Quantifying the surface chemistry of 3D matrices in situ

Dimitrios S. Tzeranis; Peter T. C. So; Ioannis V. Yannas

doi:10.1117/12.2038664

5 March 2014 Quantifying the surface chemistry of 3D matrices in situ

Dimitrios S. Tzeranis, Peter T. C. So, Ioannis V. Yannas

Proceedings Volume 8956, Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications VI; 89560L (2014) https://doi.org/10.1117/12.2038664
Event: SPIE BiOS, 2014, San Francisco, California, United States

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

Citation Download Citation

Dimitrios S. Tzeranis, Peter T. C. So, and Ioannis V. Yannas "Quantifying the surface chemistry of 3D matrices in situ", Proc. SPIE 8956, Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications VI, 89560L (5 March 2014); https://doi.org/10.1117/12.2038664

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KEYWORDS

Collagen

Chemistry

Receptors

Matrices

Molecules

Signal detection

Natural surfaces

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