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1Expression of IGF-Ⅱ,p53,p21 and HBxAg in precancerous events of hepatocarcinogenesis induced by AFBI and/or HBV in tree shrews显示文摘INTRODUCTIONIn order to study the relationship between oncogeneexpression and HCC generation,we observed theprecancerous hepatic GGT loci,IGF-Ⅱ,p53 andp21 expression during hepatocarcinogenesis of treeshrew induced by hepatitis B virus (HBV) and/oraflatoxin B1 (AFB1).Qin LL Su JJ Li Y Yang C Ban KC Yian RQ 2000World Journal of Gastroenterology2000,6,1:37
2医学领域一次研究和二次研究的方法学质量(偏倚风险)评价工具显示文摘方法学质量(偏倚风险)评估是医学研究开始前的重要步骤。因此,准确判断研究类型是前提,选择合适的评价工具也很重要。本综述介绍了用于随机对照试验(包括个体和整群)、动物实验、非随机干预性研究(包括随访研究、有对照组的前后对照研究、前后对照研究、非对照纵向研究、间断时间序列研究)、队列研究、病例-对照研究、横断面研究(包括分析和描述性研究)、观察性病例系列和病例报告、比较效果研究、诊断性研究、卫生经济学评价、预测研究(包括预测变量研究、预测模型影响研究、预后预测模型研究)、质性研究、结果测量工具(包括患者-报告的结果测量发展、内容真实性、结构真实性、内部一致性、跨文化真实性/测量不变性、信度、测量误差、校标真实性、结构真实性假设检验、反应度)、系统评价与Meta分析,以及临床实践指南的方法学质量评价工具。通过本综述,读者可以区分医学研究的类型并选择适当的工具。全面掌握相关知识并多加练习是正确评估方法学质量的基本要求。李柄辉 訾豪 李路遥 王朝阳 任学群 郭毅(译) Ma LL Wang YY Yang ZH 2021医学新知2021,31,1:37
3产ESBL大肠埃希菌和肺炎克雷伯菌导致的社区获得性血流感染在中国广泛流行显示文摘产ESBL大肠埃希菌(ESBL-EC)和肺炎克雷伯菌(ESBL-KP)导致的社区获得血流感染(COBSI)近年来在全球范围内均有增多。本研究旨在分析ESBL-EC和ESBL-KP导致COBSI的流行和危险因素。Quan JJ Zhao DD Liu LL 郝敏 林东昉 2017中国感染与化疗杂志2017,17,3:29
4生物玻璃的研究与发展显示文摘生物玻璃的研究已达二十多年,现已成为材料学、生物化学以及分子生物学的交叉学科.由于生物玻璃具有人体硬或软生命组织有机联结的特点,在骨科、牙科、中耳等方面,对人体的伤害部位可进行修护治疗以至康健,其前景可观.生物玻璃主要由Si、Na、Ca以及P的氧化物组成.被发现具有生物活性的玻璃已有一系列组成,并且对这些系列玻璃已积累了大量的模拟人体溶液实验数据.常用的模拟人体溶液有两种:其一是Tris缓冲液;其二是离子浓度与人体液体中含量相近的模拟人体溶液.理论研究发现,当生物玻璃浸在类人体溶液中时,其表面将发生五步系列反应以及在表面建立起双电层和负的Zeta电势,从而诱导含碳的羟磷灰石在生物玻璃表面的沉积和结晶,而羟磷灰石被公认在与硬或软体组织连接中起关键作用.除溶液实验外,生物玻璃在动物移植实验中实际地发现了与硬或软组织的有机联结.基于这些研究成果,已有生物玻璃产品出现在市场上.但是,生物玻璃在世界广泛的应用,给人类医疗健康带来又一突破性进展,将取决科学研究对无机材料怎样与有机体相联结的进一步了解,以及更为广泛的积累动物和人体的实验数据.钟吉品 Hench,LL 1995无机材料学报1995,10,2:28
5评估调质时间和温度对猪颗粒饲料淀粉糊化度和维生素沉积的影响显示文摘本论文研究了饲料加工的两个关键参数(调质温度和时间)对育肥猪颗粒饲料淀粉糊化度和维生素沉积的影响。日粮配方为含30%干酒糟及其可溶物的玉米-豆粕型基础日粮。整个试验中配方保持不变。本试验采用2×3双因子设计,调质温度分别为77℃和88℃,调质时间分别15秒、30秒和60秒。此外,本试验还设置一个对照组,对照组饲料不采用调质制粒工艺,而是采用粉料饲喂。因此,本试验共有7个处理组。采集调质后制粒前(热干粉)、制粒后冷却前(热制粒)、以及制粒冷却后(冷制粒)的样品,并分析这三种样品的总淀粉率。Lewis LL Stark CR Fahrenholz AC Bergstrom JR Jones CK 2015广东饲料2015,24,5:18
6Effect of retinoic acid on the changes of nuclear matrix-intermediate filament system in gastric carcinoma cells显示文摘AIM To explore the relationship between the configuration changes of the nuclear matrix-intermediate filament system in cancer cell induced by retinoic acid and the malignantphenotypic reversion of cancer cells.METHODS The human gastric adenocarcinomacell line MGc80-3 cells were induced with 10-6mol/ L retinoic acid and subouItured at cover slipstrip and gold grids. The cells were treated byselective extraction methOd and prepared for whole mount electron microscopy observation.The samples were examined respectively withscanning and transmission electron microscope.RESULTS The nuclear matrix filaments andintermediate filaments in MGC80-3 cells wererelatively few and scattered, not welldistributed and arranged irregularly. The nuclear lamina was ununiformly thick and compact,connected to the nuclear matrix filaments and intermediate filaments relaxedly. However, thetwo kinds of filaments were abundant and welldistributed, different in slender and thick form and interweaved into a regular network in the cells induced by 10-6 mol/ L RA. The nuclear matrix filaments and intermediate filaments were connected closely by the thin and compact fiber-Iike lamina, and interlaced into a regularnetwork throughout the whole cell region.CONCLUSION The NM-IF system in MGc80-3cells had undergone a restorational changesimilar to those of normaI cells after RAinducement. This alternation is an importantmorpholOgical and functional expression to themalignant phenotypic reversion of cancer cells.Ll Qi-Fu(Laboratory of Cell Biology, XiamenUniversity, Xiamen 361O05, Fuian Province, China) 1999World Journal of Gastroenterology1999,5,5:17
