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368篇 您的检索式:作者名="Chao Du"
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1Inhibition of SARS-CoV-2 (previously 2019-nCoV) infection by a highly potent pan-coronavirus fusion inhibitor targeting its spike protein that harbors a high capacity to mediate membrane fusion显示文摘The recent outbreak of coronavirus disease(COVID-19)caused by SARS-CoV-2 infection in Wuhan,China has posed a serious threat to global public health.To develop specific anti-coronavirus therapeutics and prophylactics,the molecular mechanism that underlies viral infection must first be defined.Therefore,we herein established a SARS-CoV-2 spike(S)protein-mediated cell-cell fusion assay and found that SARS-CoV-2 showed a superior plasma membrane fusion capacity compared to that of SARS-CoV.We solved the X-ray crystal structure of six-helical bundle(6-HB)core of the HR1 and HR2 domains in the SARS-CoV-2 S protein S2 subunit revealing that several mutated amino acid residues in the HR1 domain may be associated with enhanced interactions with the HR2 domain.We previously developed a pan-coronavirus fusion inhibitor,EK1,which targeted the HR!domain and could inhibit infection by divergent human coronaviruses tested,including SARS-CoV and MERS-CoV.Here we generated a series of lipopeptides derived from EK1 and found that EK1C4 was the most potent fusion inhibitor against SARS-CoV-2 S protein-mediated membrane fusion and pseudovirus infection with IC50s of 1.3 and 15.8 nM,about 241-and 149-fold more potent than the original EK1 peptide,respectively.EK1C4 was also highly effective against membrane fusion and infection of other human coronavirus pseudoviruses tested,including SARS-CoV and MERS-CoV,as well as SARSr-CoVs,and potently inhibited the replication of 5 live human coronaviruses examined,including SARS-CoV-2.Intranasal application of EK1C4 before or after challenge with HCoV-OC43 protected mice from infection,suggesting that EK1C4 could be used for prevention and treatment of infection by the currently circulating SARS-CoV-2 and other emerging SARSr-CoVs.Shuai Xia Meiqin Liu Chao Wang Wei Xu Qiaoshuai Lan Siliang Feng Feifei Qi Linlin Bao Lanying Du Shuwen Liu Chuan Qin Fei Sun Zhengli Shi Yun Zhu Shibo Jiang Lu Lu 2020Cell Research2020,30,4:81
2Epidemiology of respiratory distress and the illness severity in late preterm or term infants: a prospective multi-center study显示文摘背景呼吸悲痛的严厉与新生的预后被联系。这研究试图近来探索临床的特征,治疗学的干预和短期的结果要求了的 preterm 或术语婴儿呼吸支持,并且比较不同的病严厉评价 tools.Methods 的用法第三级的医院里的七个新生的特别护理单位被招募。从 2008 年 11 月到 2009 年 10 月,在 34 星期的 gestational 出生的出生不满一月的婴儿变老,在 72 小时年龄承认了,为呼吸支持要求连续积极航线压力(CPAP ) 或机械通风被注册。包括人口统计的变量,内在的疾病,复杂并发症,治疗学的干预和短期的结果的临床的数据是镇定的。所有婴儿被在风险新生儿(橡树子) 的尖锐照顾划分成三个组呼吸分数 5, 5-8,和 8 .Results 在学习时期, 503 新生的迟了的 preterm 或学期婴儿期间要求了呼吸支持。吝啬的 gestational 年龄是(36.8 ? 湥牧獯敳 ? 湩 ? 眠吗?MA Xi'ao-lu XU Xue-feng CHEN Chao YAN Chao-ying LIU Ya-ming LIU Ling XIONG Hong SUN Hui-qing LAI Jian-pu YI Bin SHI Jing-yun DU Li-zhong 2010Chinese Medical Journal2010,,20:31
3Genetic correction of p-thalassemia patient-specific iPS cells and its use in improving hemoglobin production in irradiated SCID mice显示文摘Yixuan Wang Chen-Guang Zheng Yonghua Jiang Jiqin Zhang Jiayu Chen Chao Yao Qingguo Zhao Sheng Liu Ke Chen Juan Du Ze Yang Shaorong Gao 2012Cell Research2012,22,4:27
