ZFIN ID: ZDB-PUB-101201-52
Generation of a non-leaky heat shock-inducible Cre line for conditional Cre/lox strategies in zebrafish
Hans, S., Freudenreich, D., Geffarth, M., Kaslin, J., Machate, A., and Brand, M.
Date: 2011
Source: Developmental dynamics : an official publication of the American Association of Anatomists   240(1): 108-115 (Journal)
Registered Authors: Brand, Michael, Freudenreich, Dorian, Geffarth, Michaela, Hans, Stefan, Kaslin, Jan, Machate, Anja
Keywords: zebrafish, recombination, Cre/lox, CreERT2, Tamoxifen, heat shock, promoter
MeSH Terms:
  • Animals
  • Animals, Genetically Modified
  • Embryo, Nonmammalian
  • Female
  • Gene Expression Regulation, Developmental/genetics
  • Gene Transfer Techniques*
  • Genes, Reporter/genetics
  • Genetic Vectors/genetics*
  • Green Fluorescent Proteins/genetics
  • Green Fluorescent Proteins/metabolism
  • HSP70 Heat-Shock Proteins/genetics
  • Hot Temperature*
  • Integrases/genetics*
  • Male
  • Models, Biological
  • Promoter Regions, Genetic/genetics
  • Receptors, Estrogen/genetics
  • Receptors, Estrogen/metabolism
  • Recombinant Fusion Proteins/genetics
  • Recombinant Fusion Proteins/metabolism
  • Transcriptional Activation/physiology*
  • Transgenes/genetics
  • Transgenes/physiology
  • Zebrafish/embryology
  • Zebrafish/genetics*
PubMed: 21117149 Full text @ Dev. Dyn.
Cre-mediated site-specific recombination has emerged as an indispensable tool for the precise manipulation of the mammalian genome. Recently, we showed that Cre is also highly efficient in zebrafish and temporal control of recombination can be achieved by using the ligand-inducible CreER(T2). Previous attempts have been made to control recombination by using the temperature inducible hsp70l promoter to conditionally drive the expression of Cre or EGFP-Cre, respectively. However, in this study we demonstrate that the hsp70l promoter possesses a basal leakiness resulting in Cre-mediated recombination even at permissive temperatures. In order to prevent non-conditional recombination, we combined the hsp70l promoter with a mCherry-tagged ligand-inducible CreER(T2). At permissive temperatures and in the absence of the ligand tamoxifen (TAM), no non-conditional recombination is observed indicating tight regulation of CreER(T2). Instead, comprehensive site-specific recombination is mediated following heat induction and administration of TAM.