7Intrahepatic biliary cystic neoplasms:Surgical results of 9 patients and literature review显示文摘AIM: To investigate the eligible management of the cystic neplasms of the liver. METHODS: The charts of 9 patients who underwent surgery for intrahepatic biliary cystic liver neoplasms between 2003 and 2008 were reviewed retrospectively. Informed consent was obtained from the patients and approval was obtained from the designated review board of the institution. RESULTS: All patients were female with a median (range) age of 49 (27-60 years). The most frequent symptom was abdominal pain in 6 of the patients. Four patients had undergone previous laparotomy (with other diagnoses) which resulted in incomplete surgery or recurrences. Liver resection (n = 6) or enucleation (n = 3) was performed. The final diagnosis was intrahepaticbiliary cystadenoma in 8 patients and cystadenocarcinoma in 1 patient. All symptoms resolved after surgery. There has been no recurrence during a median (range) 31 (7-72) mo of follow up. CONCLUSION: In spite of the improvement in imaging modalities and increasing recognition of biliary cystadenoma and cystadenocarcinoma, accurate preoperative diagnosis may be difficult. Complete surgical removal (liver resection or enucleation) of these lesions yields satisfying long-term results.Ali Emre Kür■at Rahmi Serin Ilgin zden Yaman Tekant Orhan Bilge Ayd■n Alper Mine Güllüoglu Koray Güven 2011World Journal of Gastroenterology2011,17,3:15
8Preliminary study on the production of transgenic mice harboring hepatitis B virus X gene显示文摘INTRODUCTIONDespiteoverwhelmingepidemiologicalevidencelinkingpersistentHepatitisBVirus(HBV)infectionandthedevelopmentofhepato...ZHU Huan Zhang 1, CHENG Guo Xiang 2, CHEN Jian Qu 2, KUANG Shu Yuan 3, CHENG Yong 2, ZHANG Xin Li 1, Ll Hou Da 2, XU Shao Fu 2, SHI Jing Quan 1, QIAN Geng Sun 3 and GU Jian Ren 3 1998World Journal of Gastroenterology1998,4,6:14
9Effects of resveratrol in experimental and clinical non-alcoholic fatty liver disease显示文摘The prevalence of obesity and related conditions like non-alcoholic fatty liver disease(NAFLD) is increasing worldwide and therapeutic options are limited.Alternative treatment options are therefore intensively sought after.An interesting candidate is the natural polyphenol resveratrol(RSV) that activates adenosinmonophosphate-activated protein kinase(AMPK) and silent information regulation-2 homolog 1(SIRT1).In addition,RSV has known anti-oxidant and anti-inflammatory effects.Here,we review the current evidence for RSVmediated effects on NAFLD and address the different aspects of NAFLD and non-alcoholic steatohepatitis(NASH) pathogenesis with respect to free fatty acid(FFA) flux from adipose tissue,hepatic de novo lipogenesis,inadequate FFA β-oxidation and additional intra- and extrahepatic inflammatory and oxidant hits.We review the in vivo evidence from