简介:摘要目的对不同分期宫颈癌术前B超测量宫颈大小值情况进行探讨。方法选取2010年12月—2012年12月在本院进行宫颈癌手术患者202例,所有患者在手术前均接受B超检查,回顾性比较分析不同分期宫颈癌患者的宫颈肿物大小值情况。结果经手术后经病理分期,本组患者宫颈癌0期27例,平均宫颈最大径线(2.54±0.22)cm;Ⅰ期42例,平均宫颈最大径线(3.21±0.32)cm;Ⅱb期102例,平均宫颈最大径线(3.98±0.36)cm;Ⅱa期31例,平均宫颈最大径线(4.23±0.43)cm,不同分期宫颈癌患者平均宫颈最大径线均有显著性差异,P<0.05。结论术前B超测量宫颈大小值对于宫颈癌分期具有一定指导意义,是治疗方案选择、预后评估的重要参考依据,值得临床推广应用。
简介:Objective:Fusogenicendogenousretroviralsyncytinplaysanimportantroleintheformationofsyncytiotrophoblastsinhumanplacenta.Apartfromitsexpressioninplacenta,brainandtestis,syncytinhasalsobeenfoundinmanycancers.Althoughsyncytinhasbeenproposedtoserveasapositiveprognosticmarkerinsomecancers,theunderlyingmechanismisunclear.Theaimofthisstudyistoevaluatetheeffectsofsyncytinexpressionontheinvasivephenotypeofmelanomacells.Methods:Theeukaryoticexpressionplasmidforsyncytin-EGFPwasconstructedandtransfectedintoB16F10melanomacells.TheeffectofsyncytinontheinvasionpotentialoftumorcellswasevaluatedinB16F10sublinecellsthatstablyexpressedsyncytin-EGFPfusionproteinorEGFPalone.Results:TheB16F10sublinesthatstablyexpressedsyncytin-EGFPorEGFPalonewereestablishedrespectivelyandconfirmedbyimmunofluorescentandimmunoblottingassay.SyncytinexpressioninB16F10cellswasassociatedwithdecreasedcellproliferation,migrationandinvasion.Multinucleatedgiantcellsthatcontainedasmanyasfivenucleiwereinducedinsyncytin-expressingcells.Inaddition,syncytinexpressiondidnotalterthesensitivityofB16F10cellstotrichosanthin,atoxinthatdamagessyncytiotrophoblastsmoreefficientlythanothertissues.Conclusions:Theseresultssuggestthatsyncytinexpressioninsomecancersmayconfinetheirinvasionpotentialandthusserveasapositiveprognosticfactor.更多还原
简介:目的对从广州市报告的两例B群流行性脑脊髓膜炎(流脑)病例中分离的4株脑膜炎奈瑟菌(Neisseriameningitidis,Nm)进行多位点序列分型(multi—locussequencetyping,MLST)研究。方法分纯并提取菌株DNA、运用MI。ST分析对7个管家基因进行扩增并测序,确定菌株的序列型,对其相关性进行分析。结果两例病例分离株7个管家基因位点序列均不相同,第一例病例分离株的序列型为ST-7型,属高致病性ST-5complex/subgroupIII克隆系;第二例病例分离株的序列型为新发现的ST一9804型。结论广州两例B群流脑病例虽然发生时间相近,但分属不同的序列型,无同源性。MLST分型技术对研究不同流脑病例间的流行病学关系有重要意义。