4Suppression of Jasmonic Acid-Mediated Defense by Viral-Inducible MicroRNA319 Facilitates Virus Infection in Rice显示文摘MicroRNAs (miRNAs ) 是植物开发和主人病毒相互作用的枢轴的调节的人。然而,角色和涉及病毒的感染和主人危险性的特定的 miRNAs 的行动模式仍然保持大部分不清楚。在这研究,我们给那瑞斯看引起 miR319 的增加的累积,但是减少的破旧绝技病毒(RRSV ) 感染调整 miR319 的 TCP (TEOSINTE BRANCHED/CYCLOIDEA/PCF ) 的表示基因,特别 TCP21,在米饭植物。转基因的米饭植物 overexpressing miR319 或 downregulating TCP21 展出了像疾病的显型并且与野类型的植物比较显示出显著地更高的危险性到 RRSV。相反,仅仅温和的疾病症状在感染 RRSV 的线 overexpressing TCP21 并且特别在转基因的植物 overexpressing 被观察 miR319 抵抗的 TCP21。miR319 的 RRSV 感染和 overexpression 在米饭与 JA 生合成和信号相关的基因的 downregulated 表示一起引起了减少的内长的 jasmonic 酸(JA ) 层次。然而,有甲基 jasmonate 的米饭植物的治疗减轻了 RRSV 引起并且减少了病毒累积的疾病症状。一起拿,我们的结果建议由在米饭的 RRSV 感染的 miR319 的正式就职压制调停 JA 的防卫便于病毒感染和症状开发。Chao Zhang Zuomei Ding Kangcheng Wu Liang Yang Yang Li Zhen Yang Shan Shi Xiaojuan Liu Shanshan Zhao Zhirui Yang Yu Wang Luping Zheng Juan Wei Zhenguo Du Aihong Zhang Hongqin Miao Yi Li Zujian Wu Jianguo Wu 2016Molecular Plant2016,9,9:27
5Survey of Electric Vehicle Charging Load and Dispatch Control Strategies显示文摘WANG Xifan SHAO Chengcheng WANG Xiuli DU Chao 2013中国电机工程学报2013,33,1:19
6Platelet Distribution Width on Admission Predicts In-Stent Restenosis in Patients with Coronary Artery Disease and Type 2 Diabetes Mellitus Treated with Percutaneous Coronary Intervention显示文摘Cheng-Ping Hu Yu Du Yong Zhu Chao Shi Zheng Qin Ying-Xin Zhao 2018Chinese Medical Journal2018,,7:18
7Age-related macular degeneration: Epidemiology, genetics, pathophysiology, diagnosis, and targeted therapy显示文摘Age-related macular degeneration (AMD) is a complex eye disorder and is the leading cause of incurable blindness worldwide in the elderly. Clinically, AMD initially affects the central area of retina known as the macula and it is classified as early stage to late stage (advanced AMD). The advanced AMD is classified into the nonexudative or atrophic form (dry AMD) and the exudative or neovascular form (wet AMD). More severe vision loss is typically associated with the wet form. Multiple genetic factors, lipid metabolism, oxidative stress and aging, play a role in the etiology of AMD. Dysregulation in genetic to AMD is established to 46%–71% of disease contribution, with CFH and ARMS2/HTRA1 to be the two most notable risk loci among the 103 identified AMD associated loci so far. Chronic cigarette smoking is the most proven consistently risk living habits for AMD. Deep learning algorithm has been developed based on image recognition to distinguish wet AMD and normal macula with high accuracy. Currently, anti-vascular endothelial growth factor (VEGF) therapy is highly effective at treating wet AMD. Several new generation AMD drugs and iPSC-derived RPE cell therapy are in the clinical trial stage and are promising to improve AMD treatment in the near future.Yanhui Deng Lifeng Qiao Mingyan Du Chao Qu Ling Wan Jie Li Lulin Huang 2022Genes & Diseases2022,9,1:17
8Perioperative transcutaneous electrical acupoint stimulation for improving postoperative gastrointestinal function:A randomized controlled trial显示文摘Background:Postoperative gastrointestinal dysfunction(PGD)is one of the most common complications in patients undergoing major abdominal surgery.Acupuncture has been used widely in gastrointestinal diseases due to its effectiveness and minimally invasive nature.Objective:This study evaluated the efficacy of using transcutaneous electrical acupoint stimulation(TEAS)during the surgery and postoperative recovery in patients with gastric and colorectal surgery for improving postoperative gastrointestinal function.Design,setting,participants and interventions:A total of 280 patients undergoing abdominal surgery were stratified by type of surgery(i.e.,gastric or colorectal surgery)and randomly allocated into the TEAS group(group T)or the sham group(group S).Patients in group T received TEAS at LI4,PC6,ST36 and ST37.Patients in group S received pseudo-TEAS at sham acupoints.The stimulation was given from 30 min before anesthesia until the end of surgery.The same treatment was performed at 9 am on the 1st,2nd and 3rd days after surgery,until the recovery of flatus in patients.Main outcome measures:The primary outcome was the time to the