animal studies and clinical trials.The abundance of animal studies reports a decrease in hepatic triglyceride accumulation,liver weight and a general improvement in histological fatty liver changes,along with a reduction in circulating insulin,glucose and lipid levels.Some studies document AMPK or SIRT1 activation,and modulation of relevant markers of hepatic lipogenesis,inflammation and oxidation status.However,AMPK/SIRT1-independent actions are also likely.Clinical trials are scarce and have primarily been performed with a focus on overweight/obese participants without a focus on NAFLD/NASH and histological liver changes.Future clinical studies with appropriate design are needed to clarify the true impact of RSV treatment in NAFLD/NASH patients.Sara Heebll Karen Louise Thomsen Steen B Pedersen Hendrik Vilstrup Jacob George Henning Grnbk 2014World Journal of Hepatology2014,6,4:11
10Associations of sense of coherence with psychological distress and quality of life in inflammatory bowel disease显示文摘AIM:To investigate the relationship between sense of coherence,psychological distress and health related quality of life in inflammatory bowel disease(IBD).METHODS:This cross-sectional study enrolled a consecutive sample of 147 IBD(aged 45.1 ± 14.1 years; 57.1% female) patients recruited from a tertiary gastroenterology service.Sixty-four participants met diagnostic criteria for Crohn's disease,while eightythree patients had ulcerative colitis.Socio-demographic data(education,age,race,gender,gross monthly income and marital status),disease-related variables(illness activity,relapse rate in past 2 years,history of surgery and time since diagnosis),sense of coherence(Antonovsky's SOC scale),psychological distress symptoms(Hospital Anxiety and Depression Scale) and health-related quality of life(HRQo L; WHOQOLBref) were assessed.Hierarchical multiple regression analyses were performed to identify factors that are independently associated with psychological distress and HRQo L in patients with IBD and to provide indications for possible moderating or mediating effects.In addition,formal moderation and mediation analyses(Sobel tests) were performed to confirm potential moderators/mediators of the relationship between SOC,psychological distress symptoms and HRQoL.RESULTS:Lower SOC scores(std beta=-0.504; P < 0.001),female gender(std beta = 0.176; P = 0.021) and White race(std beta = 0.164; P = 0.033) were independently associated with higher levels of depressive symptoms,while lower levels of SOC(std beta =-0.438; P < 0.001) and higher relapse rate(std beta = 0.161; P = 0.033) were independently associated with more severe anxiety symptoms.A significant interaction between time since diagnosis and SOC was found with regard to the severity of depressive or anxiety symptoms,as the interaction term(time since diagnosis X SOC) had beta coefficients of-0.191(P = 0.009) and-0.172(P = 0.026),respectively.Lower levels of anxiety symptoms(std beta =-0.369; P < 0.001),higher levels of SOC(std beta = 0.231; P = 0.016) and non-White race(std beta =-0.229; P = 0.006),i.e.,mixed-race,which represented the reference category,were independently associated with higher levels of overall HRQoL.Anxiety symptoms were the most potent independent correlate of most aspects of HRQoL.In addition,anxiety mediated the association between SOC and satisfaction with