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Low-Fouling and Biodegradable Protein-Based Particles for Thrombus Imaging
Thomas Bonnard1, Anand Jayapadman1, Jasmine A Putri1
1Nanobiotechnology Laboratory, Australian Centre for Blood Diseases, Central Clinical School , Monash University , Melbourne 3004 , Victoria , Australia.
ACS Nano
|June 8, 2018
Summary
Researchers developed new biodegradable protein-based nanoparticles (PASKE particles) for vascular disease imaging. These particles avoid immune detection, circulate longer than albumin, and degrade safely, showing promise for noninvasive molecular imaging.
Area of Science:
- Biomaterials Science
- Nanomedicine
- Vascular Biology
Background:
- Nanoparticle sequestration by the mononuclear phagocytic system limits nanomedicine efficacy for vascular diseases.
- Nondegradable polymers like poly(ethylene glycol) reduce immune recognition but pose accumulation risks.
- Need for biodegradable, low-fouling, and immunologically inert nanoparticles for clinical applications.
Purpose of the Study:
- To develop a novel, biodegradable, low-fouling nanoparticle platform using exclusively protein material.
- To create a versatile platform for molecular imaging and potential therapy in vascular diseases.
Main Methods:
- Designed a recombinant protein with proline, alanine, and serine (PAS) repeats for hydrophilicity.
- Cross-linked PAS protein with lysine (K) and polyglutamic acid (E) into particles using mesoporous silica templating (PASKE particles).
- Evaluated particle low-fouling properties, circulation time, degradation, and imaging potential in a mouse model of carotid artery thrombosis.
Main Results:
- PASKE particles exhibited low-fouling characteristics and prolonged circulation compared to albumin-based particles.
- Particles were rapidly degraded within the cell's lysosomal compartment, indicating biocompatibility.
- Functionalized PASKE particles successfully targeted activated platelets for noninvasive molecular imaging of vascular thrombosis.
Conclusions:
- PASKE particles represent a promising biodegradable and versatile platform for nanomedicine.
- This protein-based nanoparticle system offers a potential solution for safe and effective vascular disease diagnosis and therapy.
- The developed platform shows significant potential for noninvasive molecular imaging of vascular diseases.
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