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J. Funct. Biomater. 2015, 6(2), 171-191; doi:10.3390/jfb6020171

Carbohydrate-Derived Amphiphilic Macromolecules: A Biophysical Structural Characterization and Analysis of Binding Behaviors to Model Membranes

1
Department of Pharmacology, Rutgers University, Piscataway, 675 Hoes Lane, Piscataway, NJ 08854, USA
2
Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, NJ 08854, USA
3
Department of Chemical and Biochemical Engineering, Rutgers University, 599 Taylor Road, Piscataway, NJ 08854, USA
4
New Jersey Center for Biomaterials, 145 Bevier Road, Piscataway, NJ 08854, USA
5
Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, USA
6
OIRT/High Performance and Research Computing, 185 S. Orange Avenue, Newark, NJ 07103, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Francesco Puoci
Received: 3 February 2015 / Revised: 28 March 2015 / Accepted: 30 March 2015 / Published: 8 April 2015
(This article belongs to the Special Issue Feature Papers)
View Full-Text   |   Download PDF [4464 KB, uploaded 8 April 2015]   |  

Abstract

The design and synthesis of enhanced membrane-intercalating biomaterials for drug delivery or vascular membrane targeting is currently challenged by the lack of screening and prediction tools. The present work demonstrates the generation of a Quantitative Structural Activity Relationship model (QSAR) to make a priori predictions. Amphiphilic macromolecules (AMs) “stealth lipids” built on aldaric and uronic acids frameworks attached to poly(ethylene glycol) (PEG) polymer tails were developed to form self-assembling micelles. In the present study, a defined set of novel AM structures were investigated in terms of their binding to lipid membrane bilayers using Quartz Crystal Microbalance with Dissipation (QCM-D) experiments coupled with computational coarse-grained molecular dynamics (CG MD) and all-atom MD (AA MD) simulations. The CG MD simulations capture the insertion dynamics of the AM lipophilic backbones into the lipid bilayer with the PEGylated tail directed into bulk water. QCM-D measurements with Voigt viscoelastic model analysis enabled the quantitation of the mass gain and rate of interaction between the AM and the lipid bilayer surface. Thus, this study yielded insights about variations in the functional activity of AM materials with minute compositional or stereochemical differences based on membrane binding, which has translational potential for transplanting these materials in vivo. More broadly, it demonstrates an integrated computational-experimental approach, which can offer a promising strategy for the in silico design and screening of therapeutic candidate materials. View Full-Text
Keywords: amphiphilic macromolecule; membrane lipid bilayers; quartz crystal microbalance with dissipation (QCM-D); molecular dynamics simulations; quantitative structure-activity relationship (QSAR) model amphiphilic macromolecule; membrane lipid bilayers; quartz crystal microbalance with dissipation (QCM-D); molecular dynamics simulations; quantitative structure-activity relationship (QSAR) model
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Martin, A.A.T.; Tomasini, M.; Kholodovych, V.; Gu, L.; Sommerfeld, S.D.; Uhrich, K.E.; Murthy, N.S.; Welsh, W.J.; Moghe, P.V. Carbohydrate-Derived Amphiphilic Macromolecules: A Biophysical Structural Characterization and Analysis of Binding Behaviors to Model Membranes. J. Funct. Biomater. 2015, 6, 171-191.

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