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1体内腺相关病毒-常间回文重复序列丛集及其相关蛋白9介导的基因编辑可改善家族性高胆固醇血症的动脉粥样硬化显示文摘低密度脂蛋白受体(low-density lipoprotein receptor,Ldlr)基因突变是家族性高胆固醇血症的主要原因之一,可导致动脉粥样硬化,并具有很高的终生心血管病风险。常间回文重复序列丛集(clustered regularly interspaced short palindromic repeats,CRISPR)/CRISPR相关蛋白9(CRISPR-related protein 9,Cas9)系统是基因编辑纠正基因突变从而改善疾病的有效工具。该研究的目的是通过腺相关病毒(adeno-associated virus,AAV)携带的CRISPR/Cas9系统进行体内体细胞基因编辑,以确定其能否在小鼠模型中治疗由Ldlr突变体引起的家族性高胆固醇血症。刘青(译) 叶鹏(审校) Zhao H Li Y He L Pu W Yu W Li Y Wu YT Xu C Wei Y Ding Q Song BL Huang H Zhou B 2020中华高血压杂志2020,28,3:22
2Current status of diagnosis and treatment of bladder cancer in China-Analyses of Chinese Bladder Cancer Consortium database显示文摘Objective:To investigate current status of diagnosis and treatment of bladder cancer in China.Methods:A database was generated by Chinese Bladder Cancer Consortium(CBCC).From January 2007 to December 2012,14,260 cases from 44 CBCC centers were included.Data of diagnosis,treatment and pathology were collected.Results:The average age was 63.5 year-old and most patients were male(84.3%).The most common histologic types were urothelial carcinoma(91.4%),adenocarcinoma(1.8%),and squamous carcinoma(1.9%).According to 1973 and 2004 WHO grading system,42.0%,41.0%,and 17.0% of patients were grade 1,2,and 3,and 16.0%,48.7%,and 35.3% of patients were papillary urothelial neoplasms of low malignant potential,low,and high grade,respectively.Non-muscle invasive bladder cancer(NMIBC)and muscle invasive bladder cancer(MIBC)were 25.2% and 74.1%,respectively(0.8% not clear).Carcinoma in situ was only 2.4%.Most patients were diagnosed by white-light cystoscopy with biopsy(74.3%).Fluorescence and narrow band imaging cystoscopy had additional detection rate of 1.0% and 4.0%,respectively.Diagnostic transurethral resection(TUR)provided detection rate of 16.9%.Most NMIBCs were treated with TUR(89.2%).After initial TUR,2.6%accepted second TUR,and 45.7%,69.9%,and 58.7% accepted immediate,induced,and maintenance chemotherapy instillation,respectively.Most MIBCs were treated with radical cystectomy(RC,59.7%).Laparoscopic RCs were 35.1%,while open RC 63.4%.Extended and standard pelvic lymph node dissection were 7% and 66%,respectively.Three most common urinary diversions were orthotopic neobladder(44%),ileal conduit(31%),and ureterocutaneostomy(23%).Only 2.3% of patients accepted neo-adjuvant chemotherapy and only 18%of T3 and T4 patients accepted adjuvant chemotherapy.Conclusion:Disease characteristics are similar to international reports,while differences of diagnosis and treatment exist.This study can provide evidences for revisions of the guideline on bladder cancer in China.Kaiwen Li Tianxin Lin Wei Xue Xin Mu Enci Xu Xu Yang Fubao Chen Guangyong Li Lulin Ma Guoliang Wang Chaozhao Liang Haoqiang Shi Ming Li Mao Tang Xueyi Xue Yisong Lv Yaoliang Deng Chengyang Li Zhiwen Chen Xiaozhou Zhou Fengshuo Jin Xudong Liu Jinxin Wei Lei Shi Xin Gou Weiyang He Liqun Zhou Lin Cai Baiye Jin Guanghou Fu Xiangbo Kong Hongyan Sun Ye Tian Lang Feng Tiejun Pan Yiyi Wu Dongwen Wang Hailong Hao Benkang Shi Yaofeng Zhu Qiang Wei Ping Han Changli Wu Dawei Tian Zhangqun Ye Zheng Liu Zhiping Wang Junqiang Tian Lin Qi Minfeng Chen Wei Li Jinchun Qi Gongxian Wang Longlong Fu Zhaolin Sun Guangheng Luo Zhoujun Shen Zhaowei Zhu Jinchun Xing Zhun Wu Dong Wei Xin Chen Yanqun Na Hongfeng Guo Chunxi Wang Zhihua Lu Chuize Kong Yang Liu Jin Yang Jianyun Hu Xin Gao Jielin Li Changjun Yin Pu Li Shan Chen Zhen Du Jiongming Li Yongji Yan Xu Zhang Shuang Huang Fangjian Zhou Zhiling Zhang Yinghao Sun Shuxiong Zeng Song Cen Jiaquan Zhou Hanzhong Li Jin Wen Jian Huang 2015Asian Journal of Urology2015,2,2:21
3Genome Analysis of the Ancient Tracheophyte Selaginella tama#scina Reveals Evolutionary Features Relevant to the Acquisition of Desiccation Tolerance显示文摘Zhichao Xu Tianyi Xin Dorothea Bartels Ying Li Wei Gu Hui Yao Sai Liu Haoying Yu Xiangdong Pu Jianguo Zhou Jiang Xu Caicai xi Hetian Lei Jingyuan song Shilin Chen 2018Molecular Plant2018,11,7:20
