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1Quantitative analysis of hepatic hypoxia-inducible factor-1α and its abnormal gene expression during the formation of hepatocellular carcinoma显示文摘BACKGROUND:Hepatic hypoxia-inducible factor-1(HIF-1) is activated in the progression of hepatocellular carcinoma (HCC).This study aimed to investigate the dynamic alterations of HIF-1αand its gene expression so as to explore the relationship between HIF-1αexpression and hepatocarcinogenesis at the early stage of HCC. METHODS:A hepatoma model was made with 2-fluorenyl- acetamide(2-FAA)in male Sprague-Dawley rats.Morphological changes of rat hepatocytes were assessed pathologically (HE staining).The dynamic expression of hepatic and circulating HIF-1αwas quantitatively analyzed by ELISA. The gene fragments of hepatic HIF-1αmRNA were amplified by RT-PCR and confirmed by sequencing.The cellular distribution of hepatic HIF-1αexpression was confirmed by immunohistochemistry. RESULTS:Histological examination confirmed granulelike degeneration to atypical hyperplasia and HCC development in rat hepatocytes and progressive increases in the levels of hepatic and circulating HIF-1αand its gene expression during the course.The levels of HIF-1α expression in the liver and blood of rats with hepatoma were significantly higher than those in normal ratsand those with degeneration.Immunohistochemical analysis confirmed the positive expression and hepatocyte distribution of HIF-1αin the development of rat hepatoma. A positive relationship was found between HIF-1α expression in the liver and blood(P<0.01). CONCLUSIONS:The above observations support the hypothesis that the overexpression of HIF-1αand its gene are closely associated with the malignant transformation of hepatocytes and play an important role at the stage of hepatocarcinogenesis.Deng-Fu Yao,Hua Jiang,Min Yao,Yue-Ming Li,Wen-Jing Gu,Yu-Cheng Shen, Li-Wei Qiu,Wei Wu,Xin-Hua Wu and Wen-Li Sai Research Center of Clinical Molecular Biology,Department of Laboratory Science,and Department of Oncology,Affiliated Hospital of Nantong University,Nantong 226001, China Third Department of Medicine,Jiaonan People’s Hospital,Jiaonan 266400,China 2009Hepatobiliary & Pancreatic Diseases International2009,8,4:28
2value of contrast-enhanced ultrasound in the differential diagnosis of gallbladder lesion显示文摘AIM To describe contrast-enhanced ultrasound(CEUS) features and evaluate differential diagnosis value of CEUS and conventional ultrasound for patients with benign and malignant gallbladder lesions. METHODS This study included 105 gallbladder lesions. Before surgical resection and pathological examination, conventional ultrasound and CEUS were performed to examine for lesions. Then, all the lesions were diagnosed as(1) benign,(2) probably benign,(3) probably malignant or(4) malignant using both conventional ultrasound and CEUS. The CEUS features of these gallbladder lesions were analyzed and diagnostic efficiency between conventional ultrasound and CEUS was compared.RESULTS There were total 17 cases of gallbladder cancer and 88 cases of benign lesion. Some gallbladder lesions had typical characteristics on CEUS(e.g., gallbladder adenomyomatosis had typical characteristics of small nonenhanced areas on CEUS). The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of CEUS were 94.1%, 95.5%, 80.0%, 98.8%and 95.2%, respectively. These were significantly higher than conventional ultrasound(82.4%, 89.8%, 60.9%, 96.3% and 88.6%, respectively). CEUS had an accuracy of 100% for gallbladder sludge and CEUS helped in differential diagnosis among gallbladder polyps, gallbladder adenoma and gallbladder cancer.CONCLUSION CEUS may provide more useful information and improve the diagnosis efficiency for the diagnosis of gallbladder lesions than conventional ultrasound.Hui-Ping Zhang Min Bai Ji-Ying Gu Ying-Qian He Xiao-Hui Qiao Lian-Fang Du 2018World Journal of Gastroenterology2018,24,6:27
