scholarly journals FXYD8, a Novel Regulator of Renal Na+/K+-ATPase in the Euryhaline Teleost, Tetraodon nigroviridis

2017 ◽  
Vol 8 ◽  
Author(s):  
Pei-Jen Wang ◽  
Wen-Kai Yang ◽  
Chia-Hao Lin ◽  
Hau-Hsuan Hwang ◽  
Tsung-Han Lee
Keyword(s):  
Tetraodon Nigroviridis ◽  
Euryhaline Teleost

scholarly journals Branchial FXYD protein expression in response to salinity change and its interaction with Na+/K+-ATPase of the euryhaline teleost Tetraodon nigroviridis

2008 ◽  
Vol 211 (23) ◽  
pp. 3750-3758 ◽  
Author(s):  
P.-J. Wang ◽  
C.-H. Lin ◽  
H.-H. Hwang ◽  
T.-H. Lee
Keyword(s):  
Protein Expression ◽  
Salinity Change ◽  
Tetraodon Nigroviridis ◽  
Euryhaline Teleost

Transcriptome profiling of the gills of a euryhaline teleost fish, Tetraodon nigroviridis, in response to altered calcium concentrations in water

2009 ◽  
Vol 154 (1) ◽  
pp. S2-S3
Author(s):  
P.I.S. Pinto ◽  
D.M. Power ◽  
A.V.M. Canário ◽  
M.A.S. Thorne ◽  
R. Reinhardt ◽  
...  
Keyword(s):  
Teleost Fish ◽  
Transcriptome Profiling ◽  
Tetraodon Nigroviridis ◽  
Euryhaline Teleost

Subfunctionalization of Duplicate mitf Genes Associated With Differential Degeneration of Alternative Exons in Fish

Genetics ◽  
2002 ◽  
Vol 161 (1) ◽  
pp. 259-267 ◽  
Author(s):  
Joachim Altschmied ◽  
Jacqueline Delfgaauw ◽  
Brigitta Wilde ◽  
Jutta Duschl ◽  
Laurence Bouneau ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Evolutionary History ◽  
Single Gene ◽  
Regulatory Elements ◽  
Fugu Rubripes ◽  
Gene Encoding ◽  
Tetraodon Nigroviridis ◽  
Mammalian Lineage ◽  
History Of ◽  
Fish Proteins

Abstract The microphthalmia-associated transcription factor (MITF) exists in at least four isoforms. These are generated in higher vertebrates using alternative 5′ exons and promoters from a single gene. Two separate genes (mitf-m and mitf-b), however, are present in different teleost fish species including the poeciliid Xiphophorus, the pufferfishes Fugu rubripes and Tetraodon nigroviridis, and the zebrafish Danio rerio. Fish proteins MITF-m and MITF-b correspond at both the structural and the expression levels to one particular bird/mammalian MITF isoform. In the teleost lineage subfunctionalization of mitf genes after duplication at least 100 million years ago is associated with the degeneration of alternative exons and, probably, regulatory elements and promoters. For example, a remnant of the first exon specific for MITF-m is detected within the pufferfish gene encoding MITF-b. Retracing the evolutionary history of mitf genes in vertebrates uncovered the differential recruitment of new introns specific for either the teleost or the bird/mammalian lineage.

Intestinal glycyl-L-phenylalanine and L-phenylalanine transport in a euryhaline teleost

1991 ◽  
Vol 260 (3) ◽  
pp. R563-R569 ◽  
Author(s):  
S. J. Reshkin ◽  
G. A. Ahearn
Keyword(s):  
Significant Contribution ◽  
Brush Border Membrane ◽  
Membrane Vesicles ◽  
Transport Mechanisms ◽  
Intestinal Brush Border Membrane ◽  
Overshoot Phenomenon ◽  
Independent Process ◽  
Euryhaline Teleost ◽  
Dipeptide Uptake ◽  
Phenylalanine Transport