4Experimental Investigation into Characteristics of Plasma Aerodynamic Actuation Generated by Dielectric Barrier Discharge显示文摘This article carries out synthetic measurements and analysis of the characteristics of the asymmetric surface dielectric barrier discharge plasma aerodynamic actuation.The rotational and vibrational temperatures of an N2 (C3Пu) molecule are measured in terms of the optical emission spectra from the N2 second positive system.A simplified collision-radiation model for N2(C) and N2+(B) is established on the basis of the ratio of emission intensity at 391.4 nm to that at 380.5 nm and the ratio of emission intensity at 371.1 nm to that at 380.5 nm for calculating temporal and spatial averaged electron temperatures and densities.Under one atmosphere pressure,the electron temperature and density are on the order of 1.6 eV and 1011cm-3 respectively.The body force induced by the plasma aerodynamic actuation is on the order of tens of mN while the induced flow velocity is around 1.3m/s.Starting vortex is firstly induced by the actuation;then it develops into a near-wall jet,about 70 mm downstream of the actuator.Unsteady plasma aerodynamic actuation might stimulate more vortexes in the flow field.The induced flow direction by nanosecond discharge plasma aerodynamic actuation is not parallel,but vertical to the dielectric layer surface.Wu Yun Li Yinghong Jia Min Song Huimin Su Changbing Pu Yikang 2010Chinese Journal of Aeronautics2010,23,1:20
5ALDH2 protects against stroke by clearing 4-HNE显示文摘(ALDH2 ) 醛脱氢酶 2 是使象 4-hydroxy-2-nonenal (4-HNE ) 那样的乙醇和有毒的醛产生代射变化的 mitochondrial 酶。用不偏的 proteomic 搜索,我们作为与自发地高血压的老鼠(SHR ) 相比在击容易的自发地高血压的老鼠(SHR-SP ) 识别了 ALDH2 缺乏。我们作为 overexpression 在 neuronal 损害结束了 ALDH2 缺乏的原因的角色或 ALDH2 的激活由清除 4-HNE 在授与 neuroprotection 在 vitro 研究。进一步, ALDH2 击倒的老鼠揭示了 PKCε 的 neuroprotective 效果的缺席;。被知道对击施加保护的中等乙醇管理被显示提高 4-HNE 的 detoxification,并且免于 ischemic 通过 PKCε 的服的损害; -ALDH2 小径。在 SHR-SP,浆液 4-HNE 水平固执地与 lifespan 相反地被提高并且相关。在在人的击的 4-HNE 的角色被它的血浆层次的坚持的举起也在击以后建议至少 6 个月。最后,我们观察到发展了的跟随 8 年的 1 242 个题目中的 21 个比没得中风的那些摸有的更高起始的血浆 4-HNE 层次。这些调查结果建议 ALDH2 小径的激活可以在击容易的题目的鉴定用作一个有用索引,并且 ALDH2 小径可以是在击的治疗学的干预的一个潜在的目标。Jin-Min Guo Ai-Jun Liu Pu Zang Wen-Zhe Dong Li Ying Wei W ang Pu Xu Xu-Rui Song Jun Cai She-Qing Zhang Jun-Li Duan Jawahar L Mehta Ding-Feng Su 2013Cell Research2013,23,7:19
6Constitutive Modeling for Flow Behaviors of Superaustenitic Stainless Steel S32654 during Hot Deformation显示文摘Hot deformation behavior of superaustenitic stainless steel S32654 was investigated with hot compression tests at temperatures of 950-1 250 ℃ and strain rates of 0.001-10s^(-1).Above 1 150 ℃,with strain rate lower than 0.1s^(-1),the flow curves exhibit nearly steady-state behavior,while at higher strain rate,continuous flow softening occurs.To provide a precise prediction of flow behavior for the alloy,the constitutive modeling considering effect of strain was derived on the basis of the obtained experimental data and constitutive relationship which incorporated Arrhenius term and hyperbolic-sine type equation.The material constantsα,n,Q and lnA are found to be functions of the strain and can be fitted employing eighth-order polynomial.The developed constitutive model can be employed to describe the deformation behavior of superaustenitic stainless steel S32654.En-xiang PU Han FENG Min LIU Wen-jie ZHENG Han DONG Zhi-gang SONG 2016Journal of Iron and Steel Research(International)2016,23,2:14
