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Published on: February 19, 2016
Single-component solid lipid nanocarriers prepared with ultra-long chain amphiphilic lipids
Wei Wei1, Xiaonan Lu2, Zegao Wang3
1Department of Engineering, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark; Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
Novel sugar alcohol mono-behenates form stable single-component solid lipid nanocarriers (SC-SLNs). Sorbitol-based nanocarriers demonstrated optimal size, high drug encapsulation, and sustained release of fenofibrate.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
- Drug Delivery
Background:
- Sugar alcohol mono-behenates are synthetic lipids with properties suitable for developing stable single-component solid lipid nanocarriers (SC-SLNs).
- The characteristics of these lipids, including their polar head group, influence the performance of nanocarriers.
- Understanding these relationships is crucial for designing effective lipid-based drug delivery systems.
Purpose of the Study:
- To investigate the preparation of SC-SLNs using sugar alcohol mono-behenates with varied polar head groups.
- To evaluate the impact of preparation methods (emulsification-diffusion and melting-probe sonication) on SC-SLN characteristics.
- To assess the encapsulation efficiency and drug release profile of fenofibrate-loaded SC-SLNs.
Main Methods:
- SC-SLNs were prepared using emulsification-diffusion and melting-probe sonication techniques.
- Varied polar head groups on sugar alcohol mono-behenates were synthesized and utilized.
- Fenofibrate was encapsulated as a model lipophilic drug; its release was studied using a lipolysis model.
- Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM) were employed for structural analysis.
Main Results:
- Particle size and distribution were significantly affected by both the polar head group and preparation method.
- Sorbitol mono-behenate-based nanocarriers achieved the smallest mean size (approx. 100 nm, PDI 0.26).
- These nanocarriers exhibited high fenofibrate entrapment efficiency (95%) and sustained drug release.
- Different preparation methods resulted in distinct nanocarrier structures: lipid bilayers (emulsification-diffusion) versus lipid monolayers (melting-probe sonication).
Conclusions:
- The choice of polar head group and preparation method are critical factors in developing SC-SLNs.
- Sorbitol mono-behenates are promising lipids for creating stable SC-SLNs with excellent drug encapsulation and release properties.
- This research provides valuable insights for the systematic design of novel amphiphilic lipids for advanced drug delivery applications.
