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23篇 您的检索式:作者名="Xianjun Peng"
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1A Chromosome-Scale Genome Assembly of Paper Mulberry(Bmussonetia papyrifera)Provides New Insights into Its Forage and Papermaking Usage显示文摘Paper mulberry(Broussonetia papyrifera)is a well-known woody tree historically used for Cai Lun papermaking,one of the four great inventions of ancient China.More recently,Paper mulberry has also been used as forage to address the shortage of feedstuff because of its digestible crude fiber and high protein contents.In this study,we obtained a chromosome-scale genome assembly for Paper mulberry using integrated approaches,including Illumina and PacBio sequencing platform as well as Hi-C,optical,and genetic maps.The assembled Paper mulberry genome consists of 386.83 Mb,which is close to the estimated size,and 99.25%(383.93 Mb)of the assembly was assigned to 13 pseudochromosomes.Comparative genomic analysis revealed the expansion and contraction in the flavonoid and lignin biosynthetic gene families,respectively,accounting for the enhanced flavonoid and decreased lignin biosynthesis in Paper mulberry.Moreover,the increased ratio of syringyl-lignin to guaiacyl-lignin in Paper mulberry underscores its suitability for use in medicine,forage,papermaking,and barkcloth making.We also identified the rootassociated microbiota of Paper mulberry and found that Pseudomonas and Rhizobia were enriched in its roots and may provide the source of nitrogen for its stems and leaves via symbiotic nitrogen fixation.Collectively,these results suggest that Paper mulberry might have undergone adaptive evolution and recruited nitrogen-fixing microbes to promote growth by enhancing flavonoid production and altering lignin monomer composition.Our study provides significant insights into genetic basis of the usefulness of Paper mulberry in papermaking and barkcloth making,and as forage.These insights will facilitate further domestication and selection as well as industrial utilization of Paper mulberry worldwide.Xianjun Peng Hui Liu Peilin Chen Feng Tang Yanmin Hu Fenfen Wang Zhi Pi Meiling Zhao Naizhi Chen Hui Chen Xiaokang Zhang Xueqing Yan Min Liu Xiaojun Fu Guofeng Zhao Pu Yao Lili Wang He Dai Xuming Li Wei Xiong Wencai Xu Hongkun Zheng Haiyan Yu Shihua Shen 2019Molecular Plant2019,12,5:18
2Patterns of DNA cytosine methylation between haploids and corresponding diploids in rice显示文摘Eighteen pairs of diploid-haploid twin-seedlings were identified and screened out fromspecial rice SARII-628 population. Five pairs of themwere selected and randomly designated as A, B, C, Dand E. Simple sequence repeats (SSR) analysisshowed that there was no difference among 310 siteswhich indicated that there was no base mutation onDNA primary structure. DNA methylation plays animportant role in gene expression regulation duringgrowth and development stages in eukaryotes. Amodified AFLP technique (methylation-sensitiveAFLP, MSAP) was employed to detect the DNA me-thylation patterns in the 5′-CCGG sites of the fivepairs of twin-seedlings. Although no methylationmutation was detected among the five diploids,forty-three methylation mutation sites were foundfrom the corresponding haploids. The MSAP ratios,which were the ratios of MSAP sites to the total am-plified sites, in five haploids were 18.79%, 19.35%,18.49%, 18.45% and 18.75%, respectively. And cor-responding full methylation levels (5′-CmCGG indouble strands) of those haploids were 10.58%,11.3%, 10.11%, 10.09% and 10.34%, respectively.Both MSAP and full methylation levels in the fivehaploids were higher than that of their correspondingdiploids, which suggested that hypermethylation oc-curred in some 5′-CCGG sites. Five types of MASPpatterns among the five pairs of twin-seedlings weredetected as follows: (1) no changes, methylation lev-els were the same in both haploids and diploids; (2) demethylation, diploid was methylated but no me-thylation in the same site in haploid; (3) hypermethy-lation, the methylation level in haploid was higher than those in diploid; (4) hypomethylation, methyla-tion in haploid was lower than those in diploid; (5) undecided pattern, change trend of methylation lev-els in haploids was not decided. The bands of 18 sites were reclaimed, then sequenced and searched on website to determine the sites of those sequences on rice chromosomes. The result showed that the methylation mutation involved the whole rice genome and 12 pairs of chromosomes. The mutation was site-related and there were different mutation sites for different haploids. Compared to diploids, the higher methylation level in haploids might be a readjusting reaction to the decrease in ploidy for the sake of sur-vival.ZHANG Hongyu PENG Hai LI Yun XU Peizhou WANG Xudong WU Xianjun 2006Chinese Science Bulletin2006,51,14:15
