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An injectable in situ lipid phase transition system for sustained delivery of dabigatran etexilate with low burst release

机译:用于持续递送Dabigatran eDilexilate的原位脂相过渡系统的可注射,具有低爆裂释放

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摘要

Controlling initial burst release remains one of the greatest challenges in developing in situ-forming parenteral depot formulations. Here an injectable lipid phase transition system (LPTS) was fabricated to provide sustained release of dabigatran exilate (DABE) with low burst release. LPTS was prepared in a low-viscosity injectable state by simple mixing of sorbitan monooleate and phospholipids with ethanol. After subcutaneous injection, the liquid LPTS underwent a phase transition in situ and formed a semisolid mesophase, creating a drug-release depot. The physicochemical properties of DABE-LPTS were investigated using rheological techniques. Release profiles in vitro indicated that DABE-LPTS has suitable controlled release properties. Pharmacokinetic studies showed that DABE-LPTS significantly reduced the initial burst release after subcutaneous injection in rats. Pharmacodynamic studies showed that single administration of DABE-LPTS exerted anticoagulant effects in rats lasting 1 week. DABE-LPTS showed good biocompatibility in vitro and in vivo. Thus, the LPTS-based depot system shows promise for sustained DABE delivery with low burst release.
机译:控制初始爆发释放仍然是在形成肠胃外储存制剂中发展的最大挑战之一。这里制备可注射的脂相转变系统(LPTS)以提供具有低爆发释放的Dabigatran流放(Dabe)的持续释放。通过简单地混合脱水山梨糖醇单烯烃和磷脂与乙醇,在低粘度可注射状态下制备LPT。皮下注射后,液体LPTS在原位的相转变并形成半固体中间相,产生药物释放贮库。使用流变技术研究了Dabe-LPTS的物理化学性质。体外释放型材表明Dabe-LPTS具有合适的控释性能。药代动力学研究表明,DABE-LPTS在大鼠皮下注射后显着降低了初始爆裂爆发。药效学研究表明,单一施用Dabe-LPTS在持续1周的大鼠中施加抗凝血作用。 Dabe-LPTS在体外和体内显示出良好的生物相容性。因此,基于LPTS的Depot系统显示了低爆发释放的持续DABE递送的承诺。

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  • 来源
    《RSC Advances》 |2017年第89期|共8页
  • 作者单位

    Sichuan Univ West China Sch Basic &

    Forens Med Dept Biochem &

    Mol Biol Chengdu 610041 Sichuan Peoples R China;

    Sichuan Univ West China Sch Pharm Key Lab Drug Targeting &

    Drug Delivery Syst Minist Educ Chengdu 610041 Sichuan Peoples R China;

    Sichuan Univ West China Sch Pharm Key Lab Drug Targeting &

    Drug Delivery Syst Minist Educ Chengdu 610041 Sichuan Peoples R China;

    Sichuan Univ West China Sch Pharm Key Lab Drug Targeting &

    Drug Delivery Syst Minist Educ Chengdu 610041 Sichuan Peoples R China;

    Sichuan Univ West China Sch Pharm Key Lab Drug Targeting &

    Drug Delivery Syst Minist Educ Chengdu 610041 Sichuan Peoples R China;

    Sichuan Univ West China Sch Basic &

    Forens Med Dept Biochem &

    Mol Biol Chengdu 610041 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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