Exploiting the interaction between halloysite and charged PNAs for their controlled release

Area of Science:

• Nanomedicine
• Materials Science
• Biotechnology

Background:

• Nanomaterials are crucial for developing smart nanosystems in nanomedicine.
• Halloysite nanotubes (HNTs) offer unique properties for delivering biologically active species.
• Peptide nucleic acids (PNAs) show therapeutic potential but have limited clinical applications.

Purpose of the Study:

• To investigate the supramolecular interactions between halloysite and three distinct peptide nucleic acids (PNAs).
• To understand how PNA charge influences their interaction with halloysite surfaces for drug delivery.
• To evaluate the potential of halloysite-PNA nanomaterials for targeted drug delivery and release.

Main Methods:

• Synthesis and characterization of PNA-loaded halloysite nanomaterials using spectroscopy, thermogravimetric analysis, and HAADF/STEM-EDX.
• Assessment of nanomaterial aqueous mobility via dynamic light scattering (DLS) and zeta-potential measurements.
• Investigation of PNA release kinetics at different pH values and molecular modeling calculations.

Main Results:

• PNA tetramers exhibited charge-dependent interactions with halloysite nanotube surfaces.
• The charge of PNAs significantly influenced their kinetic release from the halloysite nanomaterials.
• Characterization confirmed the successful loading of PNAs onto halloysite and provided insights into their morphology and stability.

Conclusions:

• Halloysite nanotubes are suitable carriers for PNA delivery, with interactions modulated by PNA charge.
• Understanding these interactions is key for designing effective halloysite-based nanocarriers for PNA therapeutics.
• This research paves the way for advanced nanomedicine platforms utilizing halloysite-PNA composites.