7Inheritance and molecular characterization of resistance to AHAS- inhibiting herbicides in rapeseed显示文摘Rapeseed is a very important oil crop in China;however,its production is challenging due to the absence of effective weed management strategies.This is predominantly because of a shortage of herbicide resistance genes.Acetohydroxyacid synthase(AHAS) herbicides inhibit AHAS,a key enzyme involved in branched-chain amino acid synthesis that is required for plant growth.A rapeseed line designated M342 with AHAS herbicide resistance was developed through seed mutagenesis and was studied to assess the level and mode of inheritance of the resistance and to identify the molecular basis of resistance.M342 possessed a high level of cross-resistance to sulfonylureas(SUs) and imidazolinones(IMIs).This resistance was due to AHAS insensitivity to these herbicides and was inherited as a dominant trait conferred by a single nuclear-encoded gene.Molecular analysis revealed the presence of a Trp574 Leu mutation in M342,and an allele-specific cleaved amplified polymorphic sequence(AS-CAPS) marker was developed and cosegregated with herbicide resistance in the F2,BC1,and BC2 populations.This mutation altered the transcript levels of Bn AHAS1 and Bn AHAS3 in M342 compared with those in the wild type,but it did not affect the agronomic or quality traits.The simple genetic inheritance of this mutation and the availability of the cleaved amplified polymorphic sequence(CAPS) marker and herbicide resistance gene should facilitate the development of herbicide-resistant rapeseed cultivars for effective weed control in China.HU Mao-long PU Hui-ming GAO Jian-qin LONG Wei-hua CHEN Feng ZHOU Xiao-ying ZHANG Wei PENG Qi CHEN Song ZHANG Jie-fu 2017Journal of Integrative Agriculture2017,16,11:11
8Soil Organic Carbon Accumulation Increases Percentage of Soil Olsen-P to Total P at Two 15-Year Mono-Cropping Systems in Northern China显示文摘Soil organic carbon(SOC) and soil Olsen-P are key soil fertility indexes but information on their relationships is limited particularly under long-term fertilization. We investigated the relationships between SOC and the percentage of soil Olsen-P to total P(PSOPTP) under six different 15-yr(1990-2004) long-term fertilizations at two cropping systems in northern China. These fertilization treatments were(1) unfertilized control(control);(2) chemical nitrogen(N);(3) N plus chemical P(NP);(4) NP plus chemical potassium(NPK);(5) NPK plus animal manure(NPKM) and(6) high NPKM(hNPKM). Compared with their initial values in 1989 at both sites, during the 11th to 15th fertilization years annual mean SOC contents were significantly increased by 39.4-47.0% and 58.9-93.9% at Gongzhuling, Jilin Province, and Urumqi, Xinjiang, China, under the two NPKM fertilizations, respectively, while no significant changes under the no-P or chemical P fertilization. During the 11th to 15th fertilization years, annual mean PSOPTP was respectively increased by 2.6-4.2 and 5.8-14.1 times over the initial values under the two chemical P fertilizations and the two NPKM fertilizations, but was unchanged in their initial levels under the two no-P fertilizations at both sites. Over the 15-yr long-term fertilization SOC significantly positively correlated with PSOPTP(r2=0.55-0.79, P<0.01). We concluded that the combination of chemical P plus manure is an effective way to promote SOC accumulation and the percentage of soil Olsen-P to total P at the two mono-cropping system sites in northern China.SHEN Pu HE Xin-hua XU Ming-gang ZHANG Hui-min PENG Chang GAO Hong-jun LIU Hua XU Yong-mei QIN Song XIAO Hou-jun 2014Journal of Integrative Agriculture2014,13,3:10
