维普中文期刊产品整合服务
614篇 您的检索式:作者名="Dong ZOU"
    题名 作者 年代 出处 被引量
1Apoptosis and its relationship with cell proliferation,p53,Waf1p21,bcl-2 and c-mycin esophageal carcinogenesis studied with a high-risk population in northern China显示文摘Apoptosisanditsrelationshipwithcelproliferation,p53,Waf1p21,bcl2andcmycinesophagealcarcinogenesisstudiedwithahighriskpopul...WANG LiDong1, ZHOU Qi1, WEI JunPing1, YANG WanCai1, ZHAO Xin1, WANG LiXia1, ZOU Jian Xiang1, GAO ShanShan1, LI YongXin1 and YANG C.S.2Keywords esophageal neoplasms apoptosis precancerous lesions Waf1 p21 gene p53 1998World Journal of Gastroenterology1998,4,4:295
2Berberine inhibits hepatic gluconeogenesis via the LKB1-AMPK-TORC2 signaling pathway in streptozotocin-induced diabetic rats显示文摘AIM: To investigate the molecular mechanisms of berberine inhibition of hepatic gluconeogenesis in a diabetic rat model.METHODS: The 40 rats were randomly divided into five groups. One group was selected as the normal group. In the remaining groups(n = 8 each), the rats were fed on a high-fat diet for 1 mo and received intravenous injection of streptozotocin for induction of the diabetic models. Berberine(156 mg/kg per day)(berberine group) or metformin(184 mg/kg per day)(metformin group) was intragastrically administered to the diabetic rats and 5-aminoimidazole-4-carboxamide1-β-D-ribofuranoside(AICAR)(0.5 mg/kg per day)(AICAR group) was subcutaneously injected to the diabetic rats for 12 wk. The remaining eight diabetic rats served as the model group. Fasting plasma glucose and insulin levels as well as lipid profile were tested.The expressions of proteins were examined by western blotting. The nuclear translocation of CREB-regulated transcription co-activator(TORC)2 was observed by immunohistochemical staining. RESULTS: Berberine improved impaired glucose tolerance and decreased plasma hyperlipidemia. Moreover, berberine decreased fasting plasma insulin and homeostasis model assessment of insulin resistance(HOMA-IR). Berberine upregulated protein expression of liver kinase(LK)B1, AMP-activated protein kinase(AMPK) and phosphorylated AMPK(p-AMPK). The level of phophorylated TORC2(p-TORC2) protein in the cytoplasm was higher in the berberine group than in the model group, and no significant difference in total TORC2 protein level was observed. Immunohistochemical staining revealed that more TORC2 was localized in the cytoplasm of the berberine group than in the model group. Moreover, berberine treatment downregulated protein expression of the key gluconeogenic enzymes(phosphoenolpyruvate carboxykinase and glucose-6-phosphatase) in the liver tissues. CONCLUSION: Our findings revealed that berberine inhibited hepatic gluconeogenesis via the regulation of the LKB1-AMPK-TORC2 signaling pathway.Shu-Jun Jiang Hui Dong Jing-Bin Li Li-Jun Xu Xin Zou Kai-Fu Wang Fu-Er Lu Ping Yi 2015World Journal of Gastroenterology2015,21,25:33
3Chinese Multidisciplinary Expert Consensus on the Diagnosis and Treatment of Hyperuricemia and Related Diseases显示文摘Zou, He-Jian Wu, Hu-Sheng Zhou, Jing-Guo Zeng, Xue-Jun Dai, Lie Wu, Hua-Xiang Zhu, Xiao-Xia Mei, Chang-Lin Hao, Chuan-Ming Chen, Nan Liu, Bi-Cheng Chen, Jiang-Hua Yang, Li Nie, Jing Yu, Chen Peng, Ai Yu, Sheng-Qiang Li, Lin Ge, Jun-Bo Huo, Yong Zhang, Shu-Yang Chen, Yun-Dai Dong, Yu-Gang Liang, Chun Dai, Yu-Xiang Gao, Xin Li, Chang-Gui Zhao, Jia-Jun Chen, Hai-Bing Cheng, Zhi-Feng Lin, Huan-Dong Guan, Yang-Tai Wang, Kai Luo, Ben-Yan Dai, Ruo-Lian Jiang, Quan Xue, Luan Liang, Chao-Chao Chen, Ming Fan, Song 2017Chinese Medical Journal2017,,20:30
