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1、冰片-薄荷脑低共熔物对纳米粒鼻腔给药载药入脑的影响[基金项目]国家自然科学基金项目(30772793),浙江省卫生高层次创新人才培养工程柴国宝[作者简介]柴国宝,男,硕士研究生,研究方向:药物新剂型与新技术,Tel:(0571)86613726,夏爱晓,蔡鑫君,魏颖慧,冯健,李范珠*[通讯作者]李范珠,教授,博士生导师,Tel:(0571)86633030Fax:(0571)86613606Email:lifanzhu@zjtcm.net(浙江中医药大学药学院,杭州,310053)摘要目的:考察中药冰片-薄荷脑低共熔物对神经毒素纳米粒鼻腔给药吸收入脑的影
2、响。方法:采用125I同位素标记法,以清醒自由活动大鼠为实验模型,运用脑微透析取样技术,测定脑内神经毒素浓度的变化,并应用药动学软件计算药动学参数。结果:中药冰片-薄荷脑低共熔物纳米粒脑药动学符合二室模型,Tmax、Cmax、AUC、t1/2(β)分别为0.68h、27.32ng/mL、132.68ng·h/mL、3.1076h,其入脑的速度与程度均优于单用薄荷脑或者冰片。结论:神经毒素纳米粒在冰片-薄荷脑低共熔物作用下,可显著增加其鼻腔吸收入脑的药量,且能较快达到峰浓度,消除缓慢。关键词:冰片-薄荷脑低共熔物;纳米粒;鼻腔给药;脑药动学Effectof
3、borneol/mentholumeutecticmixtureonnasal-braindeliveryofneurotoxinloadednanoparticlesCHAIGuo-bao,XIAAi-xiao,CAIXin-jun,WEIYing-hui,FenJian,LIFan-zhu*(CollegeofPharmacy,ZhejiangUniversityofTraditionalChineseMedicine,Hangzhou,310053)ABSTRACTObjectiveToinvestigatetheabsorptionenhance
4、neffectofborneol/mentholumeutecticmixture(BO/ME)onnasal-braindeliveryofneurotoxinloadednanoparticles.MethodsUsingmicrodialysissamplingtechniqueinawakefreely-movingrats,thecounterperminute(cpm)ofdialysatesinrightPAGofNT-loadednanoparticleswiththeBO/ME(BO/ME-NT-NP),radiolabeledwith
5、sodium125I-Iodide,weremeasuredinagamma-counterforradioactivity.AfterconvertingcpmintocorrespondingconcentrationsofNTbyinvivorecoveryofmicrodialysisprobes,thepharmacokineticparameterswerecalculated.ResultsThe8BO/ME-NT-NPcouldbeabsorbedintothebrain,muchbettertoNT-NPandthenanopartic
6、leswithborneolormentholumonly,andthepharmacokineticsaccordedwiththetwo-compartmentmodel.Theparameterstmax,cmax,AUC,t1/2(β)were0.68h,27.32ng/mL,132.68ng·h/mL,3.1076h.ConclusionWithaddingBO/MEasabsorptionenhancer,NTcouldbesignificantlyincreasedinthebrainwiththehelpofnanopartilcesas
7、carriers,andthetimetomaximalconcentrationwasshort,theeliminationprocesswasprolonged.KeyWords:bornel/mentholumeutecticmixture;nanoparticles;intranasaladminister-ation;brainpharmacokinetic纳米药物载体系统具有靶向、缓释、保护药物等多重作用。前期实验表明[1-2]:纳米粒作为神经毒素(Neurotoxin,NT)的载体,既能保持药物的活性,又能增加药物的脑内含量。临床上,NT
8、主要的给药方式为肌内注射[3],但起效慢(3~5h),难以满足临床要求。鼻腔给药