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1Fecal microbiota transplantation as novel therapy in gastroenterology:A systematic review显示文摘AIM:To study the clinical efficacy and safety of Fecal microbiota transplantation(FMT).We systematically reviewed FMT used as clinical therapy.METHODS:We searched MEDLINE,EMBASE,the Cochrane Library and Conference proceedings from inception to July,2013.Treatment effect of FMT was calculated as the percentage of patients who achieved clinical improvement per patient category,on an intention-to-treat basis.RESULTS:We included 45 studies;34 on Clostridium difficile-infection(CDI),7 on inflammatory bowel disease,1 on metabolic syndrome,1 on constipation,1 on pouchitis and 1 on irritable bowel syndrome(IBS).In CDI 90% resolution of diarrhea in 33 case series(n = 867) was reported,and 94% resolution of diarrhea after repeated FMT in a randomized controlled trial(RCT)(n = 16).In ulcerative colitis(UC) remission rates of 0% to 68% were found(n = 106).In Crohn's disease(CD)(n = 6),no benefit was observed.In IBS,70% improvement of symptoms was found(n = 13).100% Reversal of symptoms was observed in constipation(n = 3).In pouchitis,none of the patients(n = 8) achieved remission.One RCT showed significant improvement of insulin sensitivity in metabolic syndrome(n = 10).Serious adverse events were rare.CONCLUSION:FMT is highly effective in CDI,and holds promise in UC.As for CD,chronic constipation,pouchitis and IBS data are too limited to draw conclusions.FMT increases insulin sensitivity in metabolic syndrome.Noortje G Rossen John K Mac Donald Elisabeth M de Vries Geert R D'Haens Willem M de Vos Erwin G Zoetendal Cyriel Y Ponsioen 2015World Journal of Gastroenterology2015,21,17:41
2草莓的化学成分研究显示文摘目的 :对草莓的化学成分进行研究。方法 :色谱法分离化合物 ,波谱和化学法进行结构鉴定。结果 :从果实中分离得到 3个化合物 ,鉴定为环阿廷醇 ,14 甲基 豆甾 7,2 4(2 8)二烯 3β 醇和 β 谷甾醇。 结论 :3个化合物均为首次从该植物中获得。阮金兰 陈静波 赵晓亚 孙南君 John M Cassady Gary D Stoner 2001中国中药杂志2001,26,9:16
3Role of nitric oxide in hepatic ischemia-reperfusion injury显示文摘Hepatic ischemia-reperfusion injury (IRI) occurs upon restoration of hepatic blood flow after a period of ischemia. Decreased endogenous nitric oxide (NO) production resulting in capillary luminal narrowing is central in the pathogenesis of IRI. Exogenous NO has emerged as a potential therapy for IRI based on its role in decreasing oxidative stress,cytokine release,leukocyte endothelial-adhesion and hepatic apoptosis. This review will highlight the influence of endogenous NO on hepatic IRI,role of inhaled NO in ameliorating IRI,modes of delivery,donor drugs and potential side effects of exogenous NO.Arunotai Siriussawakul Ahmed Zaky John D Lang 2010World Journal of Gastroenterology2010,16,48:14
4Regression of cirrhosis during treatment with tenofovir disoproxil fumarate for chronic hepatitis B: a 5-year open-label follow-up study显示文摘Patrick Marcellin Edward Gane Maria Buti Nezam Afdhal William Sievert Ira M Jacobson Mary Kay Washington George Germanidis John F Flaherty Raul Aguilar Schall Jeffrey D Bornstein Kathryn M Kitrinos G Mani Subramanian John G McHutchison E Jenny Heathcote 2012The Lancet2012,,:14
