体外原代培养纯化新生鼠嗅鞘细胞的实验方法_差速贴壁_阿糖胞苷_胰酶法

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CRTERP.O.Box1200,Shenyang110004kf23385083@sina.comwww.zglckf.com武汉理工大学生物材料与工程研究中心,湖北省武汉市430070殷义霞★,女,1979年生,湖北省天门市人,汉族,武汉理工大学在读硕士,主要从事生物医学工程方面的研究。

yinyx71@126.com通讯作者:李世普,教授,武汉理工大学生物材料与工程研究中心,湖北省武汉市430070lishipu46@126.com国家重点基础研究发展计划资助(2005CB623905)*中图分类号:R329.2文献标识码:B文章编号:1673-8225(2007)07-01284-03收稿日期:2006-08-28修回日期:2006-12-02(06-50-8-6442/ZS・X)体外原代培养纯化新生鼠嗅鞘细胞的实验方法:差速贴壁+阿糖胞苷+胰酶法*★殷义霞,李世普,闫玉华,袁琳,王欣宇PrimarycultureandpurificationofneonatalratolfactoryensheasingcellsinvitrowithNash’smethod,cytarabineandtrypsinizationAbstractAIM:Tosetupaneconomicandusefulmethodtocultureandpurifytheolfactoryensheathingcells(OECs)ofneonatalratsinvitrothroughobservationandidentificationofmorphologicalfeatures.METHODS:TheexperimentwasconductedinWuhanUniversityofTechnologyonJune2006.①Materials:Cytarabine(Sigmawiththebatchnumberofw10562),fetalbovineserum(producedbyHangzhouSijiqing),trypsin(Ameresco),polylysine(Sigma),glialfibrillaryacidicprotein(GFAP),andneuralgrowthfactorofproteinreceptors(NGFR-p75).②FiveWisterratsof3daysoldwereselectedandexecutedafterbeingdippedintograinalcoholtoobtaintwoouterlayersfromtheolfactorybulbs,whichwerethendigestedinto1.25g/LtrypsinizationsolutiontoseparatetheOECsforprimarycultureinvitro.③CellswerepurifiedwiththemethodofNash'sdifferentialattachment,cytarabineandtrypsinization.Eighteenhourslater,thesuspendingliquidofnon-attachmentcellswasdivertedtoanotherculturevesselsandculturedfor36hours.Thenallofattachmentcellsweredivertedto0.1g/Lpolylysinesolutionandculturedfor2days.Afterculturedfor48hoursinthe2mg/Lcytarabinesolution,andthecellswereupdatedwithfreshculturemedium.After1day,thecellswerecleanedtwicewiththeHankssolution,andthendigestedfor10minuteswith1.25g/Ltrypsinizationsolution;Purefetalbovineserumwiththeconcentrationof20%wasaddedimmediatelywhilethecellprocesscondensedandthecellbodyturnedintoround,soastoprepareforsinglecellsuspendingliquid.④Thehematoxylinandeosinstaining,immunohistochemicalstainingofneuralgrowthfactorofproteinreceptorsandglialfibrillaryacidicproteinwereperformedrespectivelytoobserveandidentifythemorphologicalfeaturesofOECsundertheelectroninversionmicroscope.AndtheproportionofmasculinerateofOECswascalculated.RESULTS:①ObservationonmorphologyofliveOECs:CulturedOECsappearedwithbipolarormultipolarslenderandinterlacingprocesses,whichwereslimandinterlacedwitheachother.②TheidentificationofOECsstainedbyHE:Cellswereintriangleandfusiformwithlongprocess,redcytoplasm,andbluekaryons.Therewere1-3blue-blacknucleoliinthekaryons.③TheidentificationofOECsstainedbyGFAPimmunocytochemistry:Cellswithbipolarormultipolarslenderandinterlacingprocesseswerebrownandthenucleoluseswerehazel.Thepositiveratewas91.5%.④TheidentificationofOECsstainedbyP75immunocytochemistry:Mostcellswerepositiveandappearedgreen.Thepositiveratewas89%.CONCLUSION:ThemethodofculturingOECswithNash'sdifferentialattachment,cytarabineandtrypsinizationisavailableandprovideseedcellsforthestudyofnerveguidingrecoverymaterials.YinYX,LiSP,YanYH,YuanL,WangXY.PrimarycultureandpurificationofneonatalratolfactoryensheasingcellsinvitrowithNash'smethod,cytarabineandtrypsinization.ZhongguoZuzhiGongchengYanjiuyuLinchuangKangfu2007;11(7):1284-1286(China)[www.zglckf.com/zglckf/ejournal/upfiles/07-7/7k-1284(ps).pdf]摘要目的:通过细胞形态学观察及生物学特性鉴定,建立一种经济实用的体外原代培养纯化新生鼠嗅鞘细胞的实验方法。

