immunologicalrecognition.Yu-QingShen Jian-QiongZhang Feng-QingMiao Jian-MinZhang QinJiang HaoChen Xiang-NianShan WeiXie 2005World Journal of Gastroenterology2005,11,23:6
6Protective effect of doxorubicin induced heat shock protein 72 on cold preservation injury of rat livers显示文摘AIM: To observe the protective effect of heat shock protein 72 (HSP 72) induced by pretreatment of doxorubicin (DXR) on long-term cold preservation injury of rat livers.METHODS: Sprague-Dawley rats were administered intravenously DXR at a dose of 1 mg/kg body mass in DXR group and saline in control group. After 48 h, the rat liver was perfused with cold Linger's and University of Wisconsin (UW) solutions and then was preserved in UW solution at 4℃ for 24, 36 and 48 h. AST, ALT, LDH and hyaluronic acid in preservative solution were determined. Routine HE,immunohistochemical staining for HSP 72 and electron microscopic examination of hepatic tissues were performed.RESULTS: After 24, 36 and 48 h, the levels of AST, ALT and hyaluronic acid in preservative solution were significantly higher in control group than in DXR group (P<0.05), while LDH level was not significantly different between the 2 groups (P>0.05). Hepatic tissues in DXR group were morphologically normal and significantly injured in control group. HSP 72 was expressed in hepatocytes and sinusoidal endothelial cells in DXR group but not in control group.CONCLUSION: Pretreatment of DXR may extend the time of rat liver cold preservation and keep liver alive. The expression of HSP 72 in liver can prevent hepatocytes and sinusoidal endothelial cells from long-term cold preservation injury.HaoChen Ying-YanYu Ming-JunZhang Xia-XingDeng Wei-PingYang JunJi Cheng-HongPeng Hong-WeiLi 2004World Journal of Gastroenterology2004,10,9:5
7Novel MSX1 variants identified in families with nonsyndromic oligodontia显示文摘The goal of this study was to identify MSX1 gene variants in multiple Chinese families with nonsyndromic oligodontia and analyse the functional influence of these variants.Whole-exome sequencing(WES)and Sanger sequencing were performed to identify the causal gene variants in five families with nonsyndromic oligodontia,and a series of bioinformatics databases were used for variant confirmation and functional prediction.Phenotypic characterization of the members of these families was described,and an in vitro analysis was performed for functional evaluation.Five novel MSX1 heterozygous variants were identified:three missense variants[c.662A>C(p.Q221P),c.670C>T(p.R224C),and c.809C>T(p.S270L)],one nonsense variant[c.364G>T(p.G122*)],and one frameshift variant[c.277delG(p.A93Rfs*67)].Preliminary in vitro studies demonstrated that the subcellular localization of MSX1 was abnormal with the p.Q221P,p.R224C,p.G122*,and p.A93Rfs*67 variants compared to the wild type.Three variants(p.Q221P,p.G122*,and p.A93Rfs*67)were classified as pathogenic or likely pathogenic,while p.S270L and p.R224C were of uncertain significance in the current data.Moreover,we summarized and analysed the MSX1-related tooth agenesis positions and found that the type and variant locus were not related to the severity of tooth loss.Our results expand the variant spectrum of nonsyndromic oligodontia and provide valuable information for genetic counselling.Jinglei Zheng Miao Yu Haochen Liu Tao Cai Hailan Feng Yang Liu Dong Han 2021International Journal of Oral Science2021,13,1:4
8Approach to General Data Model of GIS Symbol Library and Symbol Library Data Exchange XML Schema显示文摘标志描绘是 GIS 的重要功能。在不同 GIS 平台分享符号的信息为 GIS 应用程序和用户是必要的。这篇论文讨论必要性,可能性和在不同 GIS 平台分享一个标志图书馆的答案技术。线路地图如下被设计:首先,为标志图书馆当模特儿建立一个一般数据,然后格式化设计标准交换,并且最后格式化号召 GIS 制造商为标准交换为他们的标志图书馆提供交换工具。这篇论文分析 GIS 符号的图书馆的一般特征,给一个标志图书馆模型和 XML 的一篇草稿标志图书馆交换格式的纲要。LI Qingyuan SU Deguo LI Hongsheng LIU Haochen SUN Lijian 2009Geo-Spatial Information Science2009,12,4:4