3Dual effects of spatial updating in both real and virtual environments显示文摘When people move around in their environment, spatial updating, which is an automatic cognitive process, is essential to ensuring people can keep track of their relations between them and the surrounding objects, and to 'recalculating' the relative position and orientation of those objects with regard to the current position of the persons. Despite the facilitating effect of spatial updating to people's mental representation in most circumstances as demonstrated in most of the existing literature, the effect sometimes can be adversarial. For instance, some research suggested that even though people were asked to ignore their locomotion, it is difficult to suppress updating of the spatial representation during movement. The current two studies were conducted to systematically investigate the dual effects of spatial updating in both real and virtual environments. We used a typical spatial updating paradigm to explore the effects of scene familiarity (familiar vs. novel) and person's locomotion (stationary vs. moving) on change detection accuracy (target object moved or not). The results indicated a facilitating effect of spatial updating in the novel scene condition, but an adversarial effect in the familiar scene condition-the dual effects, in both real and virtual environments.LIU ShuQing ZHENG XianJun Sam LIU XianYun PENG KaiPing 2013Chinese Science Bulletin2013,58,8:2
4QTL-Seq Identified a Major QTL for Grain Length and Weight in Rice Using Near Isogenic F_2 Population显示文摘Mapping and isolation of quantitative trait loci(QTLs)or genes controlling grain size or weight is very important to uncover the molecular mechanisms of seed development and crop breeding.To identify the QTLs controlling grain size and weight,we developed a near isogenic line F_2(NIL-F_2)population,which was derived from a residual heterozygous plant in an F_7 generation of recombinant inbred line(RIL).With the completion of more than 30×whole genome re-sequencing of the parents,two DNA bulks for large and small grains,a total of 58.94 Gb clean nucleotide data were generated.A total of455 262 single nucleotide polymorphisms(SNPs)between the parents were identified to perform bulked QTL-seq.A candidate genomic region containing SNPs strongly associated with grain length and weight was identified from 15 to 20 Mb on chromosome 5.We designated the major QTL in the candidate region as q TGW5.3.Then,q TGW5.3 was further validated with PCR-based conventional QTL mapping method through developing simple sequence repeat and Insertion/Deletion markers in the F_2 population.Furthermore,recombinants and the progeny tests delimited the candidate region of q TGW5.3 to 1.13 Mb,flanked by HX5009(15.15 Mb)and HX5003(16.28 Mb).A set of NILs,selected from the F_2 population,was developed to evaluate the genetic effect of q TGW5.3.Significant QTL effects were detected on grain length,grain width and 1000-grain weight of H12-29 allele with 1.14 mm,-0.11 mm and 3.11 g,which explained 99.64%,95.51%and 97.32%of the phenotypic variations,respectively.QIN Yaobin CHENG Peng CHENG Yichen FENG Yue HUANG Derun HUANG Tingxu SONG Xianjun YING Jiezheng 2018Rice science2018,25,3:2