4Progress in China's Unconventional Oil & Gas Exploration and Development and Theoretical Technologies显示文摘The new century has witnessed a strategic breakthrough in unconventional oil & gas.Hydrocarbon accumulated in micro-/nano-scale pore throat shale systems has become an important domain that could replace current oil & gas resources.Unconventional oil & gas plays an increasingly important role in our energy demand.Tight gas,CBM,heavy oil and asphaltic sand have served as a key domain of exploration & development,with tight oil becoming a 'bright spot' domain and shale gas becoming a 'hotspot' domain.China has made great breakthroughs in unconventional oil & gas resources,such as tight gas,shale gas,tight oil and CBM,and great progress in oil shale,gas hydrate,heavy oil and oil sand.China has an estimated(223-263)×10~8t of unconventional oil resources and(890-1260)×l0^(12)m^3 of gas resources.China has made a breakthrough for progress in unconventional oil & gas study.New progress achieved in fine-grained sedimentary studies related to continental open lacustrine basin large-scale shallow-water delta sand bodies,lacustrine basin central sandy clastic flow sediments and marine-continental fine-grained sediments provide a theoretical basis for the formation and distribution of basin central reservoir bodies.Great breakthroughs have been made in unconventional reservoir geology in respect of research methodology & technology,multi-scale data merging and physical simulation of formation conditions.Overall characterization of unconventional reservoirs via multi-method and multi-scale becomes increasingly popular and facilitates the rapid development of unconventional oil & gas geological theory,method and technology.The formation of innovative,continuous hydrocarbon accumulation theory,the establishment of the framework of the unconventional oil & gas geological theory system,and the determination of the implications,geological feature,formation mechanism,distribution rule and core technology of unconventional oil& gas geological study lays a theoretical foundation for extensive unconventional oil & gas exploration and development.Theories and technologies of unconventional oil & gas exploration and development developed rapidly,including some key evaluation techniques such as 'sweet spot zone' integrated evaluation and a six-property evaluation technique that uses hydrocarbon source,lithology,physical property,brittleness,hydrocarbon potential and stress anisotropy,and some key development &engineering technologies including micro-seismic monitoring,horizontal drilling & completion and 'factory-like' operation pattern, 'man-made reservoir' development,which have facilitated the innovative development of unconventional oil & gas.These breakthroughs define a new understanding in four aspects:①theoretical innovation;② key technologies;③ complete market mechanism and national policy support;and ④ well-developed ground infrastructure,which are significant for prolonging the life cycle of petroleum industry,accelerating the upgrade and development of theories and technologies and altering the global traditional energy structure.ZOU Caineng YANG Zhi ZHU Rukai ZHANG Guosheng HOU Lianhua WU Songtao TAO Shizhen YUAN Xuanjun DONG Dazhong WANG Yuman WANG Lan HUANG Jinliang WANG Shufang 2015Acta Geologica Sinica(English Edition)2015,89,3:27
5miR-93 suppresses proliferation and colony formation of human colon cancer stem cells显示文摘AIM:To identify differentially expressed microRNAs(miRNAs) in human colon cancer stem cells(SW1116csc) and study their function in SW1116csc proliferation.METHODS:SW1116csc were isolated from the humancolon cancer cell line,SW1116 and cultured in serum free medium. A miRNA microarray was used to detect differential expression profiles of miRNAs in SW1116cscand SW1116 cells. Real-time quantitative polymer asechain reaction(PCR) was performed to verify the differential expression of candidate miRNAs obtainedfrom the microarray. Target mRNAs of differentially expressed miRNAs were predicted with target prediction tools. miRNA expression plasmids were transfectedinto SW1116csc using Lipofectamine 2000 reagent. Cellproliferation curves were generated with trypan bluestaining,and the colony formation rate of transfectedcells was measured with the soft agar colony formationassay. Expression of target mRNAs and proteins from differentially expressed miRNAs were detected usingreverse transcription(RT) -PCR