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81篇 您的检索式:作者名="Zhichao Sun"
    题名 作者 年代 出处 被引量
1aunalysis of the Genome Sequence of the Medicinal Plant Salvia miltiorrhiza显示文摘Haibin Xu Jingyuan Song Hongmei Luo Yujun Zhang Qiushi Li Yingjie Zhu Jiang Xu Ying Li Chi Song Bo Wang Wei Sun Guoan Shen Xin Zhang Jun Qian Aijia Ji Zhichao Xu Xiang Luo Liu He Chuyuan Li Chao Sun Haixia Yah Guanghong Cui Xiwen Li Xian 'en Li Jianhe Wei Juyan Liu Yitao Wang Alice Hayward David Nelson Zemin Ning Reuben J. Peters Xiaoquan Qi Shilin Chen 2016Molecular Plant2016,9,6:70
2Recent developments in plastic forming technology of titanium alloys显示文摘Titanium alloys have been used extensively in industry fields including aviation,aerospace and automobile due to their excellent comprehensive properties.Research and development of advanced plastic forming technology are of great importance to manufacturing titanium products of high performance and lightweight with low cost and short cycle.This paper analyzes the development tendencies of titanium alloy forming technology.Recent achievements in precision forming,microstructure control and multi-scale simulation of titanium alloys are reviewed.The forming techniques of large-sale integral complex components are presented.YANG He FAN XiaoGuang SUN ZhiChao GUO LiangGang ZHAN Mei 2011Science China(Technological Sciences)2011,54,2:33
3Large-scale analysis of small RNAs derived from traditional Chinese herbs in human tissues显示文摘Plant-derived microRNAs have recently been reported to function in human blood and tissues. Controversy was immediately raised due to possible contamination and the lack of large sample sizes. Here, we report thousands of unique small RNAs derived from traditional Chinese medicine(TCM) herbs found in human blood cells and mouse lung tissues using a large-scale analysis.We extracted small RNAs from decoctions of 10 TCM plants(Ban Zhi Lian, Chai Hu, Chuan Xin Lian, Di Ding Zi Jin, Huang Qin, Jin Yin Hua, Lian Qiao, Pu Gong Ying, Xia Ku Cao, and Yu Xing Cao) and obtained millions of RNA sequences from each herb. We also obtained RNA-Seq data from the blood cells of humans who consumed herbal decoctions and from the lung tissues of mice administered RNAs from herbal decoctions via oral gavage. We identified thousands of unique small RNA sequences in human blood cells and mouse lung tissues. Some of these identified small RNAs from Chuan Xin Lian and Hong Jing Tian could be mapped to the genomes of the herbs, confirming their TCM plant origin. Small RNAs derived from herbs regulate mammalian gene expression in a sequence-specific manner, and thus are a superior novel class of herbal drug components that hold great potential as oral gene-targeted therapeutics, highlighting the important role of herbgenomics in their development.Fengming Huang Jianchao Du Zhu Liang Zhichao Xu Jiantao Xu Yan Zhao Yexuan Lin Song Mei Quan He Jindong Zhu Qiang Liu Yanxu Zhang Yuhao Qin Wei Sun Jingyuan Song Shilin Chen Chengyu Jiang 2019Science China(Life Sciences)2019,62,3:14
4In situ U-Pb dating of titanite by LA-ICPMS显示文摘Titanite is an ideal mineral for U-Pb isotopic dating because of its relatively high U,Th and Pb contents.Here,we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS.Standards of titanite (BLR-1 and OLT-1) and zircon (91500 and GJ-1) were dated using single spot and line raster scan analytical methods.To check the matrix effect,titanite (BLR-1) and zircon (91500) standards were analyzed as the external standards.The weighted mean 206 Pb/238 U ages of OLT-1 titanite are 1015±5 Ma (2,n=24) and 1017±6 Ma (2,n=24) by single spot and line raster scan analyses,respectively,using BLR-1 titanite as the external standard.These ages are consistent with its reference age of about 1014 Ma.However,using 91500 zircon as the external standard,the weighted mean 206 Pb/238 U ages are 917±4 Ma (2,n=24) and 927±5 Ma (2,n=24) for BLR-1 titanite,and 891±4 Ma (2,n=24) and 901±5 Ma (2,n=24) for OLT-1 titanite by single spot and line raster scan analyses,respectively.It is