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[Preparation and characterization of nanoemulsion]
Yu-Jing Sun1, Dao-Cheng Wu, Yun-Xin Cao
1Department of Pathology, Fourth Military Medical University, Xi'an 710032, China. sunyuj@fmmu.edu.cn
Summary
Nanoemulsion-encapsulated bovine serum albumin (BSA-FITC) nanoparticles were successfully prepared and demonstrated efficient uptake by dendritic cells (DCs) and macrophages. This suggests potential for nanoemulsions as carriers for antigen-presenting cell (APC)-targeted cancer vaccines.
Area of Science:
- Biotechnology
- Nanomedicine
- Immunology
Background:
- Nanoemulsions offer potential for drug delivery systems.
- Antigen-presenting cells (APCs), such as dendritic cells (DCs) and macrophages, are crucial for initiating immune responses.
- Targeting APCs is a key strategy for developing effective cancer vaccines.
Purpose of the Study:
- To prepare nanoemulsion-encapsulated BSA-FITC (NEBSA-FITC).
- To characterize the physicochemical properties of NEBSA-FITC.
- To evaluate the cellular uptake of NEBSA-FITC by DCs and macrophages.
Main Methods:
- Nanoemulsion preparation via interfacial polymerization.
- Characterization of size, encapsulation rate, drug-carrying capacity, and stability using Sephadex-G100 chromatography and electron microscopy.
- Assessment of cellular uptake using Flow Cytometry (FACS) and laser confocal microscopy.
Main Results:
- NEBSA-FITC exhibited a mean size of (25±10) nm with high encapsulation efficiency (91%) and good stability.
- DCs and macrophages showed significantly higher uptake of NEBSA-FITC compared to free BSA.
- Laser confocal microscopy confirmed NEBSA-FITC localization within the cytoplasm of DCs.
Conclusions:
- Nanoemulsions are efficiently internalized by DCs and macrophages.
- NEBSA-FITC demonstrates promise as a carrier for APC-targeted antitumor vaccines.
- This approach may enhance vaccine efficacy through targeted delivery to antigen-presenting cells.