学科分类
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10 个结果
  • 简介:Dermatofibrosarcomaprotuberans(DFSP),themostcommondermalsarcoma,isalow-grade,slowgrowingfibroblasticmalignantneoplasmthatmostfrequentlyaffectsmiddleagedadultsandischaracterizedbyahighlocalrecurrencerateandalowpropensityformetastasis.WidesurgicalresectionorMohsmicrographicsurgery(MMS)arethepreferredapproachesforlocalizeddisease,whileradiationtherapyiswarrantedforinoperablediseaseorforcaseswithpositivemarginswherere-excisionisnotpossible.DFSPisgenerallyregardedasrefractorytoconventionalchemotherapy.Treatmentoptionsforsystemicdiseasewerelimiteduntilthediscoveryofauniquetranslocation,t(17;22)(q22;q13)(COL1A1;PDGFB)foundinamajorityofcases.Inrecentyears,imatinib,aPDGFβR,ABLandKITinhibitor,hasrevolutionizedsystemictherapyinDFSP.Inthisreview,wesummarizetheepidemiological,clinical,histologicalandgeneticcharacteristicsofDFSPandupdatethereadersonitscurrentmanagement.

  • 标签: 靶向治疗 皮肤肿瘤 纤维肉瘤 全身性疾病 转运 显微外科手术
  • 简介:Despitethefactthatironisoneofthemostabundantelementsoftheearth'scrust,irondeficienciesareseriousproblemsbothinhumannutrition[1]andinagriculture[2].Sixtoeightpercentoftheworld'spopulationispotentiallyaffectedbyirondeficiencyinducedanemia,aleadingcauseofmaternaldeathinAfricanandAsiancountrieswherepeoplerelymostlyonplantsfortheirdailyintakeofiron.Ironcanalsobealimitingfactorinthegrowthofeconomicallyimportantcropplantsbecauseofinadequatesoilchemistry,andsuchdeficienciescannoteasilybecorrectedbyamendingthesoil.Improvingtheplant'sabilitytoabsorbironinadverseconditionsandtoincreasetheiroverallcontentcouldoffersolutionstothesedramaticproblems.Thereforeunderstandingthemolecularmechanismsregulatingironuptakeandhomeostasisinplantshaspotentiallyimportantpracticalapplicationsbothinagricultureandhumanhealth[3].

  • 标签: 植物 铁稳态 铁转运 转录 易位 基因表达
  • 简介:通过相互作用精力坡度nanopore的聚合物链的translocation时间被蒙特卡罗模拟和佛克普朗克常数方程与双absorbing边界条件学习。模拟和计算为聚合物translocation揭示了三不同行为。这些行为能从在不同参数为聚合物translocation获得的免费精力的风景被解释品质上。结果证明通过nanopore的聚合物链的translocation时间能被合适设计相互作用精力坡度调节。

  • 标签: 聚合物链 能量梯度 纳米孔 运转时间 福克-普朗克方程 吸收边界条件
  • 简介:在脂肪和肌肉房间,刺激胰岛素的葡萄糖举起被葡萄糖transporter主要调停4(GLUT4),哪个到响应胰岛素刺激的房间表面的从细胞内部的分隔空间的translocates。AS160是Akt的底层之一并且在调整胰岛素的GLUT4translocation起重要作用。在这研究,(RUVBL2)象RuvB一样蛋白质2用与集体spectrometry相结合的哺乳动物的双人脚踏车亲密关系纯化(龙头)作为新AS160有约束力的蛋白质被识别。在3T3-L1adipocytes,RUVBL2高度被表示并且在cytosol主要是分布式的。在adipocytes的RUVBL2的弄空通过减少刺激胰岛素的AS160phosphorylation禁止刺激胰岛素的GLUT4translocation和葡萄糖举起。然而,人的RUVBL2的介绍能颠倒这禁止的效果。这些数据建议RUVBL2通过它和AS160的相互作用在刺激胰岛素的GLUT4translocation起一个重要作用。