evident that these ages are ~12% younger than their reference values.Our results reveal that significant matrix effect does exist between different kinds of minerals during LA-ICPMS U-Pb age determination,whereas it is insignificant between same minerals.Therefore,same mineral must be used as the external standard for fractionation corrections during in situ LA-ICPMS U-Pb age analysis.In addition,we determined U-Pb ages for titanites from the Early Cretaceous Fangshan pluton,which indicates a rapid cooling history of this pluton.SUN JinFeng YANG JinHui wu FuYuan XIE LieWen YANG YueHeng LIU ZhiChao LI XianHua 2012Chinese Science Bulletin2012,57,20:14
5Effect of hydrophilic silica nanoparticles on hydrate formation: Insight from the experimental study显示文摘Invasion of drilling fluid into natural gas hydrate deposits during drilling might damage the reservoir,induce hydrate dissociation and then cause wellbore instability and distortion of the data from well logging. Adding nanoparticles into drilling fluid is an effective method in reducing the invasion of drilling fluid and enhancing borehole stability. However, the addition of nanoparticles might also introduce hydrate formation risk in borehole because they can act as the 'seeds' for hydrate nucleation. This paper presents an experimental study of the effect of hydrophilic silica nanoparticle on gas hydrate formation in a dynamic methane/liquid-water system. In the experiment, the ultrapure water with and without1.0 wt%–6.0 wt% concentrations of silica nanoparticles, grain sizes of 20 and 50 nm, were pressurized by methane gas under varied conditions of temperature and pressure. The induction time, the gas consumption, and the average rate of gas consumption in the system were measured and compared to those in ultrapure water. The results show that a concentration of 4.0 wt% hydrophilic SiO_2 particles with a grain size of 50 nm has a relatively strong inhibition effect on hydrate formation when the initial experimental condition is 5.0 °C and 5.0 MPa. Compared to ultrapure water, the hydrophilic nano-SiO_2 fluid increases the induction time for hydrate formation by 194% and decreases the amount and average rate of hydrate formation by 10% and 17%, respectively. This inhibition effect may be attributed to the hydrophilicity,amount and aggregation of silica nanoparticle according to the results of water activity and zeta potential measurements. Our work also elucidates hydrophilic, instead of hydrophobic, nanoparticles can be added to the drilling fluid to maintain wellbore stability and to protect the hydrate reservoir from drilling mud damage, because they exhibit certain degree of hydrate inhibition which can reduce the risk of hydrate reformation and aggregation during gas hydrate or deep water drilling if their concentration can be controlled properly.Ren Wang Tianle Liu Fulong Ning Wenjia Ou Ling Zhang Zhen Wang Li Peng Jiaxin Sun Zhichao Liu Tianshu Li Huicui Sun Guosheng Jiang 2019Journal of Energy Chemistry2019,28,3:12
6A Local Cluster of Omicron Variant COVID-19 Likely Caused by Internationally Mailed Document——Beijing Municipality,China,January 2022显示文摘On January 15,2022,a 26 years old female(Case A)went to a sampling site for coronavirus disease 2019(COVID-19)testing due to excessive fatigue and fever for two days.This patient preliminarily tested positive for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)using a quantitative real-time reverse transcription polymerase chain reaction(qRT-PCR)method.Daitao Zhang Shuangsheng Wu Zhenyong Ren Ying Sun Xiangfeng Dou Zhaomin Feng Fu Li Yi Tian Shujuan Cui Baiwei Liu Bing Lyu Xiaoli Wang Feng Liu Lina Jin Chu Jiang Lina Tian Zhenjiang Xin Zhichao Liang Lei Jia Quanyi Wang Yang Pan Peng Yang 2022China CDC weekly2022,4,14:6