first bowel motion,as detected by auscultation.The secondary outcomes included the first flatus and ambulation time,changes of perioperative substance P(SP),incidence of PGD,postoperative pain,postoperative nausea and vomiting(PONV)and some economic indicators.Results:The time to first bowel motion,first flatus and first ambulation in group T was much shorter than that in group S(P<0.01).In patients undergoing colorectal surgery,the concentration of SP was lower in group T than in group S on the third day after the operation(P<0.05).The average incidence of PGD in all patients was 25%,and the frequency of PGD was significantly lower in group T than in group S(18.6%vs.31.4%,respectively;P<0.05).TEAS treatment(odds ratio=0.498;95%confidence interval:0.232–0.786)and type of surgery were relevant factors for the development of PGD.Postoperative pain score and PONV occurrence were significantly lower in group T(P<0.01).Postoperative hospitalization days and the resulting cost to patients were greatly reduced in the TEAS group(P<0.01).Conclusion:Perioperative TEAS was able to promote the recovery of postoperative gastrointestinal function,reduce the incidence of PGD and PONV.The concentration of SP was decreased by TEAS treatment,which indicates that the brain-gut axis may play a role in how TEAS regulates gastrointestinal function.Trial registration:Chinese Clinical Trial Registry,Chi CTR1900023263.Wen-jing Li Chao Gao Li-xin An Yu-wei Ji Fu-shan Xue Yi Du 2021Journal of Integrative Medicine2021,19,3:16
9MiR-139-5p inhibits migration and invasion of colorectal cancer by downregulating AMFR and NOTCH1显示文摘MicroRNAs (miRNAs ) 由抑制最近在 carcinogenesis 和转移在我们 non-protein-coding RNA 的角色的理解带给卓见的 posttranscriptional 施加功能。在这研究,我们在 CRC 在 colorectal 癌症(CRC ) 和它的潜在的临床的应用程序描述了函数和 miR-139-5p 的分子的机制。我们发现 miR-139-5p 是显著地, CRC 与邻近的 noncancerous 纸巾(NCT ) 相比取样的在 73.8% 的 downregulated,和减少的 miR-139-5p 与穷人被联系预后。功能的分析证明 miR-139-5p 的那个宫外的表达式在 vivo 在 vitro 和转移压制了 CRC 房间移植和侵略。机械学的调查表明 miR-139-5p 由指向 AMFR 和 NOTCH1 压制 CRC 房间侵略和转移。二基因 phenocopied 击倒 CRC 上的 miR-139-5p 的禁止的效果转移。而且,二基因的蛋白质层次与 NCT 相比是在 CRC 样品的 upregulated,并且相反地与 miR-139-5p 表示相关。增加的 NOTCH1 蛋白质表示与 CRC 病人的差的预后被相关。一起,我们的数据显示 miR-139-5p 为 CRC 是潜在的肿瘤 suppressor 和预示的因素,并且指向 miR-139-5p 可以镇压 CRC 的转移并且改善幸存。Mingxu Song Yuan Yin Jiwei Zhang Binbin Zhang Zehua Bian Chao Quan Leyuan Zhou Yaling Hu Qifeng Wang Shujuan Ni Bojian Fei Weili Wang Xiang Du Dong Hua Zhaohui Huang 2014Protein & Cell2014,5,11:14
10On-treatment monitoring of liver fibrosis with serum hepatitis B core-related antigen in chronic hepatitis B显示文摘BACKGROUND Non-invasive evaluation for liver fibrosis is clinically important,especially in patients with undetectable hepatitis B virus(HBV)DNA treated with nucleoside analogs.AIM To clarify the monitoring power of hepatitis B core-related antigen(HBcrAg)for hepatic histologic changes in patients with chronic hepatitis B(CHB)treated with entecavir.METHODS This prospective multicenter study used multiple ordinal and multivariate logistics regression analysis to assess variables associated with Ishak fibrosis score and regression for fibrosis regression,respectively,in 403 CHB patients,including 374 with entecavir for 72 weeks(291 underwent paired liver biopsy)and 29 as controls.RESULTS Level of HBcrAg correlated negatively with liver fibrosis staging(γ=-0.357,P<0.001)in hepatitis B e antigen(HBeAg)-positive patients,and positively with liver fibrosis staging in HBeAg-negative patients.Higher HBcrAg concentration was associated with younger age,HBeAg positive status,high HBV DNA loads,high level of hepatitis B surface antigen(HBsAg)and higher necroinflammation,but not with HBV genotype.Serum concentration of HBcrAg,basal core promoter/precore(BCP/PC)mutant,quantitation