and western blotting.RESULTS:Compared with expression in SW1116 cells,35 miRNAs(including hsa-miR-192,hsa-miR-29b,hsa-miR-215,hsa-miR-194,hsa-miR-33a and hsa-miR-32) were upregulated more than 1.5-fold,and 11miRNAs(including hsa-miR-93,hsa-miR-1231,hsa-miRPlus-F1080,hsa-miR-524-3p,hsa-miR-886-3p andhsa-miR-561) were downregulated in SW1116csc. The miRNA microarray results were further validated with quantitative RT-PCR. miR-93 was downregulated,and its predicted mRNA targets included BAMBI,CCND2,CDKN1A,HDAC8,KIF23,MAP3K9,MAP3K11,MYCN,PPARD,TLE4 and ZDHHC1. Over expressed miR-93 sig-nificantly in hibited cell proliferation and colony formation by SW1116csc. Furthermore,miR-93 negatively regulated the mRNA and protein levels of HDAC8 and TLE4.CONCLUSION:Some miRNAs were differentially expressed during differentiation of SW1116csc into SW1116cells. miR-93 may inhibit SW1116csc proliferation andcolony formation.Xiao-Feng Yu Jian Zou Zhi-Jun Bao Jie Dong 2011World Journal of Gastroenterology2011,17,42:21
6Overexpression of B7-H3 augments anti-apoptosis of colorectal cancer cells by Jak2-STAT3显示文摘AIM:To investigate the role of the overexpression of B7-H3 in apoptosis in colorectal cancer cell lines and the underlying molecular mechanisms.METHODS:SW620 cells that highly overexpressed B7-H3(SW620-B7-H3-EGFP)and HCT8 cells stably transfected with B7-H3 sh RNA(HCT8-sh B7-H3)were previously constructed in our laboratory.Cells transfected with p IRES2-EGFP were used as negative controls(SW620-NC and HCT8-NC).Real-time PCR and western blotting analysis were used to detect the m RNA and protein expressions of the apoptosis regulator proteins Bcl-2,Bcl-xl and Bax.A cell proliferation assay was used to evaluate the survival rate and drug sensitivity of the cells.The effect of drug resistance was detected by a cell cycle assay.Active caspase-3western blotting was used to reflect the anti-apoptotic ability of cells.Western blotting was also performed to determine the expression of proteins associated with the Jak2-STAT3 signaling pathway and the apoptosis regulator proteins after the treatment with AG490,a Jak2 specific inhibitor,in B7-H3 overexpressing cells.The data were analyzed by Graph Pad Prism 6 using a non-paired t-test.RESULTS:Whether by overexpression in SW620cells or downregulation in HCT8,B7-H3 significantly affected the expression of anti-and pro-apoptotic proteins,at both the transcriptional and translational levels,compared with the negative control(P<0.05).A cell proliferation assay revealed that B7-H3overexpression increased the drug resistance of cells and resulted in a higher survival rate(P<0.05).In addition,the results of cell cycle and active caspase-3western blotting proved that B7-H3 overexpression inhibited apoptosis in colorectal cancer cell lines(P<0.05).B7-H3 overexpression improved Jak2 and STAT3phosphorylation and,in turn,increased the expression of the downstream anti-apoptotic proteins B-cell CLL/lymphoma 2(Bcl-2)and Bcl-xl,based on western blotting(P<0.05).After treating B7-H3 overexpressing cells with the Jak2-specific inhibitor AG490,the phosphorylation of Jak2 and STAT3,and the expression of Bcl-2 and Bcl-xl,decreased accordingly(P<0.05).This finding suggested that the Jak2-STAT3 pathway is involved in the mechanism mediating the anti-apoptotic ability of B7-H3.CONCLUSION:The overexpression of B7-H3 induces resistance to apoptosis in colorectal cancer cell lines by upregulating the Jak2-STAT3 signaling pathway,potentially providing new approaches to the treatment of colorectal cancer.Ting Zhang Bo Jiang Shi-Tao Zou Fen Liu Dong Hua 2015World Journal of Gastroenterology2015,21,6:21