7Fertilization strategy and application model using a centrifugal variable-rate fertilizer spreader显示文摘With the sustainable development of precision agriculture and the steady progress of variable-rate fertilization technology,the centrifugal variable-rate fertilizer spreader has attracted research attention due to its lower incidence of crush damage,high efficiency,and low cost.To improve fertilization accuracy and uniformity,spreading performance tests were conducted using this spreader in accordance with the test methods specified in ISO 5690 and ASAE S341.2,in which particle mass was weighed in a two-dimensional matrix of collection boxes.The effects of fertilization strategies that control the feed gate flow rate and the disc rotation speed on particle distribution,and application rate per unit area and effective swath width,were investigated.A variable-rate fertilization model was developed by analyzing the variation characteristics resulting from an increasing and decreasing application rate,and field experiments were conducted to verify its accuracy.The results indicated that when the feed gate flow rate was 300 g/s,the mean application rate was 26.47 g,the standard deviation is 2.81,and the coefficient of variation of particle distribution is at its minimum value of 14.25%.When the disc rotation speed was 600 r/min,the fertilizer was most evenly distributed with a coefficient of variation of 13.86%,and an average effective spreader swath width of 24.51 m.The proposed variable-rate fertilization model showed a high fitting degree with an S-shaped function curve for both increasing and decreasing distribution rates and the yielding coefficients of determination were more than 0.82 and 0.71,respectively.The average error between the model predictions and the test results was 9.47%,and the coefficients of determination for the increasing and decreasing distribution rates were 0.91 and 0.82,respectively,which confirmed the accuracy of the proposed variable-rate fertilization model.This investigation provided a theoretical basis for traditional empirical fertilization using centrifugal variable-rate fertilizer spreaders,and guides the selection of a multiple trajectory,variable-rate fertilization strategy.Yinyan Shi Zhichao Hu Xiaochan Wang Morice O.Odhiambo Guoxiang Sun 2018International Journal of Agricultural and Biological Engineering2018,11,6:6
8In situ U-Pb dating of xenotime by laser ablation (LA)-ICP-MS显示文摘Xenotime is an ideal mineral for U-Th-Pb isotopic dating because of its relatively high U and Th contents, but typically low concentration of common Pb. These characteristics, and the fact that it is widespread throughout various types of rocks, suggest that the U-Th-Pb dating of xenotime has broad applications. Studies of U-Pb dating on xenotime by ion microprobe (such as SHRIMP) have increased in recent years, whereas studies by laser ablation (LA)-ICP-MS are still rare. In this study, we developed a technique for U-Pb dating of xenotime using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS. To evaluate the reliability of our method, a xenotime standard, BS-1, was analyzed and calibrated against another xenotime standard, MG-1. The weighted mean 206 Pb/ 238 U ages of 510.1 ± 5.2 Ma (2 n = 21), 509.8 ± 4.3 Ma (2 n = 21) and 510.0 ± 4.6 Ma (2 n = 21) were obtained using beam diameters of 16, 24 and 32 m, respectively. These ages are identical to those determined by ID-TIMS method (weighted mean 206 Pb/ 238 U age of 508.8 ± 1.4 Ma), which supports the reliability of our LA-ICP-MS method. We also analyzed xenotimes in leucogranites from South Tibet and granites from Xihuashan in southern China, and obtained accurate and precise ages. Nevertheless, we observed systematic differences in Pb/U fractionation among xenotime, monazite and zircon. The matrix-effect resulted in either under-correction or over-correction of fractionation, and thus led to inaccurate ages. Thus, a matrix-matched material is required for U-Pb dating of xenotime by LA-ICP-MS.LIU ZhiChao WU FuYuan GUO ChunLi ZHAO ZiFu YANG JinHui SUN JinFeng 2011Chinese Science Bulletin2011,56,27:5
