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1The Reference Genome of Tea Plant and Resequencing of 81 Diverse Accessions Provide Insights into Its Genome Evolution and Adaptation显示文摘Tea plant is an important economic crop,which is used to produce the world's oldest and most widely consumed tea beverages.Here,we present a high-quality reference genome assembly of the tea plant(Camellia sinensis var.sinensis)consisting of 15 pseudo-chromosomes.LTR retrotransposons(LTR-RTs)account for 70.38%of the genome,and we present evidence that LTR-RTS play critical roles in genome size expansion and the transcriptional diversification of tea plant genes through preferential insertion in promoter regions and introns.Genes,particularly those coding for terpene biosynthesis pro-teins,associated with tea aroma and stress resistance were significantly amplified through recent tandem duplications and exist as gene clusters in tea plant genome.Phylogenetic analysis of the sequences of 81 tea plant accessions with diverse origins revealed three well-differentiated tea plant populations,support-ing the proposition for the southwest origin of the Chinese cultivated tea plant and its later spread to western Asia through introduction.Domestication and modern breeding left significant signatures on hundreds of genes in the tea plant genome,particularly those associated with tea quality and stress resis-tance.The genomic sequences of the reported reference and resequenced tea plant accessions provide valuable resources for future functional genomics study and molecular breeding of improved cul-tivars of tea plants.Enhua Xia Wei Tong Yan Hou Yanlin An Linbo Chen Qiong Wu Yunlong Liu Jie Yu Fangdong Li Ruopei Li Penghui Li Huijuan Zhao Ruoheng Ge Jin Huang Ali Inayat Mallano Yanrui Zhang Shengrui Liu Weiwei Deng Chuankui Song Zhaoliang Zhang Jian Zhao Shu Wei Zhengzhu Zhang Tao Xia Chaoling Wei Xiaochun Wan 2020Molecular Plant2020,13,7:51
2Electroacupuncture improves learning and memory functions in a rat cerebral ischemia/reperfusion injury model through PI3K/Akt signaling pathway activation显示文摘Electroacupuncture has been widely used to treat cognitive impairment after cerebral ischemia,but the underlying mechanism has not yet been fully elucidated.Studies have shown that autophagy plays an important role in the formation and development of cognitive impairment,and the phosphoinositide 3-kinase(PI3K)/Akt signaling pathway plays an important role in autophagy regulation.To investigate the role played by the PI3K/Akt signaling pathway in the electroacupuncture treatment of cerebral ischemia/reperfusion rat models,we first established a rat model of cerebral ischemia/reperfusion through the occlusion of the middle cerebral artery using the suture method.Starting at 2 hours after modeling,electroacupuncture was delivered at the Shenting(GV24)and Baihui(GV20)acupoints,with a dilatational wave(1-20 Hz frequency,2 mA intensity,6 V peak voltage),for 30 minutes/day over 8 consecutive days.Our results showed that electroacupuncture reduced the infarct volume in a rat model of cerebral ischemia/reperfusion injury,increased the mRNA expression levels of the PI3K/Akt signaling pathwayrelated factors Beclin-1,mammalian target of rapamycin(mTOR),and PI3K,increased the protein expression levels of phosphorylated Akt,Beclin-1,PI3K,and mTOR in the ischemic cerebral cortex,and simultaneously reduced p53 mRNA and protein expression levels.In the Morris water maze test,the latency to find the hidden platform was significantly shortened among rats subjected to electroacupuncture stimulation compared with rats without electroacupuncture stimulation.In the spatial probe test,the number of times that a rat crossed the target quadrant was increased in rats subjected to electroacupuncture stimulation compared with rats without electroacupuncture stimulation.Electroacupuncture stimulation applied to the Shenting(GV24)and Baihui(GV20)acupoints activated the PI3K/Akt signaling pathway and improved rat learning and memory impairment.This study was approved by the Animal Ethics Committee of the First Affiliated Hospital of Henan University of Traditional Chinese Medicine,China(approval No.8150150901)on March 10,2016.Hui-Ling Wang Fei-Lai Liu Rui-Qing Li Ming-Yue Wan Jie-Ying Li Jing Shi Ming-Li Wu Jun-Hua Chen Wei-Juan Sun Hong-Xia Feng Wei Zhao Jin Huang Ren-Chao Liu Wen-Xue Hao Xiao-Dong Feng 2021Neural Regeneration Research2021,16,6:48
3Regulation of the cell cycle gene, BTG2, by miR-21 in human laryngeal carcinoma显示文摘MicroRNAs 是否定地在 post-transcriptional 水平调制基因表示的短规章的 RNA,并且深深地涉及癌症的几种类型的致病。调查特定的 miRNAs 和他们的目标基因是否参予喉的癌的分子的致病, oligonucleotide microarrays 被用来与正常纸巾相比在喉的癌纸巾估计 microRNAs 和 mRNAs 的微分表示侧面。oncogenic miRNA, microRNA-21 (miR-21 ) ,被发现是在喉的癌纸巾的 upregulated。由特定的 antisense oligonucleotides 的 miR-21 击倒而 miR-21 的 overexpression 提高了细胞的生长活动,由殖民地形成试金检测了,禁止了 HEp-2 细胞的增长潜力。miR-21 抑制引起的房间数字减小由于 G1-S 阶段转变的控制的损失,而不是 apoptosis 的显著增加。随后, miR-21 的新目标基因, BTG2,被发现是在喉的癌纸巾的 downregulated。BTG2 被知道充当一个平底锅房间周期管理者和肿瘤 suppressor。这些调查结果显示 miR-21 的那异常表情可以由维持 BTG2 的底层贡献喉的癌的恶意的显型。oncogenic miR-21 和它的目标基因的鉴定, BTG2,为癌症诊断和治疗在喉的癌是潜在地珍贵的。Min Liu Haidong Wu Tao Liu Yixuan Li Fang Wang Haiying Wan Xin Li Hua Tang 2009Cell Research2009,19,7:40
4Detrital zircon age model of Ordovician Wenquan quartzite south of Lungmuco-Shuanghu Suture in the Qiangtang area, Tibet: Constraint on tectonic affinity and source regions显示文摘Early to Middle Ordovician strata, including Wenquan quartzite, occur widely in the Himalaya, Lhasa, and south Qiangtang blocks. The Wenquan quartzite occurs on the south side of the Lungmuco-Shuanghu Suture in the Qiangtang area, Tibet. A total of 145 analyses on detrital zircons from the quartzite show five age ranges of 520-700, ca. 800, 900-1100, 1800-1900, and 2400-2500 Ma, with particularly distinct age peaks of 625 and 950 Ma. The reliable youngest detrital zircon age is 525 Ma, and the oldest, 3180 Ma. Detrital zircons show large variations in Hf isotope composition, with depleted mantle model ages t DM (Hf) ranging from 750 to 3786 Ma. Based on data obtained in this study and by others, the main conclusions are as follows: 1) Low-grade metamorphic sedimentary rocks are distributed extensively in the south of the Lungmuco-Shuanghu Suture and are Phanerozoic in age; 2) Pan-African and Grenville-Jinning tectono-thermal events were well developed in the source region of the Wenquan quartzite; 3) the source region shows crustal addition and recycling of different periods; 4) Wenquan quartzite was derived from the Gondwana metamorphic basement, suggesting that the Qiangtang block is a Gondwanan fragment.DONG ChunYan LI Cai WAN YuSheng WANG Wei WU YanWang XIE HangQiang LIU DunYi 2011Science China Earth Sciences2011,54,7:39
5Kappa coefficient: a popular measure of rater agreement显示文摘Wan TANG Jun HU HuiZHANG Pan WU Hua HE 2015上海精神医学2015,27,1:37
