维普中文期刊产品整合服务
761篇 您的检索式:作者名="Qiu Peng"
    题名 作者 年代 出处 被引量
1The first offshore natural gas hydrate production test in South China Sea显示文摘Natural gas hydrates (NGH)is one of key future clean energy resources.Its industrialized development will help remit the huge demand of global natural gas,relieve the increasing pressure of the environment, and play a vital role in the green sustainable growth of human societies.Based on nearly two decades' studying on the reservoir characteristics in the South China Sea (SCS)and the knowledge of reservoir system,the China Geological Survey (CGS)conducted the first production test on an optimal target selected in Shenhu area SCS in 2017.Guided by the 'three-phase control'exploitation theory which focused on formation stabilization,technologies such as formation fluid extraction,well drilling and completing, reservoir stimulating,sand controlling,environmental monitoring,monitoring and preventing of secondary formation of hydrates were applied.The test lasted for 60 days from May 10^th when starting to pump, drop pressure and ignite to well killing on July 9^th,with gas production of 3.09×10^5 m^3 in total,which is a world record with the longest continuous duration of gas production and maximal gas yield.This successful test brings a significant breakthrough on safety control of NGH production.Jin-fa Li Jian-liang Ye Xu-wen Qin Hai-jun Qiu Neng-you Wu Hai-long Lu Wen-wei Xie Jing-an Lu Fei Peng Zhen-qiang Xu Cheng Lu Zeng-gui Kuang Jian-gong Wei Qian-yong Liang Hong-feng Lu Bei-bei Kou 2018China Geology2018,1,1:117
2Research progress on the etiology and pathogenesis of adolescent idiopathic scoliosis显示文摘Etiology of adolescent idiopathic scoliosis(AIS),a complicated three-dimensional spinal deformity with early-onset,receives continuous attention but remains unclear.To gain an insight into AIS pathogenesis,this review searched PubMed database up to June 2019,using key words or medical subject headings terms including'adolescent idiopathic scoliosis,''scoliosis,''pathogenesis,''etiology,''genetics,''mesenchymal stem cells,'and their combinations,summarized existing literatures and categorized the theories or hypothesis into nine aspects.These aspects include bone marrow mesenchymal stem cell studies,genetic studies,tissue analysis,spine biomechanics measurements,neurologic analysis,hormone studies,biochemical analysis,environmental factor analysis,and lifestyle explorations.These categories could be a guidance for further etiology or treatment researches to gain inspiration.Yue Peng Sheng-Ru Wang Gui-Xing Qiu Jian-Guo Zhang Qian-Yu Zhuang 2020Chinese Medical Journal2020,,4:45
3Significance of cyclooxygenase-2 expression in human primary hepatocellular carcinoma显示文摘AIM: To clarify the significance of cyclooxygenase-2 (COX-2) expression in human primary hepatocellular carcinoma(HCC) and adjacent nontumorous tissues.METHODS: The COX-2 protein and mRNA were investigatedin 27 HCC tissues with adjacent nontumorous tissues, and 5histologically normal liver tissues, using immunohistochemistryand in situ hybridization.RESULTS: The well-differentiated HCC expressed COX-2protein (5.68±1.19) more strongly than moderated HCC(3.43± 1.98) and poor differentiated HCC (3.33± 1.50)(P<0.05 respectively), adjacent nontumorous tissues (4.93±1.05) and normal liver tissues (3.20±1.g2) (P<0.01respectively); More intensive staining of COX-2 in adjacentnontumorous tissues was observed than that in normal livertissues (P<0.05). There was no significant difference amongadjacent nontumorous tissues, moderately differentiated HCCand poorly differentiated HCC (P>0.05). The expression ofCOX-2 mRNA was observed in the cytoplasm of the cells ofHCC and of the hepatocytes in adjacent nontumorous tissuesin which COX-2 protein was positive.CONCLUSION: The overexpression of COX-2 in well-differentiated HCC suggests that COX-2 may play a role inthe early stages of hepatocarcinogensis.De-Kai Qiu Xiong Ma Yan-Shen Peng Xiao-Yu Chen Shanghai Institute of Digestive Diseases,Renji Hospital,Shanghai Second Medical University,Shanghai,200001,China 2002World Journal of Gastroenterology2002,8,5:31
