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156篇 您的检索式:作者名="Cong Ding"
    题名 作者 年代 出处 被引量
1Progress in electrical energy storage system:A critical review显示文摘Electrical energy storage technologies for stationary applications are reviewed. Particular attention is paid to pumped hydroelectric storage, compressed air energy storage, battery, flow battery, fuel cell, solar fuel, superconducting magnetic energy storage, flywheel, capacitor/supercapacitor, and thermal energy storage. Comparison is made among these technologies in terms of technical characteris- tics, applications and deployment status.Haisheng Chen Thang Ngoc Cong Wei Yang Chunqing Tan Yongliang Li Yulong Ding 2009Progress in Natural Science:Materials International2009,19,3:205
2Optimization of phenol degradation by Candida tropicalis Z-04 using Plackett-Burman design and response surface methodology显示文摘Statistical experimental designs were used to optimize the process of phenol degradation by Candida tropicalis Z-04,isolated from phenol-degrading aerobic granules.The most important factors influencing phenol degradation (p<0.05),as identified by a two-level Plackett-Burman design with 11 variables,were yeast extract,phenol,inoculum size,and temperature.Steepest ascent method was undertaken to determine the optimal regions of these four significant factors.Central composite design (CCD) and response surface analysis were adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum phenol degradation.The analysis results indicated that interactions between yeast extract and temperature,phenol and temperature,inoculum size and temperature affected the response variable (phenol degradation) significantly.The predicted results showed that the maximum removal efficiency of phenol (99.10%) could be obtained under the optimum conditions of yeast extract 0.41 g/L,phenol 1.03 g/L,inoculum size 1.43% (V/V) and temperature 30.04°C.These predicted values were further verified by validation experiments.The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy.This study indicated the excellent ability of C.tropicalis Z-04 in degrading high-strength phenol.Optimal conditions obtained in this experiment laid a solid foundation for further use of this microorganism in the treatment of highstrength phenol effluents.Jiangya Zhou Xiaojuan Yu Cong Ding Zhiping Wang Qianqian Zhou Hao Pao Weimin Ca 2011Journal of Environmental Sciences2011,23,1:48
3Lithium, an anti-psychotic drug, greatly enhances the generation of induced pluripotent stem cells显示文摘体的房间能由定义因素是进导致的 pluripotent 干细胞(iPSCs ) 的 reprogrammed。reprogramming 的低效率和 oncogenes 和病毒的向量的 genomic 集成限制了 iPSCs 的潜在的申请。这里,我们报导那锂(李) ,药过去常对待心情混乱,极大地从老鼠提高 iPSC 产生胚胎的成纤维细胞和人的脐的静脉 endothelial 房间。李与(Oct4 ) 或二个因素(OS 或好) 便于 iPSC 产生。支持 reprogramming 上的李的效果仅仅部分取决于它的主要目标 GSK3β。不同于另外的 GSK3β禁止者,李不仅增加 Nanog 的表示,而且提高 Nanog 的 transcriptional 活动。我们也发现李由经由 LSD1 的 downregulation 支持 epigenetic 修正施加它的效果, H3K4 特定的 histone demethylase。将 LSD1 击倒部分在提高 reprogramming 模仿李的效果。我们的结果不仅提供一个直接方法改进 iPSC 产生效率,而且为体的房间 reprogramming 作为一个批评调节的人识别了 histone demethylase。Quan Wang Xinxiu Xu Jun Li Jing Liu Haifeng Gu Ru Zhang Jiekai Chen Yin Kuang Jian Fei Cong Jiang Ping Wang Duanqing Pei Sheng Ding Xin Xie 2011Cell Research2011,21,10:23
4Sex- and region- specific alterations of basal amino acid and monoamine metabolism in the brain of aquaporin -4 knockout mice显示文摘Yi Fan Jing Zhang Xiu - Lan Sun Lin Gao Xiao - Ning Zeng Jian - Hua Ding Cong Cao Ling Niu Gang Hu 2005中国药理通讯2005,22,4:14
5Polycyclic aromatic hydrocarbon biodegradation and extracellular enzyme secretion in agitated and stationary cultures of Phanerochaete chrysosporium显示文摘多不的芳族烃的胞外酶分泌物和简历降级(哼) 被学习在鼓动并且 Phanerochaete chrysosporium 的浅静止液体培养。Veratryl 酒精和 Tween80 作为木质素过氧化物酶(嘴唇) 和锰过氧化物酶(MnP ) 被加到文化 inducer 分别地。浅静止文化对酶的生产合适,而鼓动的文化由便于分裂期间团转移提高了全面简历降级哼进水的阶段。一个嘴唇激发器的使用, veratryl 酒精,增加没哼降级但是显著地提高的嘴唇活动。相反, Tween80 增加了两 MnP 分泌物并且哼在浅静止文化的降级。在另一方面,高哼降级当可检测的嘴唇和 MnP 活动不在时在鼓动的文化被观察。结果与 PAH 降级有关直接建议细胞外的过氧化物酶活动不在提升是重要的,并且增加的溶解度而非酶活动可以是更多哼降级。DING Juan CONG Jun ZHOU juan GAO Shixiang 2008Journal of Environmental Sciences2008,20,1:14