7Histological Subtypes of Lung Cancer in Chinese Males from 2000 to 2012显示文摘Objective To characterize the histological and epidemiological features of male lung cancer patients in China. Methods The demographic and histological information about male lung cancer patients identified from 2000-01-01 to 2012-12-31,was collected from the Cancer Hospital of the Chinese Academy of Medical Sciences. Relative frequencies(RF) were estimated for major histological subtypes and compared according to the years of diagnosis and birth. Results The RF of adenocarcinoma(ADC) increased from 21.96% to 43.36% and the RF of squamous cell carcinoma(SCC) decreased from 39.11% to 32.23% from 2000 to 2012 in the 15 427 male lung cancer patients included in this study(Z=17.909,P<0.0001; Z=-6.117,P<0.0001). The RF of ADC increased from 28.72% in 2000-2004,36.88% in 2005-2008 to 48.61% in 2009-2012 in patients born after 1960. The age-adjusted RF of ADC in 2007-2012 increased consistently in all the investigated areas. Conclusion The increased RF of ADC in male lung cancer patients highlights the need for further investigation of the etiologic factors of these tumors. Smoke-free policies rather than modifying tobacco products should be enforced.ZOU Xiao Nong LIN Dong Mei WAN Xia CHAO Ann FENG Qin Fu DAI Zhen YANG Gong Huan LV Ning 2014Biomedical and Environmental Sciences2014,27,1:19
8Fecal microbiota transplantation induces remission of infantile allergic colitis through gut microbiota re-establishment显示文摘AIM To investigate the impact of fecal microbiota transplantation(FMT) treatment on allergic colitis(AC) and gut microbiota(GM).METHODS We selected a total of 19 AC infants,who suffered from severe diarrhea/hematochezia,did not relieve completely after routine therapy or cannot adhere to the therapy,and were free from organ congenital malformations and other contraindications for FMT. Qualified donor-derived stools were collected and injected to the AC infants via a rectal tube. Clinical outcomes and follow-up observations were noted. Stools were collected from ten AC infants before and after FMT,and GM composition was assessed for infants and donors using 16 S r DNA sequencing analysis.RESULTS After FMT treatment,AC symptoms in 17 infants were relieved within 2 d,and no relapse was observed in the next 15 mo. Clinical improvement was also detected in the other two AC infants who were lost to followup. During follow-up,one AC infant suffered from mild eczema and recovered shortly after hormone therapy. Based on the 16 S r DNA analysis in ten AC infants,most of them(n = 6) had greater GM diversity after FMT. As a result,Proteobacteria decreased(n = 6) and Firmicutes increased(n = 10) in post-FMT AC infants. Moreover,Firmicutes accounted for the greatest proportion of GM in the patients. At the genus level,Bacteroides(n = 6),Escherichia(n = 8),and Lactobacillus(n = 4) were enriched in some AC infants after FMT treatment,but the relative abundances of Clostridium(n = 5),Veillonella(n = 7),Streptococcus(n = 6),and Klebsiella(n = 8) decreased dramatically.CONCLUSION FMT is a safe and effective method for treating pediatric patients with AC and restoring GM balance.Sheng-Xuan Liu Yin-Hu Li Wen-Kui Dai Xue-Song Li Chuang-Zhao Qiu Meng-Ling Ruan Biao Zou Chen Dong Yan-Hong Liu Jia-Yi He Zhi-Hua Huang Sai-Nan Shu 2017World Journal of Gastroenterology2017,23,48:19
9Expression and role of 5-HT7 receptor in brain and intestine in rats with irritable bowel syndrome显示文摘背景 5-hydroxytryptamine7 受体( 5-HT7 受体, 5-HT7R )在光滑的肌肉松驰和内脏的感觉和力量的规定起一个重要作用涉及胃肠的运动障碍的致病,在这研究的 .The 目的是在 lBS.Methods 的致病调查 5-HT7 受体的角色的急躁的肠症候群( IBS )的腹的疼痛和内脏的 paresthesia 有腹泻( IBS-D )的急躁的肠症候群的一个老鼠模型被结肠的 instiZOU Bai-cang DONG Lei WANG Yan WANG Sheng-hao CAO Ming-bo 2007Chinese Medical Journal2007,,23:15
10Jiao-tai-wan Up-regulates Hypothalamic and Peripheral Circadian Clock Gene Cryptochrome and Activates PI3K/AKT Signaling in Partially Sleep-deprived Rats显示文摘Wen-ya HUANG Xin ZOU Fu-er LU Hao SU Chu ZHANG Yan-lin REN Ke FANG Li-jun XU Kai- fu WANG Qing-jie CHEN Hui DONG 2018Current Medical Science2018,38,4:13