9Trends in herbgenomics显示文摘From Shen Nong's Herbal Classic(Shennong Bencao Jing) to the Compendium of Materia Medica(Bencao Gangmu) and the first scientific Nobel Prize for the mainland of China, each milestone in the historical process of the development of traditional Chinese medicine(TCM) involves screening, testing and integrating. After thousands of years of inheritance and development,herbgenomics(bencaogenomics) has bridged the gap between TCM and international advanced omics studies, promoting the application of frontier technologies in TCM. It is a discipline that uncovers the genetic information and regulatory networks of herbs to clarify their molecular mechanism in the prevention and treatment of human diseases. The main theoretical system includes genomics, functional genomics, proteomics, transcriptomics, metabolomics, epigenomics, metagenomics, synthetic biology, pharmacogenomics of TCM, and bioinformatics, among other fields. Herbgenomics is mainly applicable to the study of medicinal model plants, genomic-assisted breeding, herbal synthetic biology, protection and utilization of gene resources, TCM quality evaluation and control, and TCM drug development. Such studies will accelerate the application of cutting-edge technologies, revitalize herbal research, and strongly promote the development and modernization of TCM.Tianyi Xin Yu Zhang Xiangdong Pu Ranran Gao Zhichao Xu Jingyuan Song 2019Science China(Life Sciences)2019,62,3:10
10Comparative Genome Analysis of Scutellaria baicalensis and Scutellaria barbata Reveals the Evolution of Active Flavonoid Biosynthesis显示文摘Scutellaria baicalensis(S.baicalensis)and Scutellaria barbata(S.barbata)are common medicinal plants of the Lamiaceae family.Both produce specific flavonoid compounds,including baicalein,scutellarein,norwogonin,and wogonin,as well as their glycosides,which exhibit antioxidant and antitumor activities.Here,we report chromosome-level genome assemblies of S.baicalensis and S.barbata with quantitative chromosomal variation(2 n=18 and 2 n=26,respectively).The divergence of S.baicalensis and S.barbata occurred far earlier than previously reported,and a whole-genome duplication(WGD)event was identified.The insertion of long terminal repeat elements after speciation might be responsible for the observed chromosomal expansion and rearrangement.Comparative genome analysis of the congeneric species revealed the species-specific evolution of chrysin and apigenin biosynthetic genes,such as the S.baicalensis-specific tandem duplication of genes encoding phenylalanine ammonia lyase and chalcone synthase,and the S.barbata-specific duplication of genes encoding 4-Co A ligase.In addition,the paralogous duplication,colinearity,and expression diversity of CYP82 D subfamily members revealed the functional divergence of genes encoding flavone hydroxylase between S.baicalensis and S.barbata.Analyzing these Scutellaria genomes reveals the common and species-specific evolution of flavone biosynthetic genes.Thus,these findings would facilitate the development of molecular breeding and studies of biosynthesis and regulation of bioactive compounds.Zhichao Xu Ranran Gao Xiangdong Pu Rong Xu Jiyong Wang Sihao Zheng Yan Zeng Jun Chen Chunnian He Jingyuan Song 2020Genomics, Proteomics & Bioinformatics2020,18,3:10
11Boosting electrocatalytic water splitting via metal-metalloid combined modulation in quaternary Ni-Fe-P-B amorphous compound显示文摘Design and synthesis of highly efficient and cost-effective bifunctional catalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)remain a big challenge.Herein,a quaternary amorphous nanocompound Ni-Fe-P-B has been synthesized by a facile,scalable co-reduction method.The Ni-Fe-P-B exhibits high electrocatalytic activity and outstanding durability for both HER and OER,delivering a current density of 10 mA·cm^-2 at overpotentials of 220 and 269 mV,respectively.When loaded on carbon fiber paper(CFP)as a bifunctional catalyst,the Ni-Fe-P-B@CFP electrode requires a low cell voltage of 1.58 V to obtain 10 mA·cm^-2 for overall water splitting with negligible recession over 60 h.The excellent catalytic performances of Ni-Fe-P-B mainly benefit from the metal-metalloid combined composition modulation and the unique amorphous structure.This work provides new insights into the design of robust bifunctional catalysts for water splitting,and may promote the development of multicomponent amorphous catalysts.Wukui Tang Xiaofang Liu Ya Li Yanhui Pu Yao Lu Zhiming Song Qiang Wang Ronghai Yu Jianglan Shui 2020Nano Research2020,13,2:8