5肌萎缩性侧索硬化蛋白激活小胶质细胞NLRP3炎性小体显示文摘小胶质细胞NLRP3炎性小体激活正在成为神经退行性变过程中神经炎症的关键因素。诸如β-淀粉样蛋白和α-突触核蛋白之类的致病性蛋白质聚集体触发小胶质NLRP3激活,从而导致半胱天冬酶-1激活和IL-1β的分泌。在小鼠肌萎缩性侧索硬化症(ALS)的SOD1G93A模型中,半胱天冬酶-1和IL-1β均促进疾病进展,提示小胶质NLRP3在该进程中发挥作用。然而先前的研究表明,SOD1G93A小鼠小胶质细胞不表达NLRP3,SOD1G93A蛋白在小胶质细胞中产生独立于NLRP3的IL-1β。本研究论证了使用Nlrp3-GFP基因敲入小鼠,在SOD1G93A小鼠中小胶质细胞表达NLRP3。本研究显示聚集和可溶性SOD1G93A均可激活小鼠原代小胶质细胞中的炎性小体,导致半胱天冬酶-1和IL-1β裂解,ASC斑点形成以及呈剂量和时间依赖性的IL-1β分泌。重要的是,SOD1G93A无法从缺乏Nlrp3的小胶质细胞或者用特异性NLRP3抑制剂MCC950预处理的小胶质细胞中诱导IL-1β分泌,从而证实NLRP3是介导SOD1诱导的小胶质细胞IL-1β分泌的关键炎症小体复合物。在TDP-43Q331K ALS小鼠模型中也观察到小胶质NLRP3上调,TDP-43野生型和突变蛋白亦可以NLRP3依赖性的方式激活小胶质炎性小体。从机制上讲,本研究确定了活性氧簇和ATP的生成是SOD1G93A介导的NLRP3激活所需的关键事件。总之,本研究的数据表明ALS小胶质细胞表达NLRP3,而病理ALS蛋白激活小胶质NLRP3炎性小体。因此,NLRP3抑制可能是阻止小胶质细胞神经炎症和ALS疾病进展的潜在治疗方法。Vandana Deora John D Lee Eduardo AAlbornoz Luke McAlary Cyril J Jagaraj Avril A B Robertson Julie D Atkin Matthew A Cooper Kate Schroder Justin J Yerbury Richard Gordon Trent MWoodruff 杜一星(编译) 2020神经损伤与功能重建2020,15,9:13
6Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques显示文摘There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D.Accordingly there is a pressure on developers of leading commercial codes,such as LS-DYNA.AUTODYN and IMPETUS Afea.to implement the reliable fracture models and the efficient solution techniques.The applicability of the Johnson—Cook strength and fracture model is evaluated by comparing the fracture behaviour of an expanding steel casing of a warhead with experiments.The numerical codes and different numerical solution techniques,such as Eulerian,Lagrangian.Smooth particle hydrodynamics(SPH).and the corpuscular models recently implemented in IMPETUS Afea are compared.For the same solution techniques and material models we find that the codes give similar results.The SPH technique and the corpuscular technique are superior to the Eulerian technique and the Lagrangian technique(with erosion) when it is applied to materials that have fluid like behaviour such as the explosive and the tracer.The Eulerian technique gives much larger calculation time and both the Lagrangian and Eulerian techniques seem to give less agreement with our measurements.To more correctly simulate the fracture behaviours of the expanding steel casing,we applied that ductility decreases with strain rate.The phenomena may be explained by the realization of adiabatic shear bands.An implemented node splitting algorithm in IMPETUS Afea seems very promising.John F.MOXNES Anne K.PRYTZ Фyvind FRФYLAND Siri KLOKKEHAUG Stian SKRIUDALEN Eva FRIIS Jan A.TELAND Cato DФRUM Gard ФDEGARDSTUEN 2014Defence Technology(防务技术)2014,10,2:12
7New yellow Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor for warm-white light-emitting diodes through single-emitting-center conversion显示文摘Phosphor-converted white light-emitting diodes for indoor illumination need to be warm-white(i.e.,correlated color temperature,4000 K)with good color rendition(i.e.,color rendering index.80).However,no single-phosphor,single-emitting-center-converted white light-emitting diodes can simultaneously satisfy the color temperature and rendition requirements due to the lack of sufficient red spectral component in the phosphors’emission spectrum.Here,we report a new yellow Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor that has a new orthorhombic lattice structure and exhibits a broad yellow photoluminescence band with sufficient red spectral component.Warm-white emissions with correlated color temperature,4000 K and color rendering index.80 were readily achieved when combining the Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor with a blue light-emitting diode(440–470 nm).This study demonstrates that warm-white light-emitting diodes with high color rendition(i.e.,color rendering index.80)can be achieved based on single-phosphor,single-emitting-center conversion.Xufan Li John D Budai Feng Liu Jane Y Howe Jiahua Zhang Xiao-Jun Wang Zhanjun Gu Chengjun Sun Richard S Meltzer Zhengwei Pan 2013Light(Science & Applications)2013,2,1:11
