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71篇 您的检索式:作者名="Dongdong ZHOU"
    题名 作者 年代 出处 被引量
1Comprehensive eco-environmental effects of the shelter-forest ecological engineering along the Tarim Desert Highway显示文摘In this work, we report a comprehensive study about the eco-environmental effects of the shelter forest along the Tarim Desert Highway, including the effects on aeolian environment, soil, micro-climate, biodiversity, and groundwater. The results show that: (1) The movement of windblown sand near the ground surface was affected by the shelter forest. The wind speed and sediment transport rate in the shelter forest decreased by 64%―80% and 87.45%―99.02%, respectively. In addition, there were also significant changes in the sand flux structure, the sand grain size, and the deflation and deposition on the ground surface. (2) Compared to the natural mobile sand, the soil bulk density in the forest area decreased while the total salt content, the total porosity, and the water content increased. In addition, the soil fertility was significantly improved in the forest area, and showed the 'first rapid, then slow' variation pattern. (3) The shelter forest showed positive effects on the micro-climate. Within the 6 m height above the ground, the air temperature in the shelter forest at different heights was lower than that in the mobile sand, while the air humidity was higher, while, the soil temperature was also lower in the shelter forest than mobile sand. (4) The number of soil microbial species increased significantly with the improvement of habitat in the shelterbelt. However, the population of different species was not distributed evenly across the surveyed area. (5) Currently, no significant effects of groundwater-pumping and forest-irrigation water have been found on the groundwater level and its salinity. The variation amplitude of both groundwater level and salinity was at the level of centimeters and 1g/L, respectively. No obvious variation trend has been observed.LEI JiaQiang LI ShengYu JIN ZhengZhong FAN JingLong WANG HaiFeng FAN DongDong ZHOU HongWei GU Feng QIU YongZhi XU Bo 2008Chinese Science Bulletin2008,53,S2:14
2TALEN-based generation of a cynomolgus monkey disease model for human microcephaly显示文摘基因在非人类的首领编辑可以为在人探索病原学和遗传上基于的神经病学的混乱的治疗学的策略导致珍贵模型。然而,仔细在人模仿病理学、行为的赤字的神经病学的混乱的一个猴子模型成功地还没被产生了。Microcephalin 1 (MCPH1 ) 在人的大脑,和智力迟钝伴随的 MCPH1 变化原因头小畸型的进化被含有。这里,我们产生了用抄写带 biallelic MCPH1 变化的一只 cynomolgus 猴子(Macaca fascicularis ) 像使活跃之物的受动器核酸酶。猴子概括了大多数在病人观察的重要临床的特征,包括在头圆周,早熟的染色体冷凝作用(PCC ) ,语料库 callosum 的发育不全和上面的手足 spasticity 的显著减小。而且,在变异的真皮的成纤维细胞的 MCPH1 的 overexpression 救了 PCC 症候群。这个猴子模型可以帮助我们阐明在人的头小畸型并且更好的致病的 MCPH1 的角色在首领大脑尺寸的进化理解这蛋白质的功能。Qiong Ke Weiqiang Li Xingqiang Lai Hong Chen Lihua Huang Zhuang Kang Kai Li Jie Ren Xiaofeng Lin Haiqing Zheng Weijun Huang Yunhan Ma Dongdong Xu Zheng Chen Xinming Song Xinyi Lin Min Zhuang Tao Wang Fengfeng Zhuang Jianzhong Xi Frank Fuxiang Mao Huimin Xia Bruce T Lahn Qi Zhou Shihua Yang Andy Peng Xiang 2016Cell Research2016,26,9:13
3Classification and regionalization of the forming environment of windblown sand disasters along the Tarim Desert Highway显示文摘Through the systematic field survey and observations, the factor quantification as well as setting the criteria, the sand disaster-forming environment along the Tarim Desert Highway can be divided into four grades by the classification and regionalization based on fuzzy mathematics. The length of the regions with significant sand disaster accounted for 37.1% of the total highway length. Particularly, the area along the Tarim Desert Highway, based on the sand disaster-forming environment classification as well as the difference in the five basic landform units along the highway, combined with the difference of wind regime, can be divided into five regions, in which the length of the regions suffering severe sand damage occupied 64.3% of the total highway length. In addition, the index of disaster formation grade along the highway decreased from north to south, showing a repeated spatial pattern in small length scales.LEI JiaQiang LI ShengYu FAN DongDong ZHOU HongWei GU Feng QIU YongZhi XU Bo LIU Shang DU WenYi YAN ZengHui WANG YongChang 2008Chinese Science Bulletin2008,53,S2:11
