Related Experiment Video
Updated: May 6, 2026
A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
Published on: December 23, 2016
Shell-crosslinked knedel-like nanoparticles induce lower immunotoxicity than their non-crosslinked analogs
Mahmoud Elsabahy1, Sandani Samarajeewa, Jeffery E Raymond
1Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States ; Department of Pharmaceutics, Faculty of Pharmacy, Assiut Clinical Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt.
Crosslinking polymeric nanoparticles significantly reduces their toxicity and immunotoxicity, offering a promising advancement for nanotechnology-based therapeutics and diagnostics. This method proves more effective than PEGylation in enhancing nanomaterial safety for clinical applications.
Area of Science:
- Biomaterials Science
- Nanomedicine
- Polymer Chemistry
Background:
- Developing stable, low-toxicity nanoparticles is crucial for advanced therapeutics and diagnostics.
- Current nanomedicines face challenges with stability, toxicity, and immunogenicity.
- Crosslinked nanoparticles offer enhanced structural integrity and reduced cytotoxicity compared to non-crosslinked micelles.
Purpose of the Study:
- To synthesize and characterize poly(acrylamidoethylamine)-block-poly(DL-lactide) (PAEA-b-PDLLA) copolymers.
- To investigate the impact of surface PEGylation and varying degrees of PAEA layer crosslinking on nanoparticle properties.
- To evaluate the cytotoxicity and immunotoxicity of these modified polymeric nanoparticles.
Main Methods:
- Synthesis of PAEA-b-PDLLA block copolymers.
- Self-assembly of copolymers into polymeric micelles in aqueous solution.
- Surface modification via PEGylation and controlled crosslinking of the PAEA layer.
- Assessment of physicochemical characteristics, cytotoxicity, and immunotoxicity.
Main Results:
- Crosslinking was found to efficiently reduce the immunotoxicity of polymeric nanomaterials.
- Increased crosslinking density decreased biomolecule accessibility to the nanoparticle core.
- Higher degrees of crosslinking led to reduced cytotoxicity and immunotoxicity, outperforming PEGylation in reducing immunotoxicity.
Conclusions:
- Shell-crosslinking of block copolymer micelles is a highly effective strategy for reducing nanomaterial immunotoxicity.
- Crosslinking offers superior immunomodulatory benefits compared to PEGylation for nanomedicines.
- This approach is expected to significantly advance the clinical development and applications of polymeric nanoparticles in nanomedicine.