12Association of Overlapped and Un-overlapped Comorbidities with COVID-19 Severity and Treatment Outcomes: A Retrospective Cohort Study from Nine Provinces in China显示文摘Objective Several COVID-19 patients have overlapping comorbidities. The independent role of each component contributing to the risk of COVID-19 is unknown, and how some non-cardiometabolic comorbidities affect the risk of COVID-19 remains unclear.Methods A retrospective follow-up design was adopted. A total of 1,160 laboratory-confirmed patients were enrolled from nine provinces in China. Data on comorbidities were obtained from the patients’ medical records. Multivariable logistic regression models were used to estimate the odds ratio(OR) and 95% confidence interval(95% CI) of the associations between comorbidities(cardiometabolic or non-cardiometabolic diseases), clinical severity, and treatment outcomes of COVID-19.Results Overall, 158(13.6%) patients were diagnosed with severe illness and 32(2.7%) had unfavorable outcomes. Hypertension(2.87, 1.30–6.32), type 2 diabetes(T2 DM)(3.57, 2.32–5.49),cardiovascular disease(CVD)(3.78, 1.81–7.89), fatty liver disease(7.53, 1.96–28.96), hyperlipidemia(2.15, 1.26–3.67), other lung diseases(6.00, 3.01–11.96), and electrolyte imbalance(10.40, 3.00–26.10)were independently linked to increased odds of being severely ill. T2 DM(6.07, 2.89–12.75), CVD(8.47,6.03–11.89), and electrolyte imbalance(19.44, 11.47–32.96) were also strong predictors of unfavorable outcomes. Women with comorbidities were more likely to have severe disease on admission(5.46,3.25–9.19), while men with comorbidities were more likely to have unfavorable treatment outcomes(6.58, 1.46–29.64) within two weeks.Conclusion Besides hypertension, diabetes, and CVD, fatty liver disease, hyperlipidemia, other lung diseases, and electrolyte imbalance were independent risk factors for COVID-19 severity and poor treatment outcome. Women with comorbidities were more likely to have severe disease, while men with comorbidities were more likely to have unfavorable treatment outcomes.MA Yan ZHU Dong Shan CHEN Ren Bo SHI Nan Nan LIU Si Hong FAN Yi Pin WU Gui Hui YANG Pu Ye BAI Jiang Feng CHEN Hong CHEN Li Ying FENG Qiao GUO Tuan Mao HOU Yong HU Gui Fen HU Xiao Mei HU Yun Hong HUANG Jin HUANG Qiu Hua HUANG Shao Zhen JI Liang JIN Hai Hao LEI Xiao LI Chun Yan LI Min Qing LI Qun Tang LI Xian Yong LIU Hong De LIU Jin Ping LIU Zhang MA Yu Ting MAO Ya MO Liu Fen NA Hui WANG Jing Wei SONG Fang Li SUN Sheng WANG Dong Ting WANG Ming Xuan WANG Xiao Yan WANG Yin Zhen WANG Yu Dong WU Wei WU Lan Ping XIAO Yan Hua XIE Hai Jun XU Hong Ming XU Shou Fang XUE Rui Xia YANG Chun YANG Kai Jun YUAN Sheng Li ZHANG Gong Qi ZHANG Jin Bo ZHANG Lin Song ZHAO Shu Sen ZHAO Wan Ying ZHENG Kai ZHOU Ying Chun ZHU Jun Teng ZHU Tian Qing ZHANG Hua Min WANG Yan Ping WANG Yong Yan 2020Biomedical and Environmental Sciences2020,33,12:8
13Seasonal variability of the zooplankton community in the southwest of the Huanghai Sea (Yellow Sea) Cold Water Mass显示文摘Samples were collected with a plankton net in the four seasonal cruises during 2006-2007 to study the seasonal variability of the zooplankton community in the southwest part of Huanghai Sea Cold Water Mass (HSCWM, Yellow Sea Cold Water Mass). The spatial and temporal variations of zooplankton species composition, biomass, abundance and biodiversity were examined. A total of 122 zooplankton species and 30 pelagic larvae were identified in the four cruises. Calanus sinicus and Aidanosagitta crassa were the most dominant species, and Themisto gaudichaudi and Euphausia