of HBsAg(qHBsAg)and platelet counts were independently associated with Ishak fibrosis score on multiple ordinal regression.HBV DNA was undetectable in 88.37%of patients treated with entecavir at week 72,while their level of HBcrAg was still detectable.A greater reduction in post-treatment HBcrAg concentration was associated with the regression of hepatic fibrosis and histological improvement.HBcrAg concentration>6.33 log IU/mL at baseline and logarithmic reduction>1.03 log IU/mL at week 72 were associated with a higher chance of regression of liver fibrosis and histological improvement,respectively.CONCLUSION HBcrAg level is associated with liver fibrosis progression.HBcrAg is an excellent monitor of hepatic histological changes,especially in CHB patients treated with nucleoside analogs.Xiu-Juan Chang Chao Sun Yan Chen Xiao-Dong Li Zu-Jiang Yu Zheng Dong Wen-Lin Bai Xiao-Dong Wang Zhi-Qin Li Da Chen Wen-Juan Du Hao Liao Qi-Yu Jiang Li-Jun Sun Yin-Yin Li Cui-Hong Zhang Dong-Ping Xu Yong-Ping Chen Qin Li Yong-Ping Yang 2019World Journal of Gastroenterology2019,25,32:12
11Geodynamic Background of Intracontinental Cenozoic Alkaline Volcanic Rocks in Laojiezi, Western Yangtze Craton: Constraints from Sr-Nd-Hf-O Isotopes显示文摘The Laojiezi alkaline volcanic rocks, which are located in the intraplate region of the Yangtze craton, coincide with the formation of the Jinshajiang-Ailaoshan-Red River alkaline rock belt. Although this belt has been widely studied by geologists because of its porphyry-related Pb-Ag-Au polymetallic deposit and geotectonic location, the material sources of this belt are still debate. Whole-rock analyses show that these rocks have high total alkali contents(3.73–11.08 wt%), and their aluminum saturation index(ASI) values widely vary from 0.82 to 3.07, which comprise a metaluminous-peraluminous magma series. These rocks are characterized by high K(K2 O/Na2 O>1) and low Ti and Mg contents; enrichment in large-ion lithophile elements, such as Rb, Ba, K and light rare earth elements; and depletion in high field strength elements, such as Ta, Nb, P, and Ti. These rocks exhibit moderate Eu(Eu/Eu*=0.86–1.04) and Ce(Ce/Ce*=0.63–0.96) anomalies. Their(87 Sr/86 Sr)i, εNd(t), zircon εHf(t) and δ18 O values range from 0.70839 to 0.71013, from-10.16 to-12.45, from-19.6 to-5.8, and from 5.69‰ to 8.54‰, respectively, and their Nd and Hf two-stage model ages(TDM2) are 1.67–1.86 Ga and 1.27–2.02 Ga, respectively. These data reflect the primary partial melting of Paleoproterozoic to Mesoproterozoic lower crust with minor residual continental lithospheric mantle and supracrustal metasediments. The lithosphere was likely thickened along the southeastern margin of the Tibetan Plateau following the Indian-Asian continentcontinent collision(65–41 Ma). During the post-collision phase(36–16 Ma), the transition from a compressional to extensional setting triggered the convective removal of the over-thickened CLM beneath the Yangtze craton, which led to the upwelling of asthenospheric materials. This process created alkali-rich and high-K magma through the partial melting of the thickened lower crust. Magma that carried Cu-Au-Pb-Ag minerals was emplaced by strike-slip motion along the E-to W-or ENE-to WSWtrending tectonically weak zone, finally forming an alkaline porphyry Cu-Au-Pb-Ag polymetallic deposit.YAN Qinggao JIANG Xiaojun LI Chao ZHOU Limin WANG Zhongqiang Sultan Baig SHER QU Wenjun DU ANDao 2018Acta Geologica Sinica(English Edition)2018,92,6:12
