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Manufacture and Drug Delivery Applications of Silk Nanoparticles
Published on: October 8, 2016
Heterogeneity in nanoparticles influences biodistribution and targeting
Isaac M Adjei1, Chiranjeevi Peetla, Vinod Labhasetwar
1Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44106, USA.
Nanomedicine (London, England)
|June 27, 2013
Summary
Nanoparticle properties significantly impact biodistribution and tumor targeting. Optimizing nanocarrier formulation, specifically size and surface charge, is crucial for effective drug delivery and reduced off-target accumulation.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Pharmacology
Background:
- A significant portion of administered nanoparticles (NPs) accumulates in non-target tissues.
- Nanoparticle (NP) heterogeneity in size, charge, and texture may contribute to this off-target localization.
Purpose of the Study:
- To investigate the impact of NP heterogeneity on biodistribution and tumor targeting.
- To compare the in vivo behavior of nanoparticles with varying properties.
Main Methods:
- Simultaneous optical imaging of two distinct poly(d,l-lactide co-glycolide) nanoparticle populations in a prostate tumor xenograft mouse model.
- NPs varied in size and surface charge: small neutral NPs (S-neutral-NPs) and large anionic NPs (L-anionic-NPs).
Main Results:
- S-neutral-NPs exhibited significantly longer circulation times (t1/2 = 96 min) compared to L-anionic-NPs (t1/2 = 13 min).
- S-neutral-NPs showed 75% greater accumulation in the tumor and a 13-fold higher tumor-to-liver signal ratio than L-anionic-NPs.
- Despite identical formulation components, NP size and surface charge dictated distinct biodistribution patterns.
Conclusions:
- Nanoparticle formulation, specifically controlling size and surface charge, is critical for enhancing tumor targeting efficacy.
- Tailoring nanocarrier properties can significantly improve drug delivery efficiency and minimize off-target accumulation.
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