health,as well as its relationship with physical,mental,and social relations HRQo L.Depressive symptoms also mediated the association between SOC and mental HRQoL.CONCLUSION:Our data indicated that SOC is an important construct,as it influences psychological distress and has significant albeit indirect effects on several HRQoL domains in IBD.Thiago H Freitas Elias Andreoulakis Gilberto S Alves Hesley LL Miranda Lúcia LBC Braga Thomas Hyphantis André F Carvalho 2015World Journal of Gastroenterology2015,21,21:10
11Functional roles and clinical values of insulin-like growth factor-binding protein-5 in different types of cancers显示文摘Insulin-like growth factor-bindin g proteins (IGFBPs) are critical regulators of the mitogenic activity of insulin-like growth factors (IGFs). IGFBP5, one of these IGFBPs, has special structural features, including a nuclear transport domain, heparin-binding motif, and IGF/extracellular matrix/acid-labile subunit-binding sites. Furthermore, IGFBP5 has several functional effects on carcinogenesis and even normal cell processes, such as cell growth, death, motility, and tissue remodeling. These biological effects are sometimes related with IGF (IGF-dependent effects) and sometimes not (IGF-independent effects). The functional role of IGFBP5 is most likely determined in a cell-type and tissue-type specific manner but also depends on cell context, especially in terms of the diversity of interacting proteins and the potential for nuclear localization. Clinical findings show that IGFBP5 has the potential to be a useful clinical biomarker for predicting response to therapy and clinical outcome of cancer patients. In this review, we summarize the functional diversity and clinical importance of IGFBP5 in different types of cancers.Gökçe Güllü Sevgi Karabulut Mustafa Akkiprik 2012Chinese Journal of Cancer2012,31,6:8
12Partial sequencing of 5' non-coding region of 7 HGV strains isolated from different areas of China显示文摘WANG Xing-Tai ZHUANG Hui SONG Hai-Bo Ll He-Min ZHANG Hua-Yuan and YU Yang(National Institute for the Control of bormceutical and BiologicalPriducts, Beijing 100050, China)(Department of Microbiology, Beijing Medical University, Beijing100083, China)(L 1999World Journal of Gastroenterology1999,5,5:7
13Efficacies of β-L-D4A against Hepatitis B virus in 2.2.15 cells显示文摘AIM:To investigate the antiviral effect of beta-L-enantiomer of 2',3'-didehydro-2',3'-dideoxyadenosine (β-L-D4A) on 2.2.15 cells transfected with the hepatitis B virus (HBV) genome. METHODS:Lamivudine (3TC) as a positive control. Then, HBV DNA in treated 2.2.15 cells and the Hepatitis B surface antigen (HBsAg) in the culture supernatants were detected to determine the inhibitory effect of β-L-D4A. At the same time, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) was used to detect the survival ratio of 2.2.15 cells. RESULTS:β-L-D4A has a dose-dependent inhibitory effect on HBV DNA replication;this effect was apparent when the concentration was above 1 mol/L. When β-L-D4A was at the highest concentration, 100 mol/L, the HBsAg inhibition ratio was above 50%. The Therapeutic index (TI) of β-L-D4A was above 2.1. CONCLUSION:β-L-D4A has a dose-dependent inhibitory effect on the replication of HBV DNA and the secretion of HBsAg at low toxicity.Lin-Lin Gao, Xiao-Yan Wang, Ju-Sheng Lin, Ying-Hui Zhang, Yan Li, Institute of Liver Diseases, Tongji Hospital, Tongii Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China Author contributions:Gao LL and Wang XY contributed equally to this work Gao LL, Wang XY, Lin JS, Zhang YH, Li Y designed the research Gao LL and Wang XY performed the research Gao LL wrote the paper 2008World Journal of Gastroenterology2008,14,8:7