12Effects of dietary yeast nucleotides on growth, non-specific immunity intestine growth and intestinal microbiota of juvenile hybrid tilapia Oreochromis niloticus ♀ × Oreochromis aureus ♂显示文摘This study investigated the effect of dietary supplementation of yeast nucleotides on the growth, nonspecific immunity, intestine growth and intestinal microbiota of juvenile hybrid tilapia. Tilapia(initial average weight of 8.02 g) was fed test diets supplemented with a yeast-originated nucleotide mixture(0,0.15, 0.30, 0.60, and 1.20 g/100 g diet) for 8 weeks. Fish fed the diet with 0.60% nucleotide had significantly higher weight gain than the control group(P < 0.05). Feed efficiency was improved in the fish fed 0.60 and 1.20% nucleotide compared with that in the control group. The optimal doses of nucleotides supplementation for growth and feed efficiency of fish were determined as 0.63 and 0.81%, respectively.Intestinal growth was improved in the 0.30 and 0.60% groups, as indicated by significant increase in intestine length. The fish fed 0.60 and 1.20% nucleotide showed higher super oxide dismutase(SOD)activity and lower malondialdehyde(MDA) level in the liver than the control fish, indicating enhancement of the anti-oxidant status. Serum lysozyme activity was significantly increased in the 0.15 and 0.3%nucleotide supplementation groups, suggesting an enhancement effect on the non-specific immune response. Lastly, dietary nucleotides supplementation exerted moderate influence on the intestinal microbiota of hybrid tilapia. A reduction in the cumulative abundance of putative butyrate-producing species was observed in the intestinal microbiota of fish fed diets with 0.60% nucleotide compared with the control, implying an interaction between dietary nucleotides and butyrate production. Briefly, dietary supplementation with 0.60% nucleotide improve the growth performance, immune activity and intestine growth in tilapia.Li Xu Chao Ran Suxu He Jianli Zhang Jun Hu Yalin Yang Zhenyu Du Yanou Yang Zhigang Zhou 2015Animal Nutrition2015,,3:12
13Nissen fundoplication vs proton pump inhibitors for laryngopharyngeal reflux based on p H-monitoring and symptom-scale显示文摘AIM To compare the outcomes between laparoscopic Nissen fundoplication(LNF)and proton pump inhibitors(PPIs)therapy in patients with laryngopharyngeal reflux(LPR)and typeⅠhiatal hernia diagnosed by oropharyngeal p H-monitoring and symptom-scale assessment.METHODS From February 2014 to January 2015,70 patients who were diagnosed with LPR and type I hiatal hernia and referred for symptomatic assessment,oropharyngeal p H-monitoring,manometry,and gastrointestinal endoscopy were enrolled in this study.All of the patients met the inclusion criteria.All of the patients underwent LNF or PPIs administration,and completed a2-year follow-up.Patients’baseline characteristics and primary outcome measures,including comprehensive and single symptoms of LPR,PPIs independence,and satisfaction,and postoperative complications were assessed.The outcomes of LNF and PPIs therapy were analyzed and compared. RESULTS There were 31 patients in the LNF group and 39patients in the PPI group.Fifty-three patients(25 in the LNF group and 28 in the PPI group)completed reviews and follow-up.Oropharyngeal p H-monitoring parameters were all abnormal with high acid exposure,a large amount of reflux,and a high Ryan score,associated reflux symptom index(RSI)score.There was a significant improvement in the RSI and LPR symptom scores after the 2-year follow-up in both groups(P<0.05),as well as typical symptoms of gastroesophageal reflux disease.Improvement in the RSI(P<0.005)and symptom scores of cough(P=0.032),mucus(P=0.011),and throat clearing(P=0.022)was significantly superior in the LNF group to that in the PPI group.After LNF and PPIs therapy,13 and 53 patients achieved independence from PPIs therapy(LNF:44.0%vs PPI:7.14%,P<0.001)during follow-up,respectively.Patients in the LNF group were more satisfied with their quality of life than those in the PPI group(LNF:62.49±28.68 vs PPI:44.36±32.77,P=0.004).Body mass index was significantly lower in the LNF group than in the PPI group(LNF:22.2±3.1kg/m^2 vs PPI:25.1±2.9 kg/m^2,P=0.001).CONCLUSION Diagnosis of LPR should be assessed with oropharyngeal p H-monitoring,manometry,and the symptom-scale.LNF achieves better improvement than PPIs for LPR with type I hiatal hernia.Chao Zhang Zhi-Wei Hu Chao Yan Qiong Wu Ji-Min Wu Xing Du Dian-Gang Liu Tao Luo Fei Li Zhong-Gao Wang 2017World Journal of Gastroenterology2017,23,19:12