pacifica were widely distributed in the HSCWM area. The spatial patterns of non-gelatinous zooplankton (removing the high water content groups) were similar to those of the total zooplankton biomass in autumn, but different significantly in the other three seasons. The seasonal means of zooplankton biomass in spring and summer were much higher than that in autumn and winter. The total zooplankton abundance averaged 283.5 ind./m^3 in spring (highest), 192.5 ind./m^3 in summer, 165.5 ind./m^3 in autumn and 65.9 ind./m^3 in winter (lowest), and the non-gelatinous groups contributed the most total abundance. Correlation analysis suggests that the non-gelatinous zooplankton biomass and abundance had a significant positive correlation in the whole year, but the relationship was insignificant between the total zooplankton biomass and abundance in spring and summer. The diversity index H of zooplankton community averaged 1.88 in this study, which was somewhat higher than historical results. Relatively low diversity in summer was related to the high dominance of Calanus sinicus, probably due to the strongest effect of the HSCWM in this season.LIU Ping SONG Hongjun WANG Xiao WANG Zongling PU Xinming ZHU Mingyuan 2012Acta Oceanologica Sinica2012,31,4:8
14Interferon-armed RBD dimer enhances the immunogenicity of RBD for sterilizing immunity against SARS-CoV-2显示文摘Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has caused a global crisis,urgently necessitating the development of safe,efficacious,convenient-to-store,and low-cost vaccine options.A major challenge is that the receptor-binding domain(RBD)-only vaccine fails to trigger long-lasting protective immunity if used alone for vaccination.Shiyu Sun Yueqi Cai Tian-Zhang Song Yang Pu Lin Cheng Hairong Xu Jing Sun Chaoyang Meng Yifan Lin Haibin Huang Fang Zhao Silin Zhang Yu Gao Jian-Bao Han Xiao-Li Feng Dan-Dan Yu Yalan Zhu Pu Gao Haidong Tang Jincun Zhao Zheng Zhang Jiaming Yang Zhenxiang Hu Yang-Xin Fu Yong-Tang Zheng Hua Peng 2021Cell Research2021,31,9:7
15Hot Working Characteristic of Superaustenitic Stainless Steel 254SMO显示文摘Hot deformation characteristic of superaustenitic stainless steel 254SMO has been studied by isothermal compression testing in the temperature range of 950–1,200 °C and strain rate range of 0.01–10 s-1.The activation energy of 496 kJ/mol was calculated by a hyperbolic-sine type equation over the entire range of strain rates and temperatures.In order to obtain optimum hot working conditions,processing maps consisting of power dissipation map and instability map were constructed at different strains.The power dissipation map exhibits two domains with relatively high efficiencies of power dissipation.The first domain occurs in the temperature range of 990–1,070 °C and the strain rate range of0.01–0.1 s-1.Microstructure observation in this domain indicates the partial dynamic recrystallization(DRX) accompanied with precipitation of tetragonal sigma phase.The second domain occurs in the temperature range of 1,140–1,200 °C and the strain rate range of 0.01–1 s-1with a peak efficiency of power dissipation of 39%,and in this domain,the microstructure observation reveals the full DRX.The instability map shows that flow instability occurs at the temperatures below 1,140 °C and the strain rates above 0.1 s-1.Enxiang Pu Wenjie Zheng Jinzhong Xiang Zhigang Song Han Feng Yuliang Zhu 2014Acta Metallurgica Sinica(English Letters)2014,27,2:6
