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Silica@zirconia core@shell nanoparticles for nucleic acid building block sorption

Livia Naszalyi Nagy (UGent) , Evert Dhaene (UGent) , Matthias Van Zele, Judith Mihály, Szilvia Klébert, Zoltán Varga, Katalin E. Kövér, Klaartje De Buysser (UGent) , Isabel Van Driessche (UGent) , José Martins (UGent) , et al.
(2021) NANOMATERIALS. 11(9).
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Abstract
The development of delivery systems for the immobilization of nucleic acid cargo molecules is of prime importance due to the need for safe administration of DNA or RNA type of antigens and adjuvants in vaccines. Nanoparticles (NP) in the size range of 20–200 nm have attractive properties as vaccine carriers because they achieve passive targeting of immune cells and can enhance the immune response of a weakly immunogenic antigen via their size. We prepared high capacity 50 nm diameter silica@zirconia NPs with monoclinic/cubic zirconia shell by a green, cheap and up-scalable sol–gel method. We studied the behavior of the particles upon water dialysis and found that the ageing of the zirconia shell is a major determinant of the colloidal stability after transfer into the water due to physisorption of the zirconia starting material on the surface. We determined the optimum conditions for adsorption of DNA building blocks, deoxynucleoside monophosphates (dNMP), the colloidal stability of the resulting NPs and its time dependence. The ligand adsorption was favored by acidic pH, while colloidal stability required neutral-alkaline pH; thus, the optimal pH for the preparation of nucleic acid-modified particles is between 7.0–7.5. The developed silica@zirconia NPs bind as high as 207 mg dNMPs on 1 g of nanocarrier at neutral-physiological pH while maintaining good colloidal stability. We studied the influence of biological buffers and found that while phosphate buffers decrease the loading dramatically, other commonly used buffers, such as HEPES, are compatible with the nanoplatform. We propose the prepared silica@zirconia NPs as promising carriers for nucleic acid-type drug cargos.
Keywords
General Materials Science, General Chemical Engineering, nanocarrier, nanoparticle, age-dependent adsorption, Langmuir isotherm, deoxynucleoside monophosphate, silica@zirconia, core@shell, solution NMR, buffer interference with adsorption, ADSORPTION, ZRO2, NANOCARRIERS, NUCLEOSIDES, DISSOLUTION, ADJUVANTS, VACCINES, SPHERES, CO2

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MLA
Naszalyi Nagy, Livia, et al. “Silica@zirconia Core@shell Nanoparticles for Nucleic Acid Building Block Sorption.” NANOMATERIALS, vol. 11, no. 9, 2021, doi:10.3390/nano11092166.
APA
Naszalyi Nagy, L., Dhaene, E., Van Zele, M., Mihály, J., Klébert, S., Varga, Z., … Fehér, K. (2021). Silica@zirconia core@shell nanoparticles for nucleic acid building block sorption. NANOMATERIALS, 11(9). https://doi.org/10.3390/nano11092166
Chicago author-date
Naszalyi Nagy, Livia, Evert Dhaene, Matthias Van Zele, Judith Mihály, Szilvia Klébert, Zoltán Varga, Katalin E. Kövér, et al. 2021. “Silica@zirconia Core@shell Nanoparticles for Nucleic Acid Building Block Sorption.” NANOMATERIALS 11 (9). https://doi.org/10.3390/nano11092166.
Chicago author-date (all authors)
Naszalyi Nagy, Livia, Evert Dhaene, Matthias Van Zele, Judith Mihály, Szilvia Klébert, Zoltán Varga, Katalin E. Kövér, Klaartje De Buysser, Isabel Van Driessche, José Martins, and Krisztina Fehér. 2021. “Silica@zirconia Core@shell Nanoparticles for Nucleic Acid Building Block Sorption.” NANOMATERIALS 11 (9). doi:10.3390/nano11092166.
Vancouver
1.
Naszalyi Nagy L, Dhaene E, Van Zele M, Mihály J, Klébert S, Varga Z, et al. Silica@zirconia core@shell nanoparticles for nucleic acid building block sorption. NANOMATERIALS. 2021;11(9).
IEEE
[1]
L. Naszalyi Nagy et al., “Silica@zirconia core@shell nanoparticles for nucleic acid building block sorption,” NANOMATERIALS, vol. 11, no. 9, 2021.
@article{8719946,
  abstract     = {{The development of delivery systems for the immobilization of nucleic acid cargo molecules is of prime importance due to the need for safe administration of DNA or RNA type of antigens and adjuvants in vaccines. Nanoparticles (NP) in the size range of 20–200 nm have attractive properties as vaccine carriers because they achieve passive targeting of immune cells and can enhance the immune response of a weakly immunogenic antigen via their size. We prepared high capacity 50 nm diameter silica@zirconia NPs with monoclinic/cubic zirconia shell by a green, cheap and up-scalable sol–gel method. We studied the behavior of the particles upon water dialysis and found that the ageing of the zirconia shell is a major determinant of the colloidal stability after transfer into the water due to physisorption of the zirconia starting material on the surface. We determined the optimum conditions for adsorption of DNA building blocks, deoxynucleoside monophosphates (dNMP), the colloidal stability of the resulting NPs and its time dependence. The ligand adsorption was favored by acidic pH, while colloidal stability required neutral-alkaline pH; thus, the optimal pH for the preparation of nucleic acid-modified particles is between 7.0–7.5. The developed silica@zirconia NPs bind as high as 207 mg dNMPs on 1 g of nanocarrier at neutral-physiological pH while maintaining good colloidal stability. We studied the influence of biological buffers and found that while phosphate buffers decrease the loading dramatically, other commonly used buffers, such as HEPES, are compatible with the nanoplatform. We propose the prepared silica@zirconia NPs as promising carriers for nucleic acid-type drug cargos.}},
  articleno    = {{2166}},
  author       = {{Naszalyi Nagy, Livia and Dhaene, Evert and Van Zele, Matthias and Mihály, Judith and Klébert, Szilvia and Varga, Zoltán and Kövér, Katalin E. and De Buysser, Klaartje and Van Driessche, Isabel and Martins, José and Fehér, Krisztina}},
  issn         = {{2079-4991}},
  journal      = {{NANOMATERIALS}},
  keywords     = {{General Materials Science,General Chemical Engineering,nanocarrier,nanoparticle,age-dependent adsorption,Langmuir isotherm,deoxynucleoside monophosphate,silica@zirconia,core@shell,solution NMR,buffer interference with adsorption,ADSORPTION,ZRO2,NANOCARRIERS,NUCLEOSIDES,DISSOLUTION,ADJUVANTS,VACCINES,SPHERES,CO2}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{22}},
  title        = {{Silica@zirconia core@shell nanoparticles for nucleic acid building block sorption}},
  url          = {{http://dx.doi.org/10.3390/nano11092166}},
  volume       = {{11}},
  year         = {{2021}},
}
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