4The trend, seasonal cycle, and sources of tropospheric NO_2 over China during 1997―2006 based on satellite measurement显示文摘The characteristics of spatial and temporal distribution of tropospheric NO2 column density concen-tration over China are presented,on the basis of measurements from the satellite instruments GOME and SCIAMACHY.From these observations,monthly averaged tropospheric NO2 variations are deter-mined for the period of 1997 to 2006.The trend and seasonal cycle are also investigated.The possible source of tropospheric NO2 over megacity area is discussed in this paper.The results show a large growth of tropospheric NO2 over eastern China,especially above the industrial areas with a fast eco-nomical growth,such as,Yangtze Rive Delta region and Pearl River Delta region because of the prominent anthropogenic activity.There is a rapid increase of tropospheric NO2 over megacities in China.For instance,Shanghai had a linear significant increase in NO2 columns of ~20% per year(ref-erence year 1997) in the period of 1997―2006,which is the rapidest increase among all the selected cities.The seasonal pattern of the NO2 concentration shows a difference between the east and west in China.In the eastern part of China,an expected winter maximum in seasonal cycle is found because of the prominent anthropogenic activity and meteorological conditions.In the western part this cycle shows a NO2 maximum in summer time,which is attributed to natural emissions,especially soil emissions and lightning.A quickly increasing vehicle population may contribute to the increase of tropo-spheric NO2 over megacities in China for the remarkable correlation for vehicle population with tropospheric NO2.ZHANG XingYing ZHANG Peng ZHANG Yan LI XiaoJing QIU Hong 2007Science China Earth Sciences2007,50,12:30
5Cardiotoxicity of 5-fluorouracil and capecitabine in Chinese patients: a prospective study显示文摘Background:5-Fluorouracil(5-FU)and capecitabine-associated cardiotoxicity ranging from asymptomatic electro-cardiography(ECG)abnormalities to severe myocardial infarction has been reported in a number of studies,but such cardiotoxicity in Chinese patients with malignant diseases has not been investigated to date.In the present study,we aimed to prospectively evaluate the incidence rates and clinical manifestations of 5-FU-and capecitabine-associated cardiotoxicity in cancer patients recruited from multiple centers in China.Methods:Among the 527 patients who completed the study,196 received 5-FU-based chemotherapy and 331 received capecitabine-based chemotherapy as either first-line or adjuvant therapy.Adverse events were reported during the treatment and up to 28 days of follow-up.Outcome measures included ECG,myocardial enzymes,cardiac troponin,brain natriuretic peptide and echocardiography.Univariate analysis and logistic regression were performed for subgroup analysis and identification of significant independent variables that are associated with cardiotoxicity of both agents.Results:In total,161 of 527 patients(30.6%)experienced cardiotoxicity.The incidence rate of cardiotoxicity was 33.8%(112/331)in the capecitabine group,which was significantly higher than the rate of 25%(49/196)in the 5-FU group(P=0.0042).110/527 patients(20.9%)suffered arrhythmia,105/527(19.9%)developed ischemic changes,while only 20/527 patients(3.8%)presented heart failure and 6/527 patients(1.1%)had myocardial infarction.Pre-existing cardiac disease,hypertension,capecitabine-based chemotherapy and duration of treatment were identified as sig-nificant risk factors associated with cardiotoxicity.The odds ratio were 15.7(prior history of cardiac disease versus no history),1.86(capecitabine versus 5-FU),1.06(5-8 versus 1-4 chemotherapy cycles)and 1.58(hypertension versus no hypertension),respectively.Conclusions:Cardiotoxicity induced by fluoropyrimidines in the Chinese population may be underestimated in clini-cal practice.Close monitoring of patients is recommended,especially for those patients at high risk for cardiotoxicity.Possible risk factors are duration of treatment,capecitabine-based chemotherapy,pre-existing cardiac diseases and hypertension.Trial registration This study was initiated on January 22,2014 and has been retrospectively registered with the registra-tion number ChiCTR1800015434 .Jianjun Peng Chao Dong Chang Wang Weihua Li Hao Yu Min Zhang Qun Zhao Bo Zhu Jun Zhang Wenliang Li Fenghua Wang Qiong Wu Wenhao Zhou Ying Yuan Meng Qiu Gong Chen 2018Cancer Communications2018,38,1:23