  • 标签: 结合蛋白 转位 葡萄糖转运体 串联亲和纯化 脂肪细胞 肌肉细胞
  • 简介:Wntsignalingplaysanimportantroleinembryogenesisandtumorgenesis.AlthoughthemechanismabouthowWntstransducetheirsignalingfromreceptorfrizzled(Fz)tocytosolhasnotbeenunderstood,dishevelled(Dvl)proteinwasconsideredastheintersectionofWntsignaltraffic.Inthisstudy,wecharacterizedthefunctionofthreedomains(DIX,PDZandDEP)ofDvl-1incanonicalWntsignaltransductionandDvl-1membranetranslocation.ItwasfoundbothDIXandDEPdomainweresufficienttoblockWnt-3a-inducedLEF-1transcriptionalactivityandfreecytosolβ-cateninaccumulation;whereasPDZdomainandafunctionalmutantformofDEPdomain(DEP-KM)hadnoeffectoncanonicalWntsignaling.Inaddition,whencotransfectedwithFz-7,DEPdomain,butnotDIX,PDZorDEP-KM,translocatedandco-localizedwithFz-7totheplasmamembrane,whichwassimilartoDvl-1.Furthermore,itwasDEPdomainthatcouldblockFz-7-inducedmembranetranslocationofDvl-1viaapossiblecompetitivemechanism.TheseresultsstronglysuggestthatDEPdomainisresponsibleforthemembranetranslocationofDvl-1proteinuponWntsignalstimulation.

  • 标签: 信号转导 膜易位 WNT 基因 蛋白质
  • 简介:AIM:Toinvestigatetheanti-tumoreffectsofnuclearfactor-κB(NF-κB)inhibitorSN50andrelatedmechanismsofSGC7901humangastriccarcinomacells.METHODS:MTTassaywasusedtodeterminethecytotoxiceffectsofSN50ingastriccancercelllineSGC7901.Hoechst33258stainingwasusedtodetectapoptosismorphologicalchangesafterSN50treatment.Activationofautophagywasmonitoredwithmonodansylcadaverine(MDC)stainingafterSN50treatment.Immunofluorescencestainingwasusedtodetecttheexpressionoflightchain3(LC3).MitochondrialmembranepotentialwasmeasuredusingthefluorescentprobeJC-1.Westernblottinganalysiswereusedtodeterminetheexpressionofproteinsinvolvedinapoptosisandautophagyincludingp53,p53upregulatedmodulatorofapoptosis(PUMA),damage-regulatedautophagymodulator(DRAM),LC3andBeclin1.Wedetectedtheeffectsofp53-mediatedautophagyactivationontheapoptosisofSGC7901cellswiththep53inhibitorpifithrin-α.RESULTS:TheviabilityofSGC7901cellswasinhibitedafterSN50treatment.Inductionsintheexpressionofapoptoticproteinp53andPUMAaswellasautophagicproteinDRAM,LC3andBeclin1weredetectedwithWesternblottinganalysis.SN50-treatedcellsexhibitedpunctuatemicrotubule-associatedprotein1LC3inimmunoreactivityandMDC-labeledvesiclesincreasedaftertreatmentofSN50byMDCstaining.CollapseofmitochondrialmembranepotentialΔψweredetectedfor6to24hafterSN50treatment.SN50-inducedincreasesinPUMA,DRAM,LC3andBeclin1andcelldeathwereblockedbythep53specificinhibitorpifithrin-α.CONCLUSION:Theanti-tumoractivityofNF-κBinhibitorsisassociatedwithp53-mediatedactivationofautophagy.

  • 标签: 细胞凋亡 P53 自噬 激活 免疫荧光染色法 WESTERN印迹
  • 简介:Resistancetocisplatin(DDP)-basedchemotherapyisamajorcauseoftreatmentfailureinhumangastriccancer(GC).Itisnecessarytoidentifythedrugstore-sensitizeGCcellstoDDP.Inourpreviousresearch,ZuoJinWanFormula(ZJW)hasbeenprovedcouldincreasethemitochondrialapoptosisviacofilin-1inaimmortalizedcellline,SGC-7901/DDP.Duetotheimmortalizedcellsmaystilldifficulthighlyrecapitulatetheimportantmoleculareventsinvivo,primaryGCcellsmodelderivedfromclinicalpatientwasconstructedinthepresentstudytofurtherevaluatetheeffectofZJWandtheunderlyingmolecularmechanism.ImmunofluorescentstainingwasusedtoindentifyprimaryculturedhumanGCcells.Westernblottingwascarriedouttodetecttheproteinexpression.CellCountingKit-8(CCK-8)wasusedtoevaluatecellproliferation.Flowcytometryanalysiswasperformedtoassesscellapoptosis.ZJWinhibitedproliferationandinducedapoptosisinprimaryDDP-resistantGCcells.Notably,theapoptosisinGCcellswasmediatedbyinducingcofilin-1mitochondrialtranslocation,down-regulatingBcl-2andup-regulatingBaxexpression.Surprisingly,thelevelofp-AKTproteinwashigherinDDP-resistantGCcellsthanthatoftheDDP-sensitiveGCcells,andtheactivationofAKTcouldattenuateZJW-inducedsensitivitytoDDP.ThesedatarevealedthatZJWcanincreasethechemosensitivityinDDP-resistantprimaryGCcellsbyinducingmitochondrialapoptosisandAKTinactivation.ThecombiningchemotherapywithZJWmaybeaneffectivetherapeuticstrategyforGCchemoresistancepatients.