5Floralozone protects endothelial function in atherosclerosis by ameliorating NHE1显示文摘Endothelial dysfunction is the pathological basis of atherosclerosis.Incomplete understanding of endothelial dysfunction etiology has impeded drug development for this devastating disease despite the currently available therapies.Floralozone,an aroma flavor,specifically exists in rabbit ear grass.Recently,floralozone has been demonstrated to inhibit atherosclerosis,but the underlying mechanisms are undefined.The present study was undertaken to explore whether floralozone pharmacologically targets endothelial dysfunction and therefore exerts therapeutic effects on atherosclerosis.The Na+/H+exchanger 1(NHE1),a channel protein,plays a vital role in atherosclerosis.Whether NHE1 is involved in the therapeutic effects of floralozone on endothelial dysfunction has yet to be further answered.By performing oil red staining and hematoxylin–eosin staining,vascular functional study,and oxidative stress monitoring,we found that floralozone not only reduced the size of carotid atherosclerotic plaque but also prevented endothelial dysfunction in atherosclerotic rats.NHE1 expression was upregulated in the inner membrane of carotid arteries and H2O2-induced primary rat aortic endothelial cells.Inspiringly,floralozone prevented the upregulation of NHE1 in vivo and in vitro.Notably,the administration of NHE1 activator LiCl significantly weakened the protective effect of floralozone on endothelial dysfunction in vivo and in vitro.Our study demonstrated that floralozone exerted its protective effect on endothelial dysfunction in atherosclerosis by ameliorating NHE1.NHE1 maybe a drug target for the treatment of atherosclerosis,and floralozone may be an effective drug to meet the urgent needs of atherosclerosis patients by dampening NHE1.Ning Huang Yue Qiu Yanhua Liu Tianheng Liu Xianjun Xue Ping Song Jian Xu Yutian Fu Ruili Sun Yaling Yin Peng Li 2021Acta Biochimica et Biophysica Sinica2021,53,10:2
6The association of interleukin-16 gene polymorphisms with IL-16 serum levels and risk of nasopharyngeal carcinoma in a Chinese population显示文摘Xue Qin Qiliu Peng Xiaoxia Lao Zhiping Chen Yu Lu Xianjun Lao Cuiju Mo Jingzhe Sui Junrong Wu Limin Zhai Shi Yang Shan Li Jinmin Zhao 2014Tumor Biology2014,,3:2
7The study on the flotation of tailings of molybdenum minerals for the reclamation of iron显示文摘L1 LIN LV XIANJUN QIU JUN LI PENG 2012Procedia Environmental Sciences2012,12,:1
8Remark on cone semistrictly preinvex functions显示文摘LONG Xianjun PENG Zaiyun ZENG Bo 2009Optim Lett2009,3,:1
9A study on the antioxidant activity and tissues selective inhibition of lipid peroxi-dation by saponins from the roots of Platycodon grandiflorum显示文摘Fu Xianjun Liu Hongbing Wang Peng 2009Am J Chin Ned2009,37,5:1
10Defective EMC1 drives abnormal retinal angiogenesis via Wnt/β-catenin signaling and may be associated with the pathogenesis of familial exudative vitreoretinopathy显示文摘Endoplasmic reticulum(ER)membrane protein complex(EMC)is required for the co-translational insertion of newly synthesized multi-transmembrane proteins.Compromised EMC function in different cell types has been implicated in multiple diseases.Using inducible genetic mouse models,we revealed defects in retinal vascularization upon endothelial cell(EC)specific deletion of Emc1,the largest subunit of EMC.Loss of Emc1 in ECs led to reduced vascular progression and vascular density,diminished tip cell sprouts,and vascular leakage.We then performed an unbiased transcriptomic analysis on human retinal microvascular endothelial cells(HRECs)and revealed a pivotal role of EMC1 in theβ-catenin signaling pathway.Further in-vitro and in-vivo experiments proved that loss of EMC1 led to compromisedβ-catenin signaling activity through reduced expression of Wnt receptor FZD4,which could be restored by lithium chloride(LiCl)treatment.Driven by these findings,we screened genomic DNA samples from familial exudative vitreoretinopathy(FEVR)patients and identified one heterozygous variant in EMC1 that co-segregated with FEVR phenotype in the family.In-vitro expression experiments revealed that this variant allele failed to facilitate the expression of FZD4 on the plasma membrane and activate theβ-catenin signaling pathway,which might be a main cause of FEVR.In conclusion,our findings reveal that variants in EMC1 gene cause compromisedβ-catenin signaling activity,which may be associated with the pathogenesis of FEVR.Shujin Li Mu Yang Rulian Zhao Li Peng Wenjing Liu Xiaoyan Jiang Yunqi He Erkuan Dai Lin Zhang Yeming Yang Yi Shi Peiquan Zhao Zhenglin Yang Xianjun Zhu 2023Genes & Diseases2023,10,6:1