14Diagnostic value of elevated serum carbohydrate antigen 199 level in acute cholangitis secondary to choledocholithiasis显示文摘AIM To investigate the diagnostic value of abnormal serum carbohydrate antigen 199(CA199) level in acute cholangitis secondary to choledocholithiasis.METHODS In this retrospective cohort study, the clinical data of 727 patients with choledocholithiasis admitted to the Third Affiliated Hospital of Zunyi Medical College from June 2011 to June 2017 were collected. Among these patients, 258 patients had secondary acute cholangitis and served as observation group, and the remaining 569 choledocholithiasis patients served as the control group. Serum liver function indexes and tumor markers were detected in both groups, and the receiver operating characteristic(ROC) curves were constructed for markers showing statistical significances. The cutoff value, sensitivity, and specificity of each marker were calculated according to the ROC curves. RESULTS The results of liver function tests showed no significant differences between the two groups(P > 0.05). Tumor markers including serum CA125, CA153, carcinoembryonic antigen, and alpha fetoprotein levels were also not significantly different(P > 0.05); however, the serum CA199 level was significantly higher in the observation group than in the control group(P < 0.05). The ROC curve analysis showed that the area under the curve was 0.885(95%CI: 0.841-0.929) for CA199, and the cutoff value of 52.5 kU/L had the highest diagnostic accuracy, with a sensitivity of 86.8% and a specificity of 81.6%.CONCLUSION Abnormally elevated serum CA199 level has an important value in the diagnosis of acute cholangitis secondary to choledocholithiasis. It may be a specific inflammatory marker for acute cholangitis.Yong Mei Li Chen Ci-Jun Peng Jun Wang Peng-Fei Zeng Guo-Xing Wang Wen-Ping Li Yan-Qing Luo Chao Du Kai Liu Kun Xiong Kai Leng Chun-Lin Feng Ji-Hu Jia 2018World Journal of Clinical Cases2018,6,11:11
15Understanding Relationship Between Accessibility and Economic Growth:A Case Study from China(1990–2010)显示文摘China′s economy and transport infrastructure have both experienced rapid development since 1978, and especially since 1990. Today, China is the second-largest economic entity in terms of GDP and has the largest high-speed rail(HSR) network and the second-largest expressway network in the world. This paper explores the relationship between accessibility and economic growth in China from 1990 to 2010. In the study, the basic research units include 333 prefecture-level cities and four municipalities. We explore a bivariate analysis framework of accessibility and economic growth, and their increase rates, to examine this relationship using long-term panel data. The results indicate that, first, accessibility and economic growth show a significant positive relationship using both cross-section and panel data, while the increase rate in accessibility and GDP indicate no significant relationship using cross-section data and a poor significant relationship using panel data. Second, the distributions of local advantage are uneven. Cities with low local advantage with respect to accessibility and GDP are mainly located in China′s eastern coastal region or the provincial capitals, while those with low local advantage in terms of their increase rates are located in the western region. Third, as China′s economic growth and transport networks have evolved, the distribution of local advantage shows little change in terms of accessibility and GDP, but a greater change in terms of their increase rates, which is largely influenced by the distribution of expressway and HSR networks.JIAO Jingjuan WANG Jiaoe JIN Fengjun DU Chao 2016Chinese Geographical Science2016,26,6:10
