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时间:2020-05-20
《超顺磁性壳聚糖质粒明胶控释微球促进人工骨内新生血管的实验研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、主尘型垄查兰兰生月第35卷第5期ChinJPediatrSurg,May2014,voL35,No.5323·临床基础研究专题·超顺磁性壳聚糖质粒明胶控释微球促进人工骨内新生血管的实验研究惠慧罗聪安洪蒋电明李明李延玉张鑫岑超德何大维魏光辉何通川【摘要】目的提出并利用人工骨支架内部的磁性微动、营养物质交换原理,解决大段骨缺损人工骨内部血管化的问题。方法取48只成年新西兰兔按数字随机表法随机分成4组,手术制成96侧桡骨骨缺损模型。A组:超顺磁性壳聚糖质粒明胶微球(SPCPGM+静磁场+振荡磁场);B组:超顺磁性壳聚糖质粒明胶微球(SPCPGM+静磁场);C组:超顺磁性壳聚糖质粒明胶微球(
2、SPCPGM);D组:对照组,壳聚糖质粒明胶微球(CPGM);通过大体观察、墨汁灌注、HE染色、免疫组化等评价其血管化效果。结果纳米Fe34微粒呈球形,外形规则且表面光滑,粒径主要分布于50nnl左右,当氮磷比(N/P)达1:0.6时,SPFCN能与质粒完全结合;A组新生组织出现最早,4~6周即形成成熟的血管网,且数量明显多于其他处理组,同时期残留的微球少于其他组;B组成血管过程与A组相似,成血管的时间迟于A组约两周左右;C、D组成血管时间晚于B组,同时期残留未降解的微球相对较多。结论F岛04微粒为超顺磁性纳米粒,且能够有效地与质粒结合;超顺磁性质粒(pDsVEGF165Redl—N
3、1)壳聚糖明胶微球具有促进生物活性人工骨成血管的作用;静磁场和振动磁场联合应用,能够明显提高超顺磁性质粒壳聚糖明胶微球局部成血管作用;振荡磁场能够有效地减少局部磁性微球的残留。【关键词】人工骨;转染;明胶;微球体Superparanmg~ticehitosanplasmidsgelatincontrolledreleasemicrospherespromotevascularizationinartificialboneHuiHui,LuoCong,AnHong,JiangDianming,LMing,LiTingyu,ZhangXin,CenChaode,HeDazoei,WeiG
4、uanghui,HeTongchuan.StemcellBiology&Therapylabo—ratory,MinistryofEducationKeyLaboratory0,CDevelopment&Disorders,KeyLaboratoryofPediatricsinChongqing,C7zongqingInternationalScience&TechnologyCooperationCenter_厂0rCDevelopment&Disorders,ChildrerfsHospitalofChongqingMedicalUniversity,Chongqing40001
5、4,ChinaCorrespondingauthor:LuoCong,E_7nZ:luocong919@sohU.CO?Ft[Abstract]ObjectiveToresolvetheproblemofvascularizationinartificia1boneforlongbonedefectinaccordancewiththetheoriesofmagneticmicro-movementandnutrientexchange.MethodsAtotalof48adultNewZealandwhiterabbitswererandomlydividedinto4groups
6、ofA:SPCPGM+staticmagneticfieldoscillatingmagnetiCfield,B:SPCPGMstaticmagneticfield,C:SPCPGMandD:CPGⅣLThebonedefectsinbilatera1radiiweresubstitutedwithcylinderporositycagescontainingdifferentmicrospheres.Thenthebonedefectspecimenswereobtainedatweeks2,4and6post-operation.Generalobservationsandhis
7、tologicalexaminationswereperformedtoevaluatethefeasibilityofrepairingbonedefectsindifferentgroups.ResultsChitosanF白04nanosphereshadcomplete。smoothandroundorovalshape.ThediameterofFe304nanospherewasaround50am.Andthecompletebindingo
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