16Tumor-derived neomorphic mutations in ASXL1 impairs the BAP1-ASXL1-FOXK1/K2 transcription network显示文摘Additional sex combs-like 1(ASXL1)interacts with BRCA1-associated protein 1(BAP1)deubiquitinase to oppose the polycomb repressive complex 1(PRC1)-mediated histone H2A ubiquitylation.Germline BAP1 mutations are found in a spectrum of human malignancies,while ASXL1 mutations recurrently occur in myeloid neoplasm and are associated with poor prognosis.Nearly all ASXL1 mutations are heterozygous frameshift or nonsense mutations in the middle or to a less extent the C-terminal region,resulting in the production of C-terminally truncated mutant ASXL1 proteins.How ASXL1 regulates specific target genes and how the C-terminal truncation of ASXL1 promotes leukemogen-esis are unclear.Here,we report that ASXL1 interacts with forkhead transcription factors FOXK1 and FOXK2 to regulate a subset of FOXK1/K2 target genes.We show that the C-terminally truncated mutant ASXL1 proteins are expressed at much higher levels than the wild-type protein in ASXL1 heterozygous leukemia cells,and lose the ability to interact with FOXK1/K2.Specific deletion of the mutant allele eliminates the expression of C-termi-nally truncated ASXL1 and increases the association of wild-type ASXL1 with BAP1,thereby restoring the expression of BAP1-ASXL1-FOXK1/K2 target genes,particularly those involved in glucose metabolism,oxygen sensing,and JAK-STAT3 signaling pathways.In addition to FOXK1/K2,we also identify other DNA-bind-ing transcription regulators including transcription factors(TFs)which interact with wild-type ASXL1,but not C-terminally truncated mutant.Our results suggest that ASXL1 mutations result in neomorphic alleles that contribute to leukemogenesis at least in part through dominantly inhibiting the wild-type ASXL1 from interacting with BAP1 and thereby impairing the function of ASXL1-BAP1-TF in regulating target genes and leukemia cell growth.Yu-Kun Xia Yi-Rong Zeng Meng-Li Zhang Peng Liu Fang Liu Hao Zhang Chen-Xi He Yi-Ping Sun Jin-Ye Zhang Cheng Zhang Lei Song Chen Ding Yu-Jie Tang Zhen Yang Chen Yang Pu Wang Kun-Liang Guan Yue Xiong Dan Ye 2021Protein & Cell2021,12,7:6
17Genome-wide identification and analysis of AP2/ERF transcription factors related to camptothecin biosynthesis in Camptotheca acuminata显示文摘Camptotheca acuminata produces camptothecin(CPT),a monoterpene indole alkaloid(MIA)that is widely used in the treatment of lung,colorectal,cervical,and ovarian cancers.Its biosynthesis pathway has attracted significant attention,but the regulation of CPT biosynthesis by the APETALA2/ethylene-responsive factor(AP2/ERF)transcription factors(TFs)remains unclear.In this study,a systematic analysis of the AP2/ERF TFs family in C.acuminata was performed,including phylogeny,gene structure,conserved motifs,and gene expression profiles in different tissues and organs(immature bark,cotyledons,young flower,immature fruit,mature fruit,mature leaf,roots,upper stem,and lower stem)of C.acuminata.A total of 198 AP2/ERF genes were identified and divided into five relatively conserved subfamilies,including AP2(26 genes),DREB(61 genes),ERF(92 genes),RAV(18 genes),and Soloist(one gene).The combination of gene expression patterns in different C.acuminata tissues and organs,the phylogenetic tree,the co-expression analysis with biosynthetic genes,and the analysis of promoter sequences of key enzymes genes involved in CPT biosynthesis pathways revealed that eight AP2/ERF TFs in C.acuminata might be involved in CPT synthesis regulation,which exhibit relatively high expression levels in the upper stem or immature bark.Among these,four genes(Cac AP2/ERF123,Cac AP2/ERF125,Cac AP2/ERF126,and Cac AP2/ERF127)belong to the ERF–B2 subgroup;two genes(Cac AP2/ERF149 and Cac AP2/ERF152)belong to the ERF–B3 subgroup;and two more genes(Cac AP2/ERF095 and Cac AP2/ERF096)belong to the DREB–A6 subgroup.These results provide a foundation for future functional characterization of the AP2/ERF genes to enhance the biosynthesis of CPT compounds of C.acuminata.HU Ya-Ting XU Zhi-Chao TIAN Ya GAO Ran-Ran JI Ai-Jia PU Xiang-Dong WANG Yu LIU Xia SONG Jing-Yuan 2020Chinese Journal of Natural Medicines2020,18,8:5