14Soil fungistasis and its relations to soil microbial composition and diversity:A case study of a series of soils with different fungistasis显示文摘Fungistasis is one of the important approaches to control soil-borne plant pathogens.Some hypotheses about the mechanisms for soil fungistasis had been established,which mainly focused on the soil bacterial community composition,structure,diversity as well as function.In this study,the bacterial community composition and diversity of a series of soils treated by autoclaving,which coming from the same original soil sample and showing gradient fungistasis to the target soil-borne pathogen fungi Fusarium gr...Wu Minna Zhang Huiwen Ll Xinyu Zhang Yan Su Zhencheng Zhang Chenggang 2008Journal of Environmental Sciences2008,20,7:7
15PD-L1 and PD-L2 expression correlated genes in non-small-cell lung cancer显示文摘Background:Programmed cell death ligand-1(PD-L1)and ligand-2(PD-L2)interaction with programmed cell death protein-1(PD-1)represent an immune-inhibiting checkpoint mediating immune evasion and is,accordingly,an important target for blockade-based immunotherapy in cancer.In non-small-cell lung cancer(NSCLC),improved understanding of PD-1 checkpoint blockade-responsive biology and identification of biomarkers for prediction of a clinical response to immunotherapy is warranted.Thus,in the present study,we systematically described PD-L1 and PD-L2 expression correlated genes in NSCLC.Methods:We performed comparative retrospective analyses to identify PD-L1 and PD-L2 mRNA expression corre-lated genes in NSCLC.For this,we examined available datasets from the cancer cell line encyclopedia(CCLE)project lung non-small-cell(Lung_NSC)and the cancer genome atlas(TCGA)projects lung adenocarcinoma(LUAD)and squamous cell carcinoma(LUSC).Results:Analysis of the CCLE dataset Lung_NSC identified expression correlation between PD-L1 and PD-L2.Moreo-ver,we identified expression correlation between 489 genes and PD-L1,191 genes and PD-L2,and 111 genes for both.PD-L1 and PD-L2 also expression correlated in TCGA datasets LUAD and LUSC.In LUAD,we identified expression corre-lation between 257 genes and PD-L1,914 genes and PD-L2,and 211 genes for both.In LUSC,we identified expression correlation between 26 genes and PD-L1,326 genes and PD-L2,and 13 genes for both.Only a few genes expression correlated with PD-L1 and PD-L2 across the CCLE and TCGA datasets.Expression of Interferon signaling-involved genes converged in particular with the expression correlated genes for PD-L1 in Lung_NSC,for PD-L2 in LUSC,and for both PD-L1 and PD-L2 in LUAD.In LUSC,PD-L1,and to a lesser extent PD-L2,expression correlated with chromosome 9p24 localized genes,indicating a chromosome 9p24 topologically associated domain as an important driver of in particu-lar LUSC PD-L1 expression.Expression correlation analyses of the PD-L1 and PD-L2 receptors programmed cell death protein-1(PD-1),Cluster of differentiation 80(CD80),and Repulsive guidance molecule B(RGMB)showed that PD-1 and CD80 expression correlated with both PD-L1 and PD-L2 in LUAD.CD80 expression correlated with PD-L2 in LUSC.Conclusions:We present gene signatures associated with PD-L1 and PD-L2 mRNA expression in NSCLC which could possess importance in relation to understand PD-1 checkpoint blockade-responsive biology and development of gene signature based biomarkers for predicting clinical responses to immunotherapy.Trine Vilsbøll Larsen Dianna Hussmann Anders Lade Nielsen 2019Cancer Communications2019,39,1:7