3Expression and significance of HBV genes and their antigens in human primary intrahepatic cholangiocarcinoma显示文摘INTRODUCTIONAlargenumberofstudiesindicateacloserelationshipbetweenhumanprimaryhepatocelularcarcinomaandhepatitisBvirus(HBV)in...WANG Wen Liang, GU Guang Yu and HU Min 1998World Journal of Gastroenterology1998,4,5:25
4Latest Progress of the Chinese Meteorological Satellite Program and Core Data Processing Technologies显示文摘In this paper,the latest progress,major achievements and future plans of Chinese meteorological satellites and the core data processing techniques are discussed.First,the latest three FengYun(FY)meteorological satellites(FY-2H,FY-3D,and FY-4A)and their primary objectives are introduced Second,the core image navigation techniques and accuracies of the FY meteorological satellites are elaborated,including the latest geostationary(FY-2/4)and polar-orbit(FY-3)satellites.Third,the radiometric calibration techniques and accuracies of reflective solar bands,thermal infrared bands,and passive microwave bands for FY meteorological satellites are discussed.It also illustrates the latest progress of real-time calibration with the onboard calibration system and validation with different methods,including the vicarious China radiance calibration site calibration,pseudo invariant calibration site calibration,deep convective clouds calibration,and lunar calibration.Fourth,recent progress of meteorological satellite data assimilation applications and quantitative science produce are summarized at length.The main progress is in meteorological satellite data assimilation by using microwave and hyper-spectral infrared sensors in global and regional numerical weather prediction models.Lastly,the latest progress in radiative transfer,absorption and scattering calculations for satellite remote sensing is summarized,and some important research using a new radiative transfer model are illustrated.Peng ZHANG Qifeng LU Xiuqing HU Songyan GU Lei YANG Min MIN Lin CHEN Na XU Ling Sun Wenguang BAI Gang MA Di XIAN 2019Advances in Atmospheric Sciences2019,36,9:26
5Optical storage arrays: a perspective for future big data storage显示文摘The advance of nanophotonics has provided a variety of avenues for light–matter interaction at the nanometer scale through the enriched mechanisms for physical and chemical reactions induced by nanometer-confined optical probes in nanocomposite materials.These emerging nanophotonic devices and materials have enabled researchers to develop disruptive methods of tremendously increasing the storage capacity of current optical memory.In this paper,we present a review of the recent advancements in nanophotonics-enabled optical storage techniques.Particularly,we offer our perspective of using them as optical storage arrays for next-generation exabyte data centers.Min Gu Xiangping Li Yaoyu Cao 2014Light(Science & Applications)2014,3,1:26
6A novel gene delivery system targeting cells expressing VEGF receptors显示文摘Two ligand oligopeptides GV1 and GV2 were designed according to the putative binding region of VEGF to its receptors. GV1, GV2 and endosome releasing oligopeptide HA20 were conjugated with poly-L-lysine or protamine and the resulting conjugates could interact with DNA in a noncovalent bond to form a complex. Using pSV2-β-galactosidase as a reporter gene, it has been demonstrated that exogenous gene was transferred into bovine aortic arch-derived endothelial cells (ABAE) andhuman malignant melanoma cell lines (A375) in vitro. In vivo experiments, exogenous gene was transferred into tumor vascular endothelial cells and tumor cells of subcutaneously transplanted human colon cancer LOVO, human malignant melanoma A375 and human hepatoma graft in nude mice. This system could also target gene to intrahepatically transplanted human hepatoma injected via portal vein in nude mice. These results are correlated with theGene delivery system targeting VEGF receptors relevant receptors (flt-1, flk-1/KDR) expression on the targeted cells and tissues.LI JUN MIN JUN SONG HAN YI HUANG PEI KUN TIAN SHU MIN QU MIN YAO HUI QIU JIANG DA FANG WAN JING CHU LUO CHENG XIAO GU JIAN REN GU( National Labomtory for Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai 200032,China)(National Laboratory of 1999Cell Research1999,9,1:22