6Mechanism of the Spring Persistent Rains over southeastern China显示文摘The Spring Persistent Rains (SPR) in the areas to the south of middle and lower reaches of the Yangtze River or over southeastern China (SEC) is a unique synoptic and climatic phenomenon in East Asia. This study reveals a possible mechanism responsible for the climatic cause of SPR formation through climatic mean data analysis and sensitive numerical model experiments. SEC is located at the down-stream of the southwesterly velocity center (SWVC) which lies on the southeastern flank of the Tibetan Plateau (TP). As a result, there are strong southwesterly wind velocity convergence and moisture con-vergence over SEC. This is the immediate climatic cause of SPR formation. In spring, the seasonal evolution of the southwesterly velocity consists with the surface sensible heating over southeastern TP, indicating that the formation of SPR is related to not only the southwesterly wind of mechanical de-flected flow of TP, but also the southwesterly wind of thermal-forced cyclonic low circulation. Sensitive numerical experiments demonstrate that, without TP, both SWVC and the SPR rain belt will disappear. The southwesterly wind velocity increases almost linearly with the amount of the total diabatic heating with TP rising. Therefore, SWVC is the result of the mechanical forcing and thermal forcing of TP. All these strongly suggest that the presence of TP plays a primary role in the climatic formation of SPR.WAN RiJin1,2,3 & WU GuoXiong1 1 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Mechanicals (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China 2 Guangdong Climate and Agrometeorology Center, Guangzhou 510080, China 3 Shanghai Typhoon Institute of China Meterological Administration, Shanghai 200030, China 2007Science China Earth Sciences2007,50,1:34
7Adakitic rocks and destruction of the North China Craton:Evidence from experimental petrology and geochemistry显示文摘The general temporal-spatial consistency for the formation of adakitic rocks and lithospheric thinning in northern China provide a window to examine the processes and mechanism for the destruction of the North China Craton.With experimental petrology data,this paper demonstrates that the adakitic rocks in northern China are the products of partial melting of middle-to high-potassic metabasalts at the base of the lower continent crust.Based on the TiO2 solubility model,many adakitic rocks in Dabie,Jiaodong and the northern part of the craton appear to have been saturated with TiO2.This indicates the presence of a Ti-rich accessory phase in their source regions.This phase must be rutile based on the decreasing Nb/La with increasing La/Yb in the adakitic rocks.The adakitic magmas were,thus,derived from a depth of more than 50 km,based on pressures (higher than 1.5 GPa) for the stability of rutile in a metabasalt system.Because present-day crustal thickness is generally only 35 km,we suggest that the destruction of the North China Craton may have led to at least 15 km of thinning or delamination of the crust.XIONG XiaoLin LIU XingCheng ZHU ZhiMin LI Yuan XIAO Wan Sheng SONG MaoShuang ZHANG Sheng WU JinHua 2011Science China Earth Sciences2011,54,6:34
8cMyc-mediated activation of serine biosynthesis pathway is critical for cancer progression under nutrient deprivation conditions显示文摘癌症房间被知道经历新陈代谢的 reprogramming 然而,支撑幸存和快速的增长 oncogenic 损害怎么在各种各样的强调条件下面协调新陈代谢的开关,尚待充分被阐明。这里,我们显示出葡萄糖或夫酸安的那剥夺,为癌症房间的二主要营养来源,被伴随由的戏剧性地激活的丝氨酸生合成小径(SSP ) 提高了 cMyc 表示。我们进一步鉴别那 cMyc 刺激了 SSP 激活由 transcriptionally 多重 SSP 酶的 upregulating 表示。而且,我们证明 cMyc 便于的 SSP 激活导致了提高的谷胱甘肽(GSH ) 生产,房间周期前进和 nucleic 酸合成,它在剥夺营养素的条件下面特别为房间幸存和增长是必要的。我们进一步揭开了那 phosphoserine 磷酸酶( PSPH ), SSP 小径的最后的限制率的酶,在 vitro 并且在 vivo 为 驾驶cMyc 的癌症前进是批评的,并且重要地, PSPH 的异常表示高度在 hepatocellular 与死亡被相关癌( HCC )病人,一般来说建议在这 调整cMyc 的酶,或 SSP 激活之间的一种潜在的原因的关系,并且癌症开发。一起拿,我们的结果表明 cMyc 的那异常表情导致提高的 SSP 激活,新陈代谢的开关的必要部分,在剥夺营养素的条件下面便于癌症前进。Linchong Sun Libing Song Qianfen Wan Gongwei Wu Xinghua Li Yinghui Wang Jin Wang Zhaoji Liu Xiuying Zhong Xiaoping He Shengqi Shen Xin Pan Ailing Li Yulan Wang Ping Gao Huiru Tang Huafeng Zhang 2015Cell Research2015,25,4:33
