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诱导多能干细胞原代心肌细胞的融合细胞表现出双向重建.pdf


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) 33Å) 22Ÿ ) É Ê # % & & Ë Vol.33,No.22
           t4)mouseandcardiacmyocytesfromneonatal
mouse.Morphologicalchangesofthefusioncellswereobserveddynamicallyafteralkalinephosphatase(AKP)
staining.Specificproteinsofstemcellsandcardiacmyocytesinfusioncellsweredetectedbyimmunofluores
cence.Chromosomekaryotypeanalysiswereperformedtodeterminewhethertheoccurrenceofnuclearfusion
anddegreeofintegration.Results Fusioncellswereconstructedsuccessfullybypolyethyleneglycolmedia
tion.Colonylikecellclustersappearedin4dafterfusion.TheAKPpositiverateofiPScwere0.935±0.039,
0.939±0.022,0.954±0.017,and0.944±0.027atthe2nd,3rd,4thand5thdaysrespectively,andthat
offusioncellswere0.761±0.044,0.740±0.023,0.681±0.034,and0.748±0.045atthecorresponding
daysrespectively.Atthesametimepoints,thereweresignificantdifferencesbetweeniPScAKPpositiverates
andthoseoffusioncells(P<005).Intheinitialstage,fusioncellsmainlydisplayediPSccharacteristics,
withOct4positivewhilecTnTnegative.ThenthefusioncellsbegantodisplaybothcharacteristicsofiPScand
cardiacmyocytesin7dafterfusion,withpositiveexpressionofOct4andcTnT.Morethan80% offusioncells
had76to80chromosomes.Conclusion Fusioncellsfrom diploidiPScanddiploidmyocardialcellsdisplay
thecharacteristicsofthetwoparentalcellsandshowbidirectionalreprogrammi

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  • 时间2022-02-27