9Mode transition induced by back-breakdown of the gliding arc and its influence factors显示文摘Gliding arc is a mostly used non-equilibrium plasma generation method whose characteristic is affected by the backbreakdown phenomenon.Mode transition induced by back-breakdown of the gliding arc is studied in this work and effects of gas flow rate,applied voltage,electrode parameters on mode transition were studied.Experimental results show that there are two typical modes during the development of the gliding arc.Mode A comprises periodicitical development of the arc from the minimum gap breakdown to the longest extinguishment,while the arc in mode B continues to produce a back-breakdown at the ends of the electrodes.As the flow rate descends,the gliding arc gradually changes from mode A to B.It is the decrease of the arc velocity caused by lower flow rate leads to the occurrence of back-breakdown,which generates mode B.Smaller electrode opening angle,shorter length and wider minimum gap reduce the gliding speed,so that arc is more likely to enter mode B.As the applied voltage is increased,enhancing of the electric field strength on the breakdown path of the back-breakdown and thickening of the arc's diameter allow the gliding arc to enter mode B at a higher arc speed.Ruobing Zhang Haochen Huang Tianshu Yang 2020High Voltage2020,5,3:3
10Progress on the ultrasonic testing and laser thermography techniques for NDT of tokamak plasma-facing components显示文摘During manufacturing and operation, different kinds of defects, e.g., delamination or surface cracks, may be generated in the plasma-facing components (PFCs) of a Tokamak device. To ensure the safety of the PFCs, various kinds of nondestructive testing (NDT) techniques are needed for different defect and failure mode. This paper gives a review of the recently developed ultrasonic testing (UT) and laser thermography methods for inspection of the delamination and surface cracks in PFCs. For monoblock W/Cu PFCs of divertor, the bonding quality at both W-Cu and Cu- CuCrZr interfaces was qualified by using UT with a focus probe during manufacturing. A noncontact, coupling-free and flexible ultrasonic scanning testing system with use of an electromagnetic acoustic transducer and a robotic inspection manipulator was introduced then for the in-vessel inspection of delamination defect in first wall (FW). A laser infrared thermography testing method is highlighted for the on-line inspection of delamination defect in FW through the vacuum vessel window of the Tokamak reactor. Finally, a new laser spot thermography method using laser spot array source was described for the online inspection of the surface cracks in FW.Cuixiang Pei Haochen Liu Jinxing Qiu Tianhao Liu Zhenmao Chen 2019Theoretical & Applied Mechanics Letters2019,9,3:3
11A 10×10 deep ultraviolet light-emitting micro-LED array显示文摘In this work,we design and fabricate a deep ultraviolet(DUV)light-emitting array consisting of 10×10 micro-LEDs(μ-LEDs)with each device having 20μm in diameter.Strikingly,the array demonstrates a significant enhancement of total light output power by nearly 52%at the injection current of 100 mA,in comparison to a conventional large LED chip whose emitting area is the same as the array.A much higher(~22%)peak external quantum efficiency,as well as a smaller efficiency droop forμ-LED array,was also achieved.The numerical calculation reveals that the performance boost can be attributed to the higher light extraction efficiency at the edge of eachμ-LED.Additionally,the far-field pattern measurement shows that theμ-LED array possesses a better forward directionality of emission.These findings shed light on the enhancement of the DUV LEDs performance and provide new insights in controlling the light behavior of theμ-LEDs.Huabin Yu Muhammad Hunain Memon Hongfeng Jia Haochen Zhang Meng Tian Shi Fang Danhao Wang Yang Kang Shudan Xiao Shibing Long Haiding Sun 2022Journal of Semiconductors2022,43,6:3