16DDIT4 promotes gastric cancer proliferation and tumorigenesis through the p53 and MAPK pathways显示文摘Background:Gastric cancer(GC)is one of the most common malignancies worldwide,particularly in China.DNA damage-inducible transcript 4(DDIT4)is a mammalian target of rapamycin inhibitor and is induced by various cellular stresses;however,its critical role in GC remains poorly understood.The present study aimed to investigate the poten-tial relationship and the underlying mechanism between DDIT4 and GC development.Methods:We used western blotting,real-time polymerase chain reaction,and immunohistochemical or immunoflu-orescence to determine DDIT4 expression in GC cells and tissues.High-content screening,cell counting kit-8 assays,colony formation,and in vivo tumorigenesis assays were performed to evaluate cell proliferation.Flow cytometry was used to investigate cell apoptosis and cell cycle distribution.Results:DDIT4 was upregulated in GC cells and tissue.Furthermore,downregulating DDIT4 in GC cells inhibited proliferation both in vitro and in vivo and increased 5-fluorouracil-induced apoptosis and cell cycle arrest.In contrast,ectopic expression of DDIT4 in normal gastric epithelial cells promoted proliferation and attenuated chemosensitivity.Further analysis indicated that the mitogen-activated protein kinase and p53 signaling pathways were involved in the suppression of proliferation,and increased chemosensitivity upon DDIT4 downregulation.Conclusion:DDIT4 promotes GC proliferation and tumorigenesis,providing new insights into the role of DDIT4 in the tumorigenesis of human GC.Feng Du Lina Sun Yi Chu Tingyu Li Chao Lei Xin Wang Mingzuo Jiang Yali Min Yuanyuan Lu Xiaodi Zhao Yongzhan Nie Daiming Fan 2018Cancer Communications2018,38,1:10
17Inhibition of Rac1-dependent forgetting alleviates memory deficits in animal models of Alzheimer's disease显示文摘Accelerated forgetting has been identified as a feature of Alzheimer's disease(AD),but the therapeutic efficacy of the manipulation of biological mechanisms of forgetting has not been assessed in AD animal models.Ras-re-lated C3 botulinum toxin substrate 1(Rac1),a small GTPase,has been shown to regulate active forgetting in Drosophila and mice?Here,we showed that Rac1 activity is aberrantly elevated in the hippocampal tissues of AD patients and AD animal models.Moreover,amyloid-beta 42 could induce Rac1 activation in cultured cells.The elevation of Rac1 activity not only accelerated 6-hour spatial memory decay in 3-month-old APP/PS1 mice,but also significantly contributed to severe memory loss in aged APP/PS1 mice.A similar age-dependent Rac1 activity-based memory loss was also observed in an AD fly model.Moreover,inhibition of Rac1 activity could ameliorate cognitive defects and synaptic plasticity in AD animal models.Finally,two novel compounds,identified through behavioral screening of a randomly selected pool of brain permeable small molecules for their positive effect in rescuing memory loss in both fly and mouse models,were found to be capable of inhibiting Rac1 activity.Thus,multiple lines of evidence corroborate in supporting the idea that inhibition of Rac1 activity is effective for treating AD-related memory loss.Wenjuan Wu Shuwen Du Wei Shi Yunlong Liu Ying Hu Zuolei Xie Xinsheng Yao Zhenyu Liu Weiwei Ma Lin Xu Chao Ma Yi Zhong 2019Protein & Cell2019,10,10:10