8Redox therapeutics in hepatic ischemia reperfusion injury显示文摘Ischemia-reperfusion plays a major role in the injury experienced by the liver during transplantation. Much work has been done recently investigating the role of redox species in hepatic ischemia-reperfusion. As animal models are better characterized and developed, and more insights are gained into the pathophysiology of hepatic ischemia reperfusion injury in humans the questions into exactly how oxidants participate in this injury are becoming more refined. These questions include effects of cellular location, timing of injury, and ability of therapeutics to access this site are increasing our appreciation of the complexity of ischemia reperfusion and improving attempts to ameliorate its effects. In this review, we aim to discuss the various methods to alter redox chemistry during ischemia reperfusion injury and future prospects for preventing organ injury during hepatic ischemia reperfusion.Rakesh P Patel John D Lang Alvin B Smith Jack H Crawford 2014World Journal of Hepatology2014,6,1:9
9地理信息系统技术在伤寒发热监测中应用显示文摘目的运用地理信息系统(GIS)技术,了解各居民点发热流行率和评价以医疗机构为哨点的伤寒发热监测系统的敏感性。方法收集医学人口普查数据、疾病监测系统信息数据、现场采集居民居住点全球卫星定位数据等资料,建立GIS系统和以人口为基数的发热监测系统;对所有发热就诊病人进行身份和居住地址确认,并制作各居民点年发热就诊率GIS分布图。结果共采集3776个居民居住的全球定位系统(GPS)定位点,人群发热就诊率为1.11‰,发热就诊人次占总门诊人次的16.3%,监测区内的发热就诊病人占所有发热就诊病人的83.5%。在3种类型的医疗机构中,门诊量以个体门诊类最多,但其发热就诊人次占总门诊人次的比率最低(12.6%)。监测区内发热1d或以上的病人地址和身份(ADDRESS-ID)确认率达到95%。根据居民点年发热就诊率GIS分布图,发热就诊率最高的居民点达到17.81‰,最低为0;发热就诊率高的居民点多集中在城市。结论利用GIS技术可直观准确的了解疾病流行率的分布,可迅速直观的寻找出监测系统中的薄弱环节和推断出可能存在的问题。杨进 董柏青 张杰 廖和壮 梁大斌 吴兴华 司国爱 杨宏徽 Jin Kyung Park R Leon Ochiai Camilo J Acosta Moharmmad Ali John D Clemens 2007中国公共卫生2007,23,9:8
10Establishing proof of concept:Platelet-rich plasma and bone marrow aspirate concentrate may improve cartilage repair following surgical treatment for osteochondral lesions of the talus显示文摘Osteochondral lesions of the talus are common injuries in the athletic patient. They present a challenging clinical problem as cartilage has a poor potential for healing. Current surgical treatments consist of reparative(microfracture) or replacement(autologous osteochondral graft) strategies and demonstrate good clinical outcomes at the short and medium term follow-up. Radiological findings and second-look arthroscopy however, indicate possible poor cartilage repair with evidence of fibrous infill and fissuring of the regenerative tissue following microfracture. Longer-term follow-up echoes these findings as it demonstrates a decline in clinical outcome. The nature of the cartilage repair that occurs for an osteochondral graft to become integrated with the native surround tissue is also of concern. Studies have shown evidence of poor cartilage integration,with chondrocyte death at the periphery of the graft, possibly causing cyst formation due to synovial fluid ingress. Biological adjuncts, in the form of platelet-rich plasma(PRP) and bone marrow aspirate concentrate(BMAC), have been investigated with regard to their potential in improving cartilage repair in both in vitro and in vitro settings. The in vitro literature indicates that these biological adjuncts may increase chondrocyte proliferation as well as synthetic capability, while limiting the catabolic effects of an inflammatory joint environment. These findings have been extrapolated to in vitro animal models, with results showing that both PRP and BMAC improve cartilage repair. The basic science literature therefore establishes the proof of concept that biological adjuncts may improve cartilage repair when used in conjunction with reparative and replacement treatment strategies for osteochondral lesions of the talus.Niall A Smyth Christopher D Murawski Amgad M Haleem Charles P Hannon Ian Savage-Elliott John G Kennedy 2012World Journal of Orthopedics2012,3,7:8
