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20092521(mesenchymalstemcells,MSCs),[1-4]。MR。、,MR。,,[5-8]。(poly-L-lysine,PLL)(SPIO)MSCs、MSCs,MSCs。11.11.1.1Percoll(Pharmacia,),(PAA,),DMEM(GIBCO,),0.25%(Gibco,),SPIO(Resovist,Schering,),PLL(Sigma,)。1.1.2(),BECKMANCOULTER(BECKMAN,),CO2(Thermo,),(Nikon,)。1.21.2.1MSCs、4SPFSD(),,,,1.077g/mLPercoll,,(DMEM,10%,10ng/mLEGF,),100mm,37℃,5%CO2、。24h:(SPIO)(MSCs)、MSCs。:、MSCs。4MSCs,25μgFe/mLSPIO-(PLL)。MSCs,,MTT,,。:MSCsSPIO-PLL100%,MSCs(18.38±2.80)pg/cell,76。、、。:PLLSPIOMSCs、,MSCs,MSCs。;;;InvitrostudyofratmesenchymalstemcellslabeledwithsuperparmagneticironoxideCHENGuo-dong,LIDan,XUJie-hua,WANGJin,ZHUKang-shun,SHANHong.DepartmentofRadiology,ThirdAffiliatedHospitalofSunYat-senUniversity,Guangzhou510630,ChinaCorrespondingauther:SHANHongE-mail:gzshsums@pub.guangzhou.gd.cn【Abstract】ObjectiveToevaluatethemethodandefficiencyoflabelingMSCswithSPIO-PLL,andevaluatetheeffectofSPIO-PLL-labelingonbiologicalcharacteristicsofMSCs.MethodsMSCscellswereisolatedfrombonemarrowofSDratbydensitygradientcentrifugationandadherentculture.ThefourthgenerationMSCsweretransfectedwith25μgFe/mlSPIO-PLL.CellviabilityandproliferationwereevalutatedbytheexclusionoftrypanbluedyeandMTTassay,respectively.ThemorphologicchangeofMSCswasdynamicallyobservedbyinvertedphasedmicroscope.Ironuptakeviaendocytosiswasidentifiedbyprussianbluestainingandquantifiedbyspectroscopy.ResultsThepercentageofiron-positivecellswas100%after24hincubationwithSPIO-PLL.TheironloadinSPIO-PLL-labelingcellswas(18.38±2.80)pg/cell,whichwas76-foldhigherthanthatinunlabelledcells.Comparedwithunlabelledcells,neithercellviabilitynorproliferationofSPIO-PLL-labellingMSCswereobviouslychanged.ConclusionsLabelingMSCswithSPIO-PLLisconvenientandeffective,withoutaffectingthebiologicalcharacteristicsofMSCs,itshouldbeausefulmethodfortrackingMSCs.【Keywords】Mesenchymalstemcells;Biologicalmarkers;Rats;Labelingsuperparmagneticironoxide:(:30670594,30770328);(:2006B36003013,2008B06060034):510630,:E-mail:gzshsums@pub.guangzhou.gd.cn356620092521,3d,90%,0.25%。1.2.2MSCsSPIOSPIOPLL,60min,SPIO-PLL,(PLL0.75μg/mL,SPIO25μgFe/mL,10%),90%MSCs(100mm),24h,,,60mm,41,、。1.2.3,(0.04%),。,;,。(),=(-)/×100%。1.2.4MTTMSCs,1×103/96,4,。,481。2、7MTT。MTT:,MTT(0.5mg/mL,LG-DMEM)200μL,4h,MMT,150μL(DMSO),10min,(490nm),。1.2.5MSCs,1×105/24,12h,4%30min,(10%10%)1h,30min。、,,700,3。1.2.60.5×105,80℃2h,350μL(3∶1),60℃2h,PBS,。1.3SPSS11.5,±,t,P<0.05。22.1MSCs24h、。48h,,、、,,,、,12d90%。