7Wx^lv、the Ancestral Allele of Rice Waxy Gene显示文摘In rice grains,the Waxy (Wx) gene is responsible for the synthesis of amylose,the most important determinant for eating and cooking quality.The effects of several Wx alleles on amylose content and the taste of cooked rice have been elucidated.However,the relationship between artificial selection and the evolution of various Wx alleles as well as their distribution remain unclear.Here we report the identification of an ancestral allele,Wx^lv,which dramatically affects the mouthfeel of rice grains by modulating the size of amylose molecules.We demonstrated that WF originated directly from wild rice,and the three major Wx alleles in cultivated rice (Wx^b,Wx^a,and Wx^in) differentiated after the substitution of one base pair at the functional sites.These data indicate that the Wx^lv allele played an important role in artificial selection and domestication.The findings also shed light on the evolution of various Wx alleles,which have greatly contributed to improving the eating and cooking quality of rice.Changquan Zhang Jihui Zhu Shengjie Chen Xiaolei Fan Qianfeng Li Yan Lu Min Wang Hengxiu Yu Chuandeng Yi Shuzhu Tang Minghong Gu Qiaoquan Liu 2019Molecular Plant2019,12,8:22
8Resistin induces insulin resistance, but does not affect glucose output in rat-derived hepatocytes显示文摘目的: 现在的学习的目的是观察效果抵抗在在在导出老鼠的 hepatocytes.Methods 的胰岛素敏感度和葡萄糖输出上: 老鼠肝细胞瘤房间线 H4IIE 与有教养、刺激抵抗在; supernant 葡萄糖和肝糖内容被检测。胰岛素受体底层(红外)-1 和 IRS-2,蛋白质激酶 B/Akt,肝糖 synthase kinase-3 (3 (GSK-3p ) , suppress 或表明 3 的 cytokine (SOCS-3 ) ,蛋白质内容,以及磷酸化地位被西方的弄污估计。对 SOCS-3 指导的特定的反感觉 oligodeoxynucleotides 习惯于击倒的 SOCS-3.Results :抵抗素导致了抗胰岛素性,但是在老鼠肝细胞瘤房间的affect 葡萄糖输出没衬里 H4IIE.Resistin 胰岛素的稀释多重效果包括刺激胰岛素的肝糖合成和红外的磷酸化,蛋白质激酶 B/Akt ,象 GSK-3beta.Resistin 一样,处理显著地导致了基因和 SOCS-3 的蛋白质表示,胰岛素发信号的一个已知的禁止者。而且,对 SOCS-3 处理指导的特定的反感觉 oligodeoxynucleotide 阻止了抵抗在从反对胰岛素 action.Conclusion : 主要功能抵抗在在肝上是导致胰岛素 resistance.SOCS-3 感应的可以贡献胰岛素在 H4HE hepatocytes 发信号的调停 resistin 的抑制。Feng LIU Tao YANG Bin WANG Min ZHANG Nan GU Jie QIU Hong-qi FAN Chun-mei ZHANG Li FEI Xiao- qing PAN Mei GUO Rong-hua CHEN Xi-rong GUO 2008Acta Pharmacologica Sinica2008,29,1:21
9Secukinumab demonstrates high efficacy and a favorable safety profile over 52 weeks in Chinese patients with moderate to severe plaque psoriasis显示文摘Background:Psoriasis is a chronic inflammatory skin disease,affecting about 0.6%of the Chinese population.Many patients are not well controlled by conventional treatments,thus there is need for new treatment regimens.In this study,we assessed the efficacy and safety of secukinumab in Chinese patients with moderate to severe plaque psoriasis.Methods:This study was a 52-week,multicentre,randomized,double-blind,placebo-controlled,parallel-group,Phase 3 trial.A sub-population of study participants(≥18 years)of Chinese ethnicity were randomized to receive subcutaneous injections of 300 or 150 mg secukinumab,or placebo.The co-primary endpoints were psoriasis area severity index(PASI)75 and Investigator’s Global Assessment(IGA)0/1 at Week 12.Results:A total of 441 Chinese patients were enrolled in this study.Co-primary outcomes were achieved;300 and 150 mg secukinumab were superior to placebo as shown in the proportion of patients that achieved PASI 75(97.7%and 87.2%vs.3.7%,respectively;P<0.001),and IGA 0/1(82.3%and 69.7%vs.2.7%;P<0.001)at Week 12.Treatment efficacy was maintained until Week 52.There was no increase in overall adverse events with secukinumab relative to placebo throughout the 52-week period.Conclusion:Secukinumab is highly effective and well tolerated in Chinese patients with moderate to severe plaque psoriasis.Lin Cai Jian-Zhong Zhang Xu Yao Jun Gu Quan-Zhong Liu Min Zheng Shi-Fa Zhang Jin-Hua Xu Cheng-Xin Li Hao Cheng Qing Guo Wei-Li Pan Shen-Qiu Li Ruo-Yu Li Zai-Pei Guo Zhi-Qi Song Shan-Shan Li Xiu-Qin Dong Linda Wang Rong Fu Pascaline Regnault Pascal Charef Ratal Mazur Manmath Patekar 2020Chinese Medical Journal2020,,22:21
