简介：死亡联系域的蛋白质Daxx施加包括调停的许多报导功能经由激活c6月N终端从FasL发信号到apoptosisapoptosis的kinase(JNK)，正式就职和抑制，和染色质改变的规定。它原来从酵母被克隆用船边交货对相似物体之连续感觉而形成心像口的细胞内部的尾巴的二混血儿的屏幕诱饵。而许多起始的报告仍然保持争论，Daxx在一系列压力信号包括UVirradiation，过氧化氢治疗和TGF-β治疗触发的apoptosis的规定起重要作用，是清楚的。在这评论，我们在Axinbeing上集中连接Daxx到p53的一个拴住的因素。

简介：TherearetwopossibleoutcomeswhenDNAdamageoccursinnormalmammaliancells:eitherinductionofcell-cyclecheckpointwhichinhibitstheprogressofthecellcyclesaswellasactivatesDNArepairpathways,oractivationofapoptosistoeliminatedamagedcells.Thep53tumour-suppressorgeneplaysakeyroleinselectingthesepathways.Inourpresentworks,thehumangastriccancercelllineAGSwastreatedwithtripchlorolide,apotentantitumorcompoundpurifiedfromaChineseherbTripterygiumWilfordiiHook.Singlecellgelelectrophoresis(Cometassay)showedthatthetreatmentoftripchlorolideresultedinDNAdamageinAGScells.ThedamagedAGScellswentthroughapoptosis,whichwastime-anddose-dependent.

简介：Recentstudiesindicatethatcell-cyclecheckpointsaretightlycorrelatedwiththeregulationofapoptosis,inwhichp53playsanimportantrole.OurpresentworksshowthattheexpressionofE6/E7oncogenesofhumanpapillomavirusinHeLacellsisinhibitedinthepresenceofanti-tumorreagenttripchlorolide(TC),whichresultsintheup-regulationofp53inHeLacells.Interestingly,underthesameTC-treatment,thecellsattheearlyS-phasearemoresusceptibletoapoptosisthanthoseatthemiddleS-phasealthoughp53proteinisstabilizedtothesamelevelinbothsituations.Significantdifferenceisexhibitedbetweenthetwospecifiedexpressionprofiles.Furtheranalysisdemonstratesthatanti-apoptoticgenesurvivinisup-regulatedbyp53intheTC-treatedmiddle-Scells,whereasitisdown-regulatedbyp53intheTC-treatedearly-Scells.Takentogether,thepresentstudyindicatesthatthedifferentialp53-regulatedexpressionofsurvivinatdifferentstagesofthecellcycleresultsindifferentcellularoutputsunderthesameapoptosis-inducer.

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简介：目的：研究SOX4和p53蛋白之间的相互作用。方法：应用GSTpull-down、免疫共沉淀实验验证相互作用。结果：GSTpulldown实验证实SOX4能结合GST-p53融合蛋白,但不能结合GST蛋白;免疫共沉淀实验也证明,SOX4与p53能在细胞内发生相互作用。结论：SOX4能与p53发生相互作用,为p53信号通路的研究提供了新的线索。

简介：目的：探讨survivin在肺鳞癌、腺癌组织中的表达、临床意义及其与P53表达的临床病理相关性。方法：采用免疫组织化学（Envision二步法）检测survivin和P53在65例肺鳞癌、腺癌组织及15例肺良性病变组织中的表达情况。结果：survivin、P53的阳性率分别为58.5%（38/65）、53.8%（35/65）,显著高于肺良性病变组织的0（0/15）、0%（0/15）;survivin表达与肺鳞癌、腺癌的低分化（P〈0.05）、淋巴结转移呈正相关（P〈0.05）,与患者预后负相关（P〈0.O5）;P53的表达与肺癌组织的分化程度、TNM分期及淋巴结转移均有关（P〈0.05）;并且Survivin表达与P53表达呈正相关（P〈0.05）。结论：Survivin的表达与肺鳞癌、腺癌的低分化、淋巴结转移正相关;过度表达提示预后不良;Survivin有望成为肺癌诊断和基因治疗的新靶点;survivin和p53的协同表达可能是促进肺癌的恶性进展的重要因素。

简介：OverexpressionandactivationofHER-2/neu(alsoknownasc-erbB-2),aproto-oncogene,wasfoundinabout30%ofhumanbreastcancers,promotingcancergrowthandmakingcancercellsresistanttochemo-andradio-therapy.Wild-typep53iscrucialinregulatingcellgrowthandapoptosisandisfoundtobemutatedordeletedin60-70%ofhumancancers.Andsomecancerswithawild-typep53donothavenormalp53function,suggestingthatitisimplicatedinacomplexprocessregulatedbymanyfactors.Inthepresentstudy,weshowedthattheoverexpressionofHER-2/neucoulddecreasetheamountofwild-typep53proteinviaactivatingPI3Kpathway,aswellasinducingMDM2nucleartranslocationinMCF7humanbreastcancercells.BlockageofPI3KpathwaywithitsspecificinhibitorLY294002causedG1-Sphasearrest,decreasedcellgrowthrateandincreasedchemo-andradio-therapeuticsensitivityinMCF7cellsexpressingwild-typep53.However,itdidnotincreasethesensitivitytoadriamycininMDA-MB-453breastcancercellscontainingmutantp53.OurstudyindicatesthatblockingPI3KpathwayactivationmediatedbyHER-2/neuoverexpressionmaybeusefulinthetreatmentofbreasttumorswithHER-2/neuoverexpressionandwild-typep53.