4ALDH2 contributes to melatonin-induced protection against APP/PS1 mutation-prompted cardiac anomalies through cGAS-STING-TBK1-mediated regulation of mitophagy显示文摘Ample clinical evidence suggests a high incidence of cardiovascular events in Alzheimer’s disease(AD),although neither precise etiology nor effective treatment is available.This study was designed to evaluate cardiac function in AD patients and APP/PS1 mutant mice,along with circulating levels of melatonin,mitochondrial aldehyde dehydrogenase(ALDH2)and autophagy.AD patients and APP/PS1 mice displayed cognitive and myocardial deficits,low levels of circulating melatonin,ALDH2 activity,and autophagy,ultrastructural,geometric(cardiac atrophy and interstitial fibrosis)and functional(reduced fractional shortening and cardiomyocyte contraction)anomalies,mitochondrial injury,cytosolic mtDNA buildup,apoptosis,and suppressed autophagy and mitophagy.APP/PS1 mutation downregulated cyclic GMP-AMP synthase(cGAS)and stimulator of interferon genes(STING)levels and TBK1 phosphorylation,while promoting Aβaccumulation.Treatment with melatonin overtly ameliorated unfavorable APP/PS1-induced changes in cardiac geometry and function,apoptosis,mitochondrial integrity,cytosolic mtDNA accumulation(using both immunocytochemistry and qPCR),mitophagy,and cGAS-STING-TBK1 signaling,although these benefits were absent in APP/PS1/ALDH2−/−mice.In vitro evidence indicated that melatonin attenuated APP/PS1-induced suppression of mitophagy and cardiomyocyte function,and the effect was negated by the nonselective melatonin receptor blocker luzindole,inhibitors or RNA interference of cGAS,STING,TBK1,and autophagy.Our data collectively established a correlation among cardiac dysfunction,low levels of melatonin,ALDH2 activity,and autophagy in AD patients,with compelling support in APP/PS1 mice,in which melatonin rescued myopathic changes by promoting cGAS-STING-TBK1 signaling and mitophagy via an ALDH2-dependent mechanism.Shuyi Wang Lin Wang Xing Qin Subat Turdi Dongdong Sun Bruce Culver Russel JReiter Xiaoming Wang Hao Zhou Jun Ren 2020Signal Transduction and Targeted Therapy2020,5,1:9
5From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries显示文摘Graphene nanosheets possess a promising potential as electrodes in Li-ion batteries (LIBs); consequently, the development of low-cost and high-productivity synthetic approaches is crudal. Herein, porous grapheneqike nanosheets (PGSs) have been synthesized from expandable graphite (EG) by initially intercalating phosphoric acid, and then performing annealing to enlarge the interlayer distance of EG, thus fadlitating the successive intercalation of zinc chloride. Subsequently, the following pyrolysis of zinc chloride in the EG interlayer promoted the formation of the porous PGS structure; meanwhile, the gas produced during the formation of the porous structure could exfoliate the EG to graphene-like nanosheets. The synthetic PGS material used as LIB anode exhibited superior Li+ storage performance, showing a remarkable discharge capacity of 830.4 mAh.g-1 at 100 mA.g-1, excellent rate capadty of 211.6 mAh'g-1 at 20,000 mA-g-1, and excellent cycle performance (near 100% capacity retention after 10,000 cycles). The excellent rate performance is attributed to the Li+ ion rapid transport in porous structures and the high electrical conductivity of graphene-like nanosheets. It is expected that PGS may be widely used as anode material for high-rate LIBs via this facile and low-cost route by employing EG as the raw material.Dongdong Zhao Lei Wang Peng Yu Lu Zhao Chungui Tian Wei Zhou LeiZhang Honggang Fu 2015Nano Research2015,8,9:8