11Guidelines for the diagnosis and treatment of acute pancreatitis in China (2021)显示文摘Acute pancreatitis(AP)is a common acute abdominal condition of the digestive system.In recent years,treatment concepts,methods,and strategies for the diagnosis of AP have advanced,and this has played an important role in promoting the standardization of AP diagnosis and treatment and improving the treatment quality of AP patients.On the basis of previous guidelines and expert consensus,this guideline adopts an evidence-based,problem-based expression;synthesizes important clinical research data at home and abroad in the most recent 5 years;and forms 29 recommendations through multidisciplinary expert discussion,including diagnosis,treatment,and follow-up.It is expected to provide evidence support for the treatment of AP in the clinical setting in China.Fei Li Shouwang Cai Feng Cao Rufu Chen Deliang Fu Chunlin Ge Chunyi Hao Jihui Hao Heguang Huang Zhixiang Jian Gang Jin Ang Li Haimin Li Shengping Li Weiqin Li Yixiong Li Tingbo Liang Xubao Liu Wenhui Lou Yi Miao Yiping Mou Chenghong Peng Renyi Qin Chenghao Shao Bei Sun Guang Tan Xiaodong Tian Huaizhi Wang Lei Wang Wei Wang Weilin Wang Junmin Wei Heshui Wu Wenming Wu Zheng Wu Changqing Yan Yinmo Yang Xiaoyu Yin Xianjun Yu Chunhui Yuan Taiping Zhang Yupei Zhao on behalf of the Chinese Pancreatic Surgery Association 2021Journal of Pancreatology2021,4,2:1
12Association of IL-2 polymorphisms and IL-2 serum levels with susceptibility to HBV-related hepatocellular carcinoma in a Chinese Zhuang population显示文摘Qiliu Peng Haiwei Li Xianjun Lao Yan Deng Zhiping Chen Xue Qin Shan Li 2014Infection, Genetics and Evolution2014,,:1
13Optimality conditions for the Henig efficient solution of vector equilibrium problems with constrains显示文摘LONG Xianjun HUANG Yingquan PENG Zaiyun 2011Optimization Letters2011,,5:1
14Think in Higher Education Administration Based on Quality ProJect显示文摘Hou Xianjun Peng Wuliang 2012Advances in Intelligent and Soft Computing2012,109,:1
15Renin--angiotensin system inhibitor is associated with the reduced risk of all-cause mortality in COVID-19 among patients with/without hypertension显示文摘Consecutively hospitalized patients with confirmed coronavirus disease 2019(COVID-19)in Wuhan,China were retrospectively enrolled from January 2020 to March 2020 to investigate the association between the use of renin–angiotensin system inhibitor(RAS-I)and the outcome of this disease.Associations between the use of RAS-I(angiotensin-converting enzyme inhibitor(ACEI)or angiotensin receptor blocker(ARB)),ACEI,and ARB and in-hospital mortality were analyzed using multivariate Cox proportional hazards regression models in overall and subgroup of hypertension status.A total of 2771 patients with COVID-19 were included,with moderate and severe cases accounting for 45.0%and 36.5%,respectively.A total of 195(7.0%)patients died.RAS-I(hazard ratio(HR)=0.499,95%confidence interval(CI)0.325–0.767)and ARB(HR=0.410,95%CI 0.240–0.700)use was associated with a reduced risk of all-cause mortality among patients with COVID-19.For patients with hypertension,RAS-I and ARB applications were also associated with a reduced risk of mortality with HR of 0.352(95%CI 0.162–0.764)and 0.279(95%CI 0.115–0.677),respectively.RAS-I exhibited protective effects on the survival outcome of COVID-19.ARB use was associated with a reduced risk of all-cause mortality among patients with COVID-19.Huai-yu Wang Suyuan Peng Zhanghui Ye Pengfei Li Qing Li Xuanyu Shi Rui Zeng Ying Yao Fan He Junhua Li Liu Liu Shuwang Ge Xianjun Ke Zhibin Zhou Gang Xu Ming-hui Zhao Haibo Wang Luxia Zhang Erdan Dong 2022Frontiers of Medicine2022,16,1:0
