简介:X-irradiationhasabeneficialeffectintreatingspinalcordinjury.WesupposedthatX-irradiationcouldimprovethemicroenvironmentatthesiteofaspinalcordinjuryandinhibitglialscarformation.Thus,thisstudywasdesignedtoobservetheeffectsof8GyX-irradiationontheinjurysiteat6hoursand2,4,7,and14dayspostinjury,intermsofimprovementinthemicroenvironmentandhindlimbmotorfunction.ImmunohistochemistryshowedthattheexpressionofmacrophagemarkerED-1andtheareawithglialscarformationwerereduced.Inaddition,theBasso,BeattieandBresnahanscorewashigherat7dayspostinjuryrelativetotheothertimepointspostinjury.ResultsindicatedthatX-irradiationatadoseof8Gycaninhibitglialscarformationandalleviatetheinflammatoryreaction,therebyrepairingspinalcordinjury.X-irradiationat7dayspostspinalcordinjurymaybethebesttimewindow.
简介:HeavyionbeamswithhighlinearenergytransferexhibitmorebeneficialphysicalandbiologicalperformancethanconventionalX-rays,thusimprovingthepotentialofthistypeofradiotherapyinthetreatmentofcancer.However,thesetworadiotherapymodalitiesbothcauseinevitablebraininjury.TheobjectiveofthisstudywastoevaluatetheeffectsofheavyionandX-rayirradiationonthecytoskeletonandcytomechanicalpropertiesofratcorticalneurons,aswellastodeterminethepotentialmechanismofneuronalinjuryafterirradiation.Corticalneuronsfrom30new-bornmicewereirradiatedwithheavyionbeamsatasingledoseof2GyandX-raysatasingledoseof4Gy;subsequentevaluationoftheireffectswerecarriedoutat24hoursafterirradiation.AnimmunofluorescenceassayshowedthatafterirradiationwithboththeheavyionbeamandX-rays,thenumberofprimaryneuronswassignificantlydecreased,andtherewasevidenceofapoptosis.Radiation-inducedneuronalinjurywasmoreapparentafterX-irradiation.Underatomicforcemicroscopy,theneuronalmembraneappearedroughandneuronalrigidityhadincreased.ThesecellchangesweremoreapparentfollowingexposuretoX-rays.OurfindingsindicatedthatdamagecausedbyheavyionandX-rayirradiationresultedinthestructuraldistortionandrearrangementofthecytoskeleton,andaffectedthecytomechanicalpropertiesofthecorticalneurons.Moreover,thisradiationinjurytonormalneuronswasmuchsevererafterirradiationwithX-raysthanafterheavyionbeamirradiation.
简介:目的:探讨癌基因表达的变化与辐射性细胞放射损伤的关系.方法:采用免疫组化技术检测人脑星形细胞瘤细胞系经X射线处理前后p53、c-myc、bcl-2基因表达的变化;采用原位杂交方法检测p53基因在mPNA水平表达的变化.结果:①处理组内p53、c-myc基因表达率明显高于对照组(P<0.001),bcl-2表达显著减弱(P<0.05),p53或c-myc与bcl-2基因表达呈显著性负相关(P<0.05).②处理组内p53在mRNA水平表达量明显高于对照组(P<0.05),p53基因在蛋白水平与mRNA水平表达呈显著性正相关(P<0.05),p53基因在蛋白水平与mRNA水平表达呈显著性正相关(P<0.05).结论:p53、c-myc和bcl-2基因在X线诱导的细胞损伤中起着重要的作用.本研究结果为脑胶质瘤的放射治疗和基因治疗提供了一条新线索.