6Mechanical Properties and Stress Strain Relationship Models for Bamboo Scrimber显示文摘In order to investigate the basic mechanical properties and stress strain relationship model for bamboo scrimber manufactured based on a new technique,a large quantities of experiments have been carried out.Based on the analysis of the test results,the following conclusions can be drawn.Two main typical failure modes were classified for bamboo scrimber specimens both under tension parallel to grain and tension perpendicular to grain.Brittle failure happened for all tensile tests.The slope values for the elastic stages have bigger discreteness compared with those for the specimens under tensile parallel to grain.The failure modes for bamboo scrimber specimens under compression parallel to grain could be divided into four.Only one main failure mode happened both for the bending specimens and the shear specimens.With the COV values of 28.64 and 25.72 respectively,the values for the strength and elastic modulus under tensile perpendicular to grain have the largest discreteness for bamboo scrimber.From the point of CHV values,the relationship among the mechanical parameters for bamboo scrimber were proposed based on the test results.Compared with other green building materials,bamboo scrimber manufactured based on a new technique has better mechanical performance and could be used in construction area.Three stress strain relationship models which are four-linear model,quadratic function model,and cubic function model were proposed for bamboo scrimber specimens manufactured based on a new technique.The latter two models gives better prediction for stress strain relationship in elastic plastic stage.Haitao Li Huizhong Zhang Zhenyu Qiu Jingwen Su Dongdong Wei Rodolfo Lorenzo Conggan Yuan Hongzheng Liu Chungui Zhou 2020Journal of Renewable Materials2020,8,1:7
7Osteoblast/fibroblast coculture derived bioactive ECM with unique matrisome profile facilitates bone regeneration显示文摘Extracellular matrix(ECM)with mimetic tissue niches was attractive to facilitate tissue regeneration in situ via recruitment of endogenous cells and stimulation of self-healing process.However,how to engineer the complicate tissue specific ECM with unique matrisome in vitro was a challenge of ECM-based biomaterials in tissue engineering and regenerative medicine.Here,we introduced coculture system to engineer bone mimetic ECM niche guided by cell-cell communication.In the cocultures,fibroblasts promoted osteogenic differentiation of osteoblasts via extracellular vesicles.The generated ECM(MN-ECM)displayed a unique appearance of morphology and biological components.The advantages of MN-ECM were demonstrated with promotion of multiple cellular behaviors(proliferation,adhesion and osteogenic mineralization)in vitro and bone regeneration in vivo.Moreover,proteomic analysis was used to clarify the molecular mechanism of MN-ECM,which revealed a specific matrisome signature.The present study provides a novel strategy to generate ECM with tissue mimetic niches via cell-cell communication in a coculture system,which forwards the development of tissue-bioactive ECM engineering along with deepening the understanding of ECM niches regulated by cells for bone tissue engineering.Mei Li Anqi Zhang Jiajing Li Jing Zhou Yanan Zheng Chi Zhang Dongdong Xia Haijiao Mao Jiyuan Zhao 2020Bioactive Materials2020,5,4:7
8The dynamic and thermodynamic processes dominating the reduction of global land monsoon precipitation driven by anthropogenic aerosols emission显示文摘Changes in monsoon precipitation have profound social and economic impacts as more than two-thirds of the world’s population lives in monsoon regions.Observations show a significant reduction in global land monsoon precipitation during the second half of the 20 th century.Understanding the cause of this change,especially possible anthropogenic origins,is important.Here,we compare observed changes in global land monsoon precipitation during 1948–2005 with those simulated by 5 global climate models participating in the Coupled Model Inter-comparison