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5274篇 您的检索式:作者名="Peng M"
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1功能的限制的积极选择而非松驰在鸡驯服期间驾驶视觉的进化显示文摘是由达尔文,注意了鸡有所有鸟,而是国内鸡和他们的野祖先之间的有趣的进化差别的最大的 phenotypic 差异,红 Junglefowl,是他们的比较地更弱的视觉。存在理论建议在国内鸡之中的减少的视觉英勇反映功能的限制的松驰在识别负责的内在的基因机制的视觉,而是证据上驾驶的变化因为这个变化决定性地没被描绘。这里,国内鸡的染色体宽的分析和红 Junglefowl 染色体为涉及视觉的发展的断然选择的基因显示出重要丰富。关于为在视网膜的这些基因的 mRNA 表示的水平国内鸡和他们的野祖先之间有重要差别。涉及视觉的发展的众多的另外的基因也在在国内鸡和他们的野祖先之间的 mRNA 表示显示出重要差别,特别地为与 phototransduction 和光敏电阻器开发联系的基因,例如 RHO (视紫红质) , GUCA1A, PDE6B 和 NR2E3。最后,我们在视觉描绘了 VIT 基因的潜在的角色,它在村庄鸡的视网膜经历了积极选择和 downregulated 表示。总的来说,我们的结果建议净化选择的那种积极选择,而非松驰,在国内鸡贡献了视觉的进化。怀有更弱的视觉的国内鸡的祖先可能显示出减少的害怕回答和警戒,使他们更安逸无意识地被选择或驯养。Ming-Shan Wang Rong-wei Zhang Ling-Yan Su Yah Li Min-Sheng Peng He-Qun Liu Lin Zeng David M Irwin Jiu-Lin Du Yong-Gang Yao Dong-Dong Wu Ya-Ping Zhang 2016Cell Research2016,26,5:15
2Role of CD56-expressing immature biliary epithelial cells in biliary atresia显示文摘AIM: To analyze the clinical and pathological parameters and expression of the neural cell adhesion molecule(CD56) in patients with biliary atresia(BA).METHODS: Established clinical laboratory markers of hepatic function, including enzyme activity, protein synthesis, and bilirubin metabolism, were evaluated in patients with BA and compared with those in patients with choledochal cysts and neonatal hepatitis. Pathological changes in tissue morphology and fibrosis were examined by histological and tissue collagen staining. Immunohistochemical staining for the biliary epithelial cell markers CD56 and CK19 together with the Notch signaling related molecules Notch1 and Notch2 was performed in the context of alterations in the structure of intrahepatic biliary ducts.RESULTS: Differences in some clinical laboratoryparameters among the three diseases examined were observed, but they did not correlate with the pathological classification of fibrosis in BA. Immunohistochemical staining showed the presence of CD56-positive immature bile ducts in most patients(74.5%) with BA but not in patients with choledochal cysts or neonatal hepatitis. The number of CD56-expressing cells correlated with disease severity, with more positive cells present in the later stages of liver damage(81.8% vs 18.2%). Furthermore, bile plugs were mainly found in CD56-positive immature biliary ducts. Notch signaling was a key regulatory pathway in biliary duct formation and played a role in tissue fibrosis. Notch1 was co-expressed in CD56-positive cells, whereas Notch2 was found exclusively in blood vessels in the portal area of patients with BA. CONCLUSION: The maturation of biliary epithelial cells and the expression of Notch may play a role in the pathogenesis of BA.Rui-Zhong Zhang Jia-Kang Yu Jiao Peng Feng-Hua Wang Hai-Ying Liu Vincent CH Lui John M Nicholls Paul KH Tam Jonathan R Lamb Yan Chen Hui-Min Xia 2016World Journal of Gastroenterology2016,22,8:8
3Convergent genomic signatures of high-altitude adaptation among domestic mammals显示文摘Abundant and diverse domestic mammals living on the Tibetan Plateau provide useful materials for investigating adaptive evolution and genetic convergence.Here,we used 327 genomes from horses,sheep,goats,cattle,pigs and dogs living at both high and low altitudes,including 73 genomes generated for this study,to disentangle the genetic mechanisms underlying local adaptation of domestic mammals.Although molecular convergence is comparatively rare at the DNA