10Introgression of qPE9-1 allele,conferring the panicle erectness,leads to the decrease of grain yield per plant in japonica rice(Oryza sativa L.)显示文摘圆锥花序建筑学是仔细与产量有关形成。qPE9-1 基因被证明了广泛地在产量很高的米饭栽培变种开发被过去常,授与在装饰用的梨树米饭的直立的圆锥花序特性。最近, qPE9-1 成功地被克隆;然而,谷物产量上的基因效果还每直立的圆锥花序等位基因 qPE9-1 的植物是争论的。在现在的学习,低垂的圆锥花序父母 Nongken 57,带 qpe9-1 等位基因,被用作周期性父母到连续地回交到从双 haploid (DH ) 的一根典型直立的圆锥花序线人口(Wuyunjing 8/Nongken 57 ) ,它以前被显示带 qPE9-1 等位基因。因此,一双 near-isogenic 线(无) 被开发。在无之间的农学的特点的比较证明当 qpe9-1 被 qPE9-1 代替时,圆锥花序建筑学从低垂树立被改变;而且,圆锥花序长度,植物高度, 1000 谷物重量和 tillers 显著地被减少,因而在 30% 每植物导致谷物产量的戏剧的减少。因此,我们断定 qPE9-1 是控制圆锥花序建筑学的一个主要因素,并且 qPE9-1 有多种的自然,与每植物的谷物产量上的否定效果。这结果强烈建议直立的圆锥花序等位基因 qPE9-1 应该在产量很高的繁殖实践和另外的有利基因被使用。另外,吃并且煮质量上的 qPE9-1 的效果也在现在的学习被讨论。Xiuhua Yi Zujian Zhang Shengyuan Zeng Chunyan Tian Juncheng Peng Min Li Yue Lu Qingcai Meng Minghong Gu Changjie Yan 2011Journal of Genetics and Genomics2011,38,5:20
11Diagnostic Values of Vascular Endothelial Growth Factor and Epidermal Growth Factor Receptor for Benign and Malignant Hydrothorax显示文摘Yan Gu Min Zhang Guo-Hua Li Jun-Zhen Gao Liping Guo Xiao-Juan Qiao Li-Hong Wang Lan He Mei-Ling Wang Li Yan Xiu-Hua Fu 2015Chinese Medical Journal2015,,3:19
12Chemical characterization of size-resolved aerosols in four seasons and hazy days in the megacity Beijing of China显示文摘Size-resolved aerosol samples were collected by MOUDI in four seasons in 2007 in Beijing. The PM10 and PM1.8mass concentrations were 166.0 ± 120.5 and 91.6 ± 69.7 μg/m^3, respectively,throughout the measurement, with seasonal variation: nearly two times higher in autumn than in summer and spring. Serious fine particle pollution occurred in winter with the PM1.8/PM10 ratio of 0.63, which was higher than other seasons. The size distribution of PM showed obvious seasonal and diurnal variation, with a smaller fine mode peak in spring and in the daytime. OM(organic matter = 1.6 × OC(organic carbon)) and SIA(secondary inorganic aerosol) were major components of fine particles, while OM, SIA and Ca_2+were major components in coarse particles. Moreover, secondary components, mainly SOA(secondary organic aerosol) and SIA,accounted for 46%–96% of each size bin in fine particles, which meant that secondary pollution existed all year. Sulfates and nitrates, primarily in the form of(NH_4)_2SO_4, NH_4NO_3, Ca SO_4, Na_2SO_4 and K_2SO_4, calculated by the model ISORROPIA II, were major components of the solid phase in fine particles. The PM concentration and size distribution were similar in the four seasons on non-haze days, while large differences occurred on haze days, which indicated seasonal variation of PM concentration and size distribution were dominated by haze days. The SIA concentrations and fractions of nearly all size bins were higher on haze days than on non-haze days, which was attributed to heterogeneous aqueous reactions on haze days in the four seasons.Kang Sun Xingang Liu Jianwei Gu Yunpeng Li Yu Qu Junling An Jingli Wang Yuanhang Zhang Min Hu Fang Zhang 2015Journal of Environmental Sciences2015,27,6:19
13N6-Methyladenine DNA Methylation in Japonica and Indica Rice Genomes and Its Association with Gene Expression,Plant Development, and Stress Responses显示文摘N6-Methyladenine (6mA)DNA methylation has recently been implicated as a potential new epigenetic marker in eukaryotes,including the dioot modelArabidopsis thaliana.However,the conservation and divergence of 6mA distribution patterns and functions in plants remain elusive.Here we report high-quality 6mA methylomes at single-nucleotide resolution in rice based on substantially improved genome sequences of two rice cultivars,Nipponbare (Nip;Japonica)and 93-11 (Indica).Analysis of 6mA genomic distribution and its association with transcription suggest that 6mA distribution and function is rather conserved between rice and Arabidopsis.We found that 6mA levels are positively correlated with the expression of key stressrelated genes,which may be responsible for the difference in stress tolerance between Nip and 93-11. Moreover,we showed that mutations in DDM1 cause defects in plant growth and decreased 6mA level. Our results reveal that 6mA is a conserved DNA modification that is positively associated with gene expression and contributes to key agronomic traits in plants.Qian Zhang Zhe Liang Xuean Cui Changmian Ji Yun Li Pingxian Zhang Jingrong Liu Adeel Riaz Pu Yao Min Liu Yunpeng Wang Tiegang Lu Hao Yu Donglei Yang Hongkun Zheng Xiaofeng Gu 2018Molecular Plant2018,11,12:18