Project-phase 5(CMIP5)under different external forcings.We show that the observed drying trend is consistent with the model simulated response to anthropogenic forcing and to anthropogenic aerosol forcing in particular.We apply the optimal fingerprinting method to quantify anthropogenic influences on precipitation and find that anthropogenic aerosols may have contributed to 102%(62–144%for the 5–95%confidence interval)of the observed decrease in global land monsoon precipitation.A moisture budget analysis indicates that the reduction in precipitation results from reduced vertical moisture advection in response to aerosol forcing.Since much of the monsoon regions,such as India and China,have been experiencing rapid developments with increasing aerosol emissions in the past decedes,our results imply a further reduction in monsoon precipitation in these regions in the future if effective mitigations to reduce aerosol emissions are not deployed.The observed decline of aerosol emission in China since 2006 helps to alleviate the reducing trend of monsoon precipiptaion.Tianjun ZHOU Wenxia ZHANG Lixia ZHANG Xuebin ZHANG Yun QIAN Dongdong PENG Shuangmei MA Buwen DONG 2020Science China Earth Sciences2020,63,7:7
9Application and future perspective of CRISPR/Cas9 genome editing in fruit crops显示文摘Fruit crops, including apple, orange, grape,banana, strawberry, watermelon, kiwifruit and tomato, not only provide essential nutrients for human life but also contribute to the major agricultural output and economic growth of many countries and regions in the world. Recent advancements in genome editing provides an unprecedented opportunity for the genetic improvement of these agronomically important fruit crops. Here, we summarize recent reports of applying CRISPR/Cas9 to fruit crops,including efforts to reduce disease susceptibility, change plant architecture or flower morphology, improve fruit quality traits, and increase fruit yield. We discuss challenges facing fruit crops as well as new improvements and platforms that could be used to facilitate genome editing in fruit crops, including d Cas9-base-editing to introduce desirable alleles and heat treatment to increase editing efficiency. In addition, we highlight what we see as potentially revolutionary development ranging from transgene-free genome editing to de novo domestication of wild relatives. Without doubt, we now see only the beginning of what will eventually be possible with the use of the CRISPR/Cas9 toolkit. Efforts to communicate with the public and an emphasis on the manipulation of consumerfriendly traits will be critical to facilitate public acceptance of genetically engineered fruits with this new technology.Junhui Zhou Dongdong Li Guoming Wang Fuxi Wang Merixia Kunjal Dirk Joldersma Zhongchi Liu 2020Journal of Integrative Plant Biology2020,62,3:7
10Effects of substitution of Nd in a sand-cast Mg-2.5Nd-0.6Zn-0.5Zr alloy with x wt.% Sm(x=2.5, 4, and 6)显示文摘The microstructures and mechanical properties of a series of sand-cast Mg-Sm-Zn-Zr alloys under ascast, solution-treated and peak-aged states were thoroughly investigated. The OM, XRD, SEM and HRTEM were employed to characterize the microstructural evolution. The results indicate that substitution Nd in the conventional Mg-2.5 Nd-0.6 Zn-0.5 Zr alloy with different contents of Sm has comparative grain refinement effect and will fully change the dominant intermetallic phase. In addition, the substituted alloys perform clearly higher strength with comparative ductility at both as-cast and peakaged conditions and much greater aging hardening response than the referential alloy. It is obvious that the strength increments of this alloy are attributed to the changes of the eutectic intermetallic particles on grain boundaries.Deping Zhang Qiang Yang Dongdong Zhang Kai Guan Fanqiang Bu Hong Zhou Jian Meng 2017Journal of Rare Earths2017,35,12:5
