Insights on the mechanism of formation of protein microspheres in a biphasic system.

Abstract:

:Microspheres of bovine serum albumin (BSA) and silk fibroin are produced by applying ultrasound in a biphasic system consisting of an aqueous protein solution and an organic solvent. The protein microspheres are dispersed in an aqueous media where the protein remains at the interface covering the organic solvent. This only occurs when high shear forces are applied that induce changes to force the protein to the interface. Fourier transform infrared results indicate a large increase in the content of the β-sheet during the formation of silk fibroin microspheres. Molecular dynamics simulations show a clear adaption on the 3D structure of BSA when stabilized at the interface, without major changes in secondary structure. Further studies demonstrate that high water content, oil solvents, and larger peptides with separated and clear hydrophobic and hydrophilic areas lead to more stable and smaller spheres. This is the first time that these results are presented. We also present herein the rationale to produce tailored protein microspheres with a controlled size, controlled charge, and increased stability.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Silva R,Ferreira H,Azoia NG,Shimanovich U,Freddi G,Gedanken A,Cavaco-Paulo A

doi

10.1021/mp3001827

subject

Has Abstract

pub_date

2012-11-05 00:00:00

pages

3079-88

issue

11

eissn

1543-8384

issn

1543-8392

journal_volume

9

pub_type

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