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| 1 | Assessment of neovascularization within carotid plaques in patients with ischemic stroke显示文摘AIM:To assess neovascularization within human ca-rotid atherosclerotic soft plaques in patients with isch-emic stroke.METHODS:Eighty-one patients with ischemic stroke and 95 patients without stroke who had soft athero-sclerotic plaques in the internal carotid artery were studied.The thickest soft plaque in each patient was examined using contrast-enhanced ultrasound.Time-intensity curves were collected from 5 s to 3 min after contrast injection.The neovascularization within the plaques in the internal carotid artery was evaluated using the ACQ software built into the scanner by 2 of the experienced investigators who were blinded to the clinical history of the patients.RESULTS:Ischemic stroke was present in 7 of 33 patients(21%) with grade Ⅰ plaque,in 14 of 51 pa-tients(28%) with grade Ⅱ plaque,in 26 of 43 patients(61%) with grade Ⅲ plaque,and in 34 of 49 patients(69%) with grade Ⅳ plaque(P < 0.001 comparing grade Ⅳ plaque with grade I plaque and with grade Ⅱ plaque and P = 0.001 comparing grade Ⅲ plaque with grade Ⅰ plaque and with grade Ⅱ plaque).Analysis of the time intensity curves revealed that patients with ischemic stroke had a significantly higher intensity of enhancement(IE) than those without ischemic stroke(P < 0.01).The wash-in time(WT) of plaque was signifi-cantly shorter in stroke patients(P < 0.05).The sensi-tivity and specificity for IE in the plaque were 82% and 80%,respectively,and for WT were 68% and 74%,respectively.There was no significant difference in the peak intensity or time to peak between the 2 groups.CONCLUSION:This study shows that the higher the grade of plaque enhancement,the higher the risk of ischemic stroke.The data suggest that the presence of neovascularization is a marker for unstable plaque. | Wilbert S Aronow Chandra K Nair David Cosgrove | 2010 | World Journal of Cardiology2010，2，4： | 29 |
| 2 | 12味止血中药对脂多糖诱导小鼠巨噬细胞产生一氧化氮的抑制作用显示文摘目的:研究12味止血中药对脂多糖(LPS)诱导小鼠巨噬细胞产生一氧化氮(NO)的抑制作用,并探讨其止血机制。方法:以1μg.mL-1LPS刺激小鼠巨噬细胞RAW264.7,22h后以Griess法测定NO的终产物亚硝酸盐的含量,观察LPS对NO生成的影响。结果:12味止血药均可抑制LPS诱导小鼠巨噬细胞RAW264.7中NO的生成。三七、地榆、仙鹤草、槐花、艾叶、蒲黄、侧柏叶及白茅根的抑制作用显著(P<0.05)。结论:本实验为12味止血中药对脂多糖诱导小鼠巨噬细胞产生NO的抑制作用提供了一定的理论依据。 | 廖晖 Linda K Banbury David N Leach | 2007 | 中国药房2007，18，9： | 27 |
| 3 | Q&P钢热处理工艺的开发进展(英文)显示文摘Q&P钢的工艺概念已提出了有些年了,它作为一种热处理工艺,生产的组织具有马氏体和富C的亚稳残余奥氏体。工艺包括:控制淬火形成部分的马氏体,然后热处理以使C从过饱和的马氏体中转移到残余奥氏体中。潜在的应用包括具有好的成型性和抗断裂的高强度钢。应用该工艺可生产薄板和厚板,以及用从长锻材生产热处理元件,甚至于铸铁。自2003年一直在实验室研究,早期的工作结果已有发表。近期的研究主要集中于机理方面的细节。国际范围的独立团队在此研究领域也有很多进展。 | John G Speer David K Matlock | 2009 | 世界钢铁2009，9，1： | 21 |
| 4 | Out of southern East Asia: the natural history of domestic dogs across the world显示文摘 | Guo-Dong Wang Weiwei Zhai He-Chuan Yang Lu Wang LioZhong Yan-Hu Liu Ruo-Xi Fan Ting-Ting Yin Chun-Ling Zhu Andrei D Poyarkov David M Irwin Marjo K Hytonen Hannes Lohi Chung-I Wu Peter Savolainen Ya-Ping Zhang | 2016 | Cell Research2016，26，1： | 16 |