简介:Lamellarcrystalsofdiblock,triblockandfour-armpoly(ethyleneglycol)-b-poly(ε-caprolactone)(PEG-b-PCL)crystalline-crystallinecopolymersweresuccessfullyobtainedfromtheirsolution.Morphologyandstructureoflamellarcrystalsofcrystalline-crystallinecopolymerswereinvestigatedusingtapping-modeatomicforcemicroscopy(AFM)andselectedareaelectrondiffraction(SAED).Allofthesesamplesshowedthetruncated-lozengemultilayerbasalshapeswithcentralscrewdislocationorcentralstack,whichwereallobtainedsimultaneouslyfromtheoilbath.ThediffractionpatternofPEGblocklamellarcrystalisattributedtothe(120)diffractingplanesandthepatternofPCLblocklamellarcrystalisattributedtothe(110)diffractingplanesand(200)diffractingplanesaccordingtotheSAEDresults.Four(110)crystalgrowthplanesandtwo(200)crystalgrowthplanesarediscoveredforthePCLblocks,butthe(120)crystalgrowthplanesofPEGblocksarehidedinthefigureofAFM.Thecrystallinestructureofthefour-armcopolymers(FA)ismoredisorderandconfusedthanthatofthediblock(DI)copolymerandthestriatedfoldsurfacestructuresoflamellarcrystalsoffour-armcopolymers(FA)aresmootherthantheseoflinearanalogues,owingtotheconfusedcrystallizationofblockscausedbythemutualrestrictionofblocksandthehindranceofthedendriticcores.Inaddition,theaspectratioofFAisgreaterthanthatoftheothers.Itishypothesizedthattherearetworeasonsforthechangeofaspectratios.First,the(200)diffractingplanesofPCLcrystalsgrewslowlycomparedtotheir(110)diffractingplanesbecauseofdifferenceintheenergybarrier.Secondly,edgedislocationsonthe(200)diffractingplanesarealsoresponsibleforthevariationoftheaspectratio.Consequently,thecrystallinedefectsareaugmentedbythecompetingblockscrystallizedsimultaneouslyandthehindranceofthedendriticcores.
简介:目的探讨大剂量高压氧治疗方案对永久陆大脑中动脉闭塞大鼠的疗效以及高压氧对大鼠梗死部位周围脑组织核因子κB(nuclearfactor-κB,NF-κB)影响。方法制备雄性Sprague--Dawley大鼠永久陛大脑中动脉闭塞模型,随机分为高压氧组和对照组,每组32X,另设立伪手术组。使用Garcia神经行为学评分方法分别在术后24h、5d对大鼠进行神经行为学评分;应用2,3,5一三苯基氯化四氮唑(2,5,5-trjphenyltetrazolfumchlorid,TTC)方法对脑组织进行染色,观察24h、5d时大鼠脑组织梗死容积;取梗死部位周围脑组织,采用凝胶电泳迁移实验(electrophoreticmobilityshiftassay,EMSA)方法检测术后24h、5d时的NF-κB脱氧核糖核酸(deoxyribonucleicacid,DNA)结合活性。比较三组间上述指标的差异。结果术后24h高压氧组神经行为学评分高于对照组[(13.33±1.53)坩(10.33±0.58),P〈0.001]。术后24h高压氧组梗死容积小于对照组[(139.75±33.59)坩(203.02±57.66),P=0.008]。术后5d高压氧组梗死部位周围脑组织NF-κB活性低于对照组[(16.01±4.56)坩(50.28±9.15),P=0.035]。结论大剂量高压氧治疗方案在脑梗死后24h内具有脑保护作用。大剂量高压氧可降低大鼠梗死部位周围脑组织NF-κBDNA结合活性。
简介:摘要目的探究与分析B超监视妇产科手术仪在剖宫产后瘢痕部位妊娠诊治中的应用。方法选取我院妇产科收治的剖宫瘢痕部位在妊娠的50例患者将其作为研究对象(经本人同意),在b超监视下对其进行手术,并与我院在未使用b超监视妇科手术仪时所做出的诊断和治疗作对比,在诊断和治疗经验方面做出总结。结果运用b超监视妇产科手术仪进行的手术全部成功,且疗效显著,切无一例失败。P<0.05,具有统计学意义。运用b超监视妇科手术仪进行的剖宫产比未使用b超监视的手术产生的副作用少,P<0.05,具有统计学意义。结论在剖宫后瘢痕部位妊娠的诊短中全部成功,并且手术成功,因此在临床上具有一定的指导意义。