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ROPISA Synthetic Strategy for Photo-Crosslinked Aqueous Polypeptide Nano-Assemblies
Akshaya Maria Prasad1, Parshuram Kambale1, Rahul Nisal1
1Department of Chemistry, Indian Institute of Science Education and Research, Pune (IISER Pune), Pune, Maharashtra, India.
Chemistry, an Asian Journal
|August 5, 2026
Summary
Researchers developed a one-pot method for creating stable polypeptide nanoparticles using photo-crosslinking. This technique simplifies the self-assembly process for biomedical applications, yielding robust nano-assemblies.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Polypeptides mimic natural structures but require complex self-assembly for biomedical uses.
- Existing methods for polypeptide nanoparticle synthesis are often multistep and inefficient.
Purpose of the Study:
- To develop a simplified, one-pot strategy for creating stable polypeptide nanoparticles.
- To utilize a photo-crosslinking approach for enhanced nanoparticle stability and functionality.
Main Methods:
- Designed a cinnamoyl-functionalized l-serine N-carboxyanhydride (NCA) monomer.
- Employed ring-opening polymerization-induced self-assembly (ROPISA) in water with a PEG-amine macroinitiator.
- Utilized UV irradiation (265 nm) for photo-crosslinking of cinnamoyl groups.
Main Results:
- Successfully synthesized amphiphilic PEG-polypeptide di-block copolymers.
- Formed stable spherical nanoparticles (25-30 nm) via ROPISA.
- Demonstrated photo-crosslinking via [2+2] cycloaddition, maintaining nanoparticle integrity and stability.
- Showcased nanoparticles as effective scaffolds for both water-soluble and insoluble cargo loading.
Conclusions:
- A facile one-pot photo-crosslinking strategy for polypeptide nanoparticle self-assembly was established.
- The developed nanoparticles exhibit high stability and are suitable for diverse cargo delivery applications.
- This method offers a promising route for creating advanced photo-crosslinkable polypeptide nano-assemblies.
