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Updated: Jun 12, 2026
10:01
Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
Published on: April 8, 2020
Cellular association and assembly of a multistage delivery system
Rita E Serda1, Aaron Mack, Merlyn Pulikkathara
1Department of Nanomedicine and Biomedical Engineering, University of Texas Health Science Center (UTHSC), Houston, TX 77030, USA. Rita.Serda@uth.tmc.edu
Small (Weinheim an Der Bergstrasse, Germany)
|June 3, 2010
Summary
Researchers developed a multistage delivery system (MDS) using porous silicon microparticles to carry superparamagnetic iron oxide nanoparticles (SPIONs). This targeted system enhances agent delivery and imaging capabilities.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Drug Delivery Systems
Background:
- Blood-borne delivery systems face biological barriers.
- Multistage delivery systems (MDS) aim to overcome these barriers for enhanced therapeutic and diagnostic agent delivery.
- Porous silicon microparticles serve as carriers for nanoparticles.
Purpose of the Study:
- To fabricate and characterize a multistage delivery system (MDS) for enhanced delivery of therapeutic and diagnostic agents.
- To investigate the loading, retention, and release of superparamagnetic iron oxide nanoparticles (SPIONs) within silicon microparticles.
- To evaluate the potential of the MDS for targeted delivery and biological imaging.
Main Methods:
- Fabrication of porous silicon microparticles as carriers for SPIONs.
- Aminosilylation of microparticles to enhance nanoparticle retention.
- Characterization using electron microscopy, atomic force microscopy (AFM), and X-ray photoelectron microscopy.
- In vivo studies in mice and phantom models for magnetic resonance imaging (MRI).
Main Results:
- Successful loading and enhanced retention of SPIONs within silicon microparticles via aminosilylation.
- Demonstrated co-localization of microparticles and SPIONs in various tissues, with enhanced SPION release in the spleen.
- SPION-loaded MDS showed negative contrast in MRI, and antibody conjugation improved endothelial association.
Conclusions:
- The developed multistage delivery system (MDS) effectively carries and releases SPIONs, overcoming biological barriers.
- Silane modification enhances nanoparticle retention and enables targeted delivery through antibody conjugation.
- The MDS shows promise for advanced biological imaging and targeted therapeutic applications.
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