16Assessment of Hebei flora against the IUCN Red List Criteria in China显示文摘Some plants of Hebei Province in China are under threat from human activities,such as over-herding and over-exploitation of wild medicinal plants and industrial plants,etc.To identify the plants in danger in the province and to inspect the quality of the environment encompassing Beijing and Tianjin,a red list of the threatened flora of Hebei Province was produced by using the IUCN Red List Criteria(version 3.1)and its guidelines(version 6.2).Some 262 species were assessed and the results were as follows:(1)the threatened flora include 211 species,accounting for 7.95%of the total native vascular plants.Among them,44 are Critically Endangered,80 Endangered and 87 Vulnerable;(2)the destruction of the habitat caused by human activities and the actual or potential exploitation of the plants themselves were the main threat factors of Hebei flora;(3)most of the threatened plants are located in the western,northern and northeastern mountainous regions,namely the key regions of Hebei plant diversity;the endemic and regionally endemic species are severely threatened.Consequently,the assessment not only presented the threatened status of Hebei flora but also indicated the relatively fragile health status of the environment of Beijing and Tianjin.Thus,it is suggested that the application of the IUCN Red List Criteria at the regional level,as an index,could reflect the health status of the local ecosystem.In addition,more concrete measures are needed to conserve the plant diversity and the natural ecosystem of Hebei Province and even the whole region encompassing Beijing and Tianjin.Xianjun PENG Jiancheng ZHAO Lin LI Yongzhen SUN Yulu NIU Xiaoli GUO 2008Frontiers in Biology2008,3,2:0
17Integrating genome-wide association and transcriptome analysis to provide molecular insights into heterophylly and eco-adaptability in woody plants显示文摘Heterophylly is regard as an important adaptive mechanism in response to different environments within plants.However,the genetic mechanisms responsible for heterophylly in woody plants are still poorly understood.Herein,the divergence of heterophyllous leaves was investigated at morphogenesis and using microdissection and physiological indexes in paper mulberry,and the genetic basis of heterophylly was further revealed combined with genome-wide association study(GWAS),transcriptome analysis and weighted gene coexpression network analysis(WGCNA).Our results revealed that the flavonoid content and antioxidant activity increased gradually from the entire leaf to the palmatisect leaf,while the hormone content and net photosynthetic rate decreased.Through GWAS and transcriptome analysis,a total of 98 candidate genes and 2338 differentially expressed genes associated with heterophylly were identified.Importantly,we uncovered critical variations in the candidate genes Bp07g0981(WOX)and Bp07g0920(HHO),along with significant differences in haplotypes and expression levels among heterophyllous leaves.Our results also suggested that the genes involved in hormone signaling pathways,antioxidant activity,and f lavonoid metabolism might be closely related to the heterophylly of paper mulberry,which could account for the physiological data.Indeed,CR-wox mutant lines showed significant changes in leaf phenotypes,and differential expression profile analysis also highlighted the expression of genes related to phytohormones and transcription factors.Together,the genetic variations and candidate genes detected in this study provide novel insights into the genetic mechanism of heterophylly,and would improve the understanding of eco-adaptability in heterophyllous woody plants.Yanmin Hu Feng Tang Dan Zhang Shihua Shen Xianjun Peng 2023Horticulture Research2023,10,11:0
18Molecular surface functionalization of In_(2)O_(3) to tune interfacial microenvironment for enhanced catalytic performance of CO_(2) electroreduction显示文摘Indium-based materials(e.g.,In_(2)O_(3))are a class of promising non-noble metal-based catalysts for electroreduction of carbon dioxide(CO_(2)).However,competitive hydrogen reduction reaction(HER)on indium-based catalysts hampers CO_(2) reduction reaction(CO_(2)RR)process.We herein tune the interfacial microenvironment of In_(2)O_(3) through chemical graft of alkyl phosphoric acid molecules using a facile solution-processed strategy for the first time,which is distinguished from other researches that tailor intrinsic activity of In_(2)O_(3) themselves.The surface functionalization of alkyl phosphoric acids over In_(2)O_(3) is demonstrated to remarkably boost CO_(2) conversion.For example,octadecylphosphonic acid modified In_(2)O_(3) exhibits Faraday efficiency for H_(2) H_(2) H_(2)(FE)of as low as 6.6%and FEHCOOH of 86.5%at-0.67 V vs.RHE,which are far superior to parent In_(2)O_(3) counterparts(FE of 24.0%and FEHCOOH of 