Journal
DEVELOPMENT
Volume 138, Issue 1, Pages 169-177Publisher
COMPANY OF BIOLOGISTS LTD
DOI: 10.1242/dev.059345
Keywords
Transgenesis; ubiquitin promoter; creER; loxP; Zebrafish
Categories
Funding
- EMBO
- HFSP
- National Institutes of Health [5T32CA09172-34, 5PO1HL32262-28]
- Heart and Stroke Foundation of Canada
- Canadian Institutes of Health Research
- NATIONAL CANCER INSTITUTE [T32CA009172] Funding Source: NIH RePORTER
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [P01HL032262] Funding Source: NIH RePORTER
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Molecular genetics approaches in zebrafish research are hampered by the lack of a ubiquitous transgene driver element that is active at all developmental stages. Here, we report the isolation and characterization of the zebrafish ubiquitin (ubi) promoter, which drives constitutive transgene expression during all developmental stages and analyzed adult organs. Notably, ubi expresses in all blood cell lineages, and we demonstrate the application of ubi-driven fluorophore transgenics in hematopoietic transplantation experiments to assess true multilineage potential of engrafted cells. We further generated transgenic zebrafish that express ubiquitous 4-hydroxytamoxifen-controlled Cre recombinase activity from a ubi:cre(ERt2) transgene, as well as ubi:loxP-EGFP-loxP-mCherry (ubi:Switch) transgenics and show their use as a constitutive fluorescent lineage tracing reagent. The ubi promoter and the transgenic lines presented here thus provide a broad resource and important advancement for transgenic applications in zebrafish.
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