11Acupuncture through Baihui (DU20) to Qubin (GB7) mitigates neurological impairment after intracerebral hemorrhage显示文摘Inflammation plays an important role in nerve defects caused by intracerebral hemorrhage. Repairing brain damage by inhibiting the macrophage-inducible C-type lectin/spleen tyrosine kinase(Mincle/Syk) signaling pathway is a potential new target for treating cerebral hemorrhage. In this study, we aimed to determine whether acupuncture through Baihui(DU20) to Qubin(GB7) is an effective treatment for intracerebral hemorrhage through the Mincle/Syk signaling pathway. An intracerebral hemorrhage rat model was established by autologous blood infusion into the caudate nucleus. Acupuncture through Baihui to Qubin was performed for 30 minutes, once every 12 hours, for a total of three times. Piceatannol(34.62 mg/kg), a Syk inhibitor, was intraperitoneally injected as a control. Modified neurological severity score was used to assess neurological function. Brain water content was measured. Immunohistochemistry and western blot assay were used to detect immunoreactivity and protein expression levels of Mincle, Syk, and CARD9. Real-time polymerase chain reaction was used to determine interleukin-1β m RNA levels. Hematoxylin-eosin staining was performed to observe histopathological changes. Our results showed that acupuncture through Baihui to Qubin remarkably improved neurological function and brain water content, and inhibited immunoreactivity and expression of Mincle, Syk, CARD9, and interkeukin-1β. Moreover, this effect was similar to piceatannol. These findings suggest that acupuncture through Baihui to Qubin can improve neurological impairment after cerebral hemorrhage by inhibiting the Mincle/Syk signaling pathway.Xiao-Ying Liu Xiao-Hong Dai Wei Zou Xue-Ping Yu Wei Teng Ying Wang Wei-Wei Yu Hui-Hui Ma Qiu-Xin Chen Peng Liu Rui-Qiao Guan Shan-Shan Dong 2018Neural Regeneration Research2018,13,8:13
12Enhancement Expression of bFGF in Chinese Patients with Moyamoya Disease显示文摘Objective To detect the content of the basic fibroblast growth factor in blood samples of patients with Moyamoya disease, and investigate the relationship between Moyamoya disease and the basic fibroblast growth factor. Methods This tissue microarray study included 24 cases of superficial temporal artery samples, 15 cases of Moyamoya disease, and 9 cases of normal arteries as control, and bFGF immunofluorescence assay was applied to test the samples. The number of positive cells and total cells of the muscular layer and the endothelium layer were counted separately in every picture, the positive rates were calculated, and the experimental data were analyzed statistically. Results The bFGF immunofluorescence staining of smooth muscular layer cells, intima cells and endothelial cells from the moyamoya disease group were obviously stronger than that from the control group (P<0.01). Conclusion The enhancement expression of bFGF in the Moyamaya disease group implicates that bFGF plays an important part in the pathogenesis of Moyamoya disease.ZOU DeWei ZHAO JiZong ZHANG Dong WANG Shuo WANG KeDa ZHANG Yan 2011Biomedical and Environmental Sciences2011,24,1:12
13Rice Expression Database(RED):An integrated RNA-Seq-derived gene expression database for rice显示文摘Rice is one of the most important stable food as well as a monocotyledonous model organism for the plant research community.Here,we present RED(Rice Expression Database;http://gffzzd1bc3ab4bbbc4005hovcwuonu6vuo6c0v.ffgz.tsg.suse.edu.cn),an integrated database of rice gene expression profiles derived entirely from RNA-Seq data.RED features a comprehensive collection of 284 high-quality RNA-Seq experiments,integrates a large number of gene expression profiles and covers a wide range of rice growth stages as well as various treatments.Based on massive expression profiles,RED provides a list of housekeeping and tissue-specific genes and dynamically constructs co-expression networks for gene(s) of interest.Besides,it provides user-friendly web interfaces for querying,browsing and visualizing expression profiles of concerned genes.Together,as a core resource in BIG Data Center,RED bears great utility for characterizing the function of rice genes and better understanding important biological processes and mechanisms underlying complex agronomic traits in rice.Lin Xia Dong Zou Jian Sang Xingjian Xu Hongyan Yin Mengwei Li Shuangyang Wu Songnian Hu Lili Hao Zhang Zhang 2017Journal of Genetics and Genomics2017,44,5:12
