PMID- 38386424 OWN - NLM STAT- MEDLINE DCOM- 20240307 LR - 20240307 IS - 1944-8252 (Electronic) IS - 1944-8244 (Linking) VI - 16 IP - 9 DP - 2024 Mar 6 TI - Targeted Single Particle Tracking with Upconverting Nanoparticles. PG - 11217-11227 LID - 10.1021/acsami.3c17116 [doi] AB - Single particle tracking (SPT) is a powerful technique for real-time microscopic visualization of the movement of individual biomolecules within or on the surface of living cells. However, SPT often suffers from the suboptimal performance of the photon-emitting labels used to tag the biomolecules of interest. For example, fluorescent dyes have poor photostability, while quantum dots suffer from blinking that hampers track acquisition and interpretation. Upconverting nanoparticles (UCNPs) have recently emerged as a promising anti-Stokes luminescent label for SPT. In this work, we demonstrated targeted SPT using UCNPs. For this, we synthesized 30 nm diameter doped UCNPs and coated them with amphiphilic polymers decorated with polyethylene glycol chains to make them water-dispersible and minimize their nonspecific interactions with cells. Coated UCNPs highly homogeneous in brightness (as confirmed by a single particle investigation) were functionalized by immunoglobulin E (IgE) using a biotin-streptavidin strategy. Using these IgE-UCNP SPT labels, we tracked high-affinity IgE receptors (FcepsilonRI) on the membrane of living RBL-2H3 mast cells at 37 degrees C in the presence and absence of antigen and obtained good agreement with the literature. Moreover, we used the FcepsilonRI-IgE receptor-antibody system to directly compare the performance of UCNP-based SPT labels to organic dyes (AlexaFluor647) and quantum dots (QD655). Due to their photostability as well as their backgroundless and continuous luminescence, SPT trajectories obtained with UCNP labels are no longer limited by the photophysics of the label but only by the dynamics of the system and, in particular, the movement of the label out of the field of view and/or focal plane. FAU - Dukhno, Oleksii AU - Dukhno O AUID- ORCID: 0000-0001-6860-7042 AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. FAU - Ghosh, Srijayee AU - Ghosh S AUID- ORCID: 0000-0003-2869-1993 AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. FAU - Greiner, Vanille AU - Greiner V AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. FAU - Bou, Sophie AU - Bou S AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. FAU - Godet, Julien AU - Godet J AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. AD - IMAGeS team at ICube, UMR 7357, CNRS, Universite de Strasbourg, Strasbourg 67000, France. FAU - Muhr, Verena AU - Muhr V AD - Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany. FAU - Buchner, Markus AU - Buchner M AD - Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany. FAU - Hirsch, Thomas AU - Hirsch T AD - Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany. FAU - Mely, Yves AU - Mely Y AUID- ORCID: 0000-0001-7328-8269 AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. FAU - Przybilla, Frederic AU - Przybilla F AUID- ORCID: 0009-0009-2016-353X AD - Laboratory of Biomaging and Pathologies, UMR 7021 CNRS, University of Strasbourg, Strasbourg 67000, France. LA - eng PT - Journal Article DEP - 20240222 PL - United States TA - ACS Appl Mater Interfaces JT - ACS applied materials & interfaces JID - 101504991 RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Single Molecule Imaging MH - *Nanoparticles/ultrastructure MH - *Quantum Dots MH - Luminescence MH - Immunoglobulin E OTO - NOTNLM OT - high-affinity IgE receptor OT - nanoparticles OT - single particle tracking OT - single-molecule microscopy OT - upconversion EDAT- 2024/02/22 18:41 MHDA- 2024/03/07 06:42 CRDT- 2024/02/22 12:03 PHST- 2024/03/07 06:42 [medline] PHST- 2024/02/22 18:41 [pubmed] PHST- 2024/02/22 12:03 [entrez] AID - 10.1021/acsami.3c17116 [doi] PST - ppublish SO - ACS Appl Mater Interfaces. 2024 Mar 6;16(9):11217-11227. doi: 10.1021/acsami.3c17116. Epub 2024 Feb 22.