6Gut microbial diversity analysis using Illumina sequencing for functional dyspepsia with liver depression-spleen deficiency syndrome and the interventional Xiaoyaosan in a rat model显示文摘AIM To investigate gut microbial diversity and the interventional effect of Xiaoyaosan(XYS) in a rat model of functional dyspepsia(FD) with liver depression-spleen deficiency syndrome. METHODS The FD with liver depression-spleen deficiency syndrome rat model was established through classic chronic mild unpredictable stimulation every day. XYS group rats received XYS 1 h before the stimulation. The models were assessed by parameters including state ofthe rat, weight, sucrose test result and open-field test result. After 3 wk, the stools of rats were collected and genomic DNA was extracted. PCR products of the V4 region of 16 S rD NA were sequenced using a barcoded Illumina paired-end sequencing technique. The primary composition of the microbiome in the stool samples was determined and analyzed by cluster analysis.RESULTS Rat models were successfully established, per data from rat state, weight and open-field test. The microbiomes contained 20 phyla from all samples. Firmicutes, Bacteroidetes, Proteobacteria, Cyanobacteria and Tenericutes were the most abundant taxonomic groups. The relative abundance of Firmicutes, Proteobacteria and Cyanobacteria in the model group was higher than that in the normal group. On the contrary, the relative abundance of Bacteroidetes in the model group was lower than that in the normal group. Upon XYS treatment, the relative abundance of all dysregulated phyla was restored to levels similar to those observed in the normal group. Abundance clustering heat map of phyla corroborated the taxonomic distribution. CONCLUSION The microbiome relative abundance of FD rats with liver depression-spleen deficiency syndrome was significantly different from the normal cohort. XYS intervention may effectively adjust the gut dysbacteriosis in FD.Juan-Juan Qiu Zhe Liu Peng Zhao Xue-Jun Wang Yu-Chun Li Hua Sui Lawrence Owusu Hui-Shu Guo Zheng-Xu Cai 2017World Journal of Gastroenterology2017,23,5:23
7Loss of heterozygosity on long arm of chromosome 22 in sporadic colorectal carcinoma显示文摘AIM: The loss of heterozygosity (LOH) on tumorsuppressor genes is believed to play a key role incarcinogenesis of colorectal cancer, In this study, weanalyzed the LOH at 5 loci on the long arm ofchromosome 22 in sporadic colorectal cancer to identifyadditional loci involved in colorectal tumorigenesis.METHODS: Five polymorphic microsatellite markerswere analyzed in 83 cases of colorectal and normal DNAby PCR. PCR products were eletrophoresed on an ABI377 DNA sequencer; Genescan 3.1 and Genotype 2.1software were used for LOH scanning and analysisComparison between LOH frequency andclinicopathological data were performed by x2 test. P<0.05 was considered as statistically significant.RESULTS: The average LOH frequency on chromosome22q was 28.38 %. The region between markersD22S280 and D22S274 (22q12.2-q13.33) exhibitedrelatively high LOH frequency. The two highest LOH lociwith frequencies of 35.09 % and 34.04 % wasidentified on D22S280 (22q12.2-12.3) and D22S274(22q13.32-13.33). 