11Vanishing bile duct syndrome in human immunodeficiency virus infected adults:A report of two cases显示文摘Vanishing bile duct syndrome(VBDS) is a group of rare disorders characterized by ductopenia,the progressive destruction and disappearance of intrahepatic bile ducts leading to cholestasis.Described in association with medications,autoimmune disorders,cancer,transplantation,and infections,the specific mechanisms of disease are not known.To date,only 4 cases of VBDS have been reported in human immunodeficiency virus(HIV) infected patients.We report 2 additional cases of HIV-associated VBDS and review the features common to the HIV-associated cases.Presentation includes hyperbilirubinemia,normal liver imaging,and negative viral and autoimmune hepatitis studies.In HIV-infected subjects,VBDS occurred at a range of CD4+ T-cell counts,in some cases following initiation or change in antiretroviral therapy.Lymphoma was associated with two cases;nevirapine,antibiotics,and viral co-infection were suggested as etiologies in the other cases.In HIV-positive patients with progressive cholestasis,early identification of VBDS and referral for transplantation may improve outcomes.Ana Paula Oppenheimer Christopher Koh Mary McLaughlin John C Williamson Thomas D Norton Jennifer Laudadio Theo Heller David E Kleiner Kevin P High Caryn G Morse 2013World Journal of Gastroenterology2013,19,1:8
12The role of the molecular chaperone heat shock protein A2 (HSPA2) in regulating human sperm-egg recognition显示文摘在人的不孕病人的精子在场的最普通的损害之一是精子鸡蛋识别的自发的失败。尽管这个唯一的细胞的相互作用现在能被象 intracytoplasmic 精子注射(ICSI ) 那样的帮助繁殖策略乐意地绕过,最近的大规模流行病学的研究鼓励了这种技术的小心的使用并且为对为有缺点的精子鸡蛋识别负责的机制的进一步的研究加亮需要。这个领域里的以前的工作证实了为卵母细胞相互作用负责的精子领域在动态地在女繁殖的道在 epididymal 成熟和 capacitation 期间被修改以前在精子发生期间被形成。当为这些顺序的 maturational 事件的规定负责的因素无疑是复杂的时,新兴的研究识别了分子的女伴,加热吃惊蛋白质 A2 (HSPA2 ) ,,在人的精子的这些事件的一个关键管理者。HSPA2 是支持合拢,运输,和集会蛋白质建筑群的 70 kDa 热吃惊蛋白质家庭的一个充实睾丸的成员并且断然被相关与在 vitro 授精(IVF ) 成功。而且,从人的精子 proteome 减少了 HSPA2 的表示为跟随 IVF 和 ICSI 的积云矩阵疏开,精子鸡蛋识别和授精导致一个损害能力。在这评论,我们考虑在精子功能支持 HSPA2 的角色的证据并且探索它被在不肥沃的病人的精子弄空的潜在的机制。进管理精子的分子的机制的如此的信息提议小说卓见工作。Brett Nixon Elizabeth G Bromfield Matthew D Dun Kate A Redgrove Eileen A McLaughlin R John Aitken 2015Asian Journal of Andrology2015,17,4:8
13清洁发展机制项目的融资方案显示文摘减少导致温室效应的污染物排放是一个无国界的全球性要求,世界各国都应联合起来,共同解决经济发展中出现的问题。重点介绍了荷兰清洁发展机制和世界银行原型碳基金会介入这个新兴领域的实践经验。Kostantinos D Patlitzianas Argyris G Kagiannas John Psarras 项芬丽 2004能源工程2004,,1:7
14诊断性试验和策略的证据质量和推荐强度的分级显示文摘GRADE系统能对诊断性试验或策略的证据质量和推荐强度进行分级。本文旨在阐释在此过程中如何考虑患者的重要结局,Holger J Schünemann Andrew D Oxman Jan Brozek Paul Glasziou Roman Jaeschke Gunn E Vist John W Williams Jr Regina Kunz Jonathan Craig Victor M Montori Patrick Bossuyt Gordon H Guyatt 李晓 黄程 陈耀龙 李幼平 2009中国循证医学杂志2009,9,5:7
15Transradial versus transfemoral access for anterior circulation mechanical thrombectomy: analysis of 375 consecutive cases显示文摘Objective To compare transradial artery access(TRA)to the gold standard of transfemoral artery access(TFA)in mechanical thrombectomy(MT)for stroke caused by anterior circulation large vessel occlusion.Methods The clinical outcomes,procedural speed,angiographic efficacy and safety of both techniques were analysed in 375 consecutive cases over an 18-month period in a high volume statewide neurointerventional service.Results There was no significant difference in patient