16WONCA研究论文摘要汇编——孕前服用低剂量阿司匹林的妊娠结果:EAGeR随机试验结果显示文摘背景孕前服用低剂量阿司匹林或许对妊娠结果起正性作用,但临床尚未对此做出充分的评价。本研究对低剂量阿司匹林能否提高有1~2次流产史妇女的活产率进行了调查。方法采用多中心、随机区组、双盲、安慰剂对照研究,将美国4个医疗中心18~40岁有妊娠意向的妇女纳入研究。入选标准:最初分组,受试者仅限于近1年内曾有过妊娠﹤20周流产1次的妇女;扩展分组,扩展至有1~2次流产史的妇女;对孕周及流产时间无限制。Schisterman EF Silver RM Lesher LL 周淑新 2014中国全科医学2014,17,20:6
17急性淋巴细胞白血病(上)显示文摘Pui CH Robison LL Look AT 朱琳 2010中国小儿血液与肿瘤杂志2010,15,1:6
18Two New Oleanene-Type Triterpenoid Saponins from Pueraria peduncularis显示文摘From the radix of Pueraria peduncularis Grab., two new oleanene-type triterpenoid saponins named pedunsaponins B (2) and C (3) were isolated. Their structures were determined as 3-O-(6-O-methyl)-β-D-glucuronopyranosyl -3β.15a-diol-12-oleanene-16-one (2) and 3-O-β- Dglucopyranosyl-(1 -3)-β-D-glucuronopyranosyl-3β. 15a-diol- 12-oleancne- 16-one (3) on the basis of spectroscopic evidence and chemical reactions.Na Ll~1 Zhi Da MIN~1 Hou Ming WU~2 (1 Department of Natural Products Chemistry, China Pharmaceutical University, Nanjing 210009 2 State Key.Laboratory of Bio-organic and Natural Products Chemistry. Shanghai Institute of Organic Chemistry. Chinese Academy 2000Chinese Chemical Letters2000,11,4:5
19中年成人平均动脉压的体位改变与动脉硬度的关系:Framingham心脏研究显示文摘Torjesen A, Cooper LL, Rong J, Larson MG, Hamburg NM, Levy D, Benjamin EJ, Vasan RS, Mitchell GF. Relations of arterial stiffness with postural change in mean arterial pressure in middle-aged adults:the Framingham heart study. Hyperten- sion,2017,69(4) :685-690.站立位血压稳定调节受损可导致不良结果,包括跌倒、晕厥和定向障碍。平均动脉压(meanarterialpressure,MAP)通常在站立位时增加,然而,站立位MAP增加不足或减少可能导致脑灌注减少。已有研究报道,在动脉硬度增加的老年人中存在体位性低血压,年轻至中年人MAP的体位性改变与动脉硬度的相关性尚未阐明。该研究分析了Framingham心脏研究第3代队列中的受试者3205人(女性1693人,占53%)的直立性血压反应和全面血液动力学数据。Torjesen A Cooper LL Rong J Larson MG Hamburg NM Levy D Benjamin EJ Vasan RS Mitchell GF 刘莉 叶鹏 2017中华高血压杂志2017,25,3:5
20Cytokines in the BALB/c mouse testis in various conditions显示文摘To investigate whether testosterone, estrogens, vasectomy, experimental cryptorchidism, varicocele or aging would induce changes in the cytokine environment of the mouse testis. Methods: In adult male BALB/c mice,testosterone implants, estradiol benzoate, vasectomy, unilateral cryptorchidism, unilateral varicocele were adminis tered/performed. The mice were followed up for different periods of time and were then sacrificed with testes incised for examination. The control mice received the vehicle or sham-operation. Results: IL-10 was present in Leydig cells of nearly every testis and IL-10 + macrophages in 39% of testes. IL-6 was found in the testes of intact adult mice, mice treated with testosterone for 70 days, cryptorchid testes and sham-operated testes. Conclusion: Results suggest that IL-10 might be involved in the generation of the immunologically privileged microenvironment in the testis.E.Verjnkorva M.Martikainen P.Pllnen 2001Asian Journal of Andrology2001,3,1:4
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