9Paeonol inhibits tumor growth in gastric cancer in vitro and in vivo显示文摘AIM:To investigate the anti-tumor effects of paeonol in gastric cancer cell proliferation and apoptosis in vitro and in vivo.METHODS:Murine gastric cancer cell line mouse forestomach carcinoma(MFC) or human gastric cancer cell line SGC-7901 was cultured in the presence or absence of paeonol.Cell proliferation was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay,and cell cycle and apoptosis by flow cytometry and TUNEL staining.Tumor growth after subcutaneous implantation of MFC cells in mice was monitored,and the effects of treatment with paeonol were determined.RESULTS:In vitro,paeonol caused dose-dependent inhibition on cell proliferation and induced apoptosis.Cell cycle analysis revealed a decreased proportion of cells in G0/G1 phase,with arrest at S.Paeonol treatment in gastric cancer cell line MFC and SGC-790 cells significantly reduced the expression of Bcl-2 and increased the expression of Bax in a concentration-related manner.Administration of paeonol to MFC tumor-bearing mice significantly lowered the tumor growth and caused tumor regression.CONCLUSION:Paeonol has signif icantly growth-inhibitory and apoptosis-inducing effects in gastric cancer cells both in vitro and in vivo.Na Li Lu-Lu Fan Guo-Ping Sun Xin-An Wan Zhang-Gui Wang Qiang Wu Hua Wang 2010World Journal of Gastroenterology2010,16,35:27
10Oxymatrine liposome attenuates hepatic fibrosis via targeting hepatic stellate cells显示文摘AIM:To investigate the potential mechanism of ArgGly-Asp(RGD) peptide-labeled liposome loading oxymatrine(OM) therapy in CCl 4-induced hepatic fibrosis in rats.METHODS:We constructed a rat model of CCl 4 induced hepatic fibrosis and treated the rats with different formulations of OM.To evaluate the antifibrotic effect of OM,we detected levels of alkaline phosphatase,hepatic histopathology(hematoxylin and eosin stain and Masson staining) and fibrosis-related gene expression of matrix metallopeptidase(MMP)-2,tissue inhibitor of metalloproteinase(TIMP)-1 as well as type Ⅰ procollagen via quantitative real-time polymerase chain reaction.To detect cell viability and apoptosis of hepatic stellate cells(HSCs),we performed 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-diphenytetrazoliumromide assay and flow cytometry.To reinforce the combination of oxymatrine with HSCs,we constructed fluorescein-isothiocyanate-conjugated Arg-Gly-Asp peptide-labeled liposomes loading OM,and its targeting of HSCs was examined by fluorescent microscopy.RESULTS:OM attenuated CCl 4-induced hepatic fibrosis,as defined by reducing serum alkaline phosphatase(344.47 ± 27.52 U/L vs 550.69 ± 43.78 U/L,P < 0.05),attenuating liver injury and improving collagen deposits(2.36% ± 0.09% vs 7.70% ± 0.60%,P < 0.05) and downregulating fibrosis-related gene expression,that is,MMP-2,TIMP-1 and type Ⅰ procollagen(P < 0.05).OM inhibited cell viability and induced apoptosis of HSCs in vitro.RGD promoted OM targeting of HSCs and enhanced the therapeutic effect of OM in terms of serum alkaline phosphatase(272.51 ± 19.55 U/L vs 344.47 ± 27.52 U/L,P < 0.05),liver injury,collagen deposits(0.26% ± 0.09% vs 2.36% ± 0.09%,P < 0.05) and downregulating fibrosis-related gene expression,that is,MMP-2,TIMP-1 and type Ⅰ procollagen(P < 0.05).Moreover,in vitro assay demonstrated that RGD enhanced the effect of OM on HSC viability and apoptosis.CONCLUSION:OM attenuated hepatic fibrosis by inhibiting viability and inducing apoptosis of HSCs.The RGD-labeled formulation enhanced the targeting efficiency for HSCs and the therapeutic effect.Ning-Li Chai Qiang Fu Hui Shi Chang-Hao Cai Jun Wan Shi-Ping Xu Ben-Yan Wu 2012World Journal of Gastroenterology2012,18,31:27
