Rapid hyperosmotic coinduction of two tilapia (Oreochromis mossambicus) transcription factors in gill cells.

@article{Fiol2005RapidHC,
  title={Rapid hyperosmotic coinduction of two tilapia (Oreochromis mossambicus) transcription factors in gill cells.},
  author={D. Fiol and D. K{\"u}ltz},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2005},
  volume={102 3},
  pages={
          927-32
        }
}
  • D. Fiol, D. Kültz
  • Published 2005
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
Gills of euryhaline teleosts are excellent models for studying osmotic-stress adaptation because they directly contact the aquatic environment and are an important effector tissue during osmotic stress. We acclimated tilapia (Oreochromis mossambicus) from fresh water (FW) to seawater (SW); performed suppression subtractive hybridization of gill mRNAs; and identified two transcription factors, osmotic stress transcription factor 1 (OSTF1) and the tilapia homolog of transcription factor II B… Expand
Hyperosmotic shock adaptation by cortisol involves upregulation of branchial osmotic stress transcription factor 1 gene expression in Mozambique Tilapia.
TLDR
Overall, cortisol adaptstilapia to a hyperosmotic shock associated with abrupt seawater exposure, which involves upregulation of OSTF1 gene expression and a concomitant suppression of branchial metabolism in tilapia. Expand
Regulation of osmotic stress transcription factor 1 (Ostf1) in tilapia (Oreochromis mossambicus) gill epithelium during salinity stress
TLDR
It is concluded that Ostf1 induction in gill epithelial cells of tilapia exposed to salinity stress is independent of cortisol or other systemic factors, depends on hypertonicity as the signal, and is based on transient mRNA stabilization. Expand
The role of osmotic stress transcription factor 1 in fishes
  • W. K. Tse
  • Biology, Medicine
  • Frontiers in Zoology
  • 2014
TLDR
A decade has passed since the discovery of Ostf1, and it is a good time to summarize the current understanding of this gene and cover and summarizes the findings from different fishes, and provides a perspective for future Ost f1 studies. Expand
Acute salinity challenges in Mozambique and Nile tilapia: differential responses of plasma prolactin, growth hormone and branchial expression of ion transporters.
TLDR
The responses of Mozambique and Nile tilapia acclimated to fresh water and brackish water were compared following acute salinity challenges and the difference in the SW adaptability of these species may be related to a limited capacity of Nile tilas to up-regulate NKCC gene expression, which is likely to be an essential component in the recruitment of SW-type chloride cells. Expand
NFAT5 genes are part of the osmotic regulatory system in Atlantic salmon (Salmo salar)
TLDR
This study identifies 4 nuclear factor of activated T cells (NFAT5, an osmotic stress transcription factor) paralogues in Atlantic salmon, which showed strong homology in characterized functional domains with those identified in other vertebrates. Expand
An osmolality/salinity-responsive enhancer 1 (OSRE1) in intron 1 promotes salinity induction of tilapia glutamine synthetase
TLDR
It is shown that hyperosmotic induction of glutamine synthetase represents a prominent part of this switch between hyper- and hypo-osmoregulation in Euryhaline tilapia, and that proper intron 1 positioning and the presence of an OSRE1 in introns 1 are required for precise enhancement of hyperosMotic glutamine Synthetase expression. Expand
Dynamics of Gene Expression Responses for Ion Transport Proteins and Aquaporins in the Gill of a Euryhaline Pupfish during Freshwater and High-Salinity Acclimation
TLDR
Insight is offered into how coordinated transcriptional responses for ion transporters in the gill facilitate reestablishment of osmotic homeostasis after changes in environmental salinity and evidence that the teleost gill expresses two Na+-HCO3− cotransporter-1 isoforms with different roles in freshwater and seawater acclimation is provided. Expand
Transcriptional responses of the black-chinned tilapia Sarotherodon melanotheron to salinity extremes.
TLDR
In fish acclimated to both salinity extremes, the functional category of cellular process was the predominant one, which may indicate high cellular turnover rates in FW and HSW-adapted fish. Expand
COX2 in a euryhaline teleost, Fundulus heteroclitus: primary sequence, distribution, localization, and potential function in gills during salinity acclimation
TLDR
It is suggested that constitutive branchial COX2 expression is enhanced in seawater, where prostaglandins can regulate NaCl secretion in chloride cells, and may play a role in cell survival during acute osmotic shock. Expand
Medaka osmotic stress transcription factor 1b (Ostf1b/TSC22D3-2) triggers hyperosmotic responses of different ion transporters in medaka gill and human embryonic kidney cells via the JNK signalling pathway.