14Traditional Chinese medicine integrated with chemotherapy for stage Ⅳ non-surgical gastric cancer: a retrospective clinical analysis显示文摘OBJECTIVE: Traditional Chinese medicine(TCM) is regarded as an important treatment for gastric cancer patients, especially for those in advanced stage. To evaluate the effects of TCM treatment on gastric cancer patients, the authors performed a retrospective study to report the result of the integrated treatment of TCM with chemotherapy for stage IV non-surgical gastric cancer.METHODS: In this study, 182 patients with stage IV and non-surgical gastric cancer were retrospectively analyzed to evaluate the effects of TCM integrated with chemotherapy. Among the 182 cases, 88 cases received integrated therapy consisting of TCM and chemotherapy, while 94 cases received chemotherapy alone. The overall survival and Karnofsky performance status(KPS) score were measured as the main outcome.RESULTS: The median overall survival of the integrated therapy group and chemotherapy group were 16.9 and 10.5 months, respectively. The 1-, 3-and 5-year survival rates of integrated therapy group vs. chemotherapy group were 70% vs. 32%, 18% vs. 4%, and 11% vs. 0%, respectively. There was a significant difference between the two groups(χ2 = 42.244, P < 0.001). After six-month treatment, KPS scores of the integrated therapy group and the chemotherapy group were 75.00 ± 14.78 and 60.64 ± 21.39, respectively(P < 0.001). The Cox regression analysis showed that TCM treatment is a protective factor for patients' overall survival. CONCLUSION: This study demonstrated that TCM integrated with chemotherapy may prolong overall survival and improve survival rate and life quality of patients with stage IV non-surgical gastric cancer.xuan liu li-juan xiu jian-peng jiao jing zhao ying zhao ye lu jun shi yong-jin li min ye yu-fang gu xiao-wei wang jing-yu xu ci-an zhang yong-ying liu yun luo xiao-qiang yue 2017Journal of Integrative Medicine2017,15,6:18
15Overexpression of insulin-like growth factor-Ⅰ receptor as a pertinent biomarker for hepatocytes malignant transformation显示文摘AIM:To investigate the dynamic features of insulinlike growth factor-Ⅰreceptor(IGF-ⅠR)expression in rat hepatocarcinogenesis,and the relationship between IGF-ⅠR and hepatocytes malignant transformation at mRNA or protein level.METHODS:Hepatoma models were made by inducing with 2-fluorenylacetamide(2-FAA)on male SpragueDawley rats.Morphological changes of hepatocytes were observed by pathological Hematoxylin and eosin staining,the dynamic expressions of liver and serum IGF-ⅠR were quantitatively analyzed by an enzymelinked immunosorbent assay.The distribution of hepatic IGF-ⅠR was located by immunohistochemistry.The fragments of IGF-ⅠR gene were amplified by reverse transcription-polymerase chain reaction,and confirmed by sequencing.RESULTS:Rat hepatocytes after induced by 2-FAA were changed dynamically from granule-like degeneration,precancerous to hepatoma formation with the progressing increasing of hepatic mRNA or IGF-ⅠR expression.The incidences of liver IGF-ⅠR,IGF-ⅠR mRNA,specific IGF-ⅠR concentration(ng/mg wet liver),and serum IGF-ⅠR level(ng/mL)were 0.0%,0.0%,0.63±0.17,and 1.33±0.47 in the control;50.0%,61.1%,0.65±0.2,and 1.51±0.46 in the degeneration;88.9%,100%,0.66±0.14,and 1.92±0.29 in the precancerosis;and 100%,100%,0.96±0.09,and2.43±0.57 in the cancerous group,respectively.IGF-ⅠR expression in the cancerous group was significantly higher(P<0.01)than that in any of other groups at mRNA or protein level.The closely positive IGF-ⅠR relationship was found between livers and sera(r=0.91,t=14.222,P<0.01),respectively.CONCLUSION:IGF-ⅠR expression may participate in rat hepatocarcinogenesis and its abnormality should be an early marker for hepatocytes malignant transformation.Xiao-Di Yan Min Yao Li Wang Hai-Jian Zhang Mei-Juan Yan Xing Gu Yun Shi Jie Chen Zhi-Zhen Dong Deng-Fu Yao 2013World Journal of Gastroenterology2013,19,36:16