sequence level,we found convergent signature of positive selection at the gene level,particularly the EPAS1 gene in these Tibetan domestic mammals.We also reported a potential function in response to hypoxia for the gene C10 orf67,which underwent positive selection in three of the domestic mammals.Our data provide an insight into adaptive evolution of high-altitude domestic mammals,and should facilitate the search for additional novel genes involved in the hypoxia response pathway.Dong-Dong Wu Cui-Ping Yang Ming-Shan Wang Kun-Zhe Dong Da-Wei Yan Zi-Qian Hao Song-Qing Fan Shu-Zhou Chu Qiu-Shuo Shen Li-Ping Jiang Yan Li Lin Zeng He-Qun Liu Hai-Bing Xie Yun-Fei Ma Xiao-Yan Kong Shu-Li Yang Xin-Xing Dong Ali Esmailizadeh David M Irwin Xiao Xiao Ming Li Yang Dong Wen Wang Peng Shi Hai-Peng Li Yue-Hui Ma Xiao Gou Yong-Bin Chen Ya-Ping Zhang 2020National Science Review2020,7,6:7
4Interleukin-1α, 6 regulate the secretion of vascular endothelial growth factor A, C in pancreatic cancer显示文摘Vascular endothelial growth factor (VEGF, namely VEGF-A) is an angiogenic polypeptide and VEGF-C is a lymphangiogenic polypeptide that has been implicated in cancer growth, invasion and metastasis. Several cytokines and growth factors play an important part in cancer progression. These cytokines and growth factors are the principal mediators of cancer cells-stromal cell interaction , which is critical for invasion of cancer cells to the surrounding tissues and metastatic dissemination to distant organs. In this study, we studied VEGF-A, C expression in cultured human pancreatic cancer cell lines and whether the presence of VEGF-A, C in the cell lines is regulated by cytokines interleukin-lct (EL-1α), and interleukin-6 (IL-6). METHODS: We used Northern blot and Western blot methods to analyze expression of the gene and protein of VEGF-A, C in all 6 tested cell lines (ASPC-1, CAPAN-1, MIA-PaCa-2, PANC-1, COLO-357 and T3M4) respectively. To analyze what is the regulator for this VEGF-A, C expression in pancreatic cancer,we used the reverse transcription -polymerase chain reaction (RT-PCR) method to analyze VEGF-A, C expression in cultured human pancreatic cancer cell lines (CAPAN-1 and COLO-357) under the stimulation with IL-1α (10μg/L) or IL-6 (100 μg/L). RESULTS:Northern blot analysis revealed the presence of the 4.1-kb VEGF-A mRNA transcript and 2.4-kb VEGF-C mRNA transcript in all 6 tested cell lines. Immunoblotting with highly specific anti-VEGF-A, anti-VEGF-C antibody revealed the presence of a molecular weight of 43-kDa VEGF-A protein and 55-kDa VEGF-C protein in all the cell lines. RT-PCR analysis revealed the levels of the VEGF-A and VEGF-C gene were 1-2 fold and a 1-fold increase in the COLO-357 cell line by stimulation with IL-la, however, no effect was found in the CAPAN-1 cell line. The levels of the VEGF-A and VEGF-C gene were 2-5 fold and a 1-fold increase in the CAPAN-1 cell line by stimulation with IL-6, but, no effect was found in the COLO-357 cell line. CONCLUSION:These findings suggested that the expression of VEGF-A, C and their regulation by IL-1α, IL-6 in pancreatic cancer contributes to the lymphatic and distant metastasis and the disease progression.Department of Hepatobiliary Surgery (Tang RF, Zhang FR, Peng L, Wang SX, Xiao Y and Zhang M) and Department of Dermatology (Wang SX), 4th Hospital, Hebei Medical University, Shijiazhuang 050011, China 2005Hepatobiliary & Pancreatic Diseases International2005,4,3:6
