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Preparation of a novel lipid-core micelle using a low-energy emulsification method

Abstract

High-energy methods for the manufacturing of nanomedicines are widely used; however, interest in low-energy methods is increasing due to their simplicity, better control over the process, and energy-saving characteristics during upscaling. Here, we developed a novel lipid-core micelle (LCM) as a nanocarrier to encapsulate a poorly water-soluble drug, nifedipine (NFD), by hot-melt emulsification, a low-energy method. LCMs are self-assembling colloidal particles composed of a hydrophobic core and a hydrophilic shell. Hybrid materials, such as Gelucire 44/14, are thus excellent candidates for their preparation. We characterized the obtained nanocarriers for their colloidal properties, drug loading and encapsulation efficiency, liquid state, stability, and drug release. The low-energy method hot-melt emulsification was successfully adapted for the manufacturing of small and narrowly dispersed LCMs. The obtained LCMs had a small average size of ~ 11 nm and a narrow polydispersity index (PDI) of 0.228. These nanocarriers were able to increase the amount of NFD dispersible in water more than 700-fold. Due to their sustained drug release profile and the PEGylation of Gelucire 44/14, these nanocarriers represent an excellent starting point for the development of drug delivery systems designed for long circulation times and passive targeting.

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Funding

The authors acknowledge the funding support from FONDECYT 1181689, FONDAP 15130011, and STINT IB2015-6087.

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Correspondence to Javier O. Morales.

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Fritz, H.F., Ortiz, A.C., Velaga, S.P. et al. Preparation of a novel lipid-core micelle using a low-energy emulsification method. Drug Deliv. and Transl. Res. 8, 1807–1814 (2018). https://doi.org/10.1007/s13346-018-0521-9

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  • DOI: https://doi.org/10.1007/s13346-018-0521-9

Keywords

  • Lipid-core micelles
  • Low-energy method
  • Poorly water soluble drugs
  • Hot-melt emulsification
  • Nanocarriers