| 5 | Endoscopy and polyps-diagnostic and therapeutic advances in management显示文摘Despite multiple efforts aimed at early detection through screening, colon cancer remains the third leading cause of cancer-related deaths in the United States, with an estimated 51000 deaths during 2013 alone. The goal remains to identify and remove benign neoplastic polyps prior to becoming invasive cancers. Polypoid lesions of the colon vary widely from hyperplastic, hamartomatous and inflammatory to neoplastic adenomatous growths. Although these lesions are all benign, they are common, with up to one-quarter of patients over 60 years old will develop pre-malignant adenomatous polyps. Colonoscopy is the most effective screening tool to detect polyps and colon cancer, although several studies have demonstrated missed polyp rates from 6%-29%, largely due to variations in polyp size. This number can be as high as 40%, even with advanced (> 1 cm) adenomas. Other factors including sub-optimal bowel preparation, experience of the endoscopist, and patient anatomical variations all affect the detection rate. Additional challenges in decision-making exist when dealing with more advanced, and typically larger, polyps that have traditionally required formal resection. In this brief review, we will explore the recent advances in polyp detection and therapeutic options. | Scott R Steele Eric K Johnson Bradley Champagne Brad Davis Sang Lee David Rivadeneira Howard Ross Dana A Hayden Justin A Maykel | 2013 | World Journal of Gastroenterology2013，19，27： | 16 |
| 6 | Factors associated with time to laparoscopic cholecystectomy for acute cholecystitis显示文摘AIM: To determine patient and process of care factors associated with performance of timely laparoscopic cholecystectomy for acute cholecystitis. METHODS: A retrospective medical record review of 88 consecutive patients with acute cholecystitis was conducted. Data collected included demographic data, co-morbidities, symptoms and physical findings at presentation, laboratory and radiological investigations, length of stay, complications, and admission service (medical or surgical). Patients not undergoing cholecystectomy during this hospitalization were excluded from analysis. Hierarchical generalized linear models were constructed to assess the association of pre-operative diagnostic procedures, presenting signs, and admitting service with time to surgery.RESULTS: Seventy cases met inclusion and exclusion criteria, among which 12 were admitted to the medical service and 58 to the surgical service. Mean ± SD time to surgery was 39.3 ± 43 h, with 87% of operations performed within 72 h of hospital arrival. In the adjusted models, longer time to surgery was associated with number of diagnostic studies and endoscopic retrograde cholangio-pancreatography (ERCP, P = 0.01) as well with admission to medical service without adjustment for ERCP (P < 0.05). Patients undergoing both magnetic resonance cholangiopancreatography (MRCP) and computed tomography (CT) scans experienced the longest waits for surgery. Patients admitted to the surgical versus medical service underwent surgery earlier (30.4 ± 34.9 vs 82.7 ± 55.1 h, P < 0.01), had less post-operative complications (12% vs 58%, P < 0.01), and shorter length of stay (4.3 ± 3.4 vs 8.1 ± 5.2 d, P < 0.01).CONCLUSION: Admission to the medical service and performance of numerous diagnostic procedures, ERCP, or MRCP combined with CT scan were associated with longer time to surgery. Expeditious performance of ERCP and MRCP and admission of medically stable patients with suspected cholecystitis to the surgical service to speed up time to surgery should be considered. | Chris N Daniak David Peretz Jonathan M Fine Yun Wang Alan K Meinke William B Hale | 2008 | World Journal of Gastroenterology2008，14，7： | 13 |