characteristics,stroke parameters,imaging techniques or intracranial techniques.The median time elapsed between CT scanning and reperfusion was 96.5 min(IQR 68-123)in the TFA group and 95 min(IQR 68-123)in the TRA group(p=0.456).Of 336 patients who were independent at presentation 58%(124/214)of the TFA group and 67%(82/122)of the TRA group had a modified Rankin score of 0-2 at 90-day follow-up(p=0.093).Cross-over from radial to femoral was 4.6%(4/130)compared with 1.6%cross-over from femoral to radial(4/245),but did not meet the predetermined level of statistical significance(OR2.92,95% CI 0.81 to 10.52,p=0.088) and did not impact median procedural speed.Adequate angiographic reperfusion,first pass reperfusion,embolisation to new territory and symptomatic intracranial haemorrhage were similar in both groups.There was a significant difference in major access site complications requiring an additional procedure.None of the TRA cases had a major access site complication but 6.5%(16/245)of the TFA cases did(p=0.003).Conclusion This study suggests that using TRA for anterior circulation MT is fast,efficacious,safe and not inferior to the gold standard of TFA.Timothy John Phillips Matthew Thomas Crockett Gregory D Selkirk Ruchi Kabra Albert Ho Yuen Chiu Tejinder Singh Constantine Phatouros William McAuliffe 2021Stroke & Vascular Neurology2021,6,2:7
16Inpatient capsule endoscopy leads to frequent incomplete small bowel examinations显示文摘AIM:To examine the predictive factors of capsule endoscopy(CE) completion rate(CECR) including the effect of inpatient and outpatient status.METHODS:We identified 355 consecutive patients who completed CE at Rush University Medical Center between March 2003 and October 2005.Subjects for CE had either nothing by mouth or clear liquids for the afternoon and evening of the day before the procedure.CE exams were reviewed by two physicians who were unaware of the study hypotheses.After retrospective analysis,21 cases were excluded due to capsule malfunction,prior gastric surgery,endoscopic capsule placement or insufficient data.Of the remaining 334 exams [264 out-patient(OP),70 in-patient(IP)],CE indications,findings,location of the patients [IP vs OP and intensive care unit(ICU) vs general medical floor(GMF)] and gastrointestinal transit times were analyzed.Statistical analysis was completed using SPSS version 17(Chicago,IL).Chi-square,t test or fisher exact-tests were used as appropriate.Multivariate logistic regression analysis was used to identify variables associated with incomplete CE exams.RESULTS:The mean age for the entire study population was 54.7 years.Sixty-one percent of the study population was female,and gender was not different between IPs vs OPs(P = 0.07).The overall incomplete CECR was 14% in our study.Overt obscure gastrointestinal bleeding(OGB) was a significantly more common indication for the IP CE(P = 0.0001),while abdominal pain and assessment of IBD were more frequent indications for the OP CE exams(P = 0.002 and P = 0.01,respectively).Occult OGB was the most common indication and arteriovenous malformations were the most common finding both in the IPs and OPs.The capsule did not enter the small bowel(SB) in 6/70 IPs and 8/264 OPs(P = 0.04).The capsule never reached the cecum in 31.4%(22/70) of IP vs 9.5%(25/264) of OP examinations(P < 0.001).The mean gastric transit time(GTT) was delayed in IPs compared to OPs,98.5 ± 139.5 min vs 60.4 ± 92.6 min(P = 0.008).Minimal SB transit time was significantly prolonged in the IP compared to the OP setting [IP = 275.1 ±111.6 min vs OP = 244.0 ± 104.3 min(P = 0.037)].CECR was also significantly higher in the subgroup of patients with OGB who had OP vs IP exams(95% vs 80% respectively,P = 0.001).The proportion of patients with incomplete exams was higher in the ICU(n = 7/13,54%) as compared to the GMF(n = 15/57,26%)(P = 0.05).There was only a single permanent SB retention case which was secondary to a previously unknown SB stricture,and the remaining incomplete SB exams were due to slow transit.Medications which affect gastrointestinal system motility were tested both individually and also in aggregate in univariate analysis in hospitalized patients(ICU and GMF) and were not predictive of incomplete capsule passage(P > 0.05).Patient location(IP vs OP) and GTT were independent predictors of incomplete CE exams(P < 0.001 and P = 0.008,respectively).CONCLUSION:Incomplete CE is a multifactorial problem.Patient location and related factors such as severity of illness and sedentary status may contribute to incomplete exams.Cemal Yazici John Losurdo Michael D Brown Scott Oosterveen Robert Rahimi Ali Keshavarzian Leila Bozorgnia Ece Mutlu 2012World Journal of Gastroenterology2012,18,36:6
17Evaluating alternative stem cell hypotheses for adult corneal epithelial maintenance显示文摘In this review we evaluate evidence for three different hypotheses that explain how the corneal epithelium is maintained. The limbal epithelial stem cell(LESC)hypothesis is most widely accepted. This proposes that stem cells in the basal layer of the limbal epithelium, at the periphery of the cornea, maintain themselves and also produce transient(or transit) amplifying cells(TACs). TACs then move centripetally to the centre of the cornea in the basal layer of the corneal epithelium and also replenish cells in the overlying suprabasal layers. The LESCs maintain the corneal epithelium during normal homeostasis and become more active to repair significant wounds. Second, the corneal epithelial stem cell(CESC) hypothesis postulates that, during normal homeostasis, stem cells distributed throughout the basal corneal epithelium, maintain the tissue. According to this hypothesis, LESCs are present in the limbus but are only active during wound healing. We also consider a third possibility, that the corneal epithelium is maintained during normal homeostasis by proliferation of basal corneal epithelial cells without any input from stem cells. After reviewing the published evidence, we conclude that the LESC and CESC hypotheses are consistent with more of the evidence than the third hypothesis, so we do not consider this further. The LESC and CESC hypotheses each have difficulty accounting for one main type of evidence so we evaluate the two key lines of evidence that discriminate between them. Finally, we discuss how lineage-tracing experiments have begun to resolve the debate in favour of the LESC hypothesis. Nevertheless, it also seems likely that some basal corneal epithelial cells can act as long-term progenitors if limbal stem cell function is compromised. Thus, this aspect of the CESC hypothesis may have a lasting impact on our understanding of corneal epithelial maintenance, even if it is eventually shown that stem cells are restricted to the limbus as proposed by the LESC hypothesis.John D West Natalie J Dorà J Martin Collinson 2015World Journal of Stem Cells2015,7,2:6