方法:实验于2006-06在武汉理工大学完成。

①阿糖胞苷(Sigma,批号w10562);胎牛血清(杭州四季青产品);胰蛋白酶(Amresco);多聚赖氨酸(Sigma);胶质纤维酸性蛋白,神经生长因子受体蛋白抗体(博士德)。

②选取出生3d内的Wistar大鼠5只,乙醇浸泡后断头处死,取嗅球的最外两层,通过1.25g/L胰蛋白酶消化分离嗅鞘细胞,体外原代培养。

③采用Nash差速贴壁+阿糖胞苷+胰酶法纯化嗅鞘细胞。

培养18h后将未贴壁的细胞悬液转种于另一未涂层的器皿中,再培养36h,重复上述步骤移入0.1g/L多聚赖氨酸包被的塑料培养瓶中进行培养,纯化后的细胞在24h内陆续贴壁,常规培养2d,加入终浓度为2mg/L的阿糖胞苷,作用48h后,换上新的培养基,继续培养1d,弃去培养基,用无钙镁的Hanks液清洗2次,然后用1.25g/L的胰酶消化10min,待细胞突起回缩、胞体变圆时,立刻加入纯血清终止,其血清终浓度为20%,制备单细胞悬液。

④倒置显微镜下观察其形态变化,苏木精-伊红染色,同时行神经生长因子受体蛋白和胶质纤维酸性蛋白免疫组化染色鉴定嗅鞘细胞,并计算嗅鞘细胞阳性百分率。

结果:①活细胞形态观察:分离培养的嗅鞘细胞具有双极或多极突起,且突起细长,相互交织。

②嗅鞘细胞的苏木精-伊红染色鉴定:细胞呈三角形或梭形,有长的突起,胞浆被染成粉红色,胞核呈蓝紫色,胞核内深染的为核仁,有1~3个核仁。

③嗅鞘细胞的胶质纤维酸性蛋白免疫组化染色鉴定:细胞呈现棕黄色,胞核淡染,阳性细胞成网状连接,胞体多为三角形,有细长突起,阳性率91.5%。

④嗅鞘细胞的P75免疫组化染色鉴定:阳性细胞呈绿色,多数细胞染色阳性,阳性率89%。

结论:实验所采用的Nash差速贴壁+阿糖胞苷+胰酶法分离纯化培养嗅鞘细胞切实可行,为神经诱导修复材料的研究提供种子细胞。

关键词:细胞培养技术/方法;嗅球/细胞学;免疫组织化学殷义霞,李世普,闫玉华,袁琳,王欣宇.体外原代培养纯化新生鼠嗅鞘细胞的实验方法:差速贴壁+阿糖胞苷+胰酶法[J].中国组织工程研究与临床康复,2007,11(7):1284-1286[www.zglckf.com/zglckf/ejournal/upfiles/07-7/7k-1284(ps).pdf]基础医学BiomedicalEngineeringCenter,WuhanUniversityofTechnology,Wuhan430070,HubeiProvince,ChinaYinYi-xia★,Studyingformaster'sdegree,BiomedicalEngineeringCenter,WuhanUniversityofTechnology,Wuhan430070,HubeiProvince,Chinayinyx71@126.comCorrespondenceto:LiShi-pu,Professor,BiomedicalEngineeringCenter,WuhanUniversityofTechnology,Wuhan430070,HubeiProvince,Chinalishipu46@126.comSupportedby:theNationalKeyBasicResearchProgramFoundedbytheMinistryofScienceandTechnology,No.2005CB623905*Received:2006-08-28Accepted:2006-12-02中国组织工程研究与临床康复第11卷第7期2007-02-18出版JournalofClinicalRehabilitativeTissueEngineeringResearchFebruary18,2007Vol.11,No.71284CRTER沈阳1200邮政信箱110004kf23385083@sina.comwww.zglckf.comwww.zglckf.com殷义霞,等.体外原代培养纯化新生鼠嗅鞘细胞的实验方法:差速贴壁+阿糖胞苷+胰酶法ISSN1673-8225CN21-1539/Rkf23385083@sina.com0引言嗅鞘细胞具有独特的促进中枢神经轴突再生的能力,在脊髓损伤领域已有众多的研究和报道[1-3]。