| 7 | More anxious than depressed:prevalence and correlates in a 15-nation study of anxiety disorders in people with type 2 diabetes mellitus显示文摘Background Anxiety disorder, one of the highly disabling, prevalent and common mental disorders, is known to be more prevalent in persons with type 2 diabetes mellitus (T2DM) than the general population, and the comorbid presence of anxiety disorders is known to have an impact on the diabetes outcome and the quality of life. However, the information on the type of anxiety disorder and its prevalence in persons with T2DM is limited. Aims To assess the prevalence and correlates of anxiety disorder in people with type 2 diabetes in different countries. Methods People aged 18-65 years with diabetes and treated in outpatient settings were recruited in 15 countries and underwent a psychiatric interview with the Mini-International Neuropsychiatric Interview. Demographic and medical record data were collected. Results A total of 3170 people with type 2 diabetes (56.2% women;with mean (SD) duration of diabetes 10.01 (7.0) years) participated. The overall prevalence of anxiety disorders in type 2 diabetic persons was 18%;however, 2.8% of the study population had more than one type of anxiety disorder. The most prevalent anxiety disorders were generalised anxiety disorder (8.1%) and panic disorder (5.1%). Female gender, presence of diabetic complications, longer duration of diabetes and poorer glycaemic control (HbA1c levels) were significantly associated with comorbid anxiety disorder. A higher prevalence of anxiety disorders was observed in Ukraine, Saudi Arabia and Argentina with a lower prevalence in Bangladesh and India. Conclusions Our international study shows that people with type 2 diabetes have a high prevalence of anxiety disorders, especially women, those with diabetic complications, those with a longer duration of diabetes and poorer glycaemic control. Early identification and appropriate timely care of psychiatric problems of people with type 2 diabetes is warranted. | Santosh K Chaturvedi Shayanth Manche Gowda Helal Uddin Ahmed Fahad D Alosaimi Nicola Andreone Alexey Bobrov Viola Bulgari Giuseppe Carra Gianluca Castelnuovo Giovanni de Girolamo Tomasz Gondek Nikola Jovanovic Thummala Kamala Andrzej Ki Nebojsa Lalic Dusica Lecic-Tosevski Fareed Minhas Victoria Mutiso David Ndetei Golam Rabbani Suntibenchakul Somruk Sathyanarayana Srikanta Rizwan Taj Umberto Valentini Olivera Vukovic Wolfgang Wolwer Larry Cimino Arie Nouwen Cathy Lloyd Norman Sartorius | 2019 | General Psychiatry2019，32，4： | 11 |
