Formulation and Characterization of Bone-Targeting Vancomycin-Loaded Liposomes
<b>Background:</b> We report the successful formulation of a bone-targeted vancomycin-loaded liposomal carrier. <b>Method:</b> The basic liposomal structure is composed of 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), cholesterol, and dicetyl phosphate (DCP) in a molar r...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Pharmaceutics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1999-4923/17/6/792 |
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| Summary: | <b>Background:</b> We report the successful formulation of a bone-targeted vancomycin-loaded liposomal carrier. <b>Method:</b> The basic liposomal structure is composed of 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), cholesterol, and dicetyl phosphate (DCP) in a molar ratio of 3:1:0.25, respectively. The dehydration–rehydration method was used to maximize the liposomal-encapsulation efficiency of vancomycin after the initial preparation using thin-film hydration. <b>Results:</b> Sodium alendronate was used as a targeting moiety and was successfully conjugated to DSPE–PEG–COOH via carbodiimide chemistry, as was confirmed using IR spectroscopy. The resulting conjugate, DSPE–PEG-alendronate, was subsequently used in the formulation of bone-targeting vancomycin-loaded liposomes. In vitro binding assays with hydroxyapatite demonstrated preferential binding of the surface-modified liposomes to hydroxyapatite crystals. Furthermore, ex vivo studies revealed that the surface-modified liposomes exhibited enhanced binding affinity to the tibial bone tissue of 4-week-old male CD1 mice, in comparison to unmodified liposomes. <b>Conclusions:</b> The successfully formulated surface-modified vancomycin loaded liposomes showed enhanced bone affinity with a great potential for targeting the antibiotic to infected bones. |
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| ISSN: | 1999-4923 |