12Phylogenetic positions of some genera and species of the family Buccinidae (Gastropoda: Mollusca) from China based on ribosomal RNA and COI sequences显示文摘A phylogenetic analysis of members of the family Buccinidae was conducted using 18S rRNA gene, 28S rRNA gene and the mitochondrial cytochrome oxidase Ⅰ gene. We studied 18 species of Buccinidae that belong to eight different genera and inhabit the China coastal seas. We analyzed the patterns of divergence between an outgroup and basal ingroup taxa, the monophyly of the genus Neptunea, and the position of one unnamed species within the Buccinidae. A phylogenetic tree (neighbor-joining (NJ) method) was reconstructed based on the sequences of 18S rRNA, 28S rRNA and COI, with Rapana venosa as outgroup. The NJ tree indicated that the 18 species could be divided into five groups. The genus Buccinum was monophyletic, whereas Neptunea was shown to be paraphyletic since it included Siphonalia subdilatata and Neptunea sp., a new species. This novel species otherwise clustered consistently with Neptunea cumingi in three other phylogenetic trees, showing a low genetic distance and divergence percentage of sequences belonging to the genus Neptunea. A smaller genetic distance and a smaller difference of 18S rRNA, 28S rRNA and COI sequences between Neptunea cumingii and Neptunea arthritica cumingii confirmed them to be the same species.HOU Lin DAHMS Hans-Uwe DONG ChangYong CHEN YiFei HOU HaoChen YANG WanXi ZOU XiangYang 2013Chinese Science Bulletin2013,58,19:3
13Sodium tungsten bronze(Na_(x)WO_(3))-doped near-infrared-shielding bulk glasses for energy-saving applications显示文摘Tungsten bronze coatings and films have attracted global attention for their applications in near-infrared(NIR)-shielding windows.However,they are unstable in strong ultraviolet,humid heat,alkaline and/or oxidizing environments and are difficult to be coated on glass surfaces with complex shape.Here,we address these limitations by doping sodium tungsten bronze(Na_(x)WO_(3))into bulk glasses using a simple glass melting method.X-ray diffraction,Raman spectroscopy,X-ray photoelectron spectroscopy,TEM and SEM-EDS characterization confirmed the presence of sodium tungsten bronze(Na_(x)WO_(3))functional units inside the 34SiO_(2)-38B_(2)O_(3)-28NaF glass matrix.Because the functional units are well protected by the glass matrix,the fabricated glasses are stable under hot,humid,oxidizing conditions,as well as under ambient conditions,with no change after 360 days.The NIR-shielding performance of these glasses can be adjusted to as high as 100%by varying WO_(x)concentration(2-8 mol%)and quenching temperature(1000-1400℃).With a content of 6 mol%WO_(x)and a quenching temperature of 1000℃,the bulk glass shows 63%transmission of visible light and only 11%transmission of NIR light at 1100 nm.Thermal insulation experiments show that the NIR-shielding performance of the glasses are far superior to commercial soda lime window glass or indium-doped tin oxide(ITO)glass,and comparable to cesium tungsten bronze coated glass.The novel bulk glasses have higher stability,simpler processing,and can be easily made into complex shapes,making them excellent alternative materials for energy-saving glasses.Guang Yang Yunhang Qi Daming Hu Haochen Wang Hongfei Chen Liangmiao Zhang Chuanxiang Cao Bin Liu Fang Xia Yanfeng Gao 2021Journal of Materials Science & Technology2021,,30:3
14N-doped-carbon coated Ni2P-Ni sheets anchored on graphene with superior energy storage behavior显示文摘Transition metal phosphides (TMPs) have been widely studied as electrode materials for supercapacitors and lithium-ion batteries due to their high electrochemical reacti on activities. The practical applicati on of TMPs was gen erally hampered by their low con ductivity and large volume changes during electrochemical reactions. In this work, nitrogen-doped-carbon (NC) coated Ni2P-Ni hybrid sheets were fabricated and loaded into highly con ductive graphe ne n etwork, forming a Ni2P ?Ni@NC@G composite. The highly con ductive g raphe ne, the NC coati ng layer, and the decorated Ni nano particles in combi nation offer continu ous electro n tran sport cha nnels in the composite, resulti ng with facilitated electrode reaction kinetics and superior rate performance. Besides, the flexible graphene sheets and well-decorated Ni particles among Ni2P can effectively buffer the harmful stress during electrochemical reactions to maintain an integrated electrode structure. With these favorable features, the composite dem on strated superior capacitive and lithium storage