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| 1 | Acute lower gastrointestinal bleeding from a dieulafoy lesion proximal to the anorectal junction post-orthotopic liver transplant显示文摘A 67-year-old woman underwent an orthotopic liver transplantation for end stage liver disease secondary to chronic autoimmune hepatitis. She developed sudden massive hematochezia on post-operative day 23 with hemodynamic compromise. The source of hemorrhage was found at colonoscopy after careful irrigation and inspection to be a dieulafoy lesion situated just proximal to the anorectal junction. Hemostasis was achieved with epinephrine injection and thermal coagulation. | Wichian Apiratpracha Jin Kee Ho James J Powell Eric M Yoshida | 2006 | World Journal of Gastroenterology2006，12，46： | 12 |
| 2 | Leukemia:研究鉴定出与34种AML白血病亚群相关联的基因突变显示文摘针对成年急性髓细胞白血病(acute myeloid leukemia,AML)患者的一项新的大型研究将80种癌症相关基因突变与5种AML亚型相关联。这5种AML亚型可通过特异性的染色体异常加以确定。在未来,这些发现可能有助指导基因突变测试和治疗决策。 | A-K Eisfeld K Mrózek J Kohlschmidt D Nicolet S Orwick C J Walker K W Kroll J S Blachly A J Carroll J E Kolitz B L Powell E S Wang R M Stone A de la Chapelle J C Byrd C D Bloomfield | 2017 | 现代生物医学进展2017，17，15： | 7 |
| 3 | 帕博利珠单抗联合以铂类为基础的化疗治疗非小细胞肺癌合并稳定性脑转移患者的结局:KEYNOTE-021、-189和-407研究的汇总分析显示文摘背景与目的此项探索性分析回顾评价了晚期非小细胞肺癌(non-small cell lung cancer,NSCLC)患者的结局,旨在确定基线时合并脑转移是否会影响一线应用帕博利珠单抗联合化疗(pembrolizumab plus chemotherapy,PC)比对单用化疗的疗效。患者和方法对KEYNOTE-021队列G(非鳞癌)、KEYNOTE-189(非鳞癌)和KEYNOTE-407(鳞癌)三项研究晚期NSCLC患者的数据进行汇总分析。患者接受含铂两药化疗和/或35个周期帕博利珠单抗治疗(每3周200 mg)。所有研究均纳入了经治或初治的稳定性脑转移患者(KEYNOTE-189与KEYNOTE-407研究纳入初治脑转移患者)。经治的脑转移患者已处于病情稳定的状态≥2周(KEYNOTE-021队列G患者≥4周),无新发或脑转移病灶扩大的证据且入组前至少3天以上未使用激素。初治的无症状脑转移患者需定期接受脑部影像学检查。结果共纳入1298例患者,其中171例有基线脑转移,1127例无脑转移。两组的中位随访时间(范围)在数据截止时分别为10.9(0.1-35.1)个月和11.0(0.1-34.9)个月。合并脑转移和无脑转移患者的总生存期[0.48(95%CI:0.32-0.70)和0.63(95%CI:0.53-0.75)]和无进展生存期[0.44(95%CI:0.31-0.62)和0.55(95%CI:0.48-0.63)]的风险比(PC/化疗)相似。合并脑转移的患者中,PC组和单用化疗组患者的中位总生存期分别为18.8个月和7.6个月,中位无进展生存期分别为6.9个月和4.1个月。无论是否合并脑转移,PC组患者的客观缓解率都高于单用化疗组,且缓解持续时间有显著延长。合并脑转移的患者中,PC组与单用化疗组的治疗相关不良事件发生率分别为88.2%和82.8%;而无脑转移的患者中,两组治疗相关不良事件的发生率分别为94.5%和90.6%。结论无论是否合并脑转移,与单用化疗相比,帕博利珠单抗联合以铂类为基础的组织学特异性化疗可改善所有PD-L1亚组的临床结局,其中包括PD-L1肿瘤比例评分<1%的患者,并且在晚期NSCLC患者中安全性良好。该方案是晚期NSCLC初治患者的标准方案,并可用于合并稳定性脑转移的患者。 | 周清(翻译校对) Steven F Powell Delvys Rodríguez-Abreu Corey J Langer Ali Tafreshi Luis Paz-Ares Hans-Georg Kopp Jeronimo Rodríguez-Cid Dariusz M Kowalski Ying Cheng Takayasu Kurata Mark M Awad Jinaxin Lin Bin Zhao M Catherine Pietanza Bilal Piperdi Marina C Garassino | 2022 | 中国肺癌杂志2022，25，1： | 6 |
| 4 | 新致病基因在颅缝早闭Crouzon综合征中的初步机制研究显示文摘目的研究Rbp4(Retinol binding protein 4)、Gpc3(Glypican family of growth factor binding protein 3)、C1qtnf3(Collagenous repeat-containing sequence of 26 KDa protein)等新致病基因在颅缝早闭症中的发病机制,为疾病非手术治疗奠定理论基础。方法以Crouzon综合征Fgfr2cC342Y/+小鼠为实验模型,应用MicroCT和组织学染色,研究小鼠颅缝闭合模式;以Fgfr2cC342Y/+模型,RT-qPCR研究Rbp4、Gpc3、C1qtnf3等新致病基因的表达差异,初步探讨其在颅缝闭合过程中的调控作用;以体外培养的Fgfr2cC342Y/+小鼠颅缝细胞为模型,研究基因突变动物细胞增殖与代谢改变。结果获得Fgfr2cC342Y/+小鼠后额缝、冠状缝、人字缝、矢状缝等颅缝闭合模式,随颅骨发育、颅缝闭合,OC(Osteocalcin)、ALP(Alkalinephosphatase)表达增加,目的基因Rbp4、Gpc3、C1qtnf3表达下降,Msx2(Muscle segment homeobox gene 2)表达增加,杂合子与野生型小鼠之间均存在显著统计学差异,与前期人颅缝组织Microarray研究结果一致。Gpc1(Glypican family ofgrowth factor binding protein 1)、FliI(Flightless I)在颅缝闭合中的表达较恒定,野生型与杂合子之间未见明显统计学差异。体外培养Fgfr2cC342Y/+小鼠颅缝细胞,CellTiter96 MTS和Quant-iT Picogreen dsDNA细胞增殖与代谢分析结果显示,Fgfr2功能获得性突变可促进冠状缝细胞的增殖,从而导致成骨增加,颅缝早闭。结论 Fgfr2cC342Y/+模型新致病基因表达趋势与前期人颅缝组织Microarray研究结果一致,Rbp4、Gpc3、C1qtnf3可能在颅缝早闭中具重要调控作用。 | 杨娴娴 Jodie T Hatfield Susan J Hinze 穆雄铮 Peter J Anderson Barry C Powell | 2012 | 组织工程与重建外科杂志2012，8，5： | 3 |