14Changes of p53 protein blood level in esophageal cancer patients and normal subjects from a high incidence area in Henan,China显示文摘Changesofp53proteinbloodlevelinesophagealcancerpatientsandnormalsubjectsfromahighincidenceareainHenan,ChinaYUGuoQiang1,ZHOU...YU GuoQiang1, ZHOU Qi1, DING Ivan2, GAO ShanShan1, ZHENG ZuoYu1, ZOU JianXiang1, LI YongXin1 and WANG LiDong1 1998World Journal of Gastroenterology1998,4,4:12
15Insight-HXMT observations of the first binary neutron star merger GW170817显示文摘Finding the electromagnetic(EM) counterpart of binary compact star merger, especially the binary neutron star(BNS) merger,is critically important for gravitational wave(GW) astronomy, cosmology and fundamental physics. On Aug. 17, 2017,Advanced LIGO and Fermi/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart,GRB 170817 A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope(HE) onboard Insight-HXMT(Hard X-ray Modulation Telescope) is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart(SSS17 a/AT2017 gfo) with very large collection area(~1000 cm^2) and microsecond time resolution in 0.2-5 MeV. In addition,Insight-HXMT quickly implemented a Target of Opportunity(ToO) observation to scan the GW localization area for potential X-ray emission from the GW source. Although Insight-HXMT did not detect any significant high energy(0.2-5 MeV) radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817 A. Meanwhile,Insight-HXMT/HE provides one of the most stringent constraints(~10^(-7) to 10^(-6) erg/cm^2/s) for both GRB170817 A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of Insight-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event.TiPei Li ShaoLin Xiong ShuangNan Zhang FangJun Lu LiMing Song XueLei Cao Zhi Chang Gang Chen Li Chen TianXiang Chen Yong Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong YuanYuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li XiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li XiaoHua Liang JinYuan Liao CongZhan Liu GuoQing Liu HongWei Liu ShaoZhen Liu XiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge OU JinLu Qu Na Sai Liang Sun Yin Tan Lian Tao WenHui Tao YouLi Tuo GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BoBing WU Mei Wu GuangCheng Xiao He Xu YuPeng Xu LinLi Yan JiaWei Yang Sheng Yang YanJi Yang AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang Shu Zhang Tong Zhang Wei Zhang WanChang Zhang WenZhao Zhang Yi Zhang Yue Zhang YiFei Zhang YongJie Zhang Zhao Zhang ZiLiang Zhang HaiSheng Zhao JianLing Zhao XiaoFan Zhao ShiJie Zheng Yue Zhu YuXuan Zhu ChangLin Zou 2018Science China(Physics,Mechanics & Astronomy)2018,61,3:12
16Design and performance analysis of orthogonal coding signal in MIMO-SAR显示文摘Multi-input multi-output (MIMO) radar which has evident advantages in many applications is a new radar system.Applying the MIMO technique to the earth observing synthetic aperture radar (SAR) system offers effective ways for the improvement of high resolution and wide swath imaging and ground moving target indication (GMTI) systems.Designing the optimal orthogonal waveform is a crucial problem in the research on MIMO radar.First,the index definition of synthetic integrated side-lobe level ratio (ISLR) is proposed by focusing on the SAR application and considering the cross-correlation energy influences between orthogonal coding signals with the same frequency band.Second,it is theoretically demonstrated that the performance of synthetic ISLR of orthogonal coding signals with the same frequency band cannot meet the demands of SAR imaging,which has been proved by one-dimensional numerical simulation. Third,it has been shown through numerical simulation that the performance of synthetic ISLR of orthogonal coding signals still cannot be improved by dealing with the mismatched filtering.Finally,a set of orthogonal phase coding signals are designed for multiple MIMO-SAR antennas.The conclusions are verified through MIMO-SAR imaging and InSAR simulation experiments.ZOU Bo DONG Zhen LIANG DianNong 2011Science China(Information Sciences)2011,54,8:11