9Bounding surface plasticity model for stress-strain and grain-crushing behaviors of rockfill materials显示文摘Crushing of grains can greatly influence the strength,dilatancy,and stress-strain relationship of rockfill materials.The critical state line(CSL)in the void ratio versus mean effective stress plane was extended to the breakage critical state plane(BCSP).A state void-ratio-pressure index that incorporated the effect of grain crushing was proposed according to the BCSP.Rowe’s stress-dilatancy equation was modified by adding the breakage voidratio-pressure index,which was also incorporated into the formulations of the bounding stress ratio and plastic modulus.A BCSP-based bounding surface plasticity model was proposed to describe the state-dependent stressstrain behaviors and the evolution of grain crushing during shearing process of rockfill materials,and was shown to sufficiently capture the breakage phenomenon.Yang Xiao Zengchun Sun Armin WStuedlein Chenggui Wang Zhijun Wu Zhichao Zhang 2020Geoscience Frontiers2020,11,2:5
10Bacteria-Mediated Synergistic Cancer Therapy:Small Microbiome Has a Big Hope显示文摘The use of bacteria to specifically migrate to cancerous tissue and elicit an antitumor immune response provides a promising platform against cancer with significantly high potency.With dozens of clinical trials underway,some researchers hold the following views:“humans are nearing the first commercial live bacteria therapeutic.”However,the facultative anaerobe Salmonella typhimurium VNP20009,which is particularly safe and shows anticancer effects in preclinical studies,had failed in a phase I clinical trial due to low tumor regression and undesired dose-dependent side effects.This is almost certain to disappoint people’s inflated expectations,but it is noted that recent stateof-the-art research has turned attention to bacteria-mediated synergistic cancer therapy(BMSCT).In this review,the foundation of bacteria-mediated bio-therapy is outlined.Then,we summarize the potential benefits and challenges of bacterial bio-therapy in combination with different traditional anticancer therapeutic modalities(chemotherapy,photothermal therapy,reactive oxygen and nitrogen species therapy,immunotherapy,or prodrug-activating therapy)in the past 5 years.Next,we discuss multiple administration routes of BMSCT,highlighting potentiated antitumor responses and avoidance of potential side effects.Finally,we envision the opportunities and challenges for BMSCT development,with the purpose of inspiring medicinal scientists to widely utilize the microbiome approach in patient populations.Xinyu Lou Zhichao Chen Zhonggui He Mengchi Sun Jin Sun 2021Nano-Micro Letters2021,13,2:3
11Deficient Rnf43 potentiates hyperactive Kras-mediated pancreatic preneoplasia initiation and malignant transformation显示文摘Background:Largely due to incidental detection,asymptomatic pancreatic cystic le-sions(PCLs)have become prevalent in recent years.Among them,intraductal papillary mucinous neoplasm(IPMN)infrequently advances to pancreatic ductal adenocarcinoma(PDAC).Conservative surveillance versus surgical intervention is a difficult clinical decision for both caregivers and PCL patients.Because RNF43 loss-of-function mutations and KRAS gain-of-function mutations concur in a subset of IPMN and PDAC,their biological significance and therapeutic potential should be elucidated.Methods:Pancreatic Rnf43 knockout and Kras activated mice(Rnf43^(−/−);Kras^(G12D))were generated to evaluate their clinical significance in pancreatic pre-neoplastic initiation and malignant transformation.Results:Loss of Rnf43 potentiated the occurrence and severity of IPMN and PDAC in oncogenic Kras mice.The Wnt/β-catenin signaling pathway was activated in pan-creatic Kras^(G12D)and Rnf43 knockout mice and the PORCN inhibitor LGK974 blocked pancreatic IPMN initiation and progression to PDAC accordingly.Conclusions:Rnf43 is a tumor suppressor in the prevention of pancreatic malignant transformation.This genetically reconstituted autochthonous pancreatic Rnf43^(−/−);Kras^(G12D)preclinical cancer model recapitulates the pathological process from pancreatic cyst to cancer in humans and can be treated with inhibitors of Wnt/β-catenin signaling.Since the presence of RNF43 and KRAS mutations in IPMNs predicts future development of advanced neoplasia from PCLs,patients with these genetic anomalies warrant surveillance,surgery,and/or targeted therapeutics such as Wnt/β-catenin inhibitors.Xian Zhou Zhichao Sun Mengdi Zhang Xiaoyu Qu Shuhui Yang Lianmei Wang Yanling Jing Li Li Weiwei Deng Fangming Liu Jin Di Jie Chen Jian Wu Hongbing Zhang 2022Animal Models and Experimental Medicine2022,5,1:3