5Protective role of PI3-kinase/Akt/eNOS signaling in mechanical stress through inhibition of p38 mitogenactivated protein kinase in mouse lung显示文摘Xin-qi PENG Mahendra DAMARLA Jarrett SKIRBALL Stephanie NONAS Xiao-ying WANG Eugenia J HAN Emile J HASAN Xuan CAO Adel BOUEIZ Rachel DAMICO Rubin M TUDER Alfred M SClUTO Dana R ANDERSON Joe GNGARCIA David A KASS Paul M HASSOUN Jun-tian ZHANG 2010Acta Pharmacologica Sinica2010,31,2:6
6The role of MicroRNAs in human cancer显示文摘MicroRNAs(miRNAs)are endogenous,small non-coding RNAs that function in regulation of gene expression.Compelling evidences have demonstrated that miRNA expression is dysregulated in human cancer through various mechanisms,including amplification or deletion of miRNA genes,abnormal transcriptional control of miRNAs,dysregulated epigenetic changes and defects in the miRNA biogenesis machinery.MiRNAs may function as either oncogenes or tumor suppressors under certain conditions.The dysregulated miRNAs have been shown to affect the hallmarks of cancer,including sustaining proliferative signaling,evading growth suppressors,resisting cell death,activating invasion and metastasis,and inducing angiogenesis.An increasing number of studies have identified miRNAs as potential biomarkers for human cancer diagnosis,prognosis and therapeutic targets or tools,which needs further investigation and validation.In this review,we focus on how miRNAs regulate the development of human tumors by acting as tumor suppressors or oncogenes.Yong Peng Carlo M Croce 2016Signal Transduction and Targeted Therapy2016,1,1:5
7Effects of six years of simulated N deposition on gross soil N transformation rates in an old-growth temperate forest显示文摘Elevated atmospheric nitrogen(N) deposition has been detected in many regions of China, but its effects on soil N transformation in temperate forest ecosystems are not well known. We therefore simulated N deposition with four levels of N addition rate(N0, N30, N60, and N120) for6 years in an old-growth temperate forest in Xiaoxing'an Mountains in Northeastern China. We measured gross N transformation rates in the laboratory using ^(15)N tracing technology to explore the effects of N deposition on soil gross N transformations taking advantage of N deposition soils. No significant differences in gross soil N transformation rates were observed after 6 years of N deposition with various levels of N addition rate. For all N deposition soils, the gross NH_4^+ immobilization rates were consistently lower than the gross N mineralization rates,leading to net N mineralization. Nitrate(NO_3^-) was primarily produced via oxidation of NH_4^+(i.e., autotrophic nitrification), whereas oxidation of organic N(i.e., heterotrophic nitrification) was negligible. Differences between the quantity of ammonia-oxidizing bacteria and ammonia-oxidizing archaea were not significant for any treatment, which likely explains the lack of a significant effect on gross nitrification rates. Gross nitrification rates were much higher than the total NO_3^- consumption rates,resulting in a build-up of NO_3^-, which highlights the high risk of N losses via NO_3^- leaching or gaseous N emissions from soils. This response is opposite that of typical N-limited temperate forests suffering from N deposition,suggesting that the investigated old-growth temperate forest ecosystem is likely to approach N saturation.Peng Tian Jinbo Zhang Christoph Müller Zucong Cai Guangze Jin 2018Journal of Forestry Research2018,29,3:3