| 8 | Rotational assisted endoscopic retrograde cholangiopancreatography in patients with reconstructive gastrointestinal surgical anatomy显示文摘AIM: To evaluate the success rates of performing therapy utilizing a rotational assisted enteroscopy device in endoscopic retrograde cholangiopancreatography(ERCP) in surgically altered anatomy patients. METHODS: Between June 1, 2009 and November 8, 2012, we performed 42 ERCPs with the use of rotational enteroscopy for patients with altered anatomy(39 with gastric bypass Roux-en-Y, 2 with Billroth Ⅱ gastrectomy, and 1 with hepaticojejunostomy associated with liver transplant). The indications for ERCP were: choledocholithiasis: 13 of 42(30.9%), biliary obstruction suggested on imaging: 20 of 42(47.6%), suspected sphincter of Oddi dysfunction: 4 of 42(9.5%), abnormal liver enzymes: 1 of 42(2.4%), ascending cholangitis: 2 of 42(4.8%), and bile leak: 2 of 42(4.8%). All procedures were completed with the Olympus SIF-Q180 enteroscope and the Endo-Ease Discovery SB overtube produced by Spirus Medical. RESULTS: Successful visualization of the major ampulla was accomplished in 32 of 42 procedures(76.2%). Cannulation of the bile duct was successful in 26 of 32 procedures reaching the major ampulla(81.3%). Successful therapeutic intervention was completed in 24 of 26 procedures in which the bileduct was cannulated(92.3%). The overall intention to treat success rate was 64.3%. In terms of cannulation success, the intention to treat success rate was 61.5%. Ten out of forty two patients(23.8%) required admission to the hospital after procedure for abdominal pain and nausea, and 3 of those 10 patients(7.1%) had a diagnosis of post-ERCP pancreatitis. The average hospital stay was 3 d.CONCLUSION: It is reasonable to consider an attempt at rotational assisted ERCP prior to a surgical intervention to alleviate biliary complications in patients with altered surgical anatomy. | Majed El Zouhairi James B Watson Svetang V Desai David K Swartz Alejandra Castillo-Roth Mahfuzul Haque Paul S Jowell Malcolm S Branch Rebecca A Burbridge | 2015 | World Journal of Gastrointestinal Endoscopy2015，7，3： | 10 |
| 9 | 汽车用钢的最新研究进展显示文摘为满足提高燃油效率及汽车'轻量化'等方面持续的需求,学术界及工业领域一直都很重视钢铁及其替代材料的研发,这两类材料之间的竞争始终十分激烈。对汽车用钢在北美的研究现状进行了概述,并重点介绍了几种冷轧和热轧汽车用钢的研究进展及其生产情况。新一代先进高强钢的发展将依然令人关注并充满机遇。 | John G Speer David K Matlock Emmanuel de Moor Grant A Thomas 周澍(译) 李晟(校) | 2013 | 世界钢铁2013，，5： | 10 |
| 10 | Total pancreatectomy and islet autotransplantation: A decade nationwide analysis显示文摘AIM: To investigate outcomes and predictors of inhospital morbidity and mortality after total pancreatectomy(TP) and islet autotransplantation. METHODS: The nationwide inpatient sample(NIS) database was used to identify patients who underwent TP and islet autotransplantation(IAT) between 2002-2012 in the United States. Variables of interest were inherent variables of NIS database which included demographic data(age, sex, and race), comorbidities(such as diabetes mellitus, hypertension, and deficiency anemia), and admission type(elective vs nonelective). The primary endpoints were mortality and postoperative complications according to the ICD-9 diagnosis codes which were reported as the second to 25 th diagnosis of patients in the database. Risk adjusted analysis was performed to investigate morbidity predictors. Multivariate regression analysis was used to identify predictors of in-hospital morbidity.RESULTS: We evaluated a total of 923 patients who underwent IAT after pancreatectomy during 2002-2012. Among them, there were 754 patients who had TP + IAT. The most common indication ofsurgery was chronic pancreatitis(86%) followed by acute pancreatitis(12%). The number of patients undergoing TP + IAT annually significantly increased during the 11 