8 cases showed LOH at allinformative loci, suggesting that one chromosome 22qhad been completely lost. On D22S274 locus, LOHfrequency of rectal cancer was 50 % (9/18), which washigher than that of proximal colon cancer (12 %, 2/17) (P=0.018). The frequency of distal colon cancer was42 % (5/12), also higher than that of proximal coloncancer. But there was no statistical significance. Puttingboth the tumors in distal colon and rectum togetherinto consideration, the frequency, 47 % (14/30), washigher than that of proximal colon cancer (P=0.015),suggesting the mechanism of carcinogenisis wasdifferent in both groups.CONCLUSIONS: This study provided evidence for theinvolvement of putative tumor suppressor genes relatedto the sporadic colorectal carcinoma on chromosome22q. The tumor-suppressor-gene(s) might locate on the22q12.2-12.3 and/or 22q13.32-13.33.Chong-Zhi Zhou Zhi-Hai Peng Fang Zhang Guo-Qiang Qiu Department of General Surgery,Shanghai First People Hospital,Shanghai 200080,China Lin He Shanghai Institutes for Biological Science,Chinese Academy of Science,Shanghai 200031,China 2002World Journal of Gastroenterology2002,8,4:21
8Analysis of Dynamics and Driving Factors of Wetland Landscape in Zoige,Eastern Qinghai-Tibetan Plateau显示文摘Zoige Wetland is one of the largest plateau wetlands in the world.This paper provides a dynamic analysis of spatial and temporal patterns of the wetland in Zoige, Eastern Qinghai-Tibetan Plateau, supported by ERDAS8.7 and ArcGIS9.0.It is the first comparative analysis of a system of rapidly changing wetland with landscape patterns in Zoige, using 3 classified landsat Thematic Mapper images of 1977, 1994 and 2001.The classified images were used to generate wetland distributing maps, and shape index(S), diversity index(H), dominance index(D), evenness index(E), fragmentation index(F) and fractal dimension(Fd) were calculated and analyzed spatiotemporally across pure grazing area in Zoige for each landscape type and in different periods(before 1977, during 1977~1994 and 1994~2001), as well as the driving forces of natural and anthropogenic.The study shows that for a comprehensive understanding of the shapes and trajectories of the shrinking and desertificated land expansion of the wetland, a spatiotemporal landscape metrics analysis in different periods is an improvement than only with landscape changing rates.This type of analysis can also be used to infer underlying social, economic, and political processes that drive the observed wetland forms.The results indicate that wetland patterns can be changed over relatively short periods of time.Thetotal area of lake reduced by 164.86 km2,grassland extended by 141.74 km2,semi-marsh extended by 105.94 km2 , marsh reduced by 86.00 km2;the number of landscape patches reduced by 56, and their average area decreased by 2.68 km2;the successions within lake, marsh, semi-marsh and grassland were found obviously;S decreased stepwise;D and F increased but H decreased;The changing rate after 1994 was 2.3 to 2.9 times greater than that before.The change of the wetland landscape patterns resulted in the interaction between socio-economic and natural forces of positive and negative aspects;and natural factors affected as assistant aspect.Some important human activities in this period led to the change of the landscape patterns in this region directly.Some measurements made by government and NGO delayed the converting process partly.QIU Pengfei WU Ning LUO Peng WANG Zuyuan LI Maihe 2009Journal of Mountain Science2009,6,1:19
9Prognostic nutritional index is an independent prognostic factor for gastric cancer patients with peritoneal dissemination显示文摘Objective: The predictive and prognostic role of prognostic nutritional index(PNI) in gastric cancer patients with peritoneal dissemination remains unclear. This study aims to explore the role of the PNI in predicting outcomes of gastric cancer patients with peritoneal dissemination.Methods: A total of 660 patients diagnosed with gastric adenocarcinoma with peritoneal metastasis between January 2000 and April 2014 at Sun Yat-sen University Cancer Center and the Sixth Affiliated Hospital of Sun Yatsen University were retrospectively analyzed. The clinicopathologic characteristics and clinical outcomes of patients with peritoneal dissemination were analyzed.Results: Compared with PNI-high group, PNI-low group was correlated with advanced age(P=0.036), worse performance status(P<0.001), higher frequency of ascites(P<0.001) and higher frequency of multisite distant metastasis(P<0.001). Kaplan-Meier survival curves showed that PNI-high group had a significantly longer