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1、不同濃度rhEPO對神經(jīng)干細胞體外培養(yǎng)增殖的影響作者:胡萌,呂剛,梅晰凡,張世民【摘要】目的觀察不同濃度rhEPO對神經(jīng)干細胞體外培養(yǎng)增殖的影響,探討rhEPO聯(lián)合神經(jīng)干細胞移植治療脊髓損傷修復(fù)的影響。方法用不同濃度(5、50、500U/mL)rhEPO干預(yù)從新生SD大鼠(出生24h以內(nèi))取材來的神經(jīng)干細胞,分別檢測每組神經(jīng)干細胞克隆形成率;在不同時間分別用MTT法檢測細胞增殖率;神經(jīng)干細胞分化的免疫細胞化學(xué)染色及計數(shù)。結(jié)果添加rhEPO各實驗組細胞增殖較快最終神經(jīng)球的數(shù)量多于對照組,以50U/mLrhEPO組作用顯著;添加rhEP
2、O各實驗組的細胞生長曲線均高于對照組,尤其是50U/mLrhEPO組顯著高于對照組;NSE和GFAP免疫細胞化學(xué)染色和計數(shù)結(jié)果顯示,50U/mLrhEPO組中NSE免疫陽性細胞明顯多于對照組(P<0.01)。結(jié)論rhEPO對神經(jīng)干細胞體外培養(yǎng)增殖有促進作用,尤以適中濃度(50U/mL)作用更加明顯?!娟P(guān)鍵詞】神經(jīng)干細胞;rhEPO;體外培養(yǎng);增殖Abstract:ObjectiveToobservetheeffectwhichmultipliesinvitroraisetothenervestemcellofdifferent
3、densityrhEPO,andtodiscusstheinfluenceofrhEPO,associatedwithnervestemcelltransplant,incuringspinalcorddamagerepair.Methods11Thepresentresearchfirstlyintervenedthenervestemcell,obtainedfromthenewbornSDbigmouse(bornwithin24hs),withdifferentdensityrhEPO(5,50,500U/mL).Then,
4、adistinctiveexaminationoftherateofcloneformationineachgroupsnervestemcellswasconducted.Afterwards,MTTmethodwasusedtoexaminethecellreproducibilityindifferenttimesandnervestemcelldifferentiationsimmunocytochemistrydyeingandcounting.ResultsThecellmultiplicationinexperim
5、entalgroupswhichhadaddedtheEPOwasquickerandthequantityoffinalnerveballswaslargerthanthatinthecontrolgroup,whichwasremarkablein50U/mLEPOgroup.ThecellgrowthcurveinexperimentalgroupswhichhadaddedtherhEPOwashigherthanthatinthecontrolgroup,whichwasalsoremarkablein50U/mLEPOg
6、roup.TheNSEandGFAPimmunocytochemistrydyeingandthecountingresultsshowedthattheNSEimmunitymasculinecellsinthe50U/mLEPOgroupwereobviouslymorethanthatinthecontrolgroup(P<0.01).ConclusionsrhEPOhasthepositiveeffectonthenervestemcellinvitroraisemultiplication,whichismoreob
7、viouswiththemoderatedensity(50U/mL). Keywords:nervestemcell;rhEPO;invitroraise;multiplication11 神經(jīng)干細胞(nervestemcell,NSCs)是一種具有復(fù)制能力和多向分化潛能的原始細胞,在中樞神經(jīng)系統(tǒng)損傷的修復(fù)研究中逐漸引起醫(yī)學(xué)界的關(guān)注。近年來的研究發(fā)現(xiàn),神經(jīng)干細胞不僅存在于胚胎腦組織,而且已發(fā)育成熟的內(nèi)也存在神經(jīng)干細胞[1]。正常情況下這些NSCs處于“靜止”或“休眠”狀態(tài),在特定因素的作用下,例如損傷或刺激,其分裂、分化的潛能
8、就被激活,從而出現(xiàn)增殖現(xiàn)象。堿性成纖維細胞生長因子(basicfibroblastgrowthfactor,bFGF)對離體神經(jīng)干細胞具有一定的增殖效應(yīng),但其作用有限[2]。因此,如何更有效的促進NSCs的增殖是推動其在治療過程中的重