years of study from 53 cases in 2002 to 155 cases in 2012. Overall mortality and morbidity of patients were 0% and 57.8 %, respectively. Postsurgical hypoinsulinemia was reported in 42.3% of patients, indicating that 57.7% of patients were insulin independent during hospitalization. Predictors of inhospital morbidity were obesity [adjusted odds ratio(AOR): 3.02, P = 0.01], fluid and electrolyte disorders(AOR: 2.71, P < 0.01), alcohol abuse(AOR: 2.63, P < 0.01), and weight loss(AOR: 2.43, P < 0.01). CONCLUSION: TP + IAT is a safe procedure with no mortality, acceptable morbidity, and achieved high rate of early insulin independence. Obesity is the most significant predictor of in-hospital morbidity. | Reza Fazlalizadeh Zhobin Moghadamyeghaneh Aram N Demirjian David K Imagawa Clarence E Foster Jonathan R Lakey Michael J Stamos Hirohito Ichii | 2016 | World Journal of Transplantation2016，6，1： | 9 |
| 11 | The promise of γδ T cells and the γδ T cell receptor for cancer immunotherapy显示文摘γ δT 房间对感染和恶意的转变形成适应有免疫力的回答的重要部分。人的 γ 的分子的目标; δ大部分未知,却最近的 T 房间受体(TCR ) 遗体学习证实了 phosphorylated prenyl 代谢物的识别,在有 CD1 分子和细胞的应力的标记的建筑群的类脂化合物。所有这些分子是各种各样的癌症类型上的 upregulated,强调 γ 的潜在的重要性; δ在癌症 immunosurveillance 的 T 房间分隔空间并且为 γ 的使用铺平道路; δ在癌症治疗的 TCR。由 γ 的 Ligand 识别; δTCR 经常在 T 房间和目标 cells; 上要求 accessory/co-stimulatory 压力分子;这细胞的压力上下文因此提供一对有害自我反应保证不失灵。不同 α βT 房间, γ δ不管 HLA haplotype, T 房间认出他们的目标因此出现使可能性激动为现成,平底锅人口癌症免疫疗法。这里,我们在场人的 γ 的已知的 ligands 的评论; δT 房间并且讨论为癌症治疗利用这些房间的诺言。 | Mateusz Legut David K Cole Andrew K Sewell | 2015 | Cellular & Molecular Immunology2015，12，6： | 9 |
| 12 | 具有低动脉粥样硬化风险特征的专业耐力运动员的亚临床冠状动脉疾病发病率显示文摘研究表明,具有冠状动脉疾病(coronary artery disease,CAD)危险因素的中老年(健将)运动员比久坐个体冠状动脉钙化(coronary artery calcium,CAC)评分更高。尚没有研究评估具有低动脉粥样硬化风险特征的专业运动员的CAD患病率。 | 刘莉 叶鹏 Merghani A Maestrini V Rosmini S Cox AT Dhutia H Bastiaenen R David S Yeo TJ Narain R Malhotra A Papadakis M Wilson MG Tome M AlFakih K Moon JC Sharma S | 2017 | 中华高血压杂志2017，25，6： | 8 |
| 13 | Photochemical smog in China:scientific challenges and implications for air-quality policies显示文摘INTRODUCTION Severe air-pollution events in many parts of China pose a major threat to health and ecosystems[1].China’s air pollution is concentrated to economically developed areas,such as Beijing–Tianjin–Hebei(BTH)and Pearl–River–Delta(PRD)[2,3].The situation has received considerable attention in | Mattias Hallquist John Munthe Min Hu Tao Wang Chak K Chan Jian Gao Johan Boman Song Guo Asa M Hallquist Johan Mellqvist Jana Moldanova Ravi K Pathak Jan BC Pettersson Hakan Pleijel David Simpson Marie Thynell | 2016 | National Science Review2016，3，4： | 8 |
| 14 | 乳腺癌发生模型MCF10各细胞系中APC基因启动子区甲基化及mRNA表达检测显示文摘目的探讨乳腺癌发生模型MCF10中抑癌基因APC启动子区甲基化状态及其对mRNA表达的影响。方法应用甲基化特异性聚合酶链反应(MSP)及双亚硫酸钠基因测序技术检测MCF10模型的乳腺增生细胞系MCF10A、癌前细胞系MCF10AT、导管内癌细胞系MCF10DC IS.com、浸润癌细胞系MCF10CA1 a、MCF10CA1d、MCF10CA1h及经典乳腺癌细胞系MCF-7和正常乳腺组织中APC基因启动子1A甲基化状态,然后用逆转录聚合酶链反应(RT-PCR)和实时PCR技术检测上述样品的mRNA表达水平。结果在MCF10模型的增生细胞系、癌前细胞系、导管内癌细胞系、浸润癌细胞系中,APC基因启动子1A处于低甲基化状态;与正常乳腺组织相比,各细胞系APC基因mRNA表达无明显减少,MCF10AT、MCF10CA1d、MCF10CA1h、MCF10DC IS.com的mRNA表达分别减少0.27、0.96、1.78、2.70、2.03倍,MCF10A和MCF-7分别增加0.02和0.33倍)。结论MCF10模型中乳腺癌的发生发展过程与APC基因启动子区异常甲基化无关。 | 杨举伦 David Klinkebiel Michael J Boland Lin Tang Judith K Christman | 2006 | 中华病理学杂志2006，35，1： | 7 |