behavior. As an electrode material for supercapacitors, the composite shows a remarkable capacitance of 2,335.5 F·g^-1 at 1 A·g^-1 and high capacitance retention of 86.4% after 2,000 cycles. Asymmetrical supercapacitors (ASCs) were also prepared with remarkable energy density of 53.125 Whk·g^-1 and power density of 3,750 Whk·g^-1. As an anode for lithium ion batteries, a high reversible capacity of 1,410 mAh·g^-1 can be delivered at 0.2 A·g^-1 after 200 cycles. Promising high rate capability was also demonstrated with a high discharge capacity of 750 mAh·g^-1 at 8 A·g^-1. This work shall pave the way for the production of other TMP materials for energy storage systems.Yuanxing Zhang Li Sun Liqi Bai Haochen Si Yu Zhang Yihe Zhang 2019Nano Research2019,12,3:3
15Efficacy of rigosertib, a small molecular RAS signaling disrupter for the treatment of KRAS-mutant colorectal cancer显示文摘Objective:Mutant KRAS,the principal isoform of RAS,plays a pivotal role in the oncogenesis of colorectal cancer by constitutively activating the RAF/MEK/ERK and PI3K/AKT pathways.Effective targeted therapies are urgently needed.We investigated whether rigosertib,a benzyl styryl sulfone RAS signaling disruptor,could selectively kill KRAS-mutant colorectal cancer cells.Methods:CCK-8 was used to determine the cell viability.Patient-derived tumor and cancer cell xenograft models were used to detect the inhibitory efficacy of rigosertib.Flow cytometry was used to evaluate the apoptosis and cell cycle progression.Apoptosis and cell cycle arrest markers were detected by Western blot.DCFH-DA was used to determine the reactive oxygen species.Immunohistochemistry staining and Western blot were performed to characterize RAS signaling markers in colorectal cancer tissues and cells.Results:Rigosertib(RGS)exhibited a cytotoxic effect against colorectal cancer cells,which was greater in KRAS-mutant cells.Furthermore,RGS induced mitotic arrest and oxidative stress-dependent apoptosis in KRAS-mutant DLD1 and HCT116 cells.Besides,RGS disrupted RAS signaling,and the inhibition of RAS/MEK/ERK was independent of cellular oxidative stress.Using patient-derived xenograft models,the response and tumor inhibition of RGS were significantly higher in the KRAS-mutant subgroup,while p-MEK,p-ERK,and p-AKT levels of RGS-treated tumors were significantly decreased.Finally,in a KRAS-mutant,chemotherapy-resistant patient-derived xenograft model,RGS showed a stronger therapeutic effect than the combination standard therapy involving fluoropyrimidine+oxaliplatin/irinotecan+bevacizumab.Conclusions:These data showed that targeting RAS signaling using RGS could be a therapeutic treatment for KRAS-mutant colorectal cancer patients.Xinyi Zhou Qian Xiao Dongliang Fu Haochen Zhang Yang Tang Jinjie He Yeting Hu Xiangxing Kong Fei Teng Xiangrui Liu Ying Yuan Kefeng Ding 2022Cancer Biology & Medicine2022,19,2:2
16Improved peroxidase-mimic property: Sustainable, high- efficiency interfacial catalysis with H2O2 on the surface of vesicles of hexavanadate-organic hybrid surfactants显示文摘Kun Chen Aruuhan Bayaguud Hui Li Yang Chu Haochen Zhang Hongli Jia Baofang Zhang Zicheng Xiao Pingfan Wu Tianbo Liu Yongge wei 2018Nano Research2018,11,3:2
17Hippo-YAP/TAZ signaling in osteogenesis and macrophage polarization:Therapeutic implications in bone defect repair显示文摘Bone defects caused by diseases or surgery are a common clinical problem.Researchers are devoted to finding biological mechanisms that accelerate bone defect repair,which is a complex and continuous process controlled by many factors.As members of transcriptional costimulatory molecules,Yes-associated protein(YAP)and transcriptional co-activator with PDZ-binding motif(TAZ)play an important regulatory role in osteogenesis,and they affect cell function by regulating the expression of osteogenic genes in osteogenesis-related cells.Macrophages are an important group of cells whose function is regulated by YAP/TAZ.Currently,the relationship between YAP/TAZ and macrophage polarization has attracted increasing attention.In bone tissue,YAP/TAZ can realize diverse osteogenic regulation by mediating macrophage