TLDR
Results indicated that Ostf1b is a downstream target of SEK and JNK and exerts a positive feedback loop on the JNK signalling pathway via activation of GCK and/or MLK3 proteins, suggesting the role of Ostf 1b in modulation of critical water channel/ion transporters during osmotic stress. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 34 REFERENCES
Glucocorticoid receptor upregulation during seawater adaptation in a euryhaline teleost, the tilapia (Oreochromis mossambicus).
TLDR
It appears that an increase in cortisol receptors, which is closely associated with the rise in blood osmotic pressure that accompanies SW exposure, is an important component of cortisol's ability to promote SW adaptation in the tilapia. Expand
The significance of cortisol for osmoregulation in carp (Cyprinus carpio) and tilapia (Sarotherodon mossambicus).
TLDR
The effects of cortisol on electrolyte concentrations during acclimation and on Na+-K+-ATPase activity differed in both types of fish and the significance of these cortisol effects is discussed. Expand
Osmotic and thermal effects on in situ ATPase activity in permeabilized gill epithelial cells of the fish Gillichthys mirabilis
  • KÜLtz, Somero
  • Biology, Medicine
  • The Journal of experimental biology
  • 1995
TLDR
Using a new method, which is based on the formation of plasma membrane channels by alamethicin, gill cells were permeabilized, suggesting a localization of H+-ATPase in pavement cells. Expand
Branchial expression of an aquaporin 3 (AQP-3) homologue is downregulated in the European eel Anguilla anguilla following seawater acclimation.
TLDR
Quantitative studies demonstrated that, following the 3-week acclimation of freshwater-adapted yellow and silver eels to seawater (SW), transcript abundance in the gill was reduced by 76% and 97%, respectively, and the half time of branchial AQP-3 mRNA downregulation in yellow eels was approximately 10 h. Expand
Expression and heat‐responsive regulation of a TFIIB homologue from the archaeon Haloferax volcanii
TLDR
Using an in vivo transcription termination assay, it is demonstrated that this T‐rich element can function as a sequence‐dependent transcription terminator, which may serve to downregulate expression of the tfb2 gene under both non‐heat shock and heat shock conditions. Expand
Partial cloning of the hormone-binding domain of the cortisol receptor in tilapia, Oreochromis mossambicus, and changes in the mRNA level during embryonic development.
TLDR
During early development of tilapia, the highest concentration of receptor mRNA in the total RNA extracted from the whole egg was found just after fertilization, and its concentration decreased steadily toward hatching, while the absolute amount of receptor RNA per egg increased gradually before the initiation of cortisol production by the embryo. Expand
Environmental stressors and gene responses
TLDR
The molecular biological approach to understanding freezing-tolerance in the model plant, Arabidopsis thaliana and the effects of bioenergetic stress and redox balance on the expression of genes critical to mitochondrial function are described. Expand
TonEBP transcriptional activator in the cellular response to increased osmolality
TLDR
TonEBP plays a significant role in immunity by stimulating several cytokine genes in the T-cells by regulating changes in diuretic status mainly at the level of nucleocytoplasmic distribution. Expand
Osmotic regulation of gene expression
  • M. Burg, E. D. Kwon, D. Kültz
  • Biology, Medicine
  • FASEB journal : official publication of the Federation of American Societies for Experimental Biology
  • 1996
TLDR
This work focuses on the molecular basis for osmotic regulation of gene expression, emphasizing certain genes expressed in bacteria, yeast, and the mammalian renal medulla because their expression is best understood. Expand
Dynamics of Na(+),K(+),2Cl(-) cotransporter and Na(+),K(+)-ATPase expression in the branchial epithelium of brown trout (Salmo trutta) and Atlantic salmon (Salmo salar).
TLDR
The study demonstrates the coordinated regulation of NKCC and NKA proteins in the gill during salinity shifts and parr-smolt transformation of salmonids. Expand
...
1
2
3
4
...