11Identification of a Stable Quantitative Trait Locus for Percentage Grains with White Chalkiness in Rice (Oryza sativa)显示文摘High chalkiness is a major problem in many rice-producing areas of the world, especially in hybrid rice (Oryza sativa L.) in China. We previously showed a major quantitative trait locus for the percentage of grains with white chalkiness (QTLqPGWC-8) in the interval G1149-R727 on chromosome 8 using a chromosome segment substitution line (CSSL). Here, we selected the line-CSSL50 harboring the QTLqPGWC-8 allele from the CSSLs derived from a cross between Asominori (as a recurrent parent) and IR24 (as a donor parent), which had higher percentage chalkiness, markedly different from that of Asominori. There were also significant differences in starch granules, appearance of amylose content (AAC) and milling qualities between Asominori and CSSL50, but not in grain size or thousand grain weight (TGW). The BC4F2 and BC4F3 populations from a cross between CSSL50 and Asominori were used for fine mapping of qPGWC-8. We narrowed down the location of this QTL to a 142 kb region between Indel markers 8G-7 and 8G-9. QTLqPGWC-8 accounted for 50.9% of the difference in PGWC between the parents. The markers tightly linked to qPGWC-8 should facilitate cloning of the gene underlying this QTL and will be of value for marker-assisted selection in breeding rice varieties with better grain quality.Tao Guo Xiaolu Liu Xiangyuan Wan Jianfeng Weng Shijia Liu Xi Liu Mingjiang Chen Jingjing Li Ning Su Fuqing Wu Zhijun Cheng Xiuping Guo Cailin Lei Jiulin Wang Ling jiang Jianmin Wan 2011Journal of Integrative Plant Biology2011,53,8:25
12Acute kidney injury in acute-on-chronic liver failure is different from in decompensated cirrhosis显示文摘AIM To evaluate the differences in acute kidney injury(AKI) between acute-on-chronic liver failure(ACLF) and decompensated cirrhosis(DC) patients. METHODS During the period from December 2015 to July 2017, 280 patients with hepatitis B virus(HBV)-related ACLF(HBV-ACLF) and 132 patients with HBV-related DC(HBV-DC) who were admitted to our center were recruited consecutively into an observational study. Urine specimens were collected from all subjects and the levels of five urinary tubular injury biomarkers were detected,including neutrophil gelatinase-associated lipocalin(NGAL), interleukin-18(IL-18), liver-type fatty acid binding protein(L-FABP), cystatin C(CysC), and kidney injury molecule-1(KIM-1). Simultaneously, the patient demographics, occurrence and progression of AKI, and response to terlipressin therapy were recorded. All patients were followed up for 3 mo or until death after enrollment. RESULTS AKI occurred in 71 and 28 of HBV-ACLF and HBV-DC patients, respectively(25.4% vs 21.2%, P = 0.358). Among all patients, the levels of four urinary biomarkers(NGAL, CysC, L-FABP, IL-18) were significantly elevated in patients with HBV-ACLF and AKI(ACLF-AKI), compared with that in patients with HBV-DC and AKI(DC-AKI) or those without AKI. There was a higher proportion of patients with AKI progression in ACLF-AKI patients than in DC-AKI patients(49.3% vs 17.9%, P = 0.013). Fortythree patients with ACLF-AKI and 19 patients with DC-AKI were treated with terlipressin. The response rate of ACLFAKI patients was significantly lower than that of patients with DC-AKI(32.6% vs 57.9%, P = 0.018). Furthermore, patients with ACLF-AKI had the lowest 90 d survival rates among all groups(P < 0.001).CONCLUSION AKI in ACLF patients is more likely associated with structural kidney injury, and is more progressive, with a poorer response to terlipressin treatment and a worse prognosis than that in DC patients.Qun-Qun Jiang Mei-Fang Han Ke Ma Guang Chen Xiao-Yang Wan Semvua Bukheti Kilonzo Wen-Yu Wu Yong-Li Wang Jie You Qin Ning 2018World Journal of Gastroenterology2018,24,21:25
