ZFIN ID: ZDB-PUB-000504-2
Heat-inducible expression of a reporter gene detected by transient assay in zebrafish
Adam, A., Bartfai, R., Lele, Z., Krone, P.H., and Orbán, L.
Date: 2000
Source: Experimental cell research   256(1): 282-290 (Journal)
Registered Authors: Adam, Attila, Bartfai, Richard, Krone, Patrick H., Lele, Zsolt, Orban, Laszlo
Keywords: hsp70; whole-mount in situ RNA hybridization; ß-galactosidase assay; Danio rerio; Xenopus laevis; mouse
MeSH Terms:
  • Animals
  • Animals, Genetically Modified
  • Embryo, Nonmammalian
  • Escherichia coli/genetics
  • Gene Expression Regulation*
  • Genes, Reporter*
  • Genetic Vectors
  • HSP70 Heat-Shock Proteins/genetics*
  • Hot Temperature
  • Mice
  • Promoter Regions, Genetic*
  • Regulatory Sequences, Nucleic Acid
  • Xenopus
  • Zebrafish/embryology
  • beta-Galactosidase/genetics*
PubMed: 10739675 Full text @ Exp. Cell Res.
Heat-inducibility of two reporter constructs expressing lacZ gene under the control of mouse and Xenopus hsp70 promoters was tested in zebrafish (Danio rerio) embryos using a transient expression system. Cells expressing beta-galactosidase were stained blue by histochemical staining and their average number per embryo was used as an indicator of the expression level of the reporter gene. Both constructs were heat-inducible in the embryonic tissues and showed similar heat dependence (increasing expression levels from 35-36 degrees C up to 39 degrees C with an apparent decrease at 40 degrees C), resembling that of the zebrafish hsp70 genes. However, their induction kinetics were different, which might be due to differences in their 5' UTRs. Spatial expression patterns of the two hsp/lacZ constructs and an endogenous hsp70 gene were mostly similar on the RNA level. These results indicate that our approach is applicable for in vivo analysis of the heat-shock response and that exogenous heat-shock promoters may be useful for inducible expression of transgenes in fish.