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|Title:||Arbitrary-Region Raster Image Correlation Spectroscopy||Authors:||Hendrix, Jelle
Lamb, Don C.
|Issue Date:||2016||Publisher:||CELL PRESS||Source:||BIOPHYSICAL JOURNAL, 111(8), p. 1785-1796||Abstract:||Combining imaging with correlation spectroscopy, as in raster image correlation spectroscopy (RICS), makes it possible to extract molecular translational diffusion constants and absolute concentrations, and determine intermolecular interactions from single-channel or multicolor confocal laser-scanning microscopy (CLSM) images. Region-specific RICS analysis remains very challenging because correlations are always calculated in a square region-of-interest (ROI). In this study, we describe a generalized image correlation spectroscopy algorithm that accepts arbitrarily shaped ROIs. We show that an image series can be cleaned up before arbitrary-region RICS (ARICS) analysis. We demonstrate the power of ARICS by simultaneously measuring molecular mobility in the cell membrane and the cytosol. Mobility near dynamic subcellular structures can be investigated with ARICS by generating a dynamic ROI. Finally, we derive diffusion and concentration pseudo-maps using the ARICS method. ARICS is a powerful expansion of image correlation spectroscopy with the potential of becoming the new standard for extracting biophysical parameters from confocal fluorescence images.||Notes:||[Hendrix, Jelle] Katholieke Univ Leuven, Lab Photochem & Spect, Div Mol Imaging & Photon, Leuven, Belgium. [Dekens, Tomas] Vrije Univ Brussel, Dept ETRO, Brussels, Belgium. [Dekens, Tomas] iMinds Vzw, Zwijnaarde, Belgium. [Schrimpf, Waldemar; Lamb, Don C.] Univ Munich, Dept Chem, Munich, Germany. [Hendrix, Jelle] Hasselt Univ, Fac Med & Life Sci, Diepenbeek, Belgium. [Hendrix, Jelle] Hasselt Univ, Biomed Res Inst, Diepenbeek, Belgium.||Document URI:||http://hdl.handle.net/1942/22748||ISSN:||0006-3495||e-ISSN:||1542-0086||DOI:||10.1016/j.bpj.2016.09.012||ISI #:||000386315900022||Rights:||(c) 2016 Biophysical Society. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).||Category:||A1||Type:||Journal Contribution||Validations:||ecoom 2017|
|Appears in Collections:||Research publications|
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