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时间:2019-01-06
《纳米液态氟碳脂质微球超声造影剂的制备及体外聚集实验研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、编号:080290刊用形式:论著纳米液态氟碳脂质微球超声造影剂的制备及体外聚集实验研究陈松基金项目:“863”科技攻关项目(2006AA02Z4F0);国家自然科学基金重点项目(30430230);重庆市自然科学基金面上项目(2005BA5024)作者简介:陈松,男,重庆市人,硕士研究生,主治医师,主要从事超声造影方面的研究。电话:(023)63719612,E-mail:cs20012001@163.com通信作者:王志刚,电话:(023)63719612收稿日期:2008-01-17;修回日期:2008-07-28,康娟,王志刚,李攀,伍星,许川山(重庆医科大学附属第二医院超
2、声影像学研究所,重庆400010)摘要:目的制备一种新型超声造影剂-纳米液态氟碳脂质微球造影剂,并研究其体外基本特性及聚集后增强超声显影性能。方法采用高压均质法制备纳米液态氟碳脂质微球超声造影剂,检测一般理化性质,再制备生物素化微球,以空白微球为对照组,分别在加入亲和素前后,观察体外聚集情况及超声显影效果,并用DFY超声图像定量分析统计软件计算、比较超声图像平均灰度值。结果所制备的液态氟碳脂质微球外观呈乳白色的混悬液,镜下微球形态圆整,大小均一,性质稳定,粒径(171.9±91.0)nm;制备的生物素化微球在加入亲和素后聚集成团状,并可增强超声显影,经DFY软件分析,加入亲和素前
3、后超声图像平均灰度值差异有统计学意义。结论成功制备出稳定的纳米液态氟碳脂质超声造影剂,并采用生物素亲和素法证明了该微球具有聚集后增强超声显影性能。关键词:纳米;液态氟碳;超声造影剂中图法分类号:文献标识码:APreparationandaggregationstudyofanovelperfluorocarbonlipidmicrolipheresultrasoundcontrastagentCHENSong,KANGJuan,WANGZhi-gang,LIPan,WUXing,XUChuan-shan(InstituteofUltrasoundImaging,Chongqing
4、UniversityofMedicalSciences,Chongqing400010,China)Abstract:ObjectiveTodevelopanovelnanoscaleultrasoniccontrastagent—perfluorocarbonlipidmicrolipheresandtoinvestigatetheirbasiccharactorsandcapabilitytoenhanceultrasoundimageswhenaggregated.MethodsPerfluorocarbonlipidmicroliphereswerepreparedbyh
5、ighpressurehomogen.Thephysico-chemicalpropertiesofthemicroliphereswasdetected.Biotinylatedperfluorocarbonlipidmicroliphereswerepreparedforultrasoundimagingbeforeandafteraddingstepavidin.TheaveragegrayscalevalueofthecapturedultrasoundimageswereanalyzedbytheDFYsoftware.ResultsThesemicrolipheres
6、wereuniformandstabilized,andthemeansizeis(171.9±91.0)nm.Therewasnovisuableultrasoundsignalsscatteredbackfromthemicrolipheresbeforeaddingstrepavidin,whileobviouslyultrasoundechosignalswereobservedafteraddingstrepavidin.Therewassignificantdifferencebetweenultrasoundimagesbefore/afteraddingstrep
7、avidin,whichwereanalyzedbyDFYsoftware.ConclusionsAsteadyperfluorocarbonlipidmicroliphereswerepreparedandthebiotinylatedmicrospherescouldaggregatetogetherintheexistenceofstrepavidinandenhancetheultrasoundimage.Theaggregatedmicrolipheresmightbe
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