13Maize Genic Male-Sterility Genes and Their Applications in Hybrid Breeding: Progress and Perspectives显示文摘As one of the most important crops, maize not only has been a source of the food, feed, and industrial feedstock for biofuel and bioproducts, but also became a model plant system for addressing fundamental questions in genetics. Male sterility is a very useful trait for hybrid vigor utilization and hybrid seed production. The identification and characterization of genic male-sterility (GMS) genes in maize and other plants have deepened our understanding of the molecular mechanisms controlling anther and pollen development, and enabled the development and efficient use of many biotechnology-based male-sterility (BMS) systems for crop hybrid breeding. In this review, we summarize main advances on the identification and characterization of GMS genes in maize, and con struct a putative regulatory network controlling maize anther and pollen development by comparative genomic analysis of GMS genes in maize, Arabidopsis, and rice. Furthermore, we discuss and appraise the features of more than a dozen BMS systems for propagating male-sterile lines and producing hybrid seeds in maize and other plants. Finally, we provide our perspectives on the studies of GMS genes and the development of novel BMS systems in maize and other plants. The continuous exploration of GMS genes and BMS systems will enhance our understanding of molecular regulatory networks controlling male fertility and greatly facilitate hybrid vigor utilization in breeding and field production of maize and other crops.Xiangyuan Wan Suowei Wu Ziwen Li Zhenying Dong Xueli An Biao Ma Youhui Tian Jinping Li 2019Molecular Plant2019,12,3:24
14Hes1,an important gene for activation of hepatic stellate cells,is regulated by Notch1 and TGF-β/BMP signaling显示文摘AIM:To determine the role of Notch1 and Hes1 in regulating the activation of hepatic stellate cells(HSCs) and whether Hes1 is regulated by transforming growth factor(TGF)/bone morphogenetic protein(BMP) signaling.METHODS:Immunofluorescence staining was used to detect the expression of desmin,glial fibrillary acidic protein and the myofibroblastic marker α-smooth muscle actin(α-SMA) after freshly isolated,normal rat HSCs had been activated in culture for different numbers of days(0,1,3,7 and 10 d).The expression of α-SMA,collagen1α2(COL1α2),Notch receptors(Notch1-4),and the Notch target genes Hes1 and Hey1 were analyzed by reverse transcriptase-polymerase chain reaction.Luciferase reporter assays and Western blot were used to study the regulation of α-SMA,COL1α1,COL1α2 and Hes1 by NICD1,Hes1,CA-ALK3,and CA-ALK5 in HSC-T6 cells.Moreover,the effects of inhibiting Hes1 function in HSC-T6 cells using a Hes1 decoy were also investigated.RESULTS:The expression of Notch1 and Hes1 m RNAs was significantly down-regulated during the culture of freshly isolated HSCs.In HSC-T6 cells,Notch1 inhibited the promoter activities of α-SMA,COL1α1 and COL1α2.On the other hand,Hes1 enhanced the promoter activities of α-SMA and COL1α2,and this effect could be blocked by inhibiting Hes1 function with a Hes1 decoy.Furthermore,co-transfection