12Epidemiological Investigation of an Inhalational Anthrax Patient Traveling for Medical Treatment in Beijing Municipality,China,August 2021显示文摘Summary What is already known about this topic?Inhalational anthrax,also known as pulmonary anthrax,is an infectious disease caused by Bacillus anthracis.The patients are usually infected by inhaling aerosolized B.anthracis spores from dead animals or animal products.Compared to cutaneous anthrax,inhalational anthrax is rare and deadly and few cases in China were reported.What is added by this report?This report covers all information of clinical features,laboratory testing,and epidemiological characteristics as well as exposure history of a recent primary inhalational anthrax patient who was seeking medical treatment in Beijing Municipality in August 2021.New laboratory techniques,including second-generation sequencing,polymerase chain reaction,and rapid test for serum antibody,played an important role in the process.What are the implications for public health practice?The information provided in this report,including the correct sample type,epidemiological investigation details,and application of the new diagnostic criteria of anthrax,could assist public health professionals in dealing with anthrax epidemics.Changying Lin Xiangfeng Dou Daitao Zhang Yinqi Sun Huiqiang Han Chunzhi Chen Xiaojun Zhang Shuang Li Yanwei Chen Hongbin Zhang Bin Wang Zhichao Liang Xin Zhang Feng Wei Jiangli Wang Feng Liu Quanyi Wang Jian Shi Peng Yang 2022China CDC weekly2022,4,1:3
13Distribution Features of the Nanhua-Sinian Rifts and their Significance to Hydrocarbon Accumulation in the Tarim Basin显示文摘On the basis of reprocessing 34 new two-dimensional spliced long sections(20,191 km) in the Tarim Basin, the deep structure features of the Tarim Basin were analyzed through interpreting 30,451 km of two-dimensional seismic data and compiling basic maps. Seismic interpretation and geological analysis conclude that the Nanhua-Sinian strata are a set of rift-depression depositional systems according to their tectonic and depositional features. The rift valley formed in the Nanhua Period, and the transformation became weaker during the late Sinian Period, which eventually turned into depression. From bottom to top, the deposited strata include mafic igneous, tillite, mudstone, and dolomite. Three major depocenters developed inside this basin during the rift stage and are distributed in the eastern Tarim Basin, the Awati area, and the southwestern Tarim Basin. Among them, the rift in the eastern Tarim Basin strikes in the near east-west direction on the plane and coincides with the aeromagnetic anomaly belt. This represents a strong magnetic zone formed by upwelling basic volcanic rock along high, steep normal faults of the Nanhua Period. Controlled by the tectonic background, two types of sedimentary systems were developed in the rift stage and depression stage, showing two types of sequence features in the Sinian depositional stage. The Nanhua System appears as a wedge-shaped formation, with its bottom in unconformable contact with the base. The rifting event has a strong influence on the current tectonic units in the Tarim Basin, and affects the distribution of source rock in the Yuertus Formation and reservoir beds in the Xiaoerbulake Formation in Lower Cambrian, as well as the gypseous cap rock in Middle Cambrian. The distribution features of the rifts have important and realistic significance for determining the direction of oil and gas exploration in the deep strata of the Tarim Basin. Comprehensive analysis suggests that the Tazhong region is the most favorable zone, and the Kalpin-Bachu region is the optimal potential zone for exploring sub-salt oil and gas in deep Cambrian strata.BAI Zhongkai CHENG Minghua CHEN Cheng HUO Junzhou ZHANG Junfeng ZHOU Xingui GAO Yongjin ZHAO Bo QIU Haijun HAN Miao YANG Youxing SUN Zhichao MIAO Miaoqing ZHANG Jinhu LI Qingyao 2020Acta Geologica Sinica(English Edition)2020,94,2:3