polarization.Macrophages polarize into M1 and M2 phenotypes under different stimuli.M1 macrophages dominate the inflammatory response by releasing a number of inflammatory mediators in the early phase of bone defect repair,while massive aggregation of M2 macrophages is beneficial for inflammation resolution and tissue repair,as they secrete many anti-inflammatory and osteogenesis-related cytokines.The mechanism of YAP/TAZ-mediated macrophage polarization during osteogenesis warrants further study and it is likely to be a promising strategy for bone defect repair.In this article,we review the effect of Hippo-YAP/TAZ signaling and macrophage polarization on bone defect repair,and highlight the regulation of macrophage polarization by YAP/TAZ.Haochen Wang Hui Yu Tianyu Huang Bin Wang Lin Xiang 2023Genes & Diseases2023,10,6:2
18A reactive oxygen species-responsive hydrogel encapsulated with bone marrow derived stem cells promotes repair and regeneration of spinal cord injury显示文摘Spinal cord injury(SCI)is an overwhelming and incurable disabling event accompanied by complicated inflammation-related pathological processes,such as excessive reactive oxygen species(ROS)produced by the infiltrated inflammatory immune cells and released to the extracellular microenvironment,leading to the widespread apoptosis of the neuron cells,glial and oligodendroctyes.In this study,a thioketal-containing and ROS-scavenging hydrogel was prepared for encapsulation of the bone marrow derived mesenchymal stem cells(BMSCs),which promoted the neurogenesis and axon regeneration by scavenging the overproduced ROS and re-building a regenerative microenvironment.The hydrogel could effectively encapsulate BMSCs,and played a remarkable neuroprotective role in vivo by reducing the production of endogenous ROS,attenuating ROS-mediated oxidative damage and downregulating the inflammatory cytokines such as interleukin-1 beta(IL-1β),interleukin-6(IL-6)and tumor necrosis factor-alpha(TNF-α),resulting in a reduced cell apoptosis in the spinal cord tissue.The BMSCs-encapsulated ROS-scavenging hydrogel also reduced the scar formation,and improved the neurogenesis of the spinal cord tissue,and thus distinctly enhanced the motor functional recovery of SCI rats.Our work provides a combinational strategy against ROS-mediated oxidative stress,with potential applications not only in SCI,but also in other central nervous system diseases with similar pathological conditions.Ziming Li Tengfei Zhao Jie Ding Haochen Gu Qiaoxuan Wang Yifan Wang Deteng Zhang Changyou Gao 2023Bioactive Materials2023,,1:2
19Optimization Scheme of Large Passenger Flow in Huoying Station,Line 13 of Beijing Subway System显示文摘This paper focuses on the distribution of passenger flow in Huoying Station,Line 13 of Beijing subway system.The transformation measures taken by Line 13 since operation are firstly summarized.Then the authors elaborate the facilities and equipment of this station,especially the node layout and passenger flow field.An optimization scheme is proposed to rapidly distribute the passenger flow in Huoying Station by adjusting the operation time of the escalator in the direction of Xizhimen.The authors adopt Queuing theory and Anylogic simulation software to simulate the original and the optimized schemes of Huoying Station to distribute the passenger flow.The results of the simulation indicate that the optimized scheme could effectively alleviate the traffic congestion in the hall of Huoying Station,and the pedestrian density in other places of the hall is lowered;passengers could move freely in the hall and no new congestion points would form.The rationality of the scheme is thus proved.Jin Zhou Haochen Wang Di Sun Siqiang Xu Meng Lv Feifei Yu 2020Computers, Materials & Continua2020,,6:2
20Combined immunotherapy with dendritic cells and cytokine-induced killer cells for malignant tumors: A systematic review and meta-analysis显示文摘Ran Chen Xin Deng Haochen Wu Peichun Peng Bin Wen Fuyin Li Fenfen Li 2014International Immunopharmacology2014,,2:2
返回顶部 每页显示:
共6页 首页 上一页 第1页 下一页 末页 /6 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费