median overall survival than PNI-low group(13.13 vs. 9.03 months, P<0.001). Multivariate survival analysis revealed that Borrmann type IV(P=0.014), presence of ascites(P=0.017) and lower PNI(P=0.041) were independent poor prognostic factors, and palliative surgery(P<0.001) and first-line chemotherapy(P<0.001) were good prognostic factors. For patients receiving palliative surgery, the postoperative morbidity rates in the PNI-low group and PNIhigh group were 9.1% and 9.9%, respectively(P=0.797). The postoperative mortality rate was not significantly different between PNI-low and PNI-high groups(2.3% vs. 0.9%, P=0.362).Conclusions: PNI is a useful and practical tool for evaluating the nutritional status of gastric cancer patients with peritoneal dissemination, and is an independent prognostic factor for these patients.Runcong Nie Shuqiang Yuan Shi Chen Xiaojiang Chen Yongming Chen Baoyan Zhu Haibo Qiu Zhiwei Zhou Junsheng Peng Yingbo Chen 2016Chinese Journal of Cancer Research2016,28,6:19
10The presence of six cryptic species of the whitefly Bemisia tabaci complex in China as revealed by crossing experiments显示文摘最近的种系发生的分析使用 mitochondrial 细胞色素 oxidase (mtCOI ) 我 Bemisia 定序世界范围的 tabaci 显示 whitefly 包括至少 24 词法上难区分却遗传上不同的神秘种类。当繁殖隔离的证据为一些通常认为的种类被报导了时,更广泛的十字路口实验被要求澄清这种类建筑群的 systematics。在这研究,我们为 B 的六通常认为的种建立了实验室文化。在中国镇定的 tabaci。我们在六通常认为的种之中进行了 22 个内部种类的十字。以前报导的数据和那些被对照,并且联合数据集在六通常认为的种之中盖住所有 30 个可能的内部种类的十字。Intra 种类控制总是生产了女、男的子孙,在第一代(F1 ) 的女性的比例从 56% ~ 70%。然而,在内部种类的十字,女子孙很少被生产,并且很少 F1 女性在 30 个内部种类的十字中的四个生产了在生存能力无菌或显著地更弱。这些结果在他们是在 B 的六神秘的种的六通常认为的种和表演之中表明完全的繁殖隔离的一个模式。tabaci 建筑群。Peng Wang Di-Bing Sun Bao-Li Qiu Shu-Sheng Liu 2011Insect Science2011,18,1:18
11Collagen type Ⅱ suppresses articular chondrocyte hypertrophy and osteoarthritis progression by promoting integrin β1-SMAD1 interaction显示文摘Hypertrophic differentiation is not only the terminal process of endochondral ossification in the growth plate but is also an important pathological change in osteoarthritic cartilage.Collagen type II(COL2A1)was previously considered to be only a structural component of the cartilage matrix,but recently,it has been revealed to be an extracellular signaling molecule that can significantly suppress chondrocyte hypertrophy.However,the mechanisms by which COL2A1 regulates hypertrophic differentiation remain unclear.In our study,a Col2a1 p.Gly1170Ser mutant mouse model was constructed,and Col2a1 loss was demonstrated in homozygotes.Loss of Col2a1 was found to accelerate chondrocyte hypertrophy through the bone morphogenetic protein(BMP)-SMAD1 pathway.Upon interacting with COL2A1,integrinβ1(ITGB1),the major receptor for COL2A1,competed with BMP receptors for binding to SMAD1 and then inhibited SMAD1 activation and nuclear import.COL2A1 could also activate ITGB1-induced ERK1/2 phosphorylation and,through ERK1/2-SMAD1 interaction,it further repressed SMAD1 activation,thus inhibiting BMP-SMAD1-mediated chondrocyte hypertrophy.Moreover,COL2A1 expression was downregulated,while chondrocyte hypertrophic markers and BMP-SMAD1 signaling activity were upregulated in degenerative human articular cartilage.Our study reveals novel mechanisms for the inhibition of chondrocyte hypertrophy by COL2A1 and suggests that the degradation and decrease in COL2A1 might initiate and promote osteoarthritis progression.Chengjie Lian Xudong Wang Xianjian Qiu Zizhao Wu Bo Gao Lei Liu Guoyan Liang Hang Zhou Xiaoming Yang Yan Peng Anjing Liang Caixia Xu Dongsheng Huang Peiqiang Su 2019Bone Research2019,7,1:17
12Fuzzy Control of LED Tunnel Lighting and Energy Conservation显示文摘Current highway tunnel lighting control systems are often manually controlled,resulting in significant energy waste.This article designs a fuzzy control algorithm for tunnel lighting energy control systems.The system uses LED (Light Emitting Diode) lighting,so the fuzzy control algorithm is designed for LED lights.The traffic and the natural illumination level are used as parameters in the intelligent lighting control algorithm.This system has been deployed in the Lengshui tunnel on the 49th provincial highway of Zhejiang province and operated for more than six months.The performance results show that the energy conservation system provides sufficient lighting levels for traffic safety with significant energy conservation.Hong Zeng Jian Qiu Xingfa Shen Guojun Dai Peng Liu Shuping Le 2011Tsinghua Science and Technology2011,16,6:17
13Gastrodin prevents steroid-induced osteonecrosis of the femoral head in rats by anti-apoptosis显示文摘Zheng Huifeng Yang Erping Peng Hao Li Jianping Chen Sen Zhou Jianlin Fang Hongsong Qiu Bo Wang Zhe 2014Chinese Medical Journal2014,,22:17
14Recurrent gain-of-function USP8 mutations in Cushing's disease显示文摘库欣的疾病,引起过量皮质醇生产的也已知的同样促肾上腺皮质的荷尔蒙(ACTH )-secreting 垂体腺瘤(舞步) ,占多达 85%corticotrophin 依赖的库欣的症候群盒子。然而,在这疾病的基因改变是不清楚的。这里,我们执行了从 12 秘密 ACTH 舞步导出并且匹配血样品的 DNA 定序的 whole-exome,它在候选人基因揭示了体的变化的三种类型, USP8 (编码 ubiquitin 特定的朊酶 8 ) ,专门在 exon 14 在 12 秘密 ACTH 舞步中的 8 个。我们进一步评估了体的 USP8 变化在另外由定序的 Sanger 的 258 舞步。进一步定序指向在 108 秘密 ACTH 舞步(62.04%) 中的 67 个识别了 USP8 变体的 17 种类型的一个总数。然而,任何一个都没在舞步的另外的类型这些变化被检测(n = 150 ) 。这些变化在 USP8 的 14-3-3 绑定主题以内聚集并且破坏在 USP8 和 14-3-3 蛋白质之间的相互作用,导致保护 EGFR 免受 lysosomal 降级的伤害的一个提高的能力。因此,有 EGFR 表示,提高的 EGFR 蛋白质丰富和 mRNA 表示的更高的发生 POMC 铺平的变异的 USP8 显示的舞步,它编码 ACTH 的先锋。有变异的 USP8 的舞步在尺寸是显著地更小的并且比野类型的舞步有更高的 ACTH 生产。在里面通过手术 resected 主要变异 USP8 的肿瘤房间, USP8 击倒或堵住的 EGFR 有效地稀释 ACTH 分泌物。一起拿,体的 gain-of-function USP8 变化是普通的并且在库欣的疾病贡献 ACTH 生产过剩。USP8 或 EGFR 的抑制为对待变异 USP8 的 corticotrophin 腺瘤是有希望的。我们的学习在库欣的疾病加亮潜在地功能的变异的基因并且提供卓见进这疾病的治疗学。Zeng-Yi Ma Zhi-Jian Song Jian-Hua Chen Yong-Fei Wang Shi-Qi Li Liang-Fu Zhou Ying Mao Yi-Ming Li Rong-Gui Hu Zhao-Yun Zhang Hong-Ying Ye Ming Shen Xue-Fei Shou Zhi-Qiang Li Hong Peng Qing-Zhong Wang Dai-Zhan Zhou Xiao-Lan Qin Jue Ji Jie Zheng Hong Chen Yin Wang Dao-Ying Geng Wei-Jun Tang Chao-Wei Fu Zhi-Feng Shi Yi-Chao Zhang Zhao Ye Wen-Qiang He Qi-Lin Zhang Qi-Sheng Tang Rong Xie Jia-Wei Shen Zu-Jia Wen Juan Zhou Tao Wang Shan Huang Hui-Jia Qiu Ni-Dan Qiao Yi Zhang Li Pan Wei-Min Bao Ying-Chao Liu Chuan-Xin Huang Yong-Yong Shi Yao Zhao 2015Cell Research2015,25,3:16
15Renewed profile of the Mesozoic magmatism in Korean Peninsula: Regional correlation and broader implication for cratonic destruction in the North China Craton显示文摘Widespread Mesozoic magmatism occurs in the Korean Peninsula(KP). The status quo is poles apart between the northern and southern parts in characterizing its distribution and nature, with the nearly absence of any related information in North Korea. We have the opportunity to have conducted geological investigations in North Korea and South Korea during the past ten years through international cooperation programs. This led to the revelation of a number of granitoids and related volcanic rocks and thus facilitates the comparison with those in East China and Japan. Mesozoic granitoids in the KP can be divisible into three age groups: the Triassic group with a peak age of ~220 Ma, the Jurassic one of ~190–170 Ma and the late Early Cretaceous one of ~110 Ma. The Triassic intrusions include syenite, calc-alkaline to alkaline granite and minor kimberlite in the Pyeongnam Basin of North Korea. They have been considered to form in post-orogenic settings related to the Central Asian Orogenic Belt(CAOB) or the Dabie-Sulu Orogenic Belt(DSOB). The Jurassic granitoids constitute extensive occurrence in the KP and are termed as the Daebo-period magmatism. They correlate well with coeval counterparts in NE China encompassing the northeastern part of the North China Craton(NCC) and the eastern segment of the CAOB. They commonly consist of biotite or two-mica granites and granodiorites, with some containing small dark diorite enclaves. On one hand, Early Jurassic to early Middle Jurassic magmatic rocks are rare in most areas of the NCC, whilst Middle-Late Jurassic ones are not developed in the KP. On the other hand, both NCC and KP host abundant Cretaceous granites. However, the present data revealed contrasting age peaks, with ~130–125 Ma in the NCC and ~110–105 Ma in the KP. Cretaceous granites in the KP comprise the dominant biotite granites and a few amphibole granites. The former exhibit mildly fractionated REE patterns and zircon εHf(t) values from ?15 