fulltext.study @t Gmail

Effect of tissue scaffold topography on protein structure monitored by fluorescence spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
23068 43415 2014 9 PDF Available
Title
Effect of tissue scaffold topography on protein structure monitored by fluorescence spectroscopy
Abstract

•Fluorescence monitors the impact of scaffold topography on structure and mobility of the adsorbed proteins.•Globular proteins structural spreading at flat surfaces is observed by a maximum emission red shift.•Aligned nano-patterned and flat surfaces led to a high restriction of tryptophans mobility.•Anisotropy decrease is associated to an increased tryptophan mobility reflecting the ability of rod-shape proteins to fit curved surfaces.•The increased tryptophan mobility correlates to higher accessibility of cells to protein binding sites.

The impact of surface topography on the structure of proteins upon adhesion was assessed through non-invasive fluorescence monitoring. This study aimed at obtaining a better understanding about the role of protein structural status on cell–scaffold interactions. The changes induced upon adsorption of two model proteins with different geometries, trypsin (globular conformation) and fibrinogen (rod-shaped conformation) on poly-l-lactic acid (PLLA) scaffolds with different surface topographies, flat, fibrous and surfaces with aligned nanogrooves, were assessed by fluorescence spectroscopy monitoring, using tryptophan as structural probe. Hence, the maximum emission blue shift and the increase of fluorescence anisotropy observed after adsorption of globular and rod-like shaped proteins on surfaces with parallel nanogrooves were ascribed to more intense protein–surface interactions. Furthermore, the decrease of fluorescence anisotropy observed upon adsorption of proteins to scaffolds with fibrous morphology was more significant for rod-shaped proteins. This effect was associated to the ability of these proteins to adjust to curved surfaces. The additional unfolding of proteins induced upon adsorption on scaffolds with a fibrous morphology may be the reason for better cell attachment there, promoting an easier access of cell receptors to initially hidden protein regions (e.g. RGDS sequence), which are known to have a determinant role in cell attaching processes.

Keywords
Tissue scaffold; Protein adhesion; Protein conformation; Surface topography; Fluorescence emission
First Page Preview
Effect of tissue scaffold topography on protein structure monitored by fluorescence spectroscopy
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 189, 10 November 2014, Pages 166–174
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us