63.1%).Moreover,the enhancing effect of alkyl phosphoric acid functionalization is found to be closely related to the length of alkyl chains.By virtue of comprehensive experimental characterizations and molecular dynamics simulations,it is revealed that the modification of alkyl phosphoric acids significantly alters the interface microenvironment of the electrocatalyst,which changes the electrocatalyst surface from hydrophilic and aerophobic to hydrophobic and aerophilic.In this case,the water molecules are pushed away and more CO_(2) molecules are trapped,increasing local CO_(2) concentration at In_(2)O_(3) active sites,thus leading to the significantly enhanced CO_(2)RR and suppressed HER.This work highlights the importance of regulating the interfacial microenvironment of inorganic catalysts by molecular surface functionalization as a means for promoting the electrochemical performance in electrosynthesis and beyond.Suwen WangQiang GaoCui Xu Shuai Jiang Mengyang Zhang Xianjun Yin Hui-Qing Peng Bin Liu Yu-Fei Song 2024Nano Research2024,17,3:0
19Consensus of clinical diagnosis and treatment for non-functional pancreatic neuroendocrine neoplasms with diameter<2 cm显示文摘In clinical practice,pancreatic neuroendocrine neoplasms(pNENs)with a diameter smaller than 2 cm are commonly referred to as small pNENs.Due to their generally favorable biological characteristics,the diagnosis and treatment of small pNENs differ from other pNENs and are somewhat controversial.In response to this,the Chinese Pancreatic Surgery Association,Chinese Society of Surgery,Chinese Medical Association have developed a consensus on the diagnosis and treatment of small pNENs,which is based on evidence-based medicine and expert opinions.This consensus covers various topics,including concepts,disease assessment,treatment selection,follow-up,and other relevant aspects.Wu Wenming Cai Shouwang Chen Rufu Fu Deliang Ge Chunlin Hao Chunyi Hao Jihui Huang Heguang Jian Zhixiang Jin Gang Li Fei Li Haimin Li Shengping Li Weiqin LiYixiong Liang Tingbo Liu Xubao Lou Wenhui Miao Yi Mou Yiping Peng Chenghong Qin Renyi Shao Chenghao Sun Bei Tan Guang Wang Huaizhi Wang Lei Wang Wei Wang Weilin Wei Junmin Wu Heshui Wu Zheng Yan Changqing Yang Yinmo Yin Xiaoyu Yu Xianjun Yuan Chunhui Zhao Yupei 2023Journal of Pancreatology2023,6,3:0
20Microstructure and mechanical properties of transient liquid phase bonding DD5 single-crystal superalloy to CrCoNi-based medium-entropy alloy显示文摘This study focuses on the transient liquid phase(TLP)bonding of DD5 single-crystal superalloy to Cr Co Nibased medium-entropy alloy(MEA)using a BNi-2 filler alloy.The microstructure and mechanical properties of the TLP-bonded DD5/MEA joint were evaluated,and the microstructural evolution mechanism was investigated.The formation of the isothermal solidification zone(ISZ)depended on the diffusion of the melting-point depressants(Si and B elements)from the liquid filler into the DD5 and MEA substrates,as well as the dissolution of the substrates.Boron diffused along theγchannel of DD5 and reacted to form M_(5)B_(3)boride,herein referred to as the diffusion-affected zone(DAZ I).Similarly,the Cr_(5)B_(3)boride precipitated in the Ni-rich MEA matrix adjacent to the MEA substrate(i.e.,DAZ II).Additionally,a coherent orientation of[0]_(BCY)//[011]_(FCC)and(002)_(BCY)//(200)_(FCC)was detected between M_(5)B_(3)boride with a body-centered tetragonal(BCT)structure and the face-centered cubic(FCC)matrix.The performance of the joint was dominated by the properties of the bonding seam.As the bonding time increased from 20to 80 min,the athermal solidification zone(including eutectic microstructure)was gradually replaced by the ISZ exhibiting excellent plastic deformation capability,and the shear strength of the joint was improved.The maximum shear strength(752 MPa)was achieved when the eutectic-free joint was bonded at 1050℃ for 80 min.The fracture morphology revealed a mixture mode,indicating the initiation of cracks in the DAZ II,mainly propagating in the ISZ,and passing through the DAZ I.Shiwei Li Jinglong Li Junmiao Shi Yu Peng Xuan Peng Xianjun Sun Feng Jin Jiangtao Xiong Fusheng Zhang 2022Journal of Materials Science & Technology2022,,1:0
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