6Ginsenoside Rg1 Attenuates Isoflurane-induced Caspase-3 Activation via Inhibiting Mitochondrial Dysfunction显示文摘Objective The inhalation anesthetic isoflurane has been shown to induce mitochondrial dysfunction and caspase activation, which may lead to learning and memory impairment. Ginsenoside Rg1 is reported to be neuroprotective. We therefore set out to determine whether ginsenoside Rg1 can attenuate isoflurane-induced caspase activation via inhibiting mitochondrial dysfunction. Methods We investigated the effects of ginsenoside Rg1 at concentrations of 12.5, 25, and 50 μmol/L and pretreatment times of 12 h and 24 h on isoflurane-induced caspase-3 activation in H4 na?ve and stably transfected H4 human neuroglioma cells that express full-length human amyloid precursor protein(APP)(H4-APP cells). For mitochondrial dysfunction, we assessed mitochondrial permeability transition pore(m PTP) and adenosine-5'-triphosphate(ATP) levels. We employed Western blot analysis, chemiluminescence, and flowcytometry. Results Here we show that pretreatment with 50 μmol/L ginsenoside Rg1 for 12 h attenuated isoflurane-induced caspase-3 activation and mitochondrial dysfunction in H4-APP cells, while pretreatment with 25 and 50 μmol/L ginsenoside Rg1 for 24 h attenuated isoflurane-induced caspase-3 activation and mitochondrial dysfunction in both H4 na?ve and H4-APP cells. Conclusion These data suggest that ginsenoside Rg1 may ameliorate isoflurane-induced caspase-3 activation by inhibiting mitochondrial dysfunction. Pending further studies, these findings might recommend the use of ginsenoside Rg1 in preventing and treating isoflurane-induced neurotoxicity.MIAO Hui Hui ZHEN Yu DING Guan Nan HONG Fang Xiao XIE Zhong Cong TIAN Ming 2015Biomedical and Environmental Sciences2015,28,2:9
7Mucinous colorectal adenocarcinoma:clinical pathology and treatment options显示文摘Mucinous colorectal adenocarcinoma is a distinct subtype of colorectal cancer(CRC)characterized by the pres-ence of abundant extracellular mucin which accounts for at least 50%of the tumor volume.Mucinous colorectal adenocarcinoma is found in 10%-20%of CRC patients and occurs more commonly in female and younger patients.Moreover,mucinous colorectal adenocarcinoma is more frequently located in the proximal colon and diagnosed at an advanced stage.Based on its molecular context,mucinous colorectal adenocarcinoma is associated with the over-expression of mucin 2(MUC2)and mucin 5AC(MUC5AC)proteins.At the same time,it shows higher mutation rates in the fundamental genes of the RAS/MAPK and PI3K/Akt/mTOR pathways.Mucinous colorectal adenocarcinoma also shows higher rates of microsatellite instability(MSI)than non-mucinous colorectal adenocarcinoma which might correlate it with Lynch syndrome and the CpG island methylator phenotype.The prognosis of mucinous colorectal adenocarcinoma as to non-mucinous colorectal adenocarcinoma is debatable.Further,the impaired responses of mucinous colorectal adenocarcinoma to palliative or adjuvant chemotherapy warrant more studies to be performed for a specialized treatment for these patients.In this review,we discuss the molecular background and histopathol-ogy of mucinous colorectal adenocarcinoma,and provide an update on its prognosis and therapeutics from recent literatures.Cong Luo Shuyi Cen Guojun Ding Wei Wu 2019Cancer Communications2019,39,1:8
8A cohort autopsy study defines COVID-19 systemic pathogenesis显示文摘Severe COVID-19 disease caused by SARS-CoV-2 is frequently accompanied by dysfunction of the lungs and extrapulmonary organs.However,the organotropism of SARS-CoV-2 and the port of virus entry for systemic dissemination remain largely unknown.We profiled 26 COVID-19 autopsy cases from four cohorts in Wuhan,China,and determined the systemic distribution of SARS-CoV-2.Xiao-Hong Yao Tao Luo Yu Shi Zhi-Cheng He Rui Tang Pei-Pei Zhang Jun Cai Xiang-Dong Zhou Dong-Po Jiang Xiao-Chun Fei Xue-Quan Huang Lei Zhao Heng Zhang Hai-Bo Wu Yong Ren Zhen-Hua Liu Hua-Rong Zhang Cong Chen Wen-Juan Fu Heng Li Xin-Yi Xia Rong Chen Yan Wang Xin-Dong Liu Chang-Lin Yin Ze-Xuan Yan Juan Wang Rui Jing Tai-Sheng Li Wei-Qin Li Chao-Fu Wang Yan-Qing Ding Qing Mao Ding-Yu Zhang Shu-Yang Zhang Yi-Fang Ping Xiu-Wu Bian 2021Cell Research2021,31,8:7