16Clinical application of subjective global assessment in Chinese patients with gastrointestinal cancer显示文摘AIM:To investigate the role of subjective global assessment(SGA) in nutritional assessment and outcome prediction of Chinese patients with gastro-intestinal cancer.METHODS:A total of 751 patients diagnosed with gastrointestinal cancer between August 2004 and August 2006 were enrolled in this study.Within 72 h after admission, SGA, anthropometric parameters, and laboratory tests were used to assess the nutritional status of each patient.The outcome variables including hospital stay, complications, and in-hospital medical expenditure were also obtained.RESULTS:Based on the results of SGA, 389(51.8%), 332(44.2%), and 30(4.0%) patients were classified into well nourished group(SGA-A), mildly to moderately malnourished group(SGA-B), and severely malnourished group(SGA-C), respectively.The prevalence of malnutrition classif ied by SGA, triceps skinfold thickness(TSF), mid-upper arm muscle circumference(MAMC), albumin(ALB), prealbumin(PA), and body mass index(BMI) was 48.2%, 39.4%, 37.7%, 31.3%, 21.7%, and 9.6%, respectively.In addition, ANOVA tests revealed significant differences in body mass index(BMI), TSF, PA, and ALB of patients in different SGA groups.The more severely malnourished the patient was, the lower the levels of BMI, TSF, PA, and ALB were(P < 0.05).χ2 tests showed a significant difference in SGA classif ication between patients receiving different types of treatment(surgery vs chemotherapy/radiotherapy).As the nutritional status classif ied by SGA deteriorated, the patients stayed longer in hospital and their medical expenditures increased significantly.Furthermore, multiple regression analysis showed that SGA and serum ALB could help predict the medical expenditures and hospital stay of patients undergoing surgery.The occurrence of complications increased in parallel with the increasing grade of SGA, and was the highest in the SGA-C group(23.3%) and the lowest in the SGA-A group(16.8%).CONCLUSION:SGA is a reliable assessment tool and helps to predict the hospital stay and medical expenditures of Chinese surgical gastrointestinal cancer patients.Bei-Wen Wu Tao Yin Wei-Xin Cao Zhi-Dong Gu Xiao-Jin Wang Min Yan Bing-Ya Liu 2009World Journal of Gastroenterology2009,15,28:16
17Obstructive sleep apnea is associated with impaired glucose metabolism in Han Chinese subjects显示文摘GU Chen-juan LI Min LI Qing-yun LI Ning SHI Guo-chao WAN Huan-ying 2013Chinese Medical Journal2013,,1:16
18Radiometric cross-calibration of the CBERS-02 CCD camera with the TERRA MODIS显示文摘For the application of the CCD camera, the most important payload on CBERS-02, the key is to provide long-term stable radiometric calibration coefficients. Although the vicarious calibration had been proved successful, it had its limitations such as test site requirement and unsuitable for historical data. Cross-calibration is one of the alternative methods, but it needs synchro surface spectrum to achieve spectral band matching factors. Our effort is to probe the influences on these factors. Simulations with a lot of surface spectrum showed that the factors changed with the viewing geometry, atmospheric condition and surface targets. However, simulating with the same viewing geometry and atmospheric condition, the spectral band matching factors of the same or similar surface targets’ spectrum acquired from different dates and different places would like to be consistent to each other within 1%―5%. Thus, the synchro measurement data can be substituted by the same or similar target from other source. Based on this method, using the MODIS as the reference, the cross-calibration was performed for CCD camera. The research demonstrated that the traditional method with single calibration site was inappropriate for CCD camera, since the offsets for its four spectral bands were not zeros. With four calibration sites, these offsets were obtained. And the camera was detected to degrade with dates based on four times of cross-calibrations.LI Xiaoying1,2,3, GU Xingfa1,3,4, MIN Xiangjun5, YU Tao1,3, FU Qiaoyan5, ZHANG Yong1,2,3 & LI Xiaowen1,3 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China 3. The Center for National Spaceborne Demonstration, Beijing 100101, China 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 5. China Center for Resource Satellite Data and Application, Beijing 100830, China 2005Science China(Technological Sciences)2005,48,S2:15
