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1、川陈皮素自组装前体脂质体的制备及其大鼠体内药动学研究林薇,姚静,周建平*通讯作者: Tel:86-25-83271272,Fax:86-25-83301606E-mail:zhoujianp60@163.com(中国药科大学药剂教研室,江苏南京210009)摘要:本文研制川陈皮素自组装前体脂质体,并以混悬剂为对照考察其经大鼠灌胃给药后的药代动力学行为。采用一种新型前体脂质体法制备川陈皮素前体脂质体,考察其水合后粒径、包封率、稳定性等理化性质;大鼠分别灌胃给予川陈皮素混悬剂和水合后的脂质体后,以尼莫地平为内标,采用HPLC法测定血浆中药物浓度,用Kinatica4.4程序计算药动学参数。制得
2、的脂质体包封率可达80%以上,平均粒径为212.1nm,稳定性好;药代动力学研究显示,与混悬剂相比川陈皮素脂质体在体内吸收较快,相对生物利用度264.3%,MRT增加。结果表明,液态前体脂质体制备工艺简单,可行性高;川陈皮素制成前体脂质体后,大鼠口服吸收显著增加,并具有一定的缓释作用。关键词:川陈皮素;自组装前体脂质体;药代动力学Preparationofself-assemblenobiletinproliposomesanditspharmacokineticsinratsLINWei,YAOJing,ZHOUJian-ping﹡(DepartmentofPharmaceutics,C
3、hinaPharmaceuticalUniversity,Nanjing210009,China)Abstract:Toprepareself-assemblenobiletinproliposomesandstudythepharmacokineticbehaviorofnobiletininratsafterigadministrationofnobiletinpro-liposomesandnobiletinsuspension.Nobiletinproliposomeswerepreparedbyanewkindofproliposomepreparationmethod,thet
4、estsofphysicochemicalpropertiesincludingencapsulationefficiency,particlesizeandstabilityofformedliposomeweredetermined.Nobiletinsuspensionandnobiletinproliposmeswereadministratedtoratsbyigadministration,respectively.Plasmaconcentrationofnobiletinwas9/9determinedbyHPLCtakingnimodipineasinternalstan
5、dard.ThepharmacokineticparameterswerecalculatedbyKinetica4.4software.Theencapsulationefficiencyofnobiletinliposomeswasmorethan80%,withanaverageparticlesizeof212.1nmandverygoodstability.Comparedtonobiletinsuspension,nobiletinproliposomespossessedhigherabsorptiverateandlongerMRT,andtherelativebioava
6、ilabilitywas264.3%inrat.Itcouldbeconcludedthatnobiletinproliposomeswasasimpleandfeasiblepreparation,andshowedgreaterabsorptionandsustained-releasecharacteristicscomparedwiththatofnobiletin.Keywords:nobiletin;self-assembleproliposome;pharmacokinetics川陈皮素(nobiletin,NOB)是从橘柑类植物中提取的多甲氧基黄酮类化合物,具有抗炎[1]、
7、抗癌[2]等多种药理作用,抗癌作用表现为抗癌谱广,能预防癌症发生,防止肿瘤转移、复发,增强免疫力[2,3]等。目前国内外对川陈皮素的研究主要集中在药理方面,制剂学研究仅见有微乳报道[4]。川陈皮素脂溶性差且难溶于水,口服生物利用度低,脂质体作为新型的载体给药系统,具有生物膜特性和药物传输能力,将难溶性药物包裹在脂质双分子层中,使其具有较强的两亲性,可以显著提高药物的口服跨膜吸收及体内生物利用度[5]。本研究将川陈皮素制成