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Updated: Apr 28, 2026

Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins
Published on: August 31, 2019
Effect of solubilizing agents on mupirocin loading into and release from PEGylated nanoliposomes
Ahuva Cern1, Einat Nativ-Roth2, Amiram Goldblum3
1Laboratory of Membrane and Liposome Research, Department of Biochemistry, IMRIC, The Hebrew University - Hadassah Medical School, Jerusalem, Israel; Molecular Modeling and Drug Design Laboratory, The Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel.
Abstract:
Mupirocin was identified by quantitative structure property relationship models as a good candidate for remote liposomal loading. Mupirocin is an antibiotic that is currently restricted to topical administration because of rapid hydrolysis in vivo to its inactive metabolite. Formulating mupirocin in PEGylated nanoliposomes may potentially expand its use to parenteral administration by protecting it from degradation in the circulation and target it (by the enhanced permeability effect) to the infected tissue. Mupirocin is slightly soluble in aqueous medium and its solubility can be increased using solubilizing agents. The effect of the solubilizing agents on mupirocin remote loading was studied when the solubilizing agents were added to the drug loading solution. Propylene glycol was found to increase mupirocin loading, whereas polyethylene glycol 400 showed no effect. Hydroxypropyl-β-cyclodextrin (HPCD) showed a concentration-dependent effect on mupirocin loading; using the optimal HPCD concentration increased loading, but higher concentrations inhibited it. The inclusion of HPCD in the liposome aqueous phase while forming the liposomes resulted in increased drug loading and substantially inhibited drug release in serum.
Insights
Mupirocin antibiotic loading into nanoliposomes was enhanced using solubilizing agents like propylene glycol and hydroxypropyl-β-cyclodextrin (HPCD). This formulation may enable parenteral delivery by protecting mupirocin from degradation.
Area of Science:
- Pharmaceutical Sciences
- Drug Delivery Systems
- Nanotechnology
Background:
- Mupirocin is an antibiotic limited to topical use due to rapid in vivo hydrolysis.
- Nanoliposomal formulation offers potential for parenteral administration and targeted delivery.
- Solubilizing agents can improve drug loading in liposomes.
Purpose of the Study:
- To investigate the effect of solubilizing agents on remote mupirocin loading into PEGylated nanoliposomes.
- To evaluate the impact of these agents on drug stability and release characteristics.
Main Methods:
- Quantitative structure-property relationship (QSPR) modeling identified mupirocin as suitable for liposomal loading.
- Nanoliposomes were formulated with PEGylation.
- Solubilizing agents (propylene glycol, polyethylene glycol 400, hydroxypropyl-β-cyclodextrin) were added to the drug loading solution.
- Drug loading efficiency and in vitro release were assessed.
Main Results:
- Propylene glycol increased mupirocin loading into nanoliposomes.
- Polyethylene glycol 400 had no significant effect on loading.
- Hydroxypropyl-β-cyclodextrin (HPCD) demonstrated a concentration-dependent effect, enhancing loading at optimal concentrations but inhibiting it at higher levels.
- Incorporating HPCD during liposome formation increased drug loading and significantly reduced serum-mediated drug release.
Conclusions:
- Solubilizing agents, particularly propylene glycol and optimized HPCD concentrations, can enhance mupirocin remote loading into nanoliposomes.
- HPCD inclusion improves drug loading and stability, suggesting potential for developing parenteral mupirocin formulations.
- PEGylated nanoliposomes with HPCD show promise for protecting mupirocin from degradation and controlling its release.
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