8Immunotherapy of tumors with autologous tumor-derived heat shock protein preparations显示文摘Tamura Y Peng P Liu K Daou M Srivastava PK 0,,:3
9Characterization of proteolipid protein-peptide-specific CD_4^+ T cell of experimental allergic encephalomyelitis in Biozzi AB/H miceYong Peng and Chih pin Liu Department of Neurology, The Third Affiliated Hospital, Hunan Medical University , Changsha 410013, China (Peng Y) Division of Immunology, Beckman Research Institute, City of Hope National M edical Center, Duarte, CA 9 2002Chinese Medical Journal2002,,4:3
10中国大陆居民对中风的危险因素、征兆、应急处理及信息获取等相关认知的调查研究(英文)显示文摘目的:以中国大陆居民为受访对象,就中风的认知和预防进行问卷调查,以推进预防中风的健康教育活动。方法:选择大陆两个主要城市(武汉和成都)公园、商场及其他公共场所的居民为对象,进行一项有关中风知识标准化的横截面问卷调查,内容包括风险因素、征兆、应急救援和信息获取。结果:846人参与问卷调查,其中55%为男性,45%为女性,平均年龄45.7岁。收集数据表明,28%的受调查居民认为高血压是主要的危险因素,头晕(29%)和麻木(20.2%)是中风常见的征兆。所有数据都显示,当中风时人们采取急救措施是有必要的。家庭/朋友(21%)及媒体(电视占19.5%,报纸占17.7%)是中风信息传播的主要途径。结论:应重视推广中国大陆地区有关中风预防的低成本高效率的教育项目,尤其是中风危险因素、征兆、应急处理和信息获取途径的相关项目。开拓多元化的途径,包括开展促进公众健康的活动,通过医疗专家和医疗设施开展健康教育活动向广大民众宣传中风常识和预防措施。Zhenyi LI Peng WANG Alice Y M JONES Elizabeth DEAN 2015康复学报2015,0,2:3
11Ly49 receptors activate angiogenic mouse DBA+ uterine natural killer cells显示文摘Patricia DA Lima Megan M Tu Mir Munir A Rahim Annie R Peng B Anne Croy Andrew P Makrigiannis 2014Cellular & Molecular Immunology2014,11,5:3
12Hollow mesoporous titania microsphere with low shell thickness/diameter ratio and high photocatalysis显示文摘Jianing Liu Gaowen Zhang Wei Ao Kan Yang Shaoxian Peng Christel Müller-Goymann 2012Applied Surface Science2012,,20:2
13Effect of closure of live poultry markets on poultry-to-person transmission of avian influenza A H7N9 virus: an ecological study显示文摘Hongjie Yu Joseph T Wu Benjamin J Cowling Qiaohong Liao Vicky J Fang Sheng Zhou Peng Wu Hang Zhou Eric H Y Lau Danhuai Guo Michael Y Ni Zhibin Peng Luzhao Feng Hui Jiang Huiming Luo Qun Li Zijian Feng Yu Wang Weizhong Yang Gabriel M Leung 2013The Lancet2013,,:2
14Hepatocytes isolated from neoplastic liver-immunomagnetic purging as a new source for transplantation显示文摘AIM: To investigate whether hepatocytes isolated from macroscopically normal liver during hepatic resection for neoplasia could provide a novel source of healthy hepatocytes, including the development of reliable protocols for malignant cells removal from the hepatocyte preparation. METHODS: Hepatocytes were procured from resected liver of 18 patients with liver tumors using optimised digestion and cell-enrichment protocols. Suspensions of various known quantities of the HT-29 tumor cell line and patient hepatocytes were treated or not with Ep-CAM-antibody-coated immunomagnetic beads in order to investigate the effi cacy of tumor-purging by immunomagnetic depletion, using a semi-quantitative RT-PCR method developed to detect tumor cells. Immunomagnetic bead-treated or bead-untreated tumor cell-hepatocyte suspensions were transplanted intra-peritoneally in Balb/C nude mice to assess the rates of tumor development. RESULTS: Mean viable hepatocyte yield was 9.3 x 106 cells per gram of digested liver with mean viability of 70.5%. Immunomagnetic depletion removed tumor cells to below the RT-PCR detection-threshold of 1 tumor cell in 106 hepatocytes, representing a maximum tumor purging efficacy of greater than 400 000-fold. Transplanted, immunomagnetic bead-purged tumor cell-hepatocyte suspensions did not form peritonealtumors in Balb/C nude mice. Co-transplantation of hepatocytes with tumor cells did not increase tumorigenesis of the tumor cells. CONCLUSION: Immunomagnetic depletion appears to be an effective method of purging contaminating tumor cells to below threshold for likely tumorigenesis. Along with improved techniques for isolation of large numbers of viable hepatocytes, normal liver resected for neoplasia has potential as another clinically useful source of hepatocytesAravin Gunasegaram Javed Akhter Peng Yao Loreena A Johnson Stephen M Riodan David L Morris 2008World Journal of Gastroenterology2008,14,32:2
15New and efficient large-update interior-point method for linear optimization 显示文摘PENG J M ROOS C TERLAKY T 2001J Comput Technol2001,4,:2
16Adaptive guaranteed cost control of systems with uncertain parameters显示文摘Chang M S L Peng T K C 1972IEEE Transactions on Automatic Control1972,17,4:2
17Characterization of spermidine hydroxycinnamoyl transferases from eggplant (Solanum melongena L.) and its wild relative Solanum richardii Dunal显示文摘Eggplant produces a variety of hydroxycinnamic acid amides(HCAAs)that have an important role in plant development and adaptation to environmental changes.In this study,we identified and characterized a spermidine hydroxycinnamoyl transferase(SHT)from eggplant(Solanum melongena)and its wild relative S.richardii,designated as SmSHT and SrSHT,respectively.SmSHT was abundant in flowers and fruits,whereas the level of SrSHT was remarkably low in all tissues.Heat-shock/drought treatment stimulated the expression of SmSHT in both leaves and fruits,indicating its involvement in plant stress response.Both SHT polypeptides had extremely high identity with just five amino-acid substitutions.Recombinant SmSHT catalyzed the synthesis of mono-,bi-and tri-acylated polyamines.Using caffeoyl-CoA as the acyl donor,SmSHT preferred spermidine as the acyl acceptor.When spermidine was the acyl acceptor,the donor preference order for SmSHT was caffeoyl-CoA>feruloyl-CoA>ρ-coumaroyl-CoA.SrSHT exhibited the same substrate specificity as SmSHT,yet exhibited significantly higher catalytic activity than SmSHT.For example,under caffeoyl-CoA and spermidine,Kcat of SrSHT was 37.3%higher than SmSHT.Molecular modeling suggests that five amino-acid substitutions in SrSHT result in four alterations in their predicted 3D structures.In particular,the conserved Lys402 adjacent to the DFGWG motif,and Cys200 in the crossover loop in SmSHT were replaced by Glu and Ser in SrSHT.These substitutions may contribute to the enhanced activity in SrSHT.Our study provides a platform to generate HCAA rich fruits for eggplant and other solanaceous crops.Hui Peng Tianbao Yang Bruce D Whitaker Frances Trouth Lingfei Shangguan Wen Dong Wayne M Jurick 2016Horticulture Research2016,3,1:2
18Prevalence and associated metabolic factors of fatty liver disease in the elderly显示文摘Zhongli Wang Ming Xu Jianhong Peng Li Jiang Zhengguo Hu Hua Wang Shiqing Zhou Rui Zhou Michael Hultstr?m En Yin Lai 2013Experimental Gerontology2013,,8:2
19Neutral Pd(II) and Ni (II) aeetylide catalysts for the polymerization of methyl methaerylate 显示文摘SUN H M SHEN Q PENG X G 2002Catalysis Letters2002,80,12:1
20Integrated Computer Program for Simulation of Meshing and Contact of Gear Drives 显示文摘LITVIN F L DONNO M D PENG A 2000Computer Methods in Applied Mechanics and Engineering2000,181,13:1
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