11Interdecadal change of the connection between winter North Pacific Oscillation and summer precipitation in the Huaihe River valley显示文摘The relationship between the winter North Pacific Oscillation (NPO) and the following summer precipitation in the Huaihe River valley before and after the mid-1970s is investigated by using the Chinese 160-station precipitation data and NCEP/NCAR reanalysis data from 1951 to 2008.It is found that their linkage appears to have an apparent interdecadal variation.Before the mid-1970s, there was a prominent out-of-phase relationship between the winter NPO and the summer precipitation in the Huaihe River valley.However, such a relationship is significantly weakened afterwards.The change of atmospheric circulations related to the winter NPO before and after the mid-1970s is further addressed.Before the mid-1970s, a strong (weak) winter NPO was followed by the summer situations with anomalous low-level cyclonic (anticyclonic) circulation over the western Pacific and descending (ascending) over the Huaihe River valley.Meanwhile, the water vapor transporting to the Huaihe River valley was reduced (enhanced).These conditions are unfavorable (favorable) for the precipitation occurring in the Huaihe River valley, and thus the local precipitation was decreased (increased).After the mid-1970s, however, the impact of winter NPO on the summer atmospheric circulation system associated with the rainfall in the Huaihe River valley becomes diluted, thereby weakening its linkage to the summer precipitation in the Huaihe River valley.ZHOU BoTao XIA DongDong 2012Science China Earth Sciences2012,55,12:5
12In-situ Chemical Age of the Sandstone-hosted Uranium Deposit in Ningdong Area on the Western Margin of the Ordos Basin, North China显示文摘Objective The Ordos Basin located in the western part of the North China Craton bears various energy resources such as oil,gas,coal and uranium.It is one of the richest uranium-bearing basins in China.Since the discovery of the large-scale Dongsheng,Hangjinqi and Daying uranium deposits in the north of the Ordos Basin,aWANG Feifei LIU Chiyang NIU Haiqing ZHOU Ningchao LI Xiuhua LUO Wei ZHANG Dongdong ZHAO Yan 2018Acta Geologica Sinica(English Edition)2018,92,1:4
13Preparation of 5-fluorouracil-loaded chitosan nanoparticles and study of the sustained release in vitro and in vivo显示文摘The sustained-release properties of the biodegradable nano-drug delivery systems were used to improve the residence time of the chemotherapeutic agent in the body. These drug delivery systems were widely used to deliver chemotherapeutic drugs. The 5-fluorouracil loaded chitosan nanoparticles prepared in this paper have the above advantage. Here, we found that when the mass ratio of 5-fluorouracil and chitosan was 1:1, the maximum drug loading of nanoparticles was 20.13 ± 0.007%, the encapsulation efficiency was 44.28 ± 1.69%, the particle size was 283.9 ± 5.25 nm and the zeta potential was 45.3 ± 3.23 mV. The prepared nanoparticles had both burst-release and sustained-release phases in vitro release studies.In addition, the inhibitory effect of the prepared nanoparticles on gastric cancer SGC-7901 cells was similar to that of 5-fluorouracil injection, and the blank vector had no obvious inhibitory effect on SGC-7901 cells. In the pharmacokinetic study of rats in vivo, we found that AUC(0-t), MRT(0-t) and t1/2 z of nanoparticles were significantly increased in vivo compared with 5-fluorouracil solution, indicating that the prepared nanoparticles can play a role in sustained-release.Li Sun Yunna Chen Yali Zhou Dongdong Guo Yufan Fan Fangyan Guo Yufeng Zheng Weidong Chen 2017Asian Journal of Pharmaceutical Sciences2017,12,5:4
