Tracking cells in GFP-transgenic zebrafish using the photoconvertible PSmOrange system

• Verfasst von: Beretta, Carlo Antonio [VerfasserIn]
• Verfasst von: Dross, Nicolas [VerfasserIn]
• Verfasst von: Engel, Ulrike [VerfasserIn]
• Verfasst von: Carl, Matthias [VerfasserIn]
• Titel: Tracking cells in GFP-transgenic zebrafish using the photoconvertible PSmOrange system
• Verf.angabe: Carlo A. Beretta, Nicolas Dross, Ulrike Engel, Matthias Carl
• E-Jahr: 2016
• Jahr: 2/05/2016
• Umfang: 1 Online-Ressource (1 Videodatei, 8:00 min)
• Illustrationen: farbig
• Fussnoten: Enthält auch Textversion "Tracking cells in GFP-transgenic zebrafish using the photoconvertible PSmOrange system" als PDF, 7 Seiten ; Gesehen am 25.04.2019 ; Wissenschaftlicher Film. Deutschland. 2016
• Titel Quelle: Enthalten in: JoVE. Video journal
• Ort Quelle: [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar], 2006
• Jahr Quelle: 2016
• Band/Heft Quelle: (2016,108) Artikel-Nummer e53604, 7 Seiten
• ISSN Quelle: 1940-087X
• DOI: doi:10.3791/53604
• Datenträger: Online-Ressource
• Dokumenttyp: Film
• Sprache: eng
• K10plus-PPN: 166359936X

Abstract

The rapid development of transparent zebrafish embryos (Danio rerio) in combination with fluorescent labelings of cells and tissues allows visualizing developmental processes as they happen in the living animal. Cells of interest can be labeled by using a tissue specific promoter to drive the expression of a fluorescent protein (FP) for the generation of transgenic lines. Using fluorescent photoconvertible proteins for this purpose additionally allows to precisely follow defined structures within the expression domain. Illuminating the protein in the region of interest, changes its emission spectrum and highlights a particular cell or cell cluster leaving other transgenic cells in their original color. A major limitation is the lack of known promoters for a large number of tissues in the zebrafish. Conversely, gene- and enhancer trap screens have generated enormous transgenic resources discretely labeling literally all embryonic structures mostly with GFP or to a lesser extend red or yellow FPs. An approach to follow defined structures in such transgenic backgrounds would be to additionally introduce a ubiquitous photoconvertible protein, which could be converted in the cell(s) of interest. However, the photoconvertible proteins available involve a green and/or less frequently a red emission state1 and can therefore often not be used to track cells in the FP-background of existing transgenic lines. To circumvent this problem, we have established the PSmOrange system for the zebrafish2,3. Simple microinjection of synthetic mRNA encoding a nuclear form of this protein labels all cell nuclei with orange/red fluorescence. Upon targeted photoconversion of the protein, it switches its emission spectrum to far red. The quantum efficiency and stability of the protein makes PSmOrange a superb cell-tracking tool for zebrafish and possibly other teleost species.