14Efficient one-pot hydrogenolysis of biomass-derived xylitol into ethylene glycol and 1,2-propylene glycol over Cu–Ni–ZrO_2 catalyst without solid bases显示文摘The directly selective hydrogenolysis of xylitol to ethylene glycol(EG) and 1,2-propylene glycol(1,2-PDO)was performed on Cu–Ni–ZrO_2 catalysts prepared by a co-precipitation method. Upon optimizing the reaction conditions(518 K, 4.0 MPaH_2 and 3 h), 97.0% conversion of xylitol and 63.1% yield of glycols were obtained in water without extra inorganic base. The catalyst still remained stable activity after six cycles and above 80% total selectivity of glycols was obtained when using 20.0% xylitol concentration. XRD, TEM and ICP results indicated that Cu–Ni–ZrO_2 catalysts possess favorable stability. Cu and Ni are beneficial to the cleavage of C–O and C–H bond, respectively. To reduce the hydrogen consumption, isopropanol was added as in-situ hydrogen source and 96.4% conversion of xylitol with 43.6% yield of glycols were realized.Shenglin Li Yifan Zan Yuanyuan Sun Zhichao Tan Gai Miao L. Z. Kong Yuhan Sun 2019Journal of Energy Chemistry2019,28,1:3
15Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers显示文摘Direct generation of chirp-free solitons without external compression in normal-dispersion fiber lasers is a long-term challenge in ultrafast optics.We demonstrate near-chirp-free solitons with distinct spectral sidebands in normaldispersion hybrid-structure fiber lasers containing a few meters of polarization-maintaining fiber.The bandwidth and duration of the typical mode-locked pulse are 0.74 nm and 1.95 ps,respectively,giving the time-bandwidth product of 0.41 and confirming the near-chirp-free property.Numerical results and theoretical analyses fully reproduce and interpret the experimental observations,and show that the fiber birefringence,normal-dispersion,and nonlinear effect follow a phase-matching principle,enabling the formation of the near-chirp-free soliton.Specifically,the phasematching effect confines the spectrum broadened by self-phase modulation and the saturable absorption effect slims the pulse stretched by normal dispersion.Such pulse is termed as birefringence-managed soliton because its two orthogonal-polarized components propagate in an unsymmetrical“X”manner inside the polarization-maintaining fiber,partially compensating the group delay difference induced by the chromatic dispersion and resulting in the selfconsistent evolution.The property and formation mechanism of birefringence-managed soliton fundamentally differ from other types of pulses in mode-locked fiber lasers,which will open new research branches in laser physics,soliton mathematics,and their related applications.Dong Mao Zhiwen He Yusong Zhang Yueqing Du Chao Zeng Ling Yun Zhichao Luo Tijian Li Zhipei Sun Jianlin Zhao 2022Light(Science & Applications)2022,11,2:3
16CeO_(2)with diverse morphologies-supported IrOx nanocatalysts for efficient oxygen evolution reaction—Commemorating the 100th anniversary of the birth of Academician Guangxian Xu显示文摘IrOx-based catalysts are considered the most promising candidates for oxygen evolution reaction(OER)due to their high efficiency.However,improving their intrinsic catalytic activity is essential for practical application.In this work,CeO_(2)with three different morphologies(rod,cube,octahedron)and supported IrOx nanoparticles were fabricated,and they display morphology-dependent OER activity.The IrOx/CeO_(2)-rod shows the highest activity;the catalysts have a catalytic activity sequence of rod>cube>octahedron.A plausible mechanism was proposed:the CeO_(2)support with different morphologies modulates the electronic structure of IrOx by the synergistic interaction promoted by oxygen vacancies between the active component and the support,thereby altering the catalytic activity of the IrOx/CeO_(2)catalyst.Qingqing Li Zhichao Zeng Xiaolei Sun Feng Luo Yaping Du 2021Journal of Rare Earths2021,39,4:3
