<abstract xmlns="http://www.w3.org/1999/xhtml">

Insulin and immunoglobulin therapy is commonly administered through injections that are invasive and painful. They cannot be taken orally because digestive enzymes break them down. To protect against enzymes, drug molecules may be “packed”, which decreases interaction of the active surface of the molecule with the environment. Silica nanoparticles (SiO2) may be used to attach proteins like insulin or immunoglobulin for use in drug delivery. They are stable and biocompatible. Exposing SiO2 nanoparticles to UV radiation may control molecule–nanoparticle attachment because of their electrostatic interactions. This study demonstrates the influence of UV radiation of SiO2 nanoparticles on insulin and immunoglobulin molecule attachment. Alteration of the surface electric potential of SiO2 nanoparticles by UV radiation was determined using electron work function measurements. Influence of radiation on formation of molecule-nanoparticle complexes was assessed by spectrophotometry of their sedimentation rate in solution. Increasing UV exposure time negatively charges the surfaces of SiO2 nanoparticles. Insulin exhibits better adsorption with SiO2 nanoparticles compared to immunoglobulin, likely due to favourable conditions promoting attractive electrostatic interactions. Longer UV exposure weakens insulin adsorption but does not significantly affect immunoglobulin adsorption.
</abstract>

Insulin and immunoglobulin therapy is commonly administered through injections that are invasive and painful. They cannot be taken orally because digestive enzymes break them down. To protect against enzymes, drug molecules may be “packed”, which decreases interaction of the active surface of the molecule with the environment. Silica nanoparticles (SiO2) may be used to attach proteins like insulin or immunoglobulin for use in drug delivery. They are stable and biocompatible. Exposing SiO2 nanoparticles to UV radiation may control molecule–nanoparticle attachment because of their electrostatic interactions. This study demonstrates the influence of UV radiation of SiO2 nanoparticles on insulin and immunoglobulin molecule attachment. Alteration of the surface electric potential of SiO2 nanoparticles by UV radiation was determined using electron work function measurements. Influence of radiation on formation of molecule-nanoparticle complexes was assessed by spectrophotometry of their sedimentation rate in solution. Increasing UV exposure time negatively charges the surfaces of SiO2 nanoparticles. Insulin exhibits better adsorption with SiO2 nanoparticles compared to immunoglobulin, likely due to favourable conditions promoting attractive electrostatic interactions. Longer UV exposure weakens insulin adsorption but does not significantly affect immunoglobulin adsorption.

UV Irradiated SiO2 Nanoparticles as Insulin and Immunoglobulin Molecule Carriers

Plovdiv University “Paisii Hilendarski”

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

This work is licensed under the Creative Commons Attribution 4.0 International License.

UV Irradiated SiO Nanoparticles as Insulin and Immunoglobulin Molecule Carriers

Insulin and immunoglobulin therapy is commonly administered through injections that are invasive and painful. They cannot be taken orally because digestive...

UV Irradiated SiO₂ Nanoparticles as Insulin and Immunoglobulin Molecule Carriers

Published Online: Apr 29, 2024

Page range: 127 - 132

Received: Jan 02, 2024

Accepted: Mar 28, 2024

DOI: https://doi.org/10.2478/prolas-2024-0019

Keywords
drug delivery, surface functionalization, electrostatic interactions, sedimentation, protein-nanoparticle adsorption

© 2024 Yuri Dekhtyar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

UV Irradiated SiO2 Nanoparticles as Insulin and Immunoglobulin Molecule Carriers

Published Online: Apr 29, 2024

Page range: 127 - 132

Received: Jan 02, 2024

Accepted: Mar 28, 2024

DOI: https://doi.org/10.2478/prolas-2024-0019

Keywordsdrug delivery, surface functionalization, electrostatic interactions, sedimentation, protein-nanoparticle adsorption

© 2024 Yuri Dekhtyar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

UV Irradiated SiO₂ Nanoparticles as Insulin and Immunoglobulin Molecule Carriers

Keywords
drug delivery, surface functionalization, electrostatic interactions, sedimentation, protein-nanoparticle adsorption