The transport mechanisms for the dipeptide glycyl-L-phenylalanine (Gly-Phe) and L-phenylalanine (Phe) were characterized in fish intestinal brush-border membrane vesicles (BBMV). Gly-Phe was rapidly hydrolyzed only intravesicularly with almost total hydrolysis occurring even at 10 s. Dipeptide uptake was not stimulated by an inward gradient of Na, K, or H. Phe uptake was stimulated by an inward gradient of either Na or K but displayed an overshoot phenomenon only in the presence of an Na gradient. Kinetic analysis of the effect of substrate concentration on transport rate revealed that transport of both Gly-Phe and Phe occurred by a saturable process conforming to Michaelis-Menten kinetics. The Km for Gly-Phe was 9.8 +/- 3.5 mM, whereas that for Phe in the presence of Na or K, respectively, was 0.74 +/- 0.13 and 1.1 +/- 0.37 mM. Maximum uptake for Gly-Phe and for Phe in the presence of Na and K was 5.1, 0.9, and 0.4 nmol.mg and protein-1.5 s-1, respectively. Gly-Phe and Phe transport displayed different patterns of inhibition by dipeptides and amino acids. These results suggest that Gly-Phe and Phe are transported via different mechanisms, with Gly-Phe being hydrolyzed during a carrier-mediated, cation-independent process and Phe being transferred via a Na+ cotransport process similar to that described in mammals. During conditions of high luminal dipeptide concentrations, the Gly-Phe pathway may make a significant contribution to total Phe uptake.

Estrogen-related receptor γ2 controls NaCl uptake to maintain ionic homeostasis

2021 ◽  
Author(s):  
Shang-Wu Shih ◽  
Jia-Jiun Yan ◽  
Yi-Hsing Wang ◽  
Yi-Ling Tsou ◽  
Ling Chiu ◽  
...  
Keyword(s):  
Mrna Expression ◽  
Body Fluid ◽  
Whole Body ◽  
Ionic Homeostasis ◽  
Ion Regulation ◽  
Expression Levels ◽  
Morpholino Knockdown ◽  
Oryzias Melastigma ◽  
Euryhaline Teleost

Estrogen-related receptors (ERRs) are known to function in mammalian kidney as key regulators of ion transport-related genes; however, a comprehensive understanding of the physiological functions of ERRs in vertebrate body fluid ionic homeostasis is still elusive. Here, we used medaka (Oryzias melastigma), a euryhaline teleost, to investigate how ERRs are involved in ion regulation. After transferring medaka from hypertonic seawater to hypotonic freshwater (FW), the mRNA expression levels of errγ2 were highly upregulated, suggesting that ERRγ2 may play a crucial role in ion uptake. In situ hybridization and immunofluorescence staining showed that errγ2 was specifically expressed in ionocytes, the cells responsible for Na+/Cl- transport. In normal FW, ERRγ2 morpholino knockdown caused reductions in the mRNA expression of Na+/Cl- cotransporter (NCC), the number of NCC ionocytes, Na+/Cl- influxes of ionocytes, and whole-body Na+/Cl- contents. In FW with low Na+ and low Cl-, the expression levels of mRNA for Na+/H+ exchanger 3 (NHE3) and NCC were both decreased in ERRγ2 morphants. Treating embryos with DY131, an agonist of ERRγ, increased the whole-body Na+/Cl- contents and ncc mRNA expression in ERRγ2 morphants. As such, medaka ERRγ2 may control Na+/Cl- uptake by regulating ncc and/or nhe3 mRNA expression and ionocyte number, and these regulatory actions may be subtly adjusted depending on internal and external ion concentrations. These findings not only provide new insights into the underpinning mechanism of actions of ERRs, but also enhance our understanding of their roles in body fluid ionic homeostasis for adaptation to changing environments during vertebrate evolution.

scholarly journals Differential Expression Profiling of Spleen MicroRNAs in Response to Two Distinct Type II Interferons in Tetraodon nigroviridis

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e96336 ◽  
Author(s):  
Shibai Yi ◽  
Danqi Lu ◽  
Wan Peng ◽  
Ting Wang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Differential Expression ◽  
Expression Profiling ◽  
Distinct Type ◽  
Type Ii ◽  
Tetraodon Nigroviridis ◽  
Differential Expression Profiling

Regulation of ion transport by chloride cells of euryhaline teleost gill epithelium: hormones, tonicity, and cytoskeleton

2000 ◽  
Vol 126 ◽  
pp. 101
Author(s):  
W.S. Marshall ◽  
K. Daborn ◽  
T. Doyle ◽  
S.D. McCormick ◽  
T.D. Singer
Keyword(s):  
Ion Transport ◽  
Chloride Cells ◽  
Gill Epithelium ◽  
Euryhaline Teleost

Global heterochromatic colocalization of transposable elements with minisatellites in the compact genome of the pufferfish Tetraodon nigroviridis

Gene ◽  
2004 ◽  
Vol 336 (2) ◽  
pp. 175-183 ◽  
Author(s):  
Cécile Fischer ◽  
Laurence Bouneau ◽  
Jean-Pierre Coutanceau ◽  
Jean Weissenbach ◽  
Jean-Nicolas Volff ◽  
...  
Keyword(s):  
Transposable Elements ◽  
Tetraodon Nigroviridis
Sign in / Sign up

Export Citation Format

Share Document