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1、中國農(nóng)業(yè)科學院碩士學位論文五指山豬近交系EG細胞建系影響因素研究姓名:劉嵐申請學位級別:碩士專業(yè):動物遺傳育種與繁殖指導教師:馮書堂20050601ABSTRACTAtotalof200fetuseswerecollectedfrom18wuZhiShaninbreedingPigs(wzsP)tostudyt1efhctorsinfluenceontheestablishmentofporcineembryonicgerm(EO)ce

2、llslinesThefactorsincludedfeedercells,conditionmedium(CM),growthfactorsanddigestingenzymesMoreoverEGcellsevaluationwascarriedout(I)Porcineembryonicfibroblasts(PEF)wereobtainedfrom26~28dfetusesofWZSPtheycouldbepurifiedbyp

3、assagingPEFwerepassagedtoFlo,itWaSshownthatPEFcouldbeculturedlong—terminvitroandpreservedat——196“CThenormalkaryotypeofPEFwasfoundoutatF5bykaryotypeanalysisf2、T0study也eeffectoffeedercellsonporcineEGcellsculturedinvitro,53

4、fetuseswerecollectedfrom265dpregnantgilts33ofthemwereplatedonSTOfeedercellsand20werecoculturedwimPEFWhenusingthesamemediumporcinePGCderivedcoloniesculturedonSTOfeedercellscouldgrowwellThecoloniescoculturedwithPEFcoulddev

5、elopinF0,buttheydifferentiatedafterpassageSoPEFcouldnotmaintainthegrowthofporcineEGcells,whileSTOfeedercellsCOUIddo(3)Tostudytheeffectofconditionmedium(CM)onporcineEGcellsculturedinvitro,35fetuseswerecollectedfrom265dpre

6、gnantgilts15ofthemwereculturedinBRLCMand20wereincommonmedium(DMEM15%FCS2mmol/mlLglutamineOImmol/mlMEMnonessentialaminoacidsO1mmol/mlBmercaptoethanol1001U/mlPenicillin100pg/mlStreptomycin)TheresultsmanifestedthatbothBRLCM

7、andcommonmediumweresuitableforporcineEGcellsculturingandpassagingwhenhavingSTOfeedercellsSoBRL—CMcanbeusedtocultureporcineEGcells(4)TostudytheeffectofgrowthfactorsonporcineEGcellsculturedinvitro,78fetuseswerecollectedfro

8、m265dpregnantgilts35ofthemwereculturedinmediumsupplementedwithLIFSCFandbFGF(mediumII)and43wereculturedincommonmedium(mediumI)TheresultsshowedthatbothmediumIandmediumIIcouldbeusedculturingandpassagingporcineEGcellswhenhav

9、ingSTOfeedercells,butmedium11wasbetterthanmediumISoporcineEGcellscarlalsobeculturedinmediumwithoutgrowthfactors(5)TostudytheeffectofdigestingenzymesonpassageporcineEGcells,34fetuseswerecollectedfrom265dpregnantgiltsPGCsw

10、fftoisolatedandplmedonSTOfeedercellsOnpassaging,thecoloniesweredigestedbydispaseorO25%trypsinEDTATheresultwasthatrenascentcoloniesofEGcellscouldbeobtainedandpassagedatbothcasesItindicatedthatbothdispaseandO25%trypsin—EDT

11、AcanbeusedtopassageporcineEGcells(6)ThecoloniesofF3~F4EGceilswereidentifiedThemorphologyofporcinePGCderivedcolonieswasmultiplicitycellsweretightlypackedincoloniesandcoloniesedgewasplainThecolonieswereAKPpositive,reactedw

12、ithSSEA1antibodyandtheirimmunityfluorescencestainingofOct4waspositiveThecoloniesplacedinsuspensioncultureinmediumcontainingcalfserumwithoutgrowthfactorsdifferentiatedintosimpleembryoidbodies(EBs)Thesecellshavemanycharact

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