Advanced search
1 file | 3.61 MB

The mechanism of catalase loading into porous vaterite CaCO3 crystals by co-synthesis

(2018) PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 20(13). p.8822-8831
Author
Organization
Abstract
Porous vaterite CaCO3 crystals are nowadays extensively used as high-capacity bio-friendly sacrificial templates for the fabrication of such protein-containing nano- and micro-particles as capsules and beads. The first step in the protein encapsulation is performed through loading of the protein molecules into the crystals. Co-synthesis is one of the most useful and simple methods proven to effectively load crystals with proteins; however, the loading mechanism is still unknown. To understand the mechanism, in this study, we focus on the loading of a model protein catalase into the crystals by means of adsorption into pre-formed crystals (ADS) and co-synthesis (COS). Analysis of the physico-chemical characteristics of the protein in solution and during the loading and simulation of the protein packing into the crystals are performed. COS provides more effective loading than ADS giving protein contents in the crystals of 20.3 and 3.5 w/w%, respectively. Extremely high loading for COS providing a local protein concentration of about 550 mg mL(-1) is explained by intermolecular protein interactions, i.e. formation of protein aggregates induced by CaCl2 during the co-synthesis. This is supported by a lower equilibrium constant obtained for COS (5 x 10(5) M-1) than for ADS (23 x 10(5) M-1), indicating a higher affinity of single protein molecules rather than aggregates to the crystal surface. Fitting the adsorption isotherms by classical adsorption models has shown that the Langmuir and BET models describe the adsorption phenomenon better than the Freundlich model, proving the aggregation in solution followed by adsorption of the aggregates into the crystals. We believe that this study will be useful for protein encapsulation through CaCO3 crystals using the COS method.
Keywords
CALCIUM-CARBONATE MICROPARTICLES, POLYELECTROLYTE MICROCAPSULES, COMPOSITE MICROPARTICLES, PROTEIN ENCAPSULATION, DRUG-DELIVERY, PEG MICROGELS, PARTICLES, NANOPARTICLES, RELEASE, MICROSPHERES

Downloads

  • The mechanism of catalyse loading into porous CaCO3 crystals PCCP-2018 c7cp07836f.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 3.61 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Vikulina, AS, NA Feoktistova, NG Balabushevich, Andre Skirtach, and D Volodkin. 2018. “The Mechanism of Catalase Loading into Porous Vaterite CaCO3 Crystals by Co-synthesis.” Physical Chemistry Chemical Physics 20 (13): 8822–8831.
APA
Vikulina, A., Feoktistova, N., Balabushevich, N., Skirtach, A., & Volodkin, D. (2018). The mechanism of catalase loading into porous vaterite CaCO3 crystals by co-synthesis. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 20(13), 8822–8831.
Vancouver
1.
Vikulina A, Feoktistova N, Balabushevich N, Skirtach A, Volodkin D. The mechanism of catalase loading into porous vaterite CaCO3 crystals by co-synthesis. PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2018;20(13):8822–31.
MLA
Vikulina, AS et al. “The Mechanism of Catalase Loading into Porous Vaterite CaCO3 Crystals by Co-synthesis.” PHYSICAL CHEMISTRY CHEMICAL PHYSICS 20.13 (2018): 8822–8831. Print.
@article{8591419,
  abstract     = {Porous vaterite CaCO3 crystals are nowadays extensively used as high-capacity bio-friendly sacrificial templates for the fabrication of such protein-containing nano- and micro-particles as capsules and beads. The first step in the protein encapsulation is performed through loading of the protein molecules into the crystals. Co-synthesis is one of the most useful and simple methods proven to effectively load crystals with proteins; however, the loading mechanism is still unknown. To understand the mechanism, in this study, we focus on the loading of a model protein catalase into the crystals by means of adsorption into pre-formed crystals (ADS) and co-synthesis (COS). Analysis of the physico-chemical characteristics of the protein in solution and during the loading and simulation of the protein packing into the crystals are performed. COS provides more effective loading than ADS giving protein contents in the crystals of 20.3 and 3.5 w/w\%, respectively. Extremely high loading for COS providing a local protein concentration of about 550 mg mL(-1) is explained by intermolecular protein interactions, i.e. formation of protein aggregates induced by CaCl2 during the co-synthesis. This is supported by a lower equilibrium constant obtained for COS (5 x 10(5) M-1) than for ADS (23 x 10(5) M-1), indicating a higher affinity of single protein molecules rather than aggregates to the crystal surface. Fitting the adsorption isotherms by classical adsorption models has shown that the Langmuir and BET models describe the adsorption phenomenon better than the Freundlich model, proving the aggregation in solution followed by adsorption of the aggregates into the crystals. We believe that this study will be useful for protein encapsulation through CaCO3 crystals using the COS method.},
  author       = {Vikulina, AS and Feoktistova, NA and Balabushevich, NG and Skirtach, Andre and Volodkin, D},
  issn         = {1463-9076},
  journal      = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},
  language     = {eng},
  number       = {13},
  pages        = {8822--8831},
  title        = {The mechanism of catalase loading into porous vaterite CaCO3 crystals by co-synthesis},
  url          = {http://dx.doi.org/10.1039/c7cp07836f},
  volume       = {20},
  year         = {2018},
}

Altmetric
View in Altmetric
Web of Science
Times cited: