|ZFIN ID: ZDB-PUB-200422-8|
Photoconvertible fluorescent proteins: A versatile tool in zebrafish skeletal imaging
Bek, J.W., De Clercq, A., De Saffel, H., Soenens, M., Huysseune, A., Witten, P.E., Coucke, P., Willaert, A.
|Source:||Journal of Fish Biology 98(4): 1007-1017 (Journal)|
|Registered Authors:||Coucke, Paul, Huysseune, Ann, Willaert, Andy, Witten, P. Eckhard|
|Keywords:||Kaede, Photoconvertible fluorescent protein, Zebrafish, osterix, skeletal imaging|
|PubMed:||32242924 Full text @ J. Fish Biol.|
Bek, J.W., De Clercq, A., De Saffel, H., Soenens, M., Huysseune, A., Witten, P.E., Coucke, P., Willaert, A. (2020) Photoconvertible fluorescent proteins: A versatile tool in zebrafish skeletal imaging. Journal of Fish Biology. 98(4):1007-1017.
ABSTRACTOne of the most frequently applied techniques in zebrafish (D. rerio) research is the visualisation or manipulation of specific cell populations using transgenic reporter lines. The generation of these transgenic zebrafish, displaying cell- or tissue- specific expression of frequently used fluorophores such as GFP or mCherry, is relatively easy with modern techniques. Fluorophores with different emission wavelengths and driven by different promoters can be monitored simultaneously in the same animal. Photoconvertible fluorescent proteins (pcFPs) are different from these standard fluorophores because their emission spectrum is changed when exposed to UV-light, a process called photoconversion. Here, we illustrate the benefits and versatility of using pcFPs for both single and dual fluorochrome imaging in zebrafish skeletal research in a previously generated osx:Kaede transgenic line. In this line, Kaede, which is expressed under control of the osterix, otherwise known as sp7, promoter thereby labelling immature osteoblasts, can switch from green to red fluorescence upon irradiation with UV-light. First, we demonstrate that osx:Kaede shows an expression pattern similar to a previously described osx:nuGFP transgenic line in both larval and adult stages, hereby validating the use of this line for the imaging of immature osteoblasts. More in-depth experiments highlight different applications for osx:Kaede, such as lineage tracing and its combined use with in vivo skeletal staining and other transgenic backgrounds. Mineral staining in combination with osx:Kaede confirms osteoblast independent mineralisation of the notochord. Osteoblast lineage tracing reveals migration and dedifferentiation of scleroblasts during fin regeneration. Finally, we show that combining two transgenics, osx:Kaede and osc:GFP with similar emission wavelengths is possible when using a pcFP such as Kaede. This article is protected by copyright. All rights reserved.
ADDITIONAL INFORMATION No data available