18Re-Os dating of auriferous pyrite from the Zhenyuan super-large gold deposit in Ailaoshan gold belt,Yunnan Province,Southwestern China显示文摘Zhenyuan gold deposit is the largest super large gold deposit in the Ailaoshan gold belt,but its precise mineralization age is still lack.Re-Os isotopic age of the auriferous pyrite from the Zhenyuan gold deposit was determined by using a high-resolution inductively coupled plasma mass spectrometry(HR-ICP-MS).The pyrite samples were decomposed in carius tubes,Os was separated by distillation and Re was extracted by acetone,respectively.The results show that the Re-Os isochron age is 229±38 Ma(MSWD=2.0,confidence level is 95%),with an initial 187 Os/188 Os value of 0.68±0.24 and a corresponding Os value of 442±91.The Re/Os ratios of the pyrite vary from 40.8 to 100.5.The data suggest that at least one important ore-forming event was occurred during Indosinian epoch,and the ore-forming materials probably derived from mixed sources of crustal and mantle,while the later dominated.The Ailaoshan composite orogen experienced complicated evolutional processes,including formation of Precambrian-Early Paleozoic basement,subduction and orogenesis of Late Paleozoic era,collisional orogenesis of Late Hercynian-Indosinain epoch,and extensional or striking orogenesis of Yanshainan-Cenozoic epoch.The polycycle tectonic evolution and magmatism in this area caused multi-stage and superposition metallization characteristics of the Zhenyuan gold deposit:the mineralization probably occur mainly during the Indosinian collisional orogeny,while the minor gold ores of altered granite-porphyry and altered lamprophyre may be formed in the late superposition metallization.SHI GuiYong SUN XiaoMing PAN WeiJian HU BeiMing QU WenJun DU AnDao LI Chao 2012Chinese Science Bulletin2012,57,35:9
19Chitosan oligosaccharides suppress LPS-induced IL-8 expression in human umbilical vein endothelial cells through blockade of p38 and Akt protein kinases显示文摘Hong-tao LIU Pei HUANG Pan MA Qi-shun LIU Chao YU Yu-guang DU 2011Acta Pharmacologica Sinica2011,32,4:9
20Inconsistent seasonal variation of antibiotics between surface water and groundwater in the Jianghan Plain:Risks and linkage to land uses显示文摘Antibiotics are widely used in humans and animals,but their transformation from surface water to groundwater and the impact of land uses on them remain unclear.In this study,14 antibioticswere systematically surveyed in a complex agricultural area in Central China.Results indicated that the selected antibiotic concentrations in surface waters were higher in winter(average:32.7 ng/L)than in summer(average:17.9 ng/L),while the seasonal variation in groundwaters showed an opposite trend(2.2 ng/L in dry winter vs.8.0 ng/L in summer).Macrolides were the predominant antibiotics in this area,with a detected frequency of over 90%.A significant correlation between surface water and groundwater antibiotics was only observed in winter(R^(2)=0.58).This study further confirmed the impact of land uses on these contaminants,with optimal buffer radii of 2500 m in winter and 500 m in summer.Risk assessment indicated that clarithromycin posed high risks in this area.Overall,this study identified the spatiotemporal variability of antibiotics in a typical agricultural area in Central China and revealed the impact of land uses on antibiotic pollution in aquatic environments.Xi Liu Zhi Wang Lu Zhang Weiying Fan Chao Yang Enhua Li Yun Du Xuelei Wang 2021Journal of Environmental Sciences2021,33,11:9
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