18Design and simulation of self-powered radio frequency identification (RFID) tags for mobile temperature monitoring显示文摘This paper presents a design for a self-powered radio frequency identification (RFID) tag with a thin film bulk acoustic reso- nating piezoelectric power supply (PPS), which can be used for portable remote temperature monitoring. We call this system a PPS-RFID for short. The RFID systems have been found to have many applications in the internet of things (IOT) in the past decade. But semi-active RFID tags require an onboard battery which limits their applications in many fields. For these reasons, our research focuses on power sources for the RFID tags. This paper emphasizes the circuit design and simulation of PPS. In our tests, 0.283 mW was generated by PPS at 1 Hz vibration by a 650 N impact force. The results showed that the integrated PPS could supply sufficient power for the designed PPS-RFID tag. The PPS-RFID tag can be widely used for temperature monitoring during mobile transport of perishable items such as medicines or food.CHU HeQun WU GuangMin CHEN JianMing FEI Fei MAI John D LI Wen J 2013Science China(Technological Sciences)2013,56,1:6
19Clinical outcomes following salvage Gamma Knife radiosurgery for recurrent glioblastoma显示文摘Glioblastoma multiforme(GBM) is the most common malignant primary brain tumor with a survival prognosis of 14-16 mo for the highest functioning patients. Despite aggressive, multimodal upfront therapies, the majority of GBMs will recur in approximately six months. Salvage therapy options for recurrent GBM(r GBM) are an area of intense research. This study compares recent survival and quality of life outcomes following Gamma Knife radiosurgery(GKRS) salvage therapy. Following a Pub Med search for studies usingGKRS as salvage therapy for malignant gliomas, nine articles from 2005 to July 2013 were identified which evaluated rG BM treatment. In this review, we compare overall survival following diagnosis, overall survival following salvage treatment, progression-free survival, time to recurrence, local tumor control, and adverse radiation effects. This report discusses results for rG BM patient populations alone, not for mixed populations with other tumor histology grades. All nine studies reported median overall survival rates(from diagnosis, range:16.7-33.2 mo; from salvage, range:9-17.9 mo). Three studies identified median progression-free survival(range:4.6-14.9 mo). Two showed median time to recurrence of GBM. Two discussed local tumor control. Six studies reported adverse radiation effects(range:0%-46% of patients). The greatest survival advantages were seen in patients who received GKRS salvage along with other treatments, like resection or bevacizumab, suggesting that appropriately tailored multimodal therapy should be considered with each rG BM patient. However, there needs to be a randomized clinical trial to test GKRS for rG BM before the possibility of selection bias can be dismissed.Erik W Larson Halloran E Peterson Wayne T Lamoreaux Alexander R MacKay Robert K Fairbanks Jason A Call Jonathan D Carlson Benjamin C Ling John J Demakas Barton S Cooke Christopher M Lee 2014World Journal of Clinical Oncology2014,5,2:5
20分子印迹型薄膜体声波谐振毒品检测传感器显示文摘针对毒品探测的需求,对高灵敏度、高选择性及可工作于液相环境中的传感器进行了研究,利用分子印迹技术(MIT),结合薄膜体声波谐振器(FBAR)和微流体(micro fluidics)技术构造了新型传感器。首先,阐述了用分子印迹技术制作FBAR吸附层材料的原理,利用分子印迹技术制备了对特定毒品分子具有专一吸附性的印迹材料,将其作为吸附层涂覆在基于微机电系统(MEMS)及微流体技术的FBAR上。根据压电方程和运动学方程推导出了FBAR压电振子的等效电路及电学端口输入阻抗公式,构建了以AlN为压电材料的微流体结构FBAR毒品检测传感器模型。对该结构的FBAR传感器进行了理论研究和公式推导,并在理论模型的基础上进行了仿真实验,得到了单位面积质量响度达0.8 pg/Hz·cm2的FBAR传感器。得到的实验结果远高于石英晶体微天平这一传统的质量敏感型传感器,可实现对溶液中毒品分子的快速检测。陈剑鸣 吕启蒙 吴光敏 楚合群 John D Mai 2013光学精密工程2013,21,9:5
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