| 15 | Molecular mechanism and functional consequences of lansoprazole-mediated heme oxygenase-1 induction显示文摘AIM:To investigate the molecular mechanism and functional consequences of heme oxygenase-1(HO-1) activation by lansoprazole in endothelial cells and macrophages. METHODS:Expression of HO-1 mRNA was analyzed by Northern blotting.Western blotting was used to determine the HO-1 and ferritin protein levels. NADPH-dependent reactive oxygen species(ROS) formation was measured with lucigenin-enhanced chemiluminescence.HO-1 promoter activity in mouse fibroblasts,stably transfected with a 15-kb HO-1 gene that drives expression of the reporter gene luciferase, was assessed using in vivo bioluminescence imaging. RESULTS:Lansoprazole increased HO-1 mRNA levels in endothelial cells and HO-1 protein levelsin macrophages.In addition,lansoprazole-induced ferritin protein levels in both cell systems.Moreover, induction of the antioxidant proteins HO-1 and ferritin by lansoprazole was followed by a decrease in NADPH- mediated ROS formation.The radical scavenging properties of lansoprazole were diminished in the presence of the HO inhibitor,chromium mesoporphyrin IX.Induction of HO-1 gene expression by lansoprazole was not related to oxidative stress or to the activation of the mitogen-activated protein kinase pathway. However,the phosphatidylinositol 3-kinase inhibitor LY294002 showed a concentration-dependent inhibition of HO-1 mRNA and promoter activity. CONCLUSION:Activation of HO-1 and ferritin may account for the gastric protection of lansoprazole and is dependent on a pathway blocked by LY294002. | Stephanie Schulz-Geske Kati Erdmann Ronald J Wong David K Stevenson Henning Schrder Nina Grosser | 2009 | World Journal of Gastroenterology2009，15，35： | 7 |
| 16 | 小柴胡汤对体外培养人肝癌细胞株HepG2增殖的影响显示文摘目的探讨小柴胡汤45%乙醇提取物对体外培养人肝癌细胞株HepG2增殖的影响及其可能的机理。方法采用ATP-Lite法测定不同浓度小柴胡汤对体外培养的HepG2增殖的作用,同时利用氧自由基清除能(ORAC)法测定样品的抗氧化活性;以LPS刺激小鼠巨噬细胞RAW264.7产生一氧化氮(NO),Griess法测定NO的终产物亚硝酸盐的含量,观察样品对NO生成的影响。结果小柴胡汤在62.5~500mg/L浓度范围内可以显著抑制HepG2增殖,抑制作用呈剂量相关性,计算半数抑制浓度(IC50)为(90.7±23.7)mg/L。小柴胡汤提取物具有一定的抗氧化活性,其抗氧化能力为阳性对照维生素C的1.3倍。小柴胡汤在3.125~50mg/L浓度范围内均可以显著抑制NO的生成(P<0.05,P<0.01)。结论小柴胡汤具有体外抑制人肝癌细胞株HepG2增殖的作用,其抑制作用可能与其抗氧化活性及抑制NO生成有关。 | 廖晖 David J de Vries Linda K Banbury David N Leach | 2010 | 中国中医药信息杂志2010，17，11： | 7 |
| 17 | 乳腺癌发生模型MCF10各阶段细胞系中TIMP3基因启动子区甲基化分析显示文摘目的探讨抑癌基因TIMP3失活与乳腺癌发生和进展的关系。方法用甲基化特异性PCR技术和亚硫酸盐测序技术检测乳腺癌发生模型MCF10的增生细胞系MCF10A、癌前细胞系MCF10AT、导管内癌细胞系MCF10DCIS.com、浸润癌细胞系MCF10CA1a和转移癌细胞系MCF10CA1d、MCF10CA1h中TIMP3启动子区甲基化状态。结果甲基化特异性PCR分析显示,在上述各细胞系中,TIMP3启动子区均呈高度甲基化状态。亚硫酸盐测序显示,在上述各细胞系中,测序区内的68个CG位点几乎全部发生了甲基化,且甲基化累及了绝大部分等位基因。结论TIMP3基因启动子区甲基化在乳腺癌的发生和进展中起重要作用,可能成为早期诊断乳腺癌和判断乳腺癌预后的分子生物学标记。 | 杨举伦 David Klinkebiel Michael J Boland Lin Tang Judith K Christman | 2006 | 临床与实验病理学杂志2006，22，1： | 7 |
| 18 | Selecting suitable solid organ transplant donors: Reducing the risk of donor-transmitted infections显示文摘Selection of the appropriate donor is essential to a successful allograft recipient outcome for solid organ transplantation. Multiple infectious diseases have been transmitted from the donor to the recipient via transplantation. Donor-transmitted infections cause increased morbidity and mortality to the recipient. In recent years, a series of high-profile transmissions of infections have occurred in organ recipients prompt-ing increased attention on the process