9Microstructure and strength features of warm and ice-rich frozen soil treated with high-performance cements显示文摘Warm and ice-rich frozen soil(WIRFS) exhibits lower shear strength due to the weak binding forces between soil particles and ice crystals. To enhance the strength of WIRFS, frozen soil was treated separately with Portland, Phosphate, Sulphoaluminate, Portland-Phosphate and PortlandSulphoaluminate cements. After the samples were cured under -1.0°C for 7 days, the microscopic pore distribution characteristics and the macro-mechanical properties of WIRFS were investigated using mercury intrusion porosimetry(MIP), scanning electron microscopy(SEM) and unconfined compressive strength(UCS) tests. To quantitatively analyze the laws of pore-size transformation and the variation of Hausdorff volumetric fractal dimensions for pre-and post-treated WIRFS, the CURVEEXTRACT and Image-Pro Plus(IPP) image analysis system has been developed for analysing SEM images of the soil samples. Statistics of the pore-area dimension and pore-volume dimension were calculated. The results reveal that the cement-based treatment of WIRFS can improve the cementation fill of soil pores and the bond forces between soil particles. There is an evident correlation between the microstructure characteristics and the mechanical properties of the treated WIRFS. As the fractal dimensions of pore-area decrease, the unconfined compressive strength of cement-treated WIRFS increases significantly. In contrast, as the fractal dimensions of pore-volume increases, the unconfined compressive strength decreases remarkably.SUN Gao-chen ZHANG Jian-ming DANG Ying-sheng DING Cong 2019Journal of Mountain Science2019,16,6:7
10Milling Force Model for Aviation Aluminum Alloy: Academic Insight and Perspective Analysis显示文摘Aluminum alloy is the main structural material of aircraft,launch vehicle,spaceship,and space station and is processed by milling.However,tool wear and vibration are the bottlenecks in the milling process of aviation aluminum alloy.The machining accuracy and surface quality of aluminum alloy milling depend on the cutting parameters,material mechanical properties,machine tools,and other parameters.In particular,milling force is the crucial factor to determine material removal and workpiece surface integrity.However,establishing the prediction model of milling force is important and difficult because milling force is the result of multiparameter coupling of process system.The research progress of cutting force model is reviewed from three modeling methods:empirical model,finite element simulation,and instantaneous milling force model.The problems of cutting force modeling are also determined.In view of these problems,the future work direction is proposed in the following four aspects:(1)high-speed milling is adopted for the thin-walled structure of large aviation with large cutting depth,which easily produces high residual stress.The residual stress should be analyzed under this particular condition.(2)Multiple factors(e.g.,eccentric swing milling parameters,lubrication conditions,tools,tool and workpiece deformation,and size effect)should be considered comprehensively when modeling instantaneous milling forces,especially for micro milling and complex surface machining.(3)The database of milling force model,including the corresponding workpiece materials,working condition,cutting tools(geometric figures and coatings),and other parameters,should be established.(4)The effect of chatter on the prediction accuracy of milling force cannot be ignored in thin-walled workpiece milling.(5)The cutting force of aviation aluminum alloy milling under the condition of minimum quantity lubrication(mql)and nanofluid mql should be predicted.Zhenjing Duan Changhe Li Wenfeng Ding Yanbin Zhang Min Yang Teng Gao Huajun Cao Xuefeng Xu Dazhong Wang Cong Mao Hao Nan Li Gupta Munish Kumar Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali 2021Chinese Journal of Mechanical Engineering2021,34,1:7
