Protein Nanoparticle Development for Bioactive Compound Delivery

Protein nanoparticles have emerged as versatile carriers for a broad spectrum of bioactive compounds, ranging from small-molecule drugs and peptides to vitamins and nutraceuticals. Their inherent biocompatibility, biodegradability and capacity for surface functionalisation confer advantages over synthetic polymeric systems. Central to their appeal is the ability to exploit natural protein interactions—electrostatic, hydrophobic and hydrogen bonding—to achieve self-assembly under mild conditions. Preparation methods span desolvation, emulsification, thermal denaturation and controlled glycation, each offering distinct control over particle size, surface charge and release kinetics. Targeted delivery can be attained via ligand conjugation or pH-responsive moieties, ensuring site-specific release in physiological environments. Recent advances have emphasised scalability, reproducibility and the translation of laboratory protocols into industrial processes, thereby addressing longstanding challenges in stability, batch-to-batch consistency and regulatory compliance. Applications extend from oral and parenteral drug delivery to topical and transdermal platforms, with particular focus on enhancing solubility, prolonging circulation time and reducing off-target effects. The convergence of protein engineering, colloid science and formulation technology has set the stage for next-generation nanoparticle systems with finely tuned pharmacokinetic and pharmacodynamic profiles.

Research from Nature Portfolio

Recent studies have demonstrated that complexation of ovalbumin with carboxymethyl cellulose near the protein’s isoelectric pH, followed by mild thermal treatment, yields nanoparticles with markedly improved emulsifying stability. The electrostatic repulsion afforded by the polysaccharide prevents protein aggregation both before and after heating, while exposure of hydrophobic clusters enhances interfacial activity. The optimised complexes exhibit reduced droplet size and superior resistance to coalescence, thereby expanding their utility in acidic, emulsion-based formulations.

Protein Nanoparticle Development for Bioactive Compound Delivery publication trend

The graph below shows the total number of articles in protein nanoparticle development for bioactive compound delivery across all publications each year (not limited to Nature Index journals).

Technical terms

Desolvation: A method for forming protein nanoparticles by precipitating protein from aqueous solution upon addition of a non-solvent.

Polydispersity index: A dimensionless measure of the breadth of particle size distribution in a nanoparticulate system.

Zeta potential: The electric potential at the slipping plane of a particle in suspension, indicative of colloidal stability.

Encapsulation efficiency: The proportion of a bioactive agent that is successfully incorporated into a carrier relative to the initial amount used.

Isoelectric point: The pH at which a protein possesses no net electric charge, often correlating with minimal solubility and maximal aggregation.

References

1. Improving emulsion stability based on ovalbumin-carboxymethyl cellulose complexes with thermal treatment near ovalbumin isoelectric point. Scientific Reports (2020).
2. Acid–Heat-Induced Fabrication of Nisin-Loaded Egg White Protein Nanoparticles: Enhanced Structural and Antibacterial Stability. Foods (2024).
3. Spectroscopic Characterization of the Binding and Release of Hydrophilic, Hydrophobic and Amphiphilic Molecules from Ovalbumin Supramolecular Hydrogels. Gels (2022).
4. Preparation of Solid Lipid Nanoparticle-Containing Ovalbumin Based Reverse Micelle-Double Emulsion Technique. Majalah Farmaseutik (2023).