@inbook{678d05f5f1ab4868bdc69a87ee863344,
title = "Multiplex Imaging of Rho GTPase Activities in Living Cells",
abstract = "F{\"o}rster resonance energy transfer (FRET) biosensors are popular and useful for directly observing cellular signaling pathways in living cells. Until recently, multiplex imaging of genetically encoded FRET biosensors to simultaneously monitor several protein activities in one cell was limited due to a lack of spectrally compatible FRET pair of fluorescent proteins. With the recent development of miRFP series of near-infrared (NIR) fluorescent proteins, we are now able to extend the spectrum of FRET biosensors beyond blue-green-yellow into NIR. These new NIR FRET biosensors enable direct multiplex imaging together with commonly used cyan-yellow FRET biosensors. We describe herein a method to produce cell lines harboring two compatible FRET biosensors. We will then discuss how to directly multiplex-image these FRET biosensors in living cells. The approaches described herein are generally applicable to any combinations of genetically encoded, ratiometric FRET biosensors utilizing the cyan-yellow and NIR fluorescence.",
keywords = "FRET biosensor, Multiplex imaging, Near-infrared fluorescent protein, Rho GTPases",
author = "Bhalla, {Ravi M.} and Maren H{\"u}lsemann and Verkhusha, {Polina V.} and Walker, {Myla G.} and Shcherbakova, {Daria M.} and Louis Hodgson",
note = "Funding Information: This work was supported by National Institutes of Health grant GM136226 to LH. LH is an Irma T. Hirschl Career Scientist. RMB was supported by the Mamaroneck High School Original Science Research Program. MGW was supported by the Einstein-Montefiore Summer High School Research Program of the Albert Einstein College of Medicine, Graduate Division of Biomedical Sciences. NIR-Rac1 FRET biosensor was originally engineered, in part, by contributions from Tsipora M. Huisman, MD, and Natasha Cox Cammer [1]. Biosensor cDNA constructs and Matlab codes to enable processing of FRET data are available upon request. Publisher Copyright: {\textcopyright} 2021, Springer Science+Business Media, LLC, part of Springer Nature.",
year = "2021",
doi = "10.1007/978-1-0716-1593-5_4",
language = "English (US)",
series = "Methods in Molecular Biology",
publisher = "Humana Press Inc.",
pages = "43--68",
booktitle = "Methods in Molecular Biology",
}