| 5 | Macrophage secretory products induce an inflammatory phenotype in hepatocytes显示文摘AIM:To investigate the influence of macrophages on hepatocyte phenotype and function.METHODS:Macrophages were differentiated from THP-1 monocytes via phorbol myristate acetate stimulation and the effects of monocyte or macrophageconditioned medium on HepG2 mRNA and protein expression determined.The in vivo relevance of these findings was confirmed using liver biopsies from 147 patients with hepatitis C virus(HCV)infection.RESULTS:Conditioned media from macrophages,but not monocytes,induced a transient morphological change in hepatocytes associated with upregulation of vimentin(7.8±2.5-fold,P=0.045)and transforming growth factor(TGF)-β1(2.6±0.2-fold,P<0.001)and downregulation of epithelial cadherin(1.7±0.02-fold,P=0.017)mRNA expression.Microarray analysis revealed significant upregulation of lipocalin-2(17-fold,P <0.001)and pathways associated with inflammation,and substantial downregulation of pathways related to hepatocyte function.In patients with chronic HCV,realtime polymerase chain reaction and immunohistochemistry confirmed an increase in lipocalin-2 mRNA(F0 1.0 ±0.3,F1 2.2±0.2,F2 3.0±9.3,F3/4 4.0±0.8,P= 0.003)and protein expression(F1 1.0±0.5,F2 1.3± 0.4,F3/4 3.6±0.4,P=0.014)with increasing liver injury.High performance liquid chromatography-tandem mass spectrometry analysis identified elevated levels of matrix metalloproteinase(MMP)-9 in macrophageconditioned medium,and a chemical inhibitor of MMP-9 attenuated the change in morphology and mRNA expression of TGF-β1(2.9±0.2 vs 1.04±0.1,P<0.001) in macrophage-conditioned media treated HepG2 cells.In patients with chronic HCV infection,hepatic mRNA expression of CD163(F0 1.0±0.2,F1/2 2.8±0.3,F3/4 5.3±1.0,P=0.001)and MMP-9(F0 1.0±0.4,F1/2 2.8±0.3,F3/4 4.1±0.8,P=0.011)was significantly associated with increasing stage of fibrosis.CONCLUSION:Secreted macrophage products alter the phenotype and function of hepatocytes,with increased expression of inflammatory mediators,suggesting that hepatocytes actively participate in liver injury. | Michelle Melino Victoria L Gadd Gene V Walker Richard Skoien Helen D Barrie Dinesh Jothimani Leigh Horsfall Alun Jones Matthew J Sweet Gethin P Thomas Andrew D Clouston Julie R Jonsson Elizabeth E Powell | 2012 | World Journal of Gastroenterology2012，18，15： | 3 |
| 6 | Performance limiting micropipe defects in silicon carbide wafers 显示文摘 | NEUDECK P G POWELL J A | 1994 | IEEE Electron Device Lett1994，15，： | 2 |
| 7 | Senescent human hepatocytes express a unique secretory phenotype and promote macrophage migration显示文摘AIM:To develop a model of stress-induced senescence to study the hepatocyte senescence associated secretory phenotype(SASP).METHODS:Hydrogen peroxide treatment was used to induce senescence in the human Hep G2 hepatocyte cell line.Senescence was confirmed by cytochemical staining for a panel of markers including Ki67,p21,heterochromatin protein 1β,and senescence-associated-β-galactosidase activity.Senescent hepatocytes were characterised by gene expression arrays and quantitative polymerase chain reaction(q PCR),and conditioned media was used in proteomic analyses,a human chemokine protein array,and cell migration assays to characterise the composition and function of the hepatocyte SASP.RESULTS:Senescent hepatocytes induced classical markers of senescence(p21,heterochromatin protein1β,and senescence-associated-β-galactosidase activity);and downregulated the proliferation marker,Ki67.Hepatocyte senescence induced a 4.6-fold increase in total secreted protein(P=0.06)without major alterations in the protein