19Polyphyllin I inhibits proliferation and metastasis of ovarian cancer cell line HO-8910PM invitro显示文摘OBJECTIVE: To study the anticancer mechanism of polyphyllin I (PPI), a Traditional Chinese Medicine, on the ovarian cancer cell line HO-8910PM invitro. METHODS: Transwell chamber invasive assays were used to investigate the inhibitory capacity of PPI on HO-8910PM metastasis. Gene expression profiling chips was used to screen differentially expressed genes between experiment group and control group. Reverse transcription PCR and Western blotting were used to determine mRNA and protein levels. RESULTS: With increasing PPI concentration, the metastatic capacity of cells decreased, with significance differences between the experimental and control groups (P<0.01) as well as between two concentration groups. Gene expression profiling identified 123 differentially expressed genes, of which 70 were downregulated and 53 were upregulated. The genes were involved in multiple signal transduction pathways, including apoptosis, proliferation and metastasis. Real-time PCR (RT-PCR) showed that differential genes PIK3C2B, Caspase 9and Wnt5A were downregulated with increasing PPI, showing an evident dose-effect relationship. The c-Jun was an exception. As the PPI dosage increased and the exposure time was extended, c-Jun relative expression showed an upward trend. There were significant differences between the experiment and control (P<0.05). Western blot analyses showed that PPI treatment decreased levels of Caspase 9, Wnt5A and PIK3C2B and increased activatedCaspase9,c-Junandp-c-Junexpressionlevels. CONCLUSION: PPI has strong antitumor and anti transfer activity. It can activate c-Jun expression and the JNK signaling pathway, elicit cell apoptosis via the mitochondrial-mediated Caspase activation pathway, and finally inhibit tumor growth and mi- gration in vitro. The downregulation of PIK3C2B and Wnt5A jointly inhibit the proliferation and metastasis of HO-8910PM. PPI may be a novel treatment for ovarian cancer.Linhui Gu Jianguo Feng Haiyan Xu Min Luo Dan Su 2013Journal of Traditional Chinese Medicine2013,33,3:15
20Liver Enzymes Concentrations Are Closely Related to Pre-diabetes:Findings of the Shanghai Diabetes Study Ⅱ (SHDS Ⅱ)显示文摘Objective To investigate the relationship of liver enzymes with hyperglycemia in a large population in Shanghai and identify the association between liver enzymes and insulin resistance.Methods A total of 3 756 participants were enrolled.Each participant underwent an oral glucose tolerance test and completed a questionnaire.Anthropometric indices were recorded and serum samples were collected for measurement.Results Liver enzymes concentrations were independently associated with i-IGT,IFG+IGT,and diabetes.With the increase of ALT and GGT concentrations,ORs for i-IGT,IFG+IGT,and diabetes increased gradually.By comparing patients in the highest quartile of GGT concentrations or ALT concentrations with those in the lowest quartile (Q1),ORs for i-IGT,IFG+IGT,or diabetes was significant after adjustment.Both ALT and GGT concentrations were linearly correlated with HOMA-IR and independently associated with HOMA-IR [ALT OR (95% CI):2.56 (1.51-4.34) P=0.00;GGT OR (95% CI):2.66 (1.53-4.65) P=0.00].Conclusion Serum ALT and GGT concentrations were closely related to pre-diabetes and diabetes in the Shanghai population and positively associated with insulin resistance.GAO Fei PAN Jie Min HOU Xu Hong FANG Qi Chen LU Hui Juan TANG Jun Ling GU Hui Lin PAN Zhi Jian YAO You Hua SHEN Wei Zhen JIA Wei Ping 2012Biomedical and Environmental Sciences2012,25,1:15
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