to ?25, whereas the latter feature strongly fractionated REE patterns and zircon εHf(t) values from ?10 to ?1. Both granites contain inherited zircons of ~1.8–1.9 or ~2.5 Ga. These geochemical characters testify to their derivation from re-melting distinct protoliths in ancient basement. Another Cretaceous magmatic sub-event has been entitled as the Gyeongsang volcanism, which is composed of bimodal calc-alkaline volcanic rocks of 94–55 Ma and granitic-hypabyssal granitic bodies of 72–70 Ma. Synthesizing the Mesozoic magmatic rocks across the KP, NCC and Japan can lead to the following highlights:(1) All Triassic granites in the NCC, KP and Japan have similar characteristics in petrology, chronology and geochemistry. Therefore, the NCC, KP and Japan tend to share the same tectonic setting during the Triassic, seemingly within the context of Indosinian orogensis.(2) Jurassic to earliest Cretaceous magmatic rocks in the NCC seem to define two episodes: episode A from 175 to 157 Ma and episode B from 157 to 135 Ma. Jurassic magmatic rocks in the KP span in age mainly from 190 to 170 Ma, whereas 160–135 Ma ones are rare. With the exception of ~197 Ma Funatsu granite, Jurassic magmatic rocks are absent in Japan.(3) Cretaceous granites in the KP have a peak age of ~110, ~20 Ma younger than those in the NCC, while Japan is exempt from ~130–100 Ma granites.(4) The spatial-temporal distribution and migratory characteristics of theJurassic-Cretaceous magmatic rocks in Japan, KP, and NE China-North China indicate that the subduction of the Paleo-Pacific plate might not be operative before Late Cretaceous(~130–120 Ma).(5) Late Cretaceous magmatic rocks(~90–60 Ma) occur in the southwestern corner of the KP and also in Japan, coinciding with the metamorphic age of ~90–70 Ma in the Sanbagawa metamorphic belt of Japan. The magmatic-metamorphic rock associations and their spatial distribution demonstrate the affinities of sequentially subduction zone, island arc and back-arc basin from Japan to Korea, arguing for the Pacific plate subduction during Late Cretaceous.(6) This study raises another possibility that the Mesozoic cratonic destruction in the NCC, which mainly occurred during ~150–120 Ma, might not only be due to the subduction of the Paleo-Pacific Plate, but also owe much to the intraplate geodynamic forces triggered by other adjacent continental plates like the Eurasian and Indian plates.ZHAI MingGuo ZHANG YanBin ZHANG XiaoHui WU Fu Yuan PENG Peng LI Qiu Li HOU QuanLin LI TieSheng ZHAO Lei 2016Science China(Information Sciences)2016,59,12:16
16Relationship between Fas/ FasL expression and apoptosis of colon adenocarcinoma cell lines显示文摘INTRODUCTIONFas/ FasL system has been identified as a keymediator of apoptosis in tumor cells[1-4]. Theoccurrence and development of neoplasm are closelyrelated to apoptosis[5-7] Most chemotherapeuticdrugs kill cancer cells mainly by inducingapoptosis[8-14].'Zhi Hai Peng Tong Hai Xing Guo Qiang Qiu Hua Mei Tang Shanghai No. 1 People’s Hospital, Shanghai 200080, China 2001World Journal of Gastroenterology2001,7,1:15
17MicroRNA-143 suppresses gastric cancer cell growth and induces apoptosis by targeting COX-2显示文摘AIM:To investigate the function of microRNA-143(miR-143)in gastric cancer and explore the target genes of miR-143.METHODS:A quantitative real-time reverse transcription-polymerase chain reaction(RT-PCR)analysis was performed to evaluate miR-143 expression in gastric cancer cell lines.After transfecting gastric cancer cells with miR-143-5p and miR-143-3p precursors,Alamar blue and apoptosis assays were used to measure the respective proliferation and apoptosis rates.Cyclooxygenase-2(COX-2)expression was determined by realtime RT-PCR and Western blot assays after miR-143transfection.Reporter plasmids were constructed,and a luciferase reporter assay was used to identify the miR-143 binding site on COX-2.RESULTS:Both miR-143-5p and miR-143-3p were significantly downregulated in multiple gastric cancer cell lines.Forced miR-143-5p and miR-143-3p expression in gastric cancer cells produced a profound cytotoxic effect.MiR-145-5p