of pc DNA3-CAALK3(BMP signaling activin receptor-like kinase 3) and pc DNA3.1-NICD1 further increased the expression of Hes1 compared with transfection of either vector alone in HSC-T6 cells,while pc DNA3-CA-ALK5(TGF-β signaling activin receptor-like kinase 5) reduced the effect of NICD1 on Hes1 expression.CONCLUSION:Selective interruption of Hes1 or maintenance of Hes1 at a reasonable level decreases the promoter activities of α-SMA and COL1α2,and these conditions may provide an anti-fibrotic strategy against hepatic fibrosis.Kai Zhang Yan-Qiong Zhang Wen-Bing Ai Qing-Ting Hu Qiao-Juan Zhang Lin-Yan Wan Xiao-Lian Wang Chang-Bai Liu Jiang-Feng Wu 2015World Journal of Gastroenterology2015,21,3:23
15Ratios of T-helper 2 Cells to T-helper 1 Cells and Cytokine Levels in Patients with Hepatitis B显示文摘Ming-Hui Li Dan Zhang Lu Zhang Xiao-Jing Qu Yao Lu Ge Shen Shu-Ling Wu Min Chang Ru-Yu Liu Lei-Ping Hu Hong-Xiao Hao Wen-Hao Hua Shu-Jing Song Gang Wan Shun-Ai Liu Yao Xie 2017Chinese Medical Journal2017,,15:21
16Cyclical one-way continental rupture-drift in the Tethyan evolution: Subduction-driven plate tectonics显示文摘Numerous continents have rifted and drifted away from Gondwana to repeatedly open ocean basins over the past-500 millionyears.These Gondwana-derived continents drifted towards and collided with components of the Eurasian continent to successively close the preexisting oceans between the two.Plate tectonics satisfactorily describes the continental drift from Gondwana to Eurasia but does not define the geodynamic mechanism of continuously rifting to collisions of continents in the Tethy an Realm.After reappraisal of geological records of the rift,collision and subduction initiation from the surface and various geophysical observations from depth,we propose that Eurasia-directed subducting oceanic slabs would have driven Tethyan system in the Phanerozoic.The Eurasia-directed subduction would have dragged the passive Gondwana margin to rift and drift northwards,giving birth to new oceans since the Paleozoic.The closure of preexisting oceans between the Gondwana-derived continents and Eurasia led to continental collisions,which would have induced the initiation of oceanic subduction in the Tethyan Realm.Multiple episodic switches between collision-subduction-rift repeatedly led to the separation of continental fragments from Gondwana and dragged them to drift towards Eurasia.The final disappearance of Neo-Tethy s would have induced collision of the Gondwana-derived continents with the Eurasian continent,giving rise to the Cenozoic Alpine-Zagros-Himalayan collisional system.Therefore,the Eurasia-directed oceanic subduction would have acted as a’one-way train’that successively transferred the ruptured Gondwana continental fragments in the south,into the terminal in the north.In this regard,the engine of this'Tethyan one-way train'is the negative buoyancy of subducting oceanic slabs.Bo WAN Fuyuan WU Ling CHEN Liang ZHAO Xiaofeng LIANG Wenjiao XIAO Rixiang ZHU 2019Science China Earth Sciences2019,62,12:21
17Clinical features and treatment status of hemifacial spasm in China显示文摘Wang Lin Hu Xingyue Dong Hongjuan Wang Wenzhao Huang Yue Jin Lingjing Luo Yumin Zhang Weixi Lian Yajun Liang Zhanhua Shang Huifang Feng Yabo wu Yiwen Chen Jun Luo Weifeng Wan Xinhua 2014Chinese Medical Journal2014,,5:20