14Moisture Origins and Transport Processes for the 2020 Yangtze River Valley Record-Breaking Mei-yu Rainfall显示文摘The summer of 2020 recorded a record-breaking flood due to excessive mei-yu rain falling over the Yangtze River Valley(YRV).Using the Lagrangian model FLEXPART,this paper investigates moisture sources and transport processes behind this extreme event.Based on climate data from 1979 to 2019,the air-particle(an infinitesimally small air parcel)trajectories reaching the YRV show sectors that correspond to five main moisture sources:the Indian monsoon region(IND,27.5%of the total rainfall),the local evaporation(27.4%),the Western Pacific Ocean(WPO,21.3%),the Eurasian continent(8.5%)and Northeast Asia(4.4%).In the 2020 mei-yu season,moisture from all source regions was above normal except that from Northeast Asia.A record-breaking moisture source from the IND and WPO dominated this extreme mei-yu flood in 2020,which was 1.5 and 1.6 times greater than the climate mean,respectively.This study reveals a significant relationship between the moisture source with three moisture transport processes,i.e.,trajectory density,moisture content,and moisture uptake of air-particles.A broad anomalous anticyclonic circulation over the Indo-Northwestern Pacific(Indo-NWP)provides a favorable environment to enhance the moisture transport from the IND and WPO into the YRV.In the 2020 mei-yu season,a record-breaking Indo-NWP anomalous anticyclonic circulation contributed to a higher trajectory density as well as higher moisture content and moisture uptake of air-particles from the IND and WPO regions.This collectively resulted in unprecedented moisture transport from source origins,thus contributing to the mei-yu flood over the YRV in 2020.Lixia ZHANG Dan ZHAO Tianjun ZHOU Dongdong PENG Chan XIAO 2021Advances in Atmospheric Sciences2021,38,12:4
15A parameterization scheme for upward lightning in the cloud model and a discussion of the initial favorable environmental characteristics in the cloud显示文摘The upward lightning(UL) initiated from the top of tall buildings(at least above 100 m) is a type of atmospheric discharge. Currently, we understand the nature of the UL from ground observations, but the corresponding theoretical research is lacking. Based on an existing bidirectional leader stochastic model, a stochastic parameterization scheme for the UL has been built and embedded in an existing two-dimensional thundercloud charge/discharge model. The ULs simulated from the experiments with two-dimensional high resolution agree generally with the observation results. By analyzing the charge structure of thunderstorm clouds, we determined the in-cloud environmental characteristics that favor the initiation of conventional cloud-to-ground(CG) flashes and analyzed the differences and similarities of some characteristics of the positive and the negative UL. Simulation results indicate that the positive ULs are typically other-lightning-triggered ULs(OLTUL) and are usually a discharge phenomenon between the ground and the lower positive charge region appearing below the main middle negative charge region. The effect of the previous in-cloud lightning(IC) process of space electrical field provides favorable conditions for the initiation of a positive UL. Its entire discharge process is limited, and the branches of the leader are fewer in number as its discharge is not sufficient. A negative UL is generally a discharge phenomenon of the dipole charge structure between the ground and the main negative charge region. The lower temperature stratification and the sinking of the hydrometeors typically initiate a negative UL. Negative ULs develop strongly and have more branches. The OLTUL is initiated mainly during the development stage of a thunderstorm, while the self-triggered UL(STUL) is initiated mainly during the dissipation stage of a thunderstorm.TAN Yong Bo CHEN Chao ZHOU Jie Chen ZHOU Bo Wen ZHANG DongDong GUO XiuFeng 2016Science China Earth Sciences2016,59,7:3