11Rarefaction and Temperature Gradient Effect on the Performance of the Knudsen Pump显示文摘The prediction of the multiscale flow in the Knudsen pump is important for understanding its pumping mechanism.However,there is little research on such interesting multiscale phenomenon in the Knudsen pumps.In this paper,a novel numerical analysis method combining the direct simulation Monte Carlo(DSMC) method with the smoothed particle hydrodynamics(SPH) method is presented for simulating the multiscale flow,which is often encountered in the application of the Knudsen pumps.Validity and accuracy of the new method are given by comparing its results with that of the previous research.Using the coupled multiscale approach,the rarefaction and the temperature drive are studied,which are two main factors on the performance of the Knudsen pumps.To investigate the effect of rarefaction on the performance of the Knudsen pump,various pump operation pressures are compared.The flow characteristics and pumping ability at different rarefaction are analyzed,and the phenomenon of the multiscale flow is also discussed.Several cases with different linear or nonlinear temperature gradients are set to investigate the effect of temperature gradient on the performance of the Knudsen pump.The flow characteristics of the Knudsen pump such as the velocity,pressure increase,and the mass flowrate are presented.A unique phenomenon,the reverse transpiration effect caused by the nonlinear temperature gradient is studied,and the reason of the significant pressure increase in the pump channel is also analyzed.Since the multiscale gas flow is widely encountered in the microflow systems,the above method and its results can also be greatly beneficial and provide significant insights for the design of the MEMS devices.YE Jianjun YANG Jian ZHENG Jinyang DING Xianting WONG Ieong LI Weizhong CHEN Cong 2012Chinese Journal of Mechanical Engineering2012,25,4:6
12Two-in-one:A pooled analysis of primary hepatic neuroendocrine carcinoma combine d/collide d with hepatocellular carcinoma显示文摘To the Editor:Primary hepatic neuroendocrine carcinoma(PHNEC)combined/collided with hepatocellular carcinoma(HCC)is a rare and intriguing disease with characteristics of two histologically different cancers.Usually,a combined type refers to the cases in which hepatic neuroendocrine carcinoma(HNEC)and HCC components intermingle with each other and cannot be clearly separated in the transitional areas,while a collision type refers to those in which the two distinct cancers occurred simultaneously and independently.Sometimes it is difficult to readily distinguish these two types.We searched PubMed,Medline,China Science Periodical Database,and VIP Database with the publication from January 1980 to January 2019,using the keywords(“hepatic neuroendocrine carcinoma”or“HNEC”)and(“hepatocellular carcinoma”or“HCC”).After manually excluding records on secondary HNEC and other types of liver cancer,a total of 28 cases in 24 reports[1–24]were identified and summarized in Table 1.Jia-Xi Mao Fei Teng Ke-Yan Sun Cong Liu Guo-Shan Ding Wen-Yuan Guo 2020Hepatobiliary & Pancreatic Diseases International2020,19,4:6
