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Roberts, S. ; Seeger, M. ; Jiang, Y. ; Mishra, A. ; Sigmund, F. ; Stelzl, A. ; Lauri, A. ; Symvoulidis, P. ; Rolbieski, H.* ; Preller, M.* ; Dean-Ben, X.L. ; Razansky, D. ; Orschmann, T.* ; Desbordes, S.C. ; Vetschera, P.* ; Bach, T.* ; Ntziachristos, V. ; Westmeyer, G.G.

Calcium sensor for photoacoustic imaging.

J. Am. Chem. Soc. 140, 2718-2721 (2018)
Postprint DOI PMC
Open Access Green
We introduce a selective and cell-permeable calcium sensor for photoacoustics (CaSPA), a versatile imaging technique that allows for fast volumetric mapping of photoabsorbing molecules with deep tissue penetration. To optimize for Ca2+-dependent photoacoustic signal changes, we synthesized a selective metallochromic sensor with high extinction coefficient, low quantum yield, and high photobleaching resistance. Micromolar concentrations of Ca2+ lead to a robust blueshift of the absorbance of CaSPA, which translated into an accompanying decrease of the peak photoacoustic signal. The acetoxymethyl esterified sensor variant was readily taken up by cells without toxic effects and thus allowed us for the first time to perform live imaging of Ca2+ fluxes in genetically unmodified cells and heart organoids as well as in zebrafish larval brain via combined fluorescence and photoacoustic imaging.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Arsenazo-iii; Indicators; Microscopy; Ca-2
Language english
Publication Year 2018
Prepublished in Year 2017
HGF-reported in Year 2017
ISSN (print) / ISBN 0002-7863
e-ISSN 1520-5126
Journal Journal of the American Chemical Society
Quellenangaben Volume: 140, Issue: 8, Pages: 2718-2721 Article Number: , Supplement: ,
Publisher American Chemical Society (ACS)
Publishing Place Washington
Reviewing status Peer reviewed
Institute(s) Institute of Biological and Medical Imaging (IBMI)
Institute of Developmental Genetics (IDG)
POF-Topic(s) 30505 - New Technologies for Biomedical Discoveries
30502 - Diabetes: Pathophysiology, Prevention and Therapy
30205 - Bioengineering and Digital Health
30204 - Cell Programming and Repair
Research field(s) Enabling and Novel Technologies
Genetics and Epidemiology
PSP Element(s) G-552000-001
G-552000-002
G-505500-001
G-505590-001
G-500591-001
G-500500-001
G-500500-006
DOI 10.1021/jacs.7b03064
WOS ID WOS:000426617700003
PubMed ID 28945084
Erfassungsdatum 2017-10-11
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