简介:OBJECTIVE:ToevaluatetheassociationofX-raycross-complementinggroup1(XRCC1)Arg399Gln,Arg194TrpandArg280Hispolymorphismswiththeriskofglioma.DATASOURCES:AsystematicliteraturesearchofpaperspublishedfromJanuary2000toAugust2012inPubMed,Embase,ChinaNationalKnowledgeInfrastructuredatabase,andWanfangdatabasewasperformed.Thekeywordsusedwere"glioma","polymorphism",and"XRCC1orX-rayrepaircross-complementinggroup1".Referencescitedintheretrievedarticleswerescreenedmanuallytoidentifyadditionaleligiblestudies.STUDYSELECTION:Studieswereidentifiedaccordingtothefollowinginclusioncriteria:case-controldesignwasbasedonunrelatedindividuals;andgenotypefrequencywasavailabletoestimateanoddsratio(OR)and95%confidenceinterval(CI).Meta-analysiswasperformedfortheselectedstudiesafterstrictscreening.Dominantandrecessivegeneticmodelswereusedandtherelationshipbetweenhomozygousmutantgenotypefrequenciesandmutantgenefrequencyandgliomaincidencewasinvestigated.WechosethefixedorrandomeffectmodelaccordingtotheheterogeneitytocalculateORand95%CI,andsensitivityanalyseswereconducted.PublicationbiaswasexaminedusingtheinvertedfunnelplotandtheEgger’stestusingStata12.0software.MAINOUTCOMEMEASURES:AssociationofXRCC1Arg399Gln,Arg194Trp,andArg280Hispolymorphismswiththeriskofglioma,andsubgroupanalyseswereperformedaccordingtodifferentethnicitiesofthesubjects.RESULTS:Twelvearticleswereincludedinthemeta-analysis.ElevenofthearticleswereconcernedwiththeArg399Glnpolymorphismandgliomaonsetrisk.Significantlyincreasedgliomariskswerefoundonlyinthedominantmodel(Gln/Gln+Gln/ArgversusArg/Arg:OR=1.26,95%CI=1.03-1.54,P=0.02).Inthesubgroupanalysisbyethnicity,significantlyincreasedriskwasfoundinAsiansubjectsintherecessive(OR=1.46,95%CI=1.04-2.45,P=0.03)anddominantmodels(OR=1.40,95%CI=1.10-1.78,P=0.007),andhomozygotecontrast(OR=1.69,95%CI=1.17-2.45,P=0.005),bu
简介:目的探讨脊髓挫伤部位的X线照射治疗对脊髓损伤后运动功能恢复的作用.方法将70只雌性Wistar大鼠按照纽约大学的重力冲击方法建立大鼠脊髓(T10)损伤动物模型,按照随机数字表法分为7组,每组10只,其中6组大鼠在损伤后不同时间(损伤后20min、1d、2d、4d、7d、17d)对挫伤部位进行X线(20Gy)照射,第7组则不予照射(对照组).然后根据Basso、Beattie、Bresnahan(BBB)评分标准评测各组大鼠运动功能恢复情况,并进行统计学比较.采用快蓝染色对存活6周以上的大鼠进行挫伤脊髓的组织形态学观察.结果脊髓挫伤后20min、1d、2d行X线照射组BBB评分明显高于对照组,差异均有统计学意义(P〈0.05),且在脊髓损伤后的2~3周进展较快,后期恢复缓慢.组织形态学观察可见应用X线治疗组周边组织残存区面积大于对照组.结论脊髓挫伤部位伤后早期行X线照射治疗可保护脊髓残存的神经组织,改善运动功能的恢复.
简介:目的探讨双侧电刺激治疗对脑卒中后神经功能康复的影响。方法150例急性脑卒中偏瘫患者随机分为两组。两组均采用常规药物和功能锻炼治疗,双侧治疗组加用双侧电刺激治疗,对照组加用单侧电刺激治疗。疗程1个月。采用临床神经功能缺损程度评分、简式Fugl-meyer运动功能评分(FMA)、改良Barthel指数(MBI),于初期(治疗前)、末期(治疗后3个月)对两组患者进行评定神经功能。结果治疗后,双侧治疗组临床神经功能缺损程度评分明显减少(P〈0.01);FMA、MBI明显提高(P〈0.01)。结论双侧电刺激治疗可明显促进患肢运动功能康复,降低致残率,提高日常生活能力。
简介:目的探讨应用冠切双额大骨瓣减压术对重型双侧额颞叶脑挫裂伤及早期颅骨修补的效果。方法回顾性分析冠切双额大骨瓣开颅手术治疗的56例重型双侧额颞叶脑挫裂伤伴难治性高颅内压患者的临床资料。术后随访6个月,以格拉斯哥预后量表(COS)评分判定患者的疗效。结果本组患者恢复良好33例,轻残12例,重残5例,植物生存3例,死亡3例。恢复良好的患者中早期行自体或塑形钛网颅骨修补术28例。结论双额冠状切口大骨瓣减压术能有效解除或减轻双额颞叶脑挫裂伤患者的颅内高压,在重型双侧额颞叶脑挫裂伤的抢救中是一种有效的方法,能明显提高抢救成功率,降低致残率和病死率,改善患者的预后。
简介:目的探讨双侧标准外伤大骨瓣与双额冠状骨瓣在重型颅脑损伤开颅去骨瓣减压术中的应用价值。方法2014年3月至2016年3月收治重型颅脑损伤86例,按手术方法分为观察组与对照组,每组43例。观察组行双侧标准外伤大骨瓣开颅减压术,对照组行双额冠状骨瓣开颅减压术。结果术后3个月,观察组恢复良好33例,中残2例,重残3例,植物生存3例,死亡2例;对照组恢复良好22例,中残9例,重残4例,植物生存4例,死亡4例。观察组恢复良好率(76.74%)明显高于对照组(51.26%;P<0.05)。两组术前颅内压无统计学差异(P>0.05),术后1、3、7d颅内压较术前均明显降低(P<0.05),且观察组均明显低于对照组(P<0.05)。观察组术后发生切口疝1例、颅内感染3例、急性脑膨出2例、脑积水2例、脑脊液漏2例;对照组术后发生切口疝4例、颅内感染4例、急性脑膨出3例、脑积水4例、脑脊液漏8例。观察组并发症总发生率(23.26%)明显低于对照组(53.49%;P<0.05)。结论双侧标准大骨瓣开颅去骨瓣减压术可有效使重型颅脑损伤患者脑组织充分减压,疗效好,并发症少。