Abstract
Activation of G protein-coupled receptors upon chemoattractant stimulation induces activation of multiple signaling pathways. To fully understand how these signaling pathway coordinates to achieve directional migration of neutrophils, it is essential to determine the dynamics of the spatiotemporal activation profile of signaling components at the level of single living cells. Here, we describe a detailed methodology for monitoring and quantitatively analyzing the spatiotemporal dynamics of 1,4,5-inositol trisphosphate (IP3) in neutrophil-like HL60 cells in response to various chemoattractant fields by applying Förster resonance energy transfer (FRET) fluorescence microscopy.
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Acknowledgments
The authors would like to thank all members of the Chemotaxis Signal Section of the Laboratory of Immunogenetics (CSS/LIG), NIAID, NIH. This research was supported by the Intramural Research Program of the NIH/NIAID. We also thank Gergő Gulyás and Dr. Péter Várnai of Semmelweis University, Budapest, Hungary, for providing IP3 probes for this work.
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Xu, X., Ha, H., Brzostowski, J., **, T. (2024). Quantitative Monitoring of GPCR-Mediated Spatiotemporal IP3 Dynamics Using Confocal Fluorescence Microscopy. In: Kimmel, A.R. (eds) Dictyostelium discoideum. Methods in Molecular Biology, vol 2814. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3894-1_14
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DOI: https://doi.org/10.1007/978-1-0716-3894-1_14
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