18Degradation of pyrene by immobilized microorganisms in saline-alkaline soil显示文摘Biodegradation of polycyclic aromatic hydrocarbons(PAHs) is very difficult in saline-alkaline soil due to the inhibition of microbial growth under saline-alkaline stress.The microorganisms that can most effectively degrade PAHs were screened by introducing microorganisms immobilized on farm byproducts and assessing the validity of the immobilizing technique for PAHs degradation in pyrene-contaminated saline-alkaline soil.Among the microorganisms examined,it was found that Mycobacterium sp.B2 is the best,and can degrade 82.2% and 83.2% of pyrene for free and immobilized cells after 30 days of incubation.The immobilization technique could increase the degradation of pyrene significantly,especially for fungi.The degradation of pyrene by the immobilized microorganisms Mucor sp.F2,fungal consortium MF and co-cultures of MB+MF was increased by 161.7%(P < 0.05),60.1%(P < 0.05) and 59.6%(P < 0.05) after 30 days,respectively,when compared with free F2,MF and MB+MF.Scanning electron micrographs of the immobilized microstructure proved the positive effects of the immobilized microbial technique on pyrene remediation in salinealkaline soil,as the interspace of the carrier material structure was relatively large,providing enough space for cell growth.Co-cultures of different bacterial and fungal species showed different abilities to degrade PAHs.The present study suggests that Mycobacterium sp.B2 can be employed for in situ bioremediation of PAHs in saline-alkaline soil,and immobilization of fungi on farm byproducts and nutrients as carriers will enhance fungus PAH-degradation ability in saline-alkaline soil.Shanxian Wang Xiaojun Li Wan Liu Peijun Li Lingxue Kong Wenjie Ren Haiyan Wu Ying Tu 2012Journal of Environmental Sciences2012,24,9:19
19Geological and chronological evidence of Indo-Chinese strike-slip movement in the Altyn Tagh fault zone显示文摘A set of granitic and amphibole mylonite are exposed in the Altyn Tagh fault zone. The preliminary study shows that these rocks are the product of the syntectonic anatexis in the process of the left-lat- eral strike-slip shear, and are the result of the ductile transpression. There are two types of zircon sorted from the mylonite formed with syn-shear anatexis. Among them, one is the anatectic long co-lumnar zircon and another is the residual metamorphic sub-rounded columnar zircon. Two groups of age for single zircon measured by ion microprobe (SHRIMP) are obtained: one is 461-547 Ma for the sub-rounded columnar residual metamorphic zircon, and the other is 239-244 Ma for the long-columnar anatectic zircon. This type of zircon is direc-tionally spread in rock, and the long axis direction of its crystal is identical to that of stretching lineation, represent-ing the direction of tectonic stress in the process of the strike-slip. 40Ar-39Ar age of the directional growth horn-blende in the same myloniteLI Haibing YANG Jingsui XU Zhiqin WU Cailai WAN Yusheng SHI Rendeng Juhn G.Liou P.Tapponnier Trevor R.Ireland 2002Chinese Science Bulletin2002,47,1:18
20Ginkgo biloba extract suppresses hypertrophy and extracellular matrix accumulation in rat mesangial cells显示文摘瞄准:在 mesangial 房间在 mesangial 房间的肥大和细胞外的矩阵(ECM ) 的累积上观察白果树 biloba 摘录(EGb ) 的效果。方法:有教养的 mesangial 房间被分派进 7 个组:正常的组,溶剂控制组,高葡萄糖组, EGb 的低剂量组织, EGb 组,的中等剂量高 EGb 组开,并且 captopril 组织。房间 antioxidases, S 阶段百分比和 G (0 ) 的活动 /G (1 ) 阶段百分比,骨胶原 IV 和 laminin, Smad2/3 和 Smad7, TGF 贝它(1 ) mRNA 被不同方法测量。结果:为对待 EGb 的组,当与高度相比葡萄糖组织时, S 阶段的房间百分比被提起, G (0 )/G (1 ) 的百分比被降低。氧化应力的紧张被削弱。Smad2/3 的表示极大地被减少, Smad7 被增加。骨胶原 IV, laminin 和 TGF- 贝它(1 ) mRNA 也被减少。结论:EGb 能在老鼠 mesangial 房间压制房间肥大和 ECM 的累积,它意味着它能在糖尿病的肾病在肾小球硬化症的延期起一个重要作用。Jian-yun WANG Xiao-xing YIN Yun-ming WU Dao-quan TANG Yuan-yuan GAO Mei-rong WAN Xiao-yu HOU Bei ZHANG 2006Acta Pharmacologica Sinica2006,27,9:18
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