13Two case reports and literature review for hepatic epithelioid angiomyolipoma: Pitfall of misdiagnosis显示文摘BACKGROUND Hepatic epithelioid angiomyolipoma(HEAML) is a rare liver disease and is easily misdiagnosed. Enhanced recognition of HEAML is beneficial to the differential diagnosis of rare liver diseases.CASE SUMMARY We presented two cases of HEAML in Changzheng Hospital, Naval Medical University, and then collected and analyzed all reports about HEAML recorded in PubMed, MEDLINE, China Science Periodical Database, and VIP database from January 2000 to March 2018. A total of 409 cases of HEAML in 97 reports were collected, with a ratio of men to women of 1:4.84 and an age range from 12 years to 80 years(median 44 years). Among the patients with clinical symptoms mentioned, 61.93%(205/331) were asymptomatic, 34.74%(115/331) showed upper or right upper quadrant abdomen discomfort, while a few of them showed abdominal mass, gastrointestinal symptoms, low fever, or weight loss. The misdiagnosis rate of HEAML was as high as 40.34%(165/409) due to its nonspecific imaging findings. Most of the tumors were solitary and round in morphology, with clear boundaries. Ultrasound scan indicated low echo with internal nonuniformity and rich blood supply in most cases. Computer tomography/magnetic resonance imaging enhanced scan showed varied characteristics. The ratio of fast wash-in and fast wash-out, fast wash-in and slow wash-out, and delayed enhancement was roughly 4:5:1. A definite diagnosis of HEAML depended on the pathological findings of the epithelioid cells in lesions and the expression of human melanoma black 45, smooth muscle actin,melanoma antigen, and actin by immunohistochemical staining. HEAML had a relatively low malignant rate of 3.91%. However, surgical resection was the main treatment for HEAML, due to the difficulty diagnosing before operation.CONCLUSION HEAML is a rare and easily misdiagnosed disease, and it should be diagnosed carefully, taking into account clinical course, imaging, pathological,and immunohistochemical findings.Jia-Xi Mao Fei Teng Cong Liu Hang Yuan Ke-Yan Sun You Zou Jia-Yong Dong Jun-Song Ji Jun-Feng Dong Hong Fu Guo-Shan Ding Wen-Yuan Guo 2019World Journal of Clinical Cases2019,7,8:6
14Acute and Chronic Changes and Predictive Value of Tpeak-Tend lor Ventricular Arrhythmia Risk in Cardiac Resynchronization Therapy Patients显示文摘Cong Xue Wei Hua Chi Cai Li-Gang Ding Zhi-Min Liu Xiao-Han Fan Yun-Zi Zhao Shu Zhang 2016Chinese Medical Journal2016,,18:6
15Enhanced mechanical properties and flame retardancy of short jute fiber/poly(lactic acid)composites with phosphorus-based compound显示文摘In this work, a phosphorous-based compound(DOPO-ICN) was obtained by a two-step process. 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO) reacted with formaldehyde firstly, followed with reacting with 1,6-hexane diisocyanate(HDI). The chemical structure of DOPO-ICN was confirmed by Fourier transform infrared spectroscopy(FTIR) and 1 H NMR.The influence of DOPO-ICN on the mechanical and flammability properties of jute/PLA composites was studied. Compared to DOPO, DOPO-ICN improved the tensile, flexural and impact strength of the flame retardant jute/PLA composites. Moreover,the flammability of jute/PLA composites with different DOPO and DOPO-MA loading was investigated by thermogravimetric analysis(TGA), UL 94 test and limiting oxygen index(LOI) measurements. The results showed that DOPO-ICN imparted the flame retardancy to the jute/PLA composites.YU Tao DING Ding SHENG Cong TUERHONGJIANG Tuerdi LI Yan 2017Science China(Technological Sciences)2017,60,11:5
16Microwave ablation of primary breast cancer inhibits metastatic progression in model mice via activation of natural killer cells显示文摘Surgery is essential for controlling the symptoms and complications of stage IV breast cancer.However,locoregional treatment of primary tumors often results in distant progression,including lung metastasis,the most common type of visceral metastasis.As a minimally invasive thermal therapy,microwave ablation(MWA)has been attempted in the treatment of breast cancer,but the innate immune response after MWA has not yet been reported.Using two murine models of stage IV breast cancer,we found that MWA of primary breast cancer inhibited the progression of lung metastasis and improved survival.NK cells were activated after MWA of the primary tumor and exhibited enhanced cytotoxic functions,and the cytotoxic pathways of NK cells were activated.Depletion experiments showed that NK cells but not CD4+or CD8+T cells played a pivotal role in