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Published on: December 27, 2013
Biodegradable PLGA based nanoparticles for sustained regional lymphatic drug delivery
Deepa A Rao1, M Laird Forrest, Adam W G Alani
1Department of Pharmaceutical Sciences, Drake University, Des Moines, Iowa 50265, USA. deepa.rao@drake.edu
Journal of Pharmaceutical Sciences
|November 11, 2009
Summary
Biodegradable nanoparticles are optimized for lymphatic drug delivery. Smaller, less hydrophobic, and more anionic particles show increased uptake and retention in lymph nodes for regional therapy.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Pharmacology
Background:
- Developing effective drug delivery systems is crucial for targeted therapies.
- Lymphatic drug delivery offers potential for regional treatment and reduced systemic exposure.
- Biodegradable nanoparticles present a promising platform for controlled drug release and enhanced bioavailability.
Purpose of the Study:
- To evaluate biodegradable drug carriers for preferential lymphatic uptake and retention.
- To investigate the impact of nanoparticle size, hydrophobicity, and surface charge on lymphatic delivery.
- To identify optimal nanoparticle characteristics for sustained regional drug delivery.
Main Methods:
- Preparation of poly(lactic-co-glycolic acid)-based nanoparticles (PLGA-PMA:PLA-PEG) and polystyrene particles (PS) via nanoprecipitation.
- Characterization of particle size and zeta potential using dynamic light scattering and laser doppler anemometry.
- In vivo evaluation of lymphatic uptake and lymph node retention in a rat model following subcutaneous administration.
Main Results:
- Lymphatic uptake and retention of PLGA-PMA:PLA-PEG nanoparticles were inversely related to particle size.
- Reduced hydrophobicity of nanoparticles correlated with increased lymphatic uptake and retention compared to polystyrene particles.
- Anionic surface charge density on PLGA-PMA:PLGA-COOH particles directly enhanced lymphatic uptake and retention.
- 50 nm PLGA-PMA:PLA-PEG nanoparticles demonstrated ideal characteristics for sustained lymphatic delivery.
Conclusions:
- Nanoparticle size, hydrophobicity, and surface charge are critical determinants of lymphatic uptake and retention.
- Optimized biodegradable nanoparticles can achieve preferential lymphatic delivery for sustained regional drug administration.
- These findings support the use of 50 nm PLGA-PMA:PLA-PEG nanoparticles for the prevention or treatment of oligometastases through regional lymphatic delivery.
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