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Proceedings Paper

Quantifying the surface chemistry of 3D matrices in situ
Author(s): Dimitrios S. Tzeranis; Peter T. C. So; Ioannis V. Yannas
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Paper Abstract

Despite the major role of the matrix (the insoluble environment around cells) in physiology and pathology, there are very few and limited methods that can quantify the surface chemistry of a 3D matrix such as a biomaterial or tissue ECM. This study describes a novel optical-based methodology that can quantify the surface chemistry (density of adhesion ligands for particular cell adhesion receptors) of a matrix in situ. The methodology utilizes fluorescent analogs (markers) of the receptor of interest and a series of binding assays, where the amount of bound markers on the matrix is quantified via spectral multi-photon imaging. The study provides preliminary results for the quantification of the ligands for the two major collagen-binding integrins (α1β1, α2β1) in porous collagen scaffolds that have been shown to be able to induce maximum regeneration in transected peripheral nerves. The developed methodology opens the way for quantitative descriptions of the insoluble microenvironment of cells in physiology and pathology, and for integrating the matrix in quantitative models of cell signaling. α

Paper Details

Date Published: 5 March 2014
PDF: 6 pages
Proc. SPIE 8956, Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications VI, 89560L (5 March 2014); doi: 10.1117/12.2038664
Show Author Affiliations
Dimitrios S. Tzeranis, Massachusetts Institute of Technology (United States)
Peter T. C. So, Massachusetts Institute of Technology (United States)
Ioannis V. Yannas, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 8956:
Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications VI
Samuel Achilefu; Ramesh Raghavachari, Editor(s)

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