of improving the selection of an appropriate donor that balances the shortage of needed allografts with an approach that mitigates the risk of donor-transmitted infection to the recipient. Important advances focused on improving donor screening diagnostics, using previously excluded high-risk donors, and individualizing the selection of allografts to recipients based on their prior infection history are serving to increase the donor pool and improve outcomes after transplant. This article serves to review the relevant literature surrounding this topic and to provide a suggested approach to the selection of an appropriate solid organ transplant donor. | Christopher S Kovacs Jr Christine E Koval David van Duin Amanda Guedes de Morais Blanca E Gonzalez Robin K Avery Steven D Mawhorter Kyle D Brizendine Eric D Cober Cyndee Miranda Rabin K Shrestha Lucileia Teixeira Sherif B Mossad | 2014 | World Journal of Transplantation2014，4，2： | 7 |
| 19 | Quantitative analysis of ruminal methanogenic microbial populations in beef cattle divergent in phenotypic residual feed intake(RFI)offered contrasting diets显示文摘Background:Methane(CH_4) emissions in cattle are an undesirable end product of rumen methanogenic fermentative activity as they are associated not only with negative environmental impacts but also with reduced host feed efficiency.The aim of this study was to quantify total and specific rumen microbial methanogenic populations in beef cattle divergently selected for residual feed intake(RFI) while offered(i) a low energy high forage(HF) diet followed by(ii) a high energy low forage(LF) diet.Ruminal fluid was collected from 14 high(H)and 14 low(L) RFI animals across both dietary periods.Quantitative real time PCR(qRT-PCR) analysis was conducted to quantify the abundance of total and specific rumen methanogenic microbes.Spearman correlation analysis was used to investigate the association between the relative abundance of methanogens and animal performance,rumen fermentation variables and diet digestibility.Results:Abundance of methanogens,did not differ between RFI phenotypes.However,relative abundance of total and specific methanogen species was affected(P< 0.05) by diet type,with greater abundance observed while animals were offered the LF compared to the HF diet.Conclusions:These findings suggest that differences in abundance of specific rumen methanogen species may not contribute to variation in CH_4 emissions between efficient and inefficient animals,however dietary manipulation can influence the abundance of total and specific methanogen species. | Ciara A Carberry David A Kenny Alan K Kelly Sinead M Waters | 2014 | Journal of Animal Science and Biotechnology2014，5，4： | 6 |
| 20 | 乳腺癌发生过程中NOEY2基因启动子区甲基化及mRNA表达显示文摘目的探讨乳腺癌发生过程中抑癌基因NOEY2启动子区甲基化状态及其对mRNA表达的影响。方法应用甲基化特异性PCR及双亚硫酸钠基因测序技术检测MCF10模型中乳腺增生细胞系MCF10A、癌前细胞系MCF10AT、导管内癌细胞系MCF10DC IS.com、浸润癌细胞系MCF10CA1 a、MCF10CA1d、MCF10CA1h及正常乳腺组织中NOEY2基因启动子区CpG岛I甲基化状态,然后用RT-PCR和实时PCR技术检测上述样品的mRNA表达水平。结果MCF10模型的增生细胞系、癌前细胞系、导管内癌细胞系、浸润癌细胞系均发生该基因启动子区CpG岛I高度甲基化;与正常乳腺组织相比,上述细胞系mRNA表达显著减少。结论NOEY2基因启动子区高度甲基化及相应的mRNA表达减少是乳腺癌发生过程中的早期事件,与乳腺癌发生有关,可能成为早期诊断乳腺癌的潜在分子生物学标记。 | 杨举伦 David Klinkebiel Michael J Boland Lin Tang Judith K Christman | 2005 | 临床与实验病理学杂志2005，21，5： | 6 |
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