简介:摘要目的探讨血清及胸水P53抗体水平检测对肺癌诊断价值和临床意义。方法采用酶联免疫吸附法(ELISA)检测36例肺癌患者、29例经手术或化疗治疗后的肺癌患者血清P53抗体,并以30例健康体检者作对照,其中15例肺癌患者同时检测胸水P53抗体,以16例良性胸水作为对照。结果肺癌组血清P53抗体水平为3.879±5.963IU/ml,明显高于对照组0.144±0.019IU/ml,且差异有高度显著性(P<0.01),阳性率为52.8%;在肺癌治疗组,血清P53抗体水平为1.86±2.914IU/ml,阳性率为34.5%,而且与对照组和未治疗肺癌组差异无显著性(P>0.05);肺癌胸水P53抗体水平18.95±7.319IU/ml高于良性胸水对照组0.267±0.318IU/ml,且具有高度显著性差异(P<0.01),阳性率86.7%。结论检测血清及胸水P53抗体水平有助于肺部良恶性疾病的诊断及鉴别诊断,血清P53抗体可成为肺癌的血清标志物,胸水P53抗体检测比血清更具敏感性。
简介:摘要p53基因是一种常见的抑癌基因,它几乎参与了人类所有肿瘤的生物学过程。骨肉瘤是一种最常见的骨原发恶性肿瘤,p53基因改变是骨肉瘤发生发展过程中的一个重要事件,并影响着化疗效果和预后。现就p53基因在骨肉瘤中的研究做一综述。
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.
简介:Toevaluatetheeffectofadenovirus-mediatedp53gene(Adp53)onapoptosisandradiosensitivityofhumangastriccarcinomacelllines.Methods:Recombinantadenovirusexpressingwild-typep53lineswithdifferentp53geneticstatus.p53proteinexpressionwasdetectedbyimmunohistochemistryassayandwesternblotassay.Cellsurvivalwasassessedusingaclonogenicassay.TUNELassaywasusedindeterminationofapoptosis.FourhumangastriccarcinomacellsinfectedwithAdp53wereirradiatedwith4GyandcellcycledistributionandSub-G1peakwereassayedbyflowcytometry.Results:G2/Marrest,apoptosisandinhibitionoftumorcellproliferationwereinducedbyinfectionatAdp53at100MOIwhichcausedhightransferrateofwild-typep53andstrongexpressionofp53proteininfourhumangastriccarcinomacells.Theradio-enhancementratioofAdp53at4Gywere3.0forWcell,3.6forMcell,2.2forneocelland2.5for823cellinvitro.Conclusion:ThisstudydemonstratedthatAdp53transferincreasedcellularapoptosisandradiosensitivityofhumangastriccarcinomacelllinesinvitroindependentlyoncellularintrinsicp53statusthussupportingthecombinationofp53genetherapywithradiotherapyinclinicaltrials.
简介:目的探讨刨吸术(TriVex,transilluminatedpoweredphlebectomy)治疗大隐静脉曲张的疗效.方法2003年3月~2005年6月,我院对53例(74条肢体)大隐静脉曲张行TriVex治疗.所有患肢术前均行Doppler超声证实深静脉通畅,腰麻下高位结扎并抽剥大隐静脉主干,对曲张的分支采用TriVex系统进行刨吸.结果53例手术均获成功.单条肢体手术时间24~65min,(38.1±7.2)min;切口数量3~6个,(4.8±0.8)个,住院时间4~15d,(9.5±2.2)d.术后患肢出现皮下淤血42条,血肿3条,肢体局部麻木感29条,无深静脉血栓形成.49例(68条肢体)随访2~24个月,(6.0±4.3)月,皮下淤血及血肿消退,肢体局部麻木感消失20条,减轻9条,患肢小腿部无明显手术瘢痕;原有溃疡愈合,色素沉着减轻,沉重感缓解,无静脉曲张复发.结论TriVex治疗下肢静脉曲张具有创伤小、美容效果好的特点,但仍有一定的并发症需要防治.