Articles by Thibaud Magouroux in JoVE
Harmonic Nanoparticles for Regenerative Research Flavio Ronzoni1, Thibaud Magouroux2, Remi Vernet1, Jérôme Extermann3, Darragh Crotty4, Adriele Prina-Mello5, Daniel Ciepielewski6, Yuri Volkov4, Luigi Bonacina2, Jean-Pierre Wolf2, Marisa Jaconi1 1Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, 2Physics Department, GAP-Biophotonics, University of Geneva, 3Laboratoire d'Optique Biomédicale (LOB), Faculté des Sciences et Techniques de l'Ingénieur, École Polytechnique Fédérale de Lausanne, 4Department of Clinical Medicine, School of Medicine, Trinity College Dublin, 5School of Medicine and CRANN, Trinity College Dublin, 6Nikon AG Instruments Protocol details are provided for in vitro labeling human embryonic stem cells with second harmonic generating nanoparticles. Methodologies for hESC investigation by multi-photon microscopy and their differentiation into cardiac clusters are also presented.
Other articles by Thibaud Magouroux on PubMed
Harmonic Nanocrystals for Biolabeling: a Survey of Optical Properties and Biocompatibility ACS Nano. Mar, 2012 | Pubmed ID: 22324660 Nonlinear optical nanocrystals have been recently introduced as a promising alternative to fluorescent probes for multiphoton microscopy. We present for the first time a complete survey of the properties of five nanomaterials (KNbO(3), LiNbO(3), BaTiO(3), KTP, and ZnO), describing their preparation and stabilization and providing quantitative estimations of their nonlinear optical response. In the light of their prospective use as biological and clinical markers, we assess their biocompatibility on human healthy and cancerous cell lines. Finally, we demonstrate the great potential for cell imaging of these inherently nonlinear probes in terms of optical contrast, wavelength flexibility, and signal photostability.
High-speed Tracking of Murine Cardiac Stem Cells by Harmonic Nanodoublers Small (Weinheim an Der Bergstrasse, Germany). Sep, 2012 | Pubmed ID: 22859385 Potassium niobate nonlinear nanoparticles are used for the first time to monitor the evolution of embryonic stem cells (ESC) by second harmonic microscopy. These particles feature the complete absence of photo-bleaching and unlimited excitation wavelength flexibility. The potential of this approach is made evident for tissue-regeneration studies and applications, by capturing a high-speed movie of ESC-derived cardiomyocytes autonomously beating within a cluster. Time-resolved data are analyzed to retrieve 3D information of the contraction pattern at the cellular level.
Deep UV Generation and Direct DNA Photo-interaction by Harmonic Nanoparticles in Labelled Samples Nanoscale. Mar, 2014 | Pubmed ID: 24477750 A biophotonics approach based on the nonlinear optical process of second harmonic generation is presented and demonstrated on malignant human cell lines labelled by harmonic nanoparticles. The method enables independent imaging and therapeutic action, selecting each modality by simply tuning the excitation laser wavelength from infrared to visible. In particular, the generation of deep ultraviolet radiation at 270 nm allows direct interaction with nuclear DNA in the absence of photosensitizing molecules.