EPFL | Biomedical Imaging Group

Nanometric Axial Resolution of Fibronectin Assembly Units Achieved with an Efficient Reconstruction Approach for Multi-Angle-TIRF Microscopy

E. Soubies, A. Radwanska, D. Grall, L. Blanc-Féraud, E. Van Obberghen-Schilling, S. Schaub

Scientific Reports, vol. 9, no. 1926, pp. 1–10, February 13, 2019.

High resolution imaging of molecules at the cell-substrate interface is required for understanding key biological processes. Here we propose a complete pipeline for multi-angle total internal reflection fluorescence microscopy (MA-TIRF) going from instrument design and calibration procedures to numerical reconstruction. Our custom setup is endowed with a homogeneous field illumination and precise excitation beam angle. Given a set of MA-TIRF acquisitions, we deploy an efficient joint deconvolution/reconstruction algorithm based on a variational formulation of the inverse problem. This algorithm offers the possibility of using various regularizations and can run on graphics processing unit (GPU) for rapid reconstruction. Moreover, it can be easily used with other MA-TIRF devices and we provide it as an open-source software. This ensemble has enabled us to visualize and measure with unprecedented nanometric resolution, the depth of molecular components of the fibronectin assembly machinery at the basal surface of endothelial cells.

@ARTICLE(http://bigwww.epfl.ch/publications/soubies1901.html,
AUTHOR="Soubies, E. and Radwanska, A. and Grall, D. and
	Blanc-F{\'{e}}raud, L. and Van Obberghen-Schilling, E. and Schaub,
	S.",
TITLE="Nanometric Axial Resolution of Fibronectin Assembly Units
	Achieved with an Efficient Reconstruction Approach for
	Multi-Angle-{TIRF} Microscopy",
JOURNAL="Scientific Reports",
YEAR="2019",
volume="9",
number="1926",
pages="1--10",
month="February 13,",
note="")

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