16Conversion of D-glucose to L-lactate via pyruvate by an optimized cell-free enzymatic biosystem containing minimized reactions显示文摘Cell-free synthetic enzymatic biosystem is emerging to expand the traditional biotechnological mode by utilizing a number of purified/partially purified enzymes and coenzymes in a single reaction vessel for the production of desired products from low-cost substrates.Here,a cell-free synthetic biosystem containing minimized number of reactions was designed for the conversion of D-glucose to L-lactate via pyruvate.This NADH-balanced biosystem was comprised of only 5 thermophilic enzymes without ATP supplementation.After optimization of enzyme loading amounts,buffer concentration and cofactor concentration,D-glucose was converted to L-lactate with a product yield of∼90%.Our study has provided an emerging platform with potentials in producing pyruvatederived chemicals,and may promote the development of cell-free synthetic enzymatic biosystems for biomanufacturing.Leipeng Xie Xinlei Wei Xigui Zhou Dongdong Meng Ruimin Zhou Yi-Heng P.Job Zhang Shuxia Xu Chun You 2018Synthetic and Systems Biotechnology2018,3,3:3
17Mg-Fe LDH sealed PEO coating on magnesium for biodegradation control,antibacteria and osteogenesis显示文摘Attempt of developing bio-safety and functional layered double hydroxides(LDHs)modifed plasma electrolytic oxidation(PEO)coatings,has become a hotspot in the protection of magnesium(Mg)based biomedical implants.In the present work,Mg-Fe LDH flms with different Fe contents were fabricated on PEO coating via a novel two-step method:frstly,the Fe OOH flms were prepared by immersing PEO sample in Fe^(2+)-containing solution,and then Mg-Fe LDH flms were formed by transforming the Fe OOH flms via a hydrothermal treatment in water.The highly-oriented LDH nano-sheets could enhance the anti-corrosion performance of PEO coating,which was proved by the results of electrochemical test,hydrogen evolution and corroded morphology.PEO/Mg-Fe LDH coatings showed a low hemolysis rate(less5%)than PEO coating.In addition,PEO/Mg-Fe LDH coatings were more favorable for cell adhesion and proliferation than PEO coating.Moreover,PEO/Mg-Fe LDH coatings showed good photothermal conversion property,which demonstrated the excellent rapid antibacterial effect under NIR light.In vitro culture of rat bone marrow stem cell(r BMSC)suggested that cells cultured in the extract of PEO/Mg-Fe LDH coatings had a better osteogenic activity.In vivo subcutaneous implantation test revealed that PEO/Mg-Fe LDH coatings exhibited good anti-corrosion and histocompatibility.Dongdong Zhang Jielong Zhou Feng Peng Ji Tan Xianming Zhang Shi Qian Yuqin Qiao Yu Zhang Xuanyong Liu 2022Journal of Materials Science & Technology2022,,10:3
18Protective effects of catalpol and rhein in murine experimental autoimmune encephalomyelitis via regulation of T helper (Th)1, Th2,Th17, and regulatory T cell responses显示文摘OBJECTIVE:To examine the effects of catalpol and rhein on pro-and anti-inflammatory responses in C57 BL/6 mice with experimental autoimmune encephalomyelitis(EAE),a model of multiple sclerosis.METHODS:Female C57 BL/6 mice were randomly divided into four groups(n=30):(a)normal salinecontrol,(b)EAE control,(c)EAE+prednisone acetate(PA,6 mg/kg),and(d)EAE+catalpol(40 mg/kg)and rhein(5 mg/kg).EAE was induced by injection of myelin oligodendrocyte glycoprotein 35-55 plus pertussis toxin.Treatments were orally administered daily for 40 d.Disease progression and neurological function were assessed using a semi-quantitative scale of tail and limb paralysis.Brains and spinal cords were collected on Days 6,20,and 40 and assessed for histopathological changes by hematoxylin and eosin staining.Production of interleukin(IL)-2,IL-4,IL-10,and IL-17 A protein was measured by enzyme-linked immunosorbent assay.Expression of the T helper(Th)1-,Th2-,Th17-,and regulatory T cell(Treg)-specific transcription factors T-bet,GATA3,ROR-γt,and Foxp3,respectively,were analyzed by quantitative reverse-transcription polymerase chain reaction and western blot analysis.RESULTS:Combination treatment with catalpol and rhein significantly alleviated the clinical disability and neurological dysfunction of mice with EAE.Catalpol and rhein treatment also reduced the infiltration of pro-inflammatory T cells into pathological lesions;significantly increased the expression of the anti-inflammatory factors GATA3,Foxp3,IL-4,and IL-10;and significantly decreased the expression of the pro-inflammatory factors T-bet,ROR-γt,IL-2,and IL-17 A.CONCLUSION:Catalpol and rhein reduced the neurological disabilities of mice with EAE,at least in part by rebalancing the pro-and anti-inflammatory environment in the brains and spinal cords.Wei Mingyan Yang Tao Li Qian Zhou Dongdong Du Zongpan Fan Yongping 2019Journal of Traditional Chinese Medicine2019,39,6:3