17The prognostic significance of non-sentinel lymph node metastasis in cutaneous and acral melanoma patients—A multicenter retrospective study显示文摘Background:Whether non-sentinel lymph node(SLN)-positive melanoma patients can benefit from completion lymph node dissection(CLND)is still unclear.The current study was performed to identify the prognostic role of nonSLN status in SLN-positive melanoma and to investigate the predictive factors of non-SLN metastasis in acral and cutaneous melanoma patients.Methods:The records of 328 SLN-positive melanoma patients who underwent radical surgery at four cancer centers from September 2009 to August 2017 were reviewed.Clinicopathological data including age,gender,Clark level,Breslow index,ulceration,the number of positive SLNs,non-SLN status,and adjuvant therapy were included for survival analyses.Patients were followed up until death or June 30,2019.Multivariable logistic regression modeling was performed to identify factors associated with non-SLN positivity.Log-rank analysis and Cox regression analysis were used to identify the prognostic factors for disease-free survival(DFS)and overall survival(OS).Results:Among all enrolled patients,220(67.1%)had acral melanoma and 108(32.9%)had cutaneous melanoma.The 5-year DFS and OS rate of the entire cohort was 31.5%and 54.1%,respectively.More than 1 positive SLNs were found in 123(37.5%)patients.Positive non-SLNs were found in 99(30.2%)patients.Patients with positive non-SLNs had significantly worse DFS and OS(log-rank P<0.001).Non-SLN status(P=0.003),number of positive SLNs(P=0.016),and adjuvant therapy(P=0.025)were independent prognostic factors for DFS,while non-SLN status(P=0.002),the Breslow index(P=0.027),Clark level(P=0.006),ulceration(P=0.004),number of positive SLNs(P=0.001),and adjuvant therapy(P=0.007)were independent prognostic factors for OS.The Breslow index(P=0.020),Clark level(P=0.012),and number of positive SLNs(P=0.031)were independently related to positive non-SLNs and could be used to develop more personalized surgical strategy.Conclusions:Non-SLN-positive melanoma patients had worse DFS and OS even after immediate CLND than those with non-SLN-negative melanoma.The Breslow index,Clark level,and number of positive SLNs were independent predictive factors for non-SLN status.Wei Sun Yu Xu JiLong Yang ZhiChao Liao Tao Li Kai Huang Poulam Patel WangJun Yan Yong Chen 2020Cancer Communications2020,40,11:2
18Minor-effect QTL for heading date detected in crosses between indica rice cultivar Teqing and near isogenic lines of IR24显示文摘Identification of quantitative trait loci(QTL) having small effects on heading date(HD) is important for fine-tuning flowering time in rice(Oryza sativa L.). In this study, minor-effect QTL for HD were identified using five segregating rice populations, including a recombinant inbred line population derived from crosses between indica cultivar Teqing and near isogenic lines of IR24,and four populations derived from residual heterozygotes identified in the original population.HD data from these populations were obtained in multiple years or at two locations with different photoperiods. A total of 11 QTL were detected; they had small additive effects ranging from 0.21 to1.63 days. The QTL were all detected in different populations, locations and/or years, having consistent allelic effects across experiments and a stable magnitude across years at the same location. These QTL, and other minor-effect QTL that have been cloned or fine-mapped, generally do not have strong photoperiod sensitivity, and thus can be used in a wide range of ecogeographical conditions. Seven of the 11 QTL were different from those that have been cloned or fine-mapped, providing new candidates for gene cloning and marker-assisted breeding. Allelic effects of QTL corresponding to those that had been cloned or fine-mapped, were much smaller in this study than previously reported. The results supported the assumption that qualitative and quantitative genes may be different alleles at the same loci, suggesting that it may be promising to identify minor-effect QTL from major heading date genes/QTL that have been cloned.Zhichao Sun Yujun Zhu Junyu Chen Hui Zhang Zhenhua Zhang Xiaojun Niu Yeyang Fan Jieyun Zhuang 2018The Crop Journal2018,6,3:2
