简介:这研究试图评估结果并且描述了cryopreservedlimbal的恢复过程为角膜的外设和limbal疾病的薄片状的keratoplasty(CLLK)。有一个平均数的12个病人的13只眼睛41变老
简介:Thedamageofhumancornealcellsencounterwiththeproblemofavailabilityofcornealcellsforreplacement.Limitationofthesourceofcornealcellshasbeenrealized.Anattemptofdevelopmentofcornealepithelial-likecellsfromthehumanskin-derivedprecursor(hSKPs)hasbeenmadeinthisstudy.Combinationofthreeessentialgrowthfactors:epidermalgrowthfactor(EGF),keratinocytegrowthfactor(KGF)andhepatocytegrowthfactor(HGF)coulddemonstratesuccessfullyinductionofhSKPstodifferentiationintocornealcells.Theinducedcellsexpressedtheappearanceofmarkersofcornealepithelialcellsasshownbythepresenceofkeratin3(K3)byantibodylabelandWesternblotassay.TheK3geneexpressionofinducedhSKPscellsasshownbyreversetranscription-polymerasechainreaction(RT-PCR)technologywasalsodemonstrated.ThepresenceofthesemarkersatbothgeneandproteinlevelscouldleadtoourconclusionthatthedirectionaltransdifferentiationofhSKPscellsintocornealepithelialcellswassuccessfullydoneunderthiscellinductionprotocol.Thefindingshowsanewlyavailablestemcellsourcecanbeobtainedfromeasilyavailableskin.Cellsfromautologoushumanskinmightbeusedforcornealdisordertreatmentinfutureclinicalapplication.
简介:AIM:Todemonstratethemorphologyandstructureofinvitroreconstructedtissue-engineeredhumancornealepithelium(TE-HCEP)withseedercellsfromanuntransfectedHCEPcellline.·METHODS:TheTE-HCEPswerereconstructedinvitrowithseedercellsfromanuntransfectedHCEPcellline,andscaffoldcarriersofdenudedamnioticmembrane(dAM)inair-liquidinterfaceculturefor3,5,7and9days,respectively.Thespecimenswereexaminedwithhematoxylin-eosin(HE)stainingofparaffin-section,immunocytochemicalstaining,scanningandtransmissionelectronmicroscopy.·RESULTS:DuringinvitroreconstructionofTE-HCEP,HCEPcellsformeda3-4,6-7and8-10layersofanHCEP-likestructureondAMsinair-liquidinterfaceculturefor3,5and7days,respectively.Butthecellsdeceasedto5-6layersandthestructureofstraifiedepitheliumbecamelooseatday9.Andthecellsmaintainedpositiveexpressionofmarkerproteins(keratin3andkeratin12),cell-junctionproteins(zonulaoccludens-1,E-cadherin,connexin43andintegrinβ1)andmembranetransportproteinofNa+-K+ATPase.TheHCEPcellsinTE-HCEPwererichinmicrovillionapicalsurfaceandestablishednumerouscell-cellandcell-dAMjunctionsatday5.·CONCLUSION:ThemorphologyandstructureofthereconstructedTE-HCEPweresimilartothoseofHCEPinvivo.TheHCEPcellsinthereconstructedTE-HCEPmaintainedthepropertiesofHCEPcells,includingabilitiesofformingintercellularandcell-extracellularmatrixjunctionsandabilitiesofperformingmembranetransportation.TheuntransfectedHCEPcellsanddAMscouldpromisinglybeusedinreconstructionHCEPequivalentforclinicalcornealepitheliumtransplantation.
简介:·AIM:Toinvestigatechangesinimmunogenicityofcryopreservedlimbalstemcells.·METHODS:Cryopreservedlimbalstemcells,freshprimarylimbalstemcellsandblankcontrolswereinoculatedsubcutaneouslyinC57BL-6miceandthepercentageofCD25cellsinlimbalexplantswasdeterminedbyflowcytometryatday21postinoculation.Morphologicalstudieswereperformedbylightandelectronmicroscopyoflimbalexplantsections.·RESULTS:Thenumberofregionalandsystemiclymphocytesderivedfromcryopreservedlimbalstemcellswaslowerthanthatfromfreshprimarylimbalstemcells.·CONCLUSION:Lymphocytesderivedfromcryopreservedlimbalstemcellsshowedchangesinimmunogenicity,butthesignificanceisunknown.Thecryopreservationandthawingmethodsawaitfurtherstudy.·
简介:Theresearchgroupwasinterestedinthetherapeuticpotentialoflimbalfibroblasts,whicharepre-sentinthecorneallimbus.Recently,inmuchstemcellresearch,researchersandadvocatesarestress-ingtheimportanceofutilizingcellsfromthenichewhichtheywilltarget.Thismeans,thatadiposetissueandbonemarrowderivedstemcells,arelikelynotappropriateandevendangeroustoapplyu-biquitouslyastherapiestootherpartsofthebodyincertaincases.Severalresearchgroupsandclini-caltrialshaveshownthistobethecase,includingcasesofblindness,braininflammation,anddeathasadverseevents.
简介:我第一次参加《红房间、白房间、黑房间》剧组活动,说心里话能参加这个戏的工作,尤其是演宁恒这样一个角色.激动当中又对自己产生怀疑。