transfection into gastric cancer cells resulted in a greater growth inhibitory effect(61.23%±3.16%vs 46.58%±4.28%,P<0.05 in the MKN-1cell line)and a higher apoptosis rate(28.74%±1.93%vs 22.13%±3.31%,P<0.05 in the MKN-1 cell line)than miR-143-3p transfection.Further analysis indicated that COX-2 expression was potently suppressed by miR-143-5p but not by miR-143-3p.The activity of a luciferase reporter construct that contained the 3’-untranslated region(UTR)of COX-2 was downregulated by miR-143-5p(43.6%±4.86%,P<0.01)but not by miR-143-3p.A mutation in the miR-145-5p binding site completely ablated the regulatory effect on luciferase activity,which suggests that there is a direct miR-145-5p binding site in the 3’-UTR of COX-2.CONCLUSION:Both miR-143-5p and miR-143-3p function as anti-oncomirs in gastric cancer.However,miR-143-5p alone directly targets COX-2,and it exhibits a stronger tumor suppressive effect than miR-143-3p.Xiao-Li Wu Bin Cheng Pei-Yuan Li Huan-Jun Huang Qiu Zhao Zi-Li Dan Dean Tian Peng Zhang 2013World Journal of Gastroenterology2013,19,43:15
18Comparison of simple discectomy and instrumented posterior lumbar interbody fusion for treatment of lumbar disc herniation combined with Modic endplate changes显示文摘Cao Peng Chen Zhe Zheng Yuehuan Wang Yuren Jiang Leisheng Yang Yaoqi Zhuang Chengyu Liang Yu Zheng Tao Gong Yaocheng Zhang Xingkai Wu Wenjian Qiu Shijing 2014Chinese Medical Journal2014,,15:15
19Prognostic factors of primary gastrointestinal stromal tumors: a cohort study based on high-volume centers显示文摘Objective: We aimed to evaluate the clinicopathologic characteristics, immunohistochemical expression and prognostic factors of patients with primary gastrointestinal stromal tumors(GISTs).Methods: Data from 2,570 consecutive GIST patients from four medical centers in China(January2001–December 2015) were reviewed. Survival curves were constructed by the Kaplan-Meier method, and Cox regression models were used to identify independent prognostic factors.Results: Of the included patients, 1,375(53.5%) were male, and the patient age range was 18 to 95(median, 58)years. The tumors were mostly found in the stomach(64.5%), small intestine(25.1%) and colorectal region(5.1%).At the time of diagnosis, the median tumor size was 4.0(range: 0.1–55.0) cm, and the median mitotic index per 50 high power fields(HPFs) was 3(range: 0–254). Of the 2,168 resected patients, 2,009(92.7%) received curative resection. According to the modified National Institutes of Health(NIH) classification, 21.9%, 28.9%, 14.1% and35.1% were very low-, low-, intermediate-and high-risk tumors, respectively. The rate of positivity was 96.4% for c-Kit, 87.1% for CD34, 96.9% for delay of germination 1(DOG-1), 8.0% for S-100, 31.0% for smooth muscle actin(SMA) and 5.1% for desmin. However, the prognostic value of each was limited. Multivariate analysis showed that age, tumor size, mitotic index, tumor site, occurrence of curative resection and postoperative imatinib were independent prognostic factors. Furthermore, we found that high-risk patients benefited significantly from postoperative imatinib(P<0.001), whereas intermediate-risk patients did not(P=0.954).Conclusions: Age, tumor size, mitotic index, tumor site, occurrence of curative resection and postoperative imatinib were independent prognostic factors in patients with GISTs. Moreover, determining whether intermediate-risk patients can benefit from adjuvant imatinib would be of considerable interest in future studies.Xuechao Liu Haibo Qiu Peng Zhang Xingyu Feng Tao Chen Yong Li Kaixiong Tao Guoxin Li Xiaowei Sun Zhiwei Zhou 2018Chinese Journal of Cancer Research2018,30,1:14
20Increasing targeting scope of adenosine base editors in mouse and rat embryos through fusion of TadA deaminase with Cas9 variants显示文摘Lei Yang Xiaohui Zhang Liren Wang Shuming Yin Biyun Zhu Ling Xie Qiuhui Duan Huiqiong Hu Rui Zheng Yu Wei Liangyue Peng Honghui Han Jiqin Zhang Wenjuan Qiu Hongquan Geng Stefan Siwko Xueli Zhang Mingyao Liu Dali Li 2018Protein & Cell2018,9,9:13
返回顶部 每页显示:
共39页 首页 上一页 第1页 下一页 末页 /39 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