Understanding the Structural Differences between Spherical and Rod-Shaped Human Insulin Nanoparticles Produced by Supercritical Fluids Precipitation

Title
Understanding the Structural Differences between Spherical and Rod-Shaped Human Insulin Nanoparticles Produced by Supercritical Fluids Precipitation
Authors
정회일
Keywords
2D correlation spectroscopy; insulin nanoparticles; molecular dynamics simulation; protein structure; solution-enhanced dispersion by supercritical fluids process
Issue Date
2015-02
Publisher
WILEY-V C H VERLAG GMBH
Citation
CHEMPHYSCHEM, v. 16, NO 2, Page. 476-482
Abstract
In this study, the thermal denaturation mechanism and secondary structures of two types of human insulin nanoparticles produced by a process of solution-enhanced dispersion by supercritical fluids using dimethyl sulfoxide (DMSO) and ethanol (EtOH) solutions of insulin are investigated using spectroscopic approaches and molecular dynamics calculations. First, the temperature-dependent IR spectra of spherical and rod-shaped insulin nanoparticles prepared from DMSO and EtOH solution, respectively, are analyzed using principal component analysis (PCA) and 2D correlation spectroscopy to obtain a deeper understanding of the molecular structures and thermal behavior of the two insulin particle shapes. All-atom molecular dynamics (AAMD) calculations are performed to investigate the influence of the solvent molecules on the production of the insulin nanoparticles and to elucidate the geometric differences between the two types of nanoparticles. The results of the PCA, the 2D correlation spectroscopic analysis, and the AAMD calculations clearly reveal that the thermal denaturation mechanisms and the degrees of hydrogen bonding in the spherical and rod-shaped insulin nanoparticles are different. The polarity of the solvent might not alter the structure or function of the insulin produced, but the solvent polarity does influence the synthesis of different shapes of insulin nanoparticles.
URI
http://onlinelibrary.wiley.com/wol1/doi/10.1002/cphc.201402504/fullhttp://hdl.handle.net/20.500.11754/22325
ISSN
1439-4235; 1439-7641
DOI
http://dx.doi.org/10.1002/cphc.201402504
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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