prolonging survival.Then,we found that compared with surgery or control treatment,MWA of the primary tumor induced completely different NK-cell-related cytokine profiles.Macrophages were activated after MWA of the primary tumor and produced IL-15 that activated NK cells to inhibit the progression of metastasis.In addition,MWA of human breast cancer stimulated an autologous NK-cell response.These results demonstrate that MWA of the primary tumor in metastatic breast cancer inhibits metastatic progression via the macrophage/IL-15/NK-cell axis.MWA of the primary tumor may be a promising treatment strategy for de novo stage IV breast cancer,although further substantiation is essential for clinical testing.Muxin Yu Hong Pan Nan Che Li Li Cong Wang Yue Wang Ge Ma Mengjia Qian Jiawei Liu Mingjie Zheng Hui Xie Lijun Ling Yi Zhao Xiaoxiang Guan Qiang Ding Wenbin Zhou Shui Wang 2021Cellular & Molecular Immunology2021,18,9:5
17Nano-enhanced biolubricant in sustainable manufacturing:From processability to mechanisms显示文摘To eliminate the negative effect of traditional metal-working fluids and achieve sustainable manufacturing,the usage of nano-enhanced biolubricant(NEBL)is widely researched in minimum quantify lubrication(MQL)machining.It's improved tool wear and surface integrity have been preliminarily verified by experimental studies.The previous review papers also concluded the major influencing factors of processability including nano-enhancer and lubricant types,NEBL concentration,micro droplet size,and so on.Nevertheless,the complex action of NEBL,from preparation,atomization,infiltration to heat transfer and anti-friction,is indistinct which limits preparation of process specifications and popularity in factories.Especially in the complex machining process,in-depth understanding is difficult and meaningful.To fll this gap,this paper concentrates on the comprehensive quantitative assessment of processability based on tribological,thermal,and machined surface quality aspects for NEBL application in turning,milling,and grinding.Then it attempts to answer mechanisms systematically considering multi-factor influence of molecular structure,physicochemical properties,concentration,and dispersion.Firstly,this paper reveals advanced lubrication and heat transfer mechanisms of NEBL by quantitative comparison with biolubricant-based MQL machining.Secondly,the distinctive filmformation,atomization,and infiltration mechanisms of NEBL,as distinguished from metal-working fluid,are clarified combining with its unique molecular structure and physical properties.Furtherly,the process optimization strategy is concluded based on the synergistic relationship analysis among process variables,physicochemical properties,machining mechanisms,and performance of NEBL.Finally,the future development directions are put forward aiming at current performance limitations of NEBL,which requires improvement on preparation and jet methods respects.This paper will help scientists deeply understand effective mechanism,formulate process specifications,and find future development trend of this technology.Yanbin ZHANG Hao Nan LI Changhe LI Chuanzhen HUANG Hafiz Muhammad ALI Xuefeng XU Cong MAO Wenfeng DING Xin CUI Min YANG Tianbiao YU Muhammad JAMIL Munish Kumar GUPTA Dongzhou JIA Zafar SAID 2022Friction2022,10,6:5
18Electron-beam radiation effects on the structure and properties of polypropylene at low dose rates显示文摘While the high-energy radiation effects on polypropylene, which are crucial for the cable industry for nuclear power plants, have been thoroughly studied, the property changes of PP at low-dose-rate electron-beam irradiation are far from elucidated. Herein, the influence of electron-beam irradiation on the structure and properties of PP was examined. The static EB irradiation conditions were 1.2 MeV at a low dose rate of 20 kGy/h to achieve absorbed doses ranging from 45, to 60, 100, and 200 kGy.The molecular structure was first evaluated by measuring the carboxyl index and the relative radical concentrations via Fourier transform infrared spectroscopy and electron spin resonance, respectively. Mechanical, differential scanning colorimetric, and rheological tests were carried out to further investigate the changes in the properties(tensile, crystalizing, and viscoelastic properties) of irradiated PP, which showed good agreement with the structural analysis results. We found that radio-oxidative degradation(chain scission) was predominant, which can be due to the low dose rate facilitating oxygen diffusion into the PP matrix during electron-beam irradiation.Heng-Ti Wang Hai-Qing Jiang Rong-Fang Shen Xiao-Jun Ding Cong Zhang Lin-Fan Li Jing-Ye Li 2018Nuclear Science and Techniques2018,29,6:5
19β-arrestin 2 is essential for fluoxetine-mediated promotion of hippocampal neurogenesis in a mouse model of depression显示文摘Over the last decade, the roles of β-arrestins in the treatment of neuropsychological diseases have become increasingly appreciated. Fluoxetine is the first selective serotonin reuptake inhibitor developed and is approved for the clinical treatment of depression. Emerging evidence suggests that fluoxetine can directly combine with the 5-HT receptor, which is a member of the G protein-coupled receptor (GPCR) family, in addition to suppressing the serotonin transporter. In this study, we prepared a chronic mild stress (CMS)-induced depression model with β-arrestin2−/− mice and cultured adult neural stem cells (ANSCs) to investigate the involvement of the 5-HT receptor-β-arrestin axis in the pathogenesis of depression and in the therapeutic effect of fluoxetine. We found that β-arrestin2 deletion abolished the fluoxetine-mediated improvement in depression-like behaviors and monoamine neurotransmitter levels, although β-arrestin2 knockout did not aggravate CMS-induced changes in mouse behaviors and neurotransmitters. Notably, the β-arrestin2−/− mice had a shortened dendritic length and reduced dendritic spine density, as well as decreased neural precursor cells, compared to the WT mice under both basal and CMS conditions. We further found that β-arrestin2 knockout decreased the number of proliferating cells in the hippocampal dentate gyrus and suppressed the proliferative capability of ANSCs in vitro. Moreover, β-arrestin2 knockout aggravated the impairment of cell proliferation induced by corticosterone and further blocked the fluoxetine-mediated promotion of mouse hippocampal neurogenesis. Mechanistically, we found that the 5-HT2BR-β-arrestin2-PI3K/Akt axis is essential to maintain the modulation of hippocampal neurogenesis in depressed mice. Our study may provide a promising target for the development of new antidepressant drugs.Chen-xin Li Ying Zheng Hong Zhu Cheng-wu Li Zhang He Cong Wang Jian-hua Ding Gang Hu Ming Lu 2021Acta Pharmacologica Sinica2021,42,5:4
20Predictors of super-response to cardiac resynchronization therapy: the significance of heart failure medication, pre-implant left ventricular geometry and high percentage of biventricular pacing显示文摘BackgroundSuper 应答者(SR ) 被定义为在心脏的再同步治疗(CRT ) 以后显示出关键心脏的功能改进的病人。这研究的目的是在 CRT.MethodsThis 学习注册了从 2010 ~ 2014 在时期期间经历了 CRT 的 201 个病人以后,识别并且验证 SR 的预言者。临床并且 echocardiographic 评估在 CRT 和 6 个月前被进行在以后。有在纽约心协会(NYHA ) 的减少的病人功能的班 1,在左室的结束收缩的体积(LVESV ) 的减少 15% ,并且最后的左室的喷射部分(LVEF ) 当经历了 CRT 的 201 个病人的 SRs.Results29% 作为 SR 被识别, 45% 被分类。在基线, SR 有显著地更小的左 atrial 直径(男孩) , LVESV,左室的结束心脏舒张的体积(LVEDV ) 和比 non-super-responders (non-SRs ) 的更高的 LVEF。用变换血管收缩素的酶禁止者或血管收缩素受体 blockers (ACEI/ARB ) 的病人的百分比比 non-SRs 在 SR 是更高的。大多数 SR 有 Biventricular (BiV ) 在 CRT 以后在比 98% 六个月大的百分比上踱步。在 multivariate 逻辑回归分析, SR 的独立预言者是更低的 LVEDV [奇怪的比率(或) :0.93;信心间隔(CI ) :0.90-0.97 ] , ACEI/ARB 的使用(或:0.33;CI:0.13-0.82 ) 并且比 98% 大的 BiV 踱步百分比(或:0.29;CI:0.16-0.87 ) 有 ACEI/ARB 和更少 ectatic 的更好的依从的 .ConclusionPatients 在 CRT 前的室的几何学趋于有成为 SR 的更大的可能性。BiV 踱步的更高的百分比为成为 SR 是必要的。Han JIN Min GU Wei HUA Xiao-Han FAN Hong-Xia NIU Li-Gang DING Jing WANG Cong XUE Shu ZHANG 2017Journal of Geriatric Cardiology2017,14,12:4
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