19Metasurface-based subtractive color filter fabricated on a 12-inch glass wafer using a CMOS platform显示文摘Optical color filters are widely applied in many areas including display,imaging,sensing,holography,energy harvest,and measurement.Traditional dye-based color filters have drawbacks such as environmental hazards and instability under high temperature and ultraviolet radiation.With advances in nanotechnology,structural color filters,which are based on the interaction of light with designed nanostructures,are able to overcome the drawbacks.Also,it is possible to fabricate structural color filters using standard complementary metal-oxide-semiconductor(CMOS)fabrication facilities with low cost and high volume.In this work,metasurface-based subtractive color filters(SCFs)are demonstrated on 12-inch(300-mm)glass wafers using a CMOS-compatible fabrication process.In order to make the transmissive-type SCF on a transparent glass wafer,an in-house developed layer transfer process is used to solve the glass wafer handling issue in fabrication tools.Three different heights of embedded silicon nanopillars(110,170,and 230 nm)are found to support magnetic dipole resonances.With pillar height and pitch variation,SCFs with different displayed colors are achieved.Based on the resonance wavelength,the displayed color of the metasurface is verified within the red-yellow-blue color wheel.The simulation and measurement results are compared and discussed.The work provides an alternative design for high efficiency color filters on a CMOS-compatible platform,and paves the way towards mass-producible large-area metasurfaces.ZHENGJI XU NANXI LI YUAN DONG YUAN HSING FU TING HU QIZE ZHONG YANYAN ZHOU DONGDONG Li SHIYANG ZHU NAVAB SINGH 2021Photonics Research2021,9,1:3
20Injectable kartogenin and apocynin loaded micelle enhances the alleviation of intervertebral disc degeneration by adipose-derived stem cell显示文摘Cell transplantation has been proved the promising therapeutic effects on intervertebral disc degeneration(IVDD).However,the increased levels of reactive oxygen species(ROS)in the degenerated region will impede the efficiency of human adipose-derived stem cells(human ADSCs)transplantation therapy.It inhibits human ADSCs proliferation,and increases human ADSCs apoptosis.Herein,we firstly devised a novel amphiphilic copolymer PEG-PAPO,which could self-assemble into a nanosized micelle and load lipophilic kartogenin(KGN),as a single complex(PAKM).It was an injectable esterase-responsive micelle,and showed controlled release ability of KGN and apocynin(APO).Oxidative stimulation promoted the esterase activity in human ADSCs,which accelerate degradation of esterase-responsive micelle.Compared its monomer,the PAKM micelle possessed better bioactivities,which were attributed to their synergistic effect.It enhanced the viability,autophagic activation(P62,LC3 II),ECM-related transcription factor(SOX9),and ECM(Collagen II,Aggrecan)maintenance in human ADSCs.Furthermore,it is demonstrated that the injection of PAKM with human ADSCs yielded higher disc height and water content in rats.Therefore,PAKM micelles perform promoting cell survival and differentiation effects,and may be a potential therapeutic agent for IVDD.Chao Yu Dongdong Li Chenggui Wang Kaishun Xia Jingkai Wang Xiaopeng Zhou Liwei Ying Jiawei Shu Xianpeng Huang Haibin Xu Bin Han Qixin Chen Fangcai Li Jianbin Tang Chengzhen Liang Nigel Slater 2021Bioactive Materials2021,6,10:3
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