18Effect of HIV-1 Tat on Secretion of TNF-α and IL-1β by U87 Cells in AIDS Patients with or without AIDS Dementia Complex显示文摘Objective To explore the role of HIV-1 tat gene variations in AIDS dementia complex(ADC) pathogenesis.Methods HIV-1 tat genes derived from peripheral spleen and central basal ganglia of an AIDS patient with ADC and an AIDS patient without ADC were cloned for sequence analysis. HIV-1 tat gene sequence alignment was performed by using CLUSTAL W and the phylogentic analysis was conducted by using Neighbor-joining with MEGA4 software. All tat genes were used to construct recombinant retroviral expressing vector MSCV-IRES-GFP/tat. The MSCV-IRES-GFP/tat was cotransfected into 293T cells with pCMV-VSV-G and pUMVC vectors to assemble the recombinant retrovirus. After infection of gliomas U87 cells with equal amount of the recombinant retrovirus, TNF-α, and IL-1β concentrations in the supernatant of U87 cells were determined with ELISA. Results HIV-1 tat genes derived from peripheral spleen and central basal ganglia of the AIDS patient with ADC and the other one without ADC exhibited genetic variations. Tat variations and amino acid mutation sites existed mainly at Tat protein core functional area(38-47aa). All Tat proteins could induce U87 cells to produce TNF-α and IL-1β, but the level of IL-1β production was different among Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen. The level of Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen were obviously higher than that from the non-ADC patient's basal ganglia. Conclusion Tat protein core functional area(38-47aa) may serve as the key area of enhancing the secretion of IL-1β. This may be related with the neurotoxicity of HIV-1 Tat.ZHAO Li PU Shuang Shuang GAO Wen Hua CHI Yuan Yuan WEN Hong Ling WANG Zhi Yu SONG Yan Yan YU Xue Jie 2014Biomedical and Environmental Sciences2014,27,2:5
19Precipitated phases of superaustenitic stainless steel 654SMO显示文摘The phase diagram of superaustenitic stainless steel 654SMO was calculated by thermodynamic software and the precipitated phases in the specimens aged at 800-1100°C for 1hwere studied by methods of physicochemical phase analysis,scanning electron microscopy and transmission electron microscopy.The results showed that the size of precipitated particles increased with increasing the temperature.The amount of second phases reached the maximum value at 900°C,but decreased above 900°C.There were about eight kinds of precipitated phases in 654SMO includingσphase,Cr_2N,μphase,χphase,Laves phase,M_(23)C_6,M_6C and M_3C,in which theσphase and Cr_2N were the dominant precipitated phases.Zhi-gang Song En-xiang Pu 2017Journal of Iron and Steel Research(International)2017,24,7:5
20Six kilowatt record all-fiberized and narrow-linewidth fiber amplifier with near-diffraction-limited beam quality显示文摘In this work,an all-fiberized and narrow-linewidth fiber amplifier with record output power and near-diffraction-limited beam quality is presented.Up to 6.12 kW fiber laser with the conversion efficiency of approximately 78.8%is achieved through the fiber amplifier based on a conventional step-index active fiber.At the maximum output power,the 3 dB spectral linewidth is approximately 0.86 nm and the beam quality factor is M_(x)^(2)=1.43,M_(y)^(2)=1.36.We have also measured and compared the output properties of the fiber amplifier employing different pumping schemes.Notably,the practical power limit of the fiber amplifier could be estimated through the maximum output powers of the fiber amplifier employing unidirectional pumping schemes.Overall,this work could provide a good reference for the optimal design and potential exploration of high-power narrow-linewidth fiber laser systems.Guangjian Wang Jiaxin Song Yisha Chen Shuai Ren Pengfei Ma Wei Liu Tianfu Yao Pu Zhou 2022High Power Laser Science and Engineering2022,10,4:5
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