17Solution structure of the RNA recognition domain of METTL3-METTL14 N^6-methyladenosine methyltransferase显示文摘N^6-methyladenosine(m6A),a ubiquitous RNA modification,is installed by METTL3-METTL14 complex.The structure of the heterodimeric complex between the methyltransferase domains(MTDs)of METTL3 and METTL14 has been previously determined.However,the MTDs alone possess no enzymatic activity.Here we present the solution structure for the zinc finger domain(ZFD)of METTL3,the inclusion of which fulfills the methyltransferase activity of METTL3-METTL14.We show that the ZFD specifically binds to an RNA containing 5'-GGACU-3'consensus sequence,but does not to one without.The ZFD thus serves as the target recognition domain,a structural feature previously shown for DNA methyltransferases,and cooperates with the MTDs of METTL3-METTL14 for catalysis.However,the interaction between the ZFD and the specific RNA is extremely weak,with the binding affinity at several hundred micromolar under physiological conditions.The ZFD contains two CCCH-type zinc fingers connected by an anti-parallel P-sheet.Mutational analysis and NMR titrations have mapped the functional interface to a contiguous surface.As a division of labor,the RNA-binding interface comprises basic residues from zinc finger 1 and hydrophobic residues fromβ-sheet and zinc finger 2.Further we show that the linker between the ZFD and MTD of METTL3 is flexible but partially folded,which may permit the cooperation between the two domains during catalysis.Together,the structural characterization of METTL3 ZFD paves the way to elucidate the atomic details of the entire process of RNA m6A modification.Jinbo Huang Xu Dong Zhou Gong Ling-Yun Qin Shuai Yang Yue-Ling Zhu Xiang Wang Delin Zhang Tingting Zou Ping Yin Chun Tang 2019Protein & Cell2019,10,4:11
18Virologic characteristics of hepatitis B virus in patients infected via maternal-fetal transmission显示文摘AIM: To determine whether HBV with the same characteristics causes dissimilar mutations in different hosts. METHODS: Full-length HBV genome was amplified and linked with pMD T18 vector. Positive clones were selected by double-restriction endonuclease digestion (EcoRⅠ and HindⅢ) and PCR. Twenty seven clones were randomly selected from an asymptomatic mother [at two time points: 602 (1 d) and 6022 (6 mo)] and her son [602 (S)], and the phylogenetic and mutational analysis was performed using BioEditor, Clustal X and MEGA software. Potential immune epitopes were determined by the Stabilized Matrix Method (SMM), SMM-Align Method and Emini Surface Accessibility Prediction. RESULTS: All of the 27 sequences were genotype C, the divergence between the mother and son was 0%-0.8%. Compared with another 50 complete sequences of genotype C, the mother and her son each had 13 specific nucleotides that differed from the other genotype C isolates. AA 1-11 deletion in preS1 was the dominant mutation in the mother (14/18). The 1762T/1764A double mutation existed in all clones of the mother, 3 of them were also coupled with G1896A mutation, but none were found in the son.17 bp deletion starting at nucleotide 2330 was the major mutation (5/9) in the son, which caused seven potential HLA class Ⅰ epitopes and one B cell epitope deletion, and produced a presumptive new start codon, downstream from the original one of the P gene. CONCLUSION: The HBV strain in the son came from his mother, and discrepant mutation occurred in the mother and her son during infection.Tao Shen Xin-Min Yan Yun-Lian Zou Jian-Mei Gao Hong Dong 2008World Journal of Gastroenterology2008,14,37:11