  • 标签: PRIMARY GC cells ZJW AKT CHEMORESISTANCE
  • 简介:Theacquisitionofsecondarychromosomalaberrationsinchronicmyeloidleukemia(CML)patientswithPhiladelphiachromosome-positive(Ph+)karyotypesignifiesclonalevolutionassociatedwiththeprogressionofthediseasetoitsacceleratedorblasticphase.Therefore,theseaberrationshaveclinicalandbiologicalsignificance.T(3;12)(q26;p13),whichisarecurrentchromosomalaberrationobservedinmyeloidmalignancies,istypicallyassociatedwithdysplasiaofmegakaryocytes,multilineageinvolvement,shortdurationofanyblasticphase,andextremelypoorprognosis.Wehaveidentifiedarecurrentreciprocaltranslocationbetweenchromosomes3and12withdifferentbreakpointatbands3q21inthemalignantcellsfroma28-year-oldman.ThepatientwasinitiallydiagnosedashavingPh+CMLinthechronicphase.Thet(3;12)(q21;p13)translocationoccurred4yearsafterthepatientwasfirstdiagnosedwithCMLwhileundergoingtyrosinekinaseinhibitortherapy.Weconfirmedthet(3;12)(q21;p13)translocationviafluorescenceinsituhybridizationassaybyusingwhole-chromosomepaintprobesforchromosomes3and12.Ourfindingsdemonstratethat,similartootherrecurrenttranslocationsinvolving3q26suchast(3;3)andt(3;21),thet(3;12)(q21;p13)translocationisimplicatednotonlyinmyelodysplasticsyndromeandacutemyeloidleukemiabutalsointheprogressionofCML.Thesefindingsextendthediseasespectrumofthiscytogeneticaberration.

  • 标签: 慢性粒细胞白血病 染色体易位 治疗 染色体畸变 酪氨酸激酶抑制剂 尼罗
  • 简介:AbstractBackground:Myocardial infarction occurs due to insufficient (ischemia) blood supply to heart for long time; plasmacytoma variant translocation 1 (PVT1) is a long non-coding RNAs (lncRNAs) involved in the pathogenesis of various diseases, including heart disease; However, few studies have explored its role. The present study evaluated the effects of lncRNA PVT1 on hypoxic rat H9c2 cells.Methods:Hypoxic injury was examined by measuring cell viability and apoptosis by using cell counting kit-8 activity and flow cytometry assays. Gene expressions after hypoxia were estimated by quantitative real time polymerase chain reaction and the signaling pathway were explored by Western blot analysis. RNA immunoprecipitation and luciferase reporter assays were applied to examine the interactions among genes. Data were analyzed using t-test with one-way or two-way analysis of variance.Results:The lncRNA PVT1 is up-regulated in hypoxia-stressed H9c2 cells and knockdown of PVT1 mitigates hypoxia-induced injury in H9c2 cells. PVT1 acts as a sponge for miR-135a-5p and knockdown of PVT1 attenuated the increased hypoxia-induced injury by up-regulating miR-135a-5p. Forkhead box O1 (FOXO1) was identified as a target of miR-135a-5p, and the expression was negatively regulated by miR-135a-5p. The exploration of the underlying mechanism demonstrated that knockdown of FOXO1 reversed PVT1/miR-135a-5p mediated hypoxia-induced injury in H9c2 cells.Conclusions:PVT1 plays a crucial role in hypoxia-injured H9c2 cells through sponging miR-135a-5p and then positively regulating FOXO1.

  • 标签: Acute myocardial infarction PVT1 miR-135a-5p FOXO1