19In Silico search and biological validation of MicroR171 family related to abiotic stress response in mulberry(Morus alba)显示文摘miR171 belongs to a highly conserved and ubiquitously expressed micro RNA gene family across species that play a critical role in controlling plant growth and development through the regulation of the miR171-SCL(scarecrow-like proteins)module.There is limited research available on the evolutionary relationship and functional diversification of miR171 members.In this study,we identified eight miR171 genes in the mulberry genome by bioinformatics analysis that were subsequently used to compare the evolutionary levels and explore abiotic stress mechanisms mediated by mno-miR171s(Morus notabilis miR171s).The results of phylogenetic analysis showed that the mature mno-miR171 sequences have strong sequence conservation,but their critical sites also exhibit high variation leading to functional diversification.Through quantitative real-time PCR,the expression profile of each mno-miR171 was analyzed under different stress treatments.All mno-miR171s,apart from mnomiR171h,were found to be significantly up-regulated under salt and drought stress conditions.The target genes of mno-miR171a namely,Morus020885 and Morus011800,were predicted and verified using the plural RNA method.5-rapid amplification of complementary DNA ends assays further to reveal that the target genes could be degraded by mno-miR171a post-transcriptionally.Overexpression of mno-miR171a in Arabidopsis improved the percentage of seed germination when the seeds were grown in NaCl-and mannitol-containing media.Transgenic plants were observed to grow better under drought conditions.The expression of various stress genes was significantly higher in transgenic plants than in wild type,except ERF11.Taken together,our study confirmed that mno-miR171a enhanced plant resistance to adverse stress environments via the regulation of the SCL targets.Zhichao Sun R.M.Saravana Kumar Jisheng Li Guiming Yang Yan Xie 2022Horticultural Plant Journal2022,8,2:2
20Mitochondrion-targeted PENTATRICOPEPTIDE REPEAT5 is required for cis-splicing of nad4 intron 3 and endosperm development in rice显示文摘Endosperm as the storage organ of starch and protein in cereal crops largely determines grain yield and quality.Despite the fact that several pentatricopeptide repeat(PPR)proteins required for endosperm development have been identified in rice,the molecular mechanisms of many P-type PPR proteins in endosperm development remains unclear.Here,we isolated a rice floury endosperm mutant ppr5 that developed small starch grains and an abnormal aleurone layer,accompanied by decreased starch,protein,and amylose contents.Map-based cloning combined with a complementation test demonstrated that PPR5 encodes a P-type PPR protein that is localized to the mitochondria.The mutation in PPR5 caused reduced splicing efficiency of mitochondrial NADH dehydrogenase 4(nad4)gene intron 3 and reduced complex I assembly and activity.Loss of PPR5 function greatly upregulated expression of alternative oxidases(AOXs),reduced ATP production,and affected mitochondrial morphology.We demonstrate that PPR5,as a P-type PPR protein,is required for mitochondrial function and endosperm development by controlling the cis-splicing of mitochondrial nad4 intron 3.Long Zhang Yanzhou Qi Mingming Wu Lei Zhao Zhichao Zhao Cailin Lei Yuanyuan Hao Xiaowen Yu Yinglun Sun Xin Zhang Xiuping Guo Yulong Ren Jianmin Wan 2021The Crop Journal2021,9,2:2
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