Cortisol, a Sodium Excreting Factor in the Eel (Anguilla anguilla L.) adapted to Sea Water

Mayer, Nóra; Maetz, J.; Chan, D; Forster, Malcolm E.; Jones, I.Chester

doi:10.1038/2141118a0

Cited by 109 publications

(19 citation statements)

References 10 publications

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“…During seawater transfer, it has been reported that there was a marked transitory increase in plasma cortisol and branchial cAMP levels (Foskett et al, 1983;Marshall and Singer, 2002;Assem and Hanke, 1981;Ball et al, 1971;Mayer et al, 1967). Numerous studies have demonstrated the stimulatory effect of cortisol on Na + /K + -ATPase and NKCC expressions in different fish species (Pelis and McCormick, 2001;Wong and Chan, 2001;LaizCarrion et al, 2003;Richards et al, 2003;Sunny and Oommen, 2001).…”

Section: Discussionmentioning

confidence: 99%

Effect of osmotic shrinkage and hormones on the expression of Na+/H+ exchanger-1,Na+/K+/2Cl– cotransporter and Na+/K+-ATPase in gill pavement cells of freshwater adapted Japanese eel,Anguilla japonica

Tse

Wong

2007

Journal of Experimental Biology

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Section: Discussionmentioning

confidence: 99%

Effect of osmotic shrinkage and hormones on the expression of Na+/H+ exchanger-1,Na+/K+/2Cl– cotransporter and Na+/K+-ATPase in gill pavement cells of freshwater adapted Japanese eel,Anguilla japonica

Tse

Wong

2007

Journal of Experimental Biology

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“…Cortisol has recently been observed to increase the ionic turn-over in the gills of the European eel (Mayer, Maetz, Chan, Forster & Jones, 1967), and to increase the intestinal water transport from Ringer fluid in the Japanese eel (Hirano, 1967).…”

Section: Discussionmentioning

confidence: 99%

The mechanism of salt and water absorption in the intestine of the eel (Anguilla anguilla) adapted to waters of various salinities

Skadhauge¹

1969

The Journal of Physiology

135

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SUMMARY1. The absorption of NaCi and water was studied by intraluminal in vivo perfusion of the intestine of the yellow European eel (Anguilla anguilla) adapted to fresh water (FW), to sea water (SW), and to double strength SW (DSW).2. The net lumen to plasma NaCl transport from diluted SW perfusion fluids was independent of the NaCl concentration in the Na+ concentration range tested. The NaCl absorption (expressed as ,t-equiv/100 g . hr.) increased from FW (mean +S.E.): Na+ 166+ 17, Cl-205+ 24 to SW: Na+ 363 + 33, Cl-423 + 37, and again in DSW: Na+ 640 + 110, C1-676 + 149.3. The osmolality of the perfusion fluid which resulted in zero net water transport was higher than plasma osmolality by 73 + 3 m-osmole in FW, 126 + 5 m-osmole in SW, and 244 + 32 m-osmole in DSW (mean + s.E.). A fairly constant ratio between net NaCl transport and this osmolality difference prevailed.4. The general osmotic permeability to water in the serosa-mucosa direction (expressed as ,al./100g.hr.m-osmole) measured from experiments with impermeant solute increased from FW: 3-7 + 0-5 to SW: 7-2 + 1.0 (mean + S.E.).5. These results are compatible with the interpretation that the water flow occurring in the absence of a general transmural osmotic gradient, the 'solute-linked water flow', is linearly related both to net NaCl transport and to the osmotic permeability to water. The findings support the view that the 'solute-linked water flow' is, indeed, secondary to the salt movement and is due to osmotic force.

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“…In a variety of teleosts, in vivo treatment with cortisol stimulated ion pumps in the gill, intestines, kidney, and urinary bladder, as reflected in increased Na+,K+-ATPase activity or fluid transport (Mayer and Maetz 1967;Pickford et al 1970;Hirano and Utida 1971;Foskett et al 1983;Veillette et al 1991). Cortisol is especially important in acclimation to seawater by stimulation of gill Na+,K+-ATPase activity and chloride cell differentiation in several salmonid species (Bjornsson et al 1987;Richman and Zaugg 1987;McCormick and Bern 1989;Bisbal and Specker 1991;Madsen 1990a,c).…”

Section: Cortisolmentioning

confidence: 99%

Osmoregulatory actions of growth hormone and its mode of action in salmonids: A review

Sakamoto

McCormick

Hirano

1993

Fish Physiol Biochem

213

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Osmoregulatory actions of growth hormone (GH) and its mode of action in salmonids are reviewed. We present evidence suggesting that insulin-like growth factor I (IGF-I) mediates some of the actions of GH on seawater acclimation. Plasma concentration and turnover of GH rise following exposure to seawater. Exogenous GH (in vivo) increases gill Na(+),K(+)-ATPase activity and the number of gill chloride cells, and inhibits an increase in plasma osmolarity and ions following transfer of fish to seawater. A single class of high affinity GH receptors is present in the liver, gill, intestine, and kidney. The levels of IGF-I mRNA in the liver, gill and kidney increased after GH-injection. After transfer to seawater, IGF-I mRNA increased in the gill and kidney following the rise in plasma GH, although no significant change was seen in the liver. Injection of IGF-I improved the ability of the fish to maintain plasma sodium levels after transfer to seawater. GH treatment also sensitizes the interrenal to adrenocorticotropin (ACTH), increasing cortisol secretion. Both cortisol and IGF-I may be involved in mediating the action of GH in seawater adaptation, although studies on the effect of GH on osmoregulatory physiology of non-salmonid species are limited. An integrated model of the osmoregulatory actions of GH is presented, and areas in need of research are outlined.

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Cortisol, a Sodium Excreting Factor in the Eel (Anguilla anguilla L.) adapted to Sea Water

Cited by 109 publications

References 10 publications

Effect of osmotic shrinkage and hormones on the expression of Na+/H+ exchanger-1,Na+/K+/2Cl– cotransporter and Na+/K+-ATPase in gill pavement cells of freshwater adapted Japanese eel,Anguilla japonica

Effect of osmotic shrinkage and hormones on the expression of Na+/H+ exchanger-1,Na+/K+/2Cl– cotransporter and Na+/K+-ATPase in gill pavement cells of freshwater adapted Japanese eel,Anguilla japonica

The mechanism of salt and water absorption in the intestine of the eel (Anguilla anguilla) adapted to waters of various salinities

Osmoregulatory actions of growth hormone and its mode of action in salmonids: A review

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