profile.Senescence-induced genes were identified by microarray(Benjamini Hochbergcorrected P<0.05);and,consistent with the increase in secreted protein,gene ontology analysis revealed a significant enrichment of secreted proteins among inducible genes.The hepatocyte SASP included characteristic factors such as interleukin(IL)-8 and IL-6,as well as novel components such as SAA4,IL-32and Fibrinogen,which were validated by q PCR and/or chemokine protein array.Senescent hepatocyteconditioned medium elicited migration of inflammatory(granulocyte-macrophage colony stimulating factor,GM-CSF-derived),but not non-inflammatory(CSF-1-derived)human macrophages(P=0.022),which could contribute to a pro-inflammatory microenvironment in vivo,or facilitate the clearance of senescent cells.CONCLUSION:Our novel model of hepatocyte senescence provides insights into mechanisms by which senescent hepatocytes may promote chronic liver disease pathogenesis. | Katharine M Irvine Richard Skoien Nilesh J Bokil Michelle Melino Gethin P Thomas Dorothy Loo Brian Gabrielli Michelle M Hill Matthew J Sweet Andrew D Clouston Elizabeth E Powell | 2014 | World Journal of Gastroenterology2014，20，47： | 2 |
| 8 | Polymorphism revealed by simple sequence repeats 显示文摘 | Powell W Marchray G C and Provan J | 1996 | Trends in Plant Science1996，1，： | 2 |
| 9 | Mammalian keratin gene families: organization for genes coding for the B2 high-sulphur proteins sheep wool 显示文摘 | Powell B C Sleigh M J Ward K A | 1983 | Nucleic Acids Res1983，11，： | 1 |
| 10 | An efficient method for finding the niinimum of a function of several variables without calculating derivatives显示文摘 | Powell M J D | 1964 | Comput J1964，7，： | 1 |
| 11 | Characterization of bacteriocin ST8KF produced by a kefir isolate Lactobacillus plant arum ST8KF 显示文摘 | Powell J Witthuhna R Todorovb S | 2007 | International Dairy Journal2007，17，2： | 1 |
| 12 | The iron cage revisited:Institu-tional isomorphism and collective rationality in organizational fields显示文摘 | DiMaggio P J and Powell W | 1983 | American Sociological Review1983，48，2： | 1 |
| 13 | Introduction of gaseous hydrides into an inductively coupled plasma mass spectrometer显示文摘 | POWELL M J BOOMER D W MCVICARS R J | 1986 | Analytical Chemistry1986，58，13： | 1 |
| 14 | Construc- tion of Rhodococcus random mutagenesis libraries u- sing Tn5 transposition complexes 显示文摘 | Fernandes P J Powell J A C Archer J A (2 | 2001 | Mierobiology- Sgm2001，147，： | 1 |
| 15 | Gene length and codon us age bias in Drosophila raelanogaster, SaccharomS, ces cerevisiae and Escherichia coli显示文摘 | Moriyama E N Powell J R | 1998 | Nucleic Acids Res1998，26，13： | 1 |
| 16 | Radiofrequency volumetrictissue reduction of the palate in subjects with sleep-disorderedbreathing显示文摘 | Powell N B Riley R W Troell R J | 1998 | Chest1998，113，： | 1 |
| 17 | Coupled finite-element codes for armature design显示文摘 | NEWILL J F POWELL J D ZIELINSKI A E | 2003 | IEEE Transac- tions on Magneties2003，39，1： | 1 |
| 18 | Emergy evaluation of the performance and sustainability of three agricultural systems with different scales and management显示文摘 | Martin J F Diemont S A W Powell E Stanton M Levy-Tacher S | 2006 | Agriculture Ecosystems&Environment2006，115，14： | 1 |
| 19 | Network dynamics and fieldevolution:the growth of interorganizational collaboration in the life sciences显示文摘 | Powell W.W White D.R Koput K.W Owen-Smith J | | 0，，04： | 1 |
| 20 | Multiple roles for the receptor tyrosine kinase axl in tumor formation显示文摘 | Holland S J Powell M J Franci C | | 0，，20： | 1 |
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