MSCs,,。1,2。2.2MSCsSPIOMSCs4(16d)、。24h、16d(97.2±1.0)%、(96.8±0.8)%(97.7±0.8)%、(98.3±0.7)%,(P>0.05)。2.3MSCsSPIO()2d、7d,MSCs0.023±0.006、0.581±0.047,0.026±0.004、0.562±0.041,(P>0.05),,。2.4MSCsSPIO、,100%(3);(4)。(18.38±2.80)pg/cell,(0.241±0.15)pg/cell,76,。3SPIO,11MSCs(72h,100×)24MSCs(100×)3(400×)4(200×)3421356720092521,,T2,T2T2*,,,MRI。SPIOScheringResovist,4.2nm,Fe3O4Fe2O3,,62nm,T2。SPIO,,、[9]。SPIO,,,、[5-11]。SPIO、、[5-6,10]。SPIO,,SPIO,。,,,。SPIO(transfectagents,TA),SPIO,,,[5,11]。TA、、Dendrimers(),SPIO,PLL[5-6,10]。,SPIO、PLL、、,PLL()SPIO,、、,,20μgFe/mL[5-8]。SPIO(25μgFe/mL)PLL(0.75μg/mL)60minMSCs24h,;MSCs100%,,(18.38±2.80)pg/cell,(0.241±0.15)pg/cell,。,SPIO-PLLMSCs,SPIOPLLMSCs。、,、、。,25μgFe/mLPLL-SPIO24h,97%,,16d(4)。SPIO、,、;,。,25μgFe/mLSPIO-PLLMSCs,MSCs、,、,。4YuehuaJ,JahagirdarBN,ReinhardtRL,etal.Pluripotencyofmesenchymalstemcellsderivedfromadultmarrow[J].Nature,2002,418(6893):41-49.BakshD,SongL,TuanRS.Adultmesenchymalstemcells:characterization,differentiation,andapplicationincellandgenetherapy[J].JCellMolMed,2004,8(3):301-316.,,,.[J].,2007,23(12):1863-1865.,,,.[J].,2007,15(84):597-600.ArbabAS,YocumGT,WilsonLB,etal.Comparisonoftransfectionagentsinformingcomplexeswithferumoxides,celllabelingefficiency,andcellularviability[J].MolImaging,2004,3(1):24-32.FrankJA,MillerBR,ArbabAS,etal.Clinicallyapplicablelabelingofmammalianandstemcellsbycombiningsuperparamagneticironoxidesandtransfectionagents[J].Radiology,2003,228(2):480-487.SchaferR,KehlbachR,MullerM,etal.Labelingofhumanmesenchymalstromalcellswithsuperparamagneticironoxideleadstoadecreaseinmigrationcapacityandcolonyformationability[J].Cytotherapy,2009,11(1):68-78.BulteJW,KraitchmanDL,MackayAM,etal.Chondrogenicdifferentiationofmesenchymalstemcellsisinhibitedaftermagneticlabelingofwithferumoxides[J].Blood,2004,104(10):3410-3412.FerrucciJT,StarkDD.Ironoxide-enhancedMRimagingoftheliverandspleen:reviewofthefirst5years[J].AJR,1990,155(5):943-950.FrankJA,AndersonSA,KalsihH,etal.Methodsformagneticallylabelingstemandothercellsfordetectionbyinvivomagneticresonanceimaging[J].Cytotherapy,2004,6(6):621-625.RaynalI,PrigentP,PeyramaureS,etal.Macrophageendocytosisofsuperparamagneticironoxidenanoparticles:mechanismsandcomparisonofferumoxidesandferumoxtran-10[J].InvestRadiol,2004,39(1):56-63.,,.[J].,2007,23(19):3116-3118.(:2009-04-06:)[1][2][3][4][5][6][7][8][9][10][11][12]3568
本文标题:超顺磁性氧化铁标记对大鼠骨髓间充质干细胞生物学特性的影响
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