19Proteome of human colon cancer stem cells:A comparative analysis显示文摘AIM: To isolate and identify the biological characteristics of human colon cancer stem cells (SW1116 cells) and further study their proteome. METHODS: SW1116 cells were isolated and cultured with a serum-free medium (SFM). Sphere formation was assayed to observe the formation of colon cancer stem cell spheres. SW1116 cells were inoculated into a serum-containing medium for observing their differentiation characteristics. Proliferation curve and cross-resistance of SW1116 cells to different drugs were detected by MTT. Percentage of SP cells in SW1116 cells was detected with Hoechst33342 staining. Telomerase activity in SW1116cells was checked by polymerase chain reaction (PCR)-enzyme linked immunosorbent assay. Expressions of stem cell relevant genes and proteins were detected by reverse transcription-PCR and Western blot, respectively. Total protein was isolated from SW1116 cells by two-dimensional gel electrophoresis (2-DE) and differentially expressed proteins were identified by tandem mass spectrometry (MALDI-TOF/TOF). RESULTS: The isolated SW1116 cells presented as spheroid and suspension growths in SFM with a strong self-renewal, proliferation, differentiation and drug-resistance ability. The percentage of SP cells in SW1116 cells was 38.9%. The SW1116 cells co-expressed the CD133 and CD29 proteins. The telomerase activity in SW1116 cells was increased. The expressions of different stem cell relevant genes and proteins were detected. The proteomic analysis showed that the 26 protein spots were differently expressed in SW1116 cells and 10 protein spots were identified as ubiquitin fusiondegradation 1-like protein, nuclear chloride channel protein, tubulin β, Raichu404X, stratifi n, F-actin capping protein α-1 subunit, eukaryotic translation elongation factor 1 delta isoform 2, hypothetical protein, glyceraldehyde-3-phosphate dehydrogenase and guanine nucleotide binding protein β polypeptide 2-like 1, respectively. CONCLUSION: SW1116 cells are biologically characterized by self-renewal, proliferation and differentiation, and the differently expressed proteins in SW1116 cells may be essential for isolating cancer stem cells.Jian Zou Xiao-Feng Yu Zhi-Jun Bao Jie Dong 2011World Journal of Gastroenterology2011,17,10:10
20Methods for Shale Gas Play Assessment: A Comparison between Silurian Longmaxi Shale and Mississippian Barnett Shale显示文摘Based on field work, organic geochemical analyses and experimental testing, a six-property assessment method for shale gas is proposed. These six properties include organic matter properies, lithofacies, petrophysical properties, gas content, brittleness and local stress field. Due to the features of continuous distribution over a large area and low resource abundance in shale plays, a sweet spot should have these following properties:(a) TOC>2%;(b) brittle minerals content(>40%) and clay minerals(<30%);(c) Ro(>1.1%);(d) porosity(>2%) and permeability(>0.000 1 m D), and(e) effective thickness(30–50 m). Applying these criteria in the Sichuan Basin, the Silurian Longmaxi shale consists of four prospecting sweet spots, including blocks of Changning, Weiyuan, Zhaotong and Fushun-Yongchuan. Although these four blocks have some similarities, different features were usually observed. After comprehensive analyses using the six-property assessment method, the Fushun-Yongan Block ranks the most favorable sweet spot, followed by the Weiyuan Block. For the other two blocks, the Changning Block is better than the Zhaotong Block. By comparing with the Mississippian Barnett shale, characteristics that are crucial for a high-yielding in the Sichuan Basin include a high content of organic matter(TOC>2.5%), a moderate thermal maturity(Ro=0.4%–2%), a high content of brittle minerals(quartz: 30%–45%), a high gas content(>2.5 m3?t-1), and types I and II1 kerogen.Songqi Pan Caineng Zou Zhi Yang Dazhong Dong Yuman Wang Shufang Wang Songtao Wu Jinliang Huang Qun Liu Dule Wang Ziyuan Wang 2015Journal of Earth Science2015,26,2:10
返回顶部 每页显示:
共31页 首页 上一页 第1页 下一页 末页 /31 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