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Kaivarainen EI, Rendakov NL, Efremov DA, Nemova NN. Na +/K +-ATPase Activity in Smolts of Pink Salmon Oncorhynchus gorbuscha (Walbaum, 1792) from the White Sea Exposed to Fresh, Estuarine, and Sea Water. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2021; 501:201-205. [PMID: 34962607 DOI: 10.1134/s0012496621060041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/30/2021] [Accepted: 08/30/2021] [Indexed: 06/14/2023]
Abstract
The Na+/K+-ATPase (NKA) activity in smolts of pink salmon Oncorhynchus gorbuscha (a salmon species introduced in 1959 into the rivers of the Kola Peninsula) was studied in a ten-day cage experiment with fresh, estuarine, and sea water; the fish were caught during seaward migration in the Indera River of the White Sea basin. The development of tolerance to increased salinity in pink salmon smolts was accompanied by NKA activation. In estuarine water characterized by salinity fluctuations (from fresh to sea water) and in the marine environment (28‰), the NKA activity in pink salmon smolts was significantly higher than in the individuals kept in the cages installed in fresh water. The hypoosmoregulatory ability of pink salmon fry was registered, these data indicated that smoltification in this fish species took place in early ontogenesis. The changes in NKA activity evidenced the readiness of migrating pink salmon fry for the marine phase of their life cycle.
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Affiliation(s)
- E I Kaivarainen
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
| | - N L Rendakov
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia.
| | - D A Efremov
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
| | - N N Nemova
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
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Vargas-Chacoff L, Arjona FJ, Ruiz-Jarabo I, García-Lopez A, Flik G, Mancera JM. Water temperature affects osmoregulatory responses in gilthead sea bream (Sparus aurata L.). J Therm Biol 2020; 88:102526. [PMID: 32126001 DOI: 10.1016/j.jtherbio.2020.102526] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/16/2020] [Accepted: 01/19/2020] [Indexed: 11/26/2022]
Abstract
Sea bream (Sparus aurata Linneaus) was acclimated to three salinity concentrations, viz. 5 (LSW), 38 (SW) and 55psμ (HSW) and three water temperatures regimes (12, 19 and 26 °C) for five weeks. Osmoregulatory capacity parameters (plasma osmolality, sodium, chloride, cortisol, and branchial and renal Na+,K+-ATPase activities) were also assessed. Salinity and temperature affected all of the parameters tested. Our results indicate that environmental temperature modulates capacity in sea bream, independent of environmental salinity, and set points of plasma osmolality and ion concentrations depend on both ambient salinity and temperature. Acclimation to extreme salinity resulted in stress, indicated by elevated basal plasma cortisol levels. Response to salinity was affected by ambient temperature. A comparison between branchial and renal Na+,K+-ATPase activities appears instrumental in explaining salinity and temperature responses. Sea bream regulate branchial enzyme copy numbers (Vmax) in hyperosmotic media (SW and HSW) to deal with ambient temperature effects on activity; combinations of high temperatures and salinity may exceed the adaptive capacity of sea bream. Salinity compromises the branchial enzyme capacity (compared to basal activity at a set salinity) when temperature is elevated and the scope for temperature adaptation becomes smaller at increasing salinity. Renal Na+,K+-ATPase capacity appears fixed and activity appears to be determined by temperature.
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Affiliation(s)
- Luis Vargas-Chacoff
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación de Altas Latitudes (Fondap IDEAL), Universidad Austral de Chile, Valdivia, Chile.
| | - Francisco J Arjona
- Departamento de Biología, Facultad de Ciencias Del Mar y Ambientales, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain; Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, the Netherlands
| | - Ignacio Ruiz-Jarabo
- Departamento de Biología, Facultad de Ciencias Del Mar y Ambientales, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Angel García-Lopez
- Instituto de Ciencias Marinas de Andalucía, Consejo Superior de Investigaciones Científicas, 11510, Puerto Real, Cádiz, Spain
| | - Gert Flik
- Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, the Netherlands
| | - Juan M Mancera
- Departamento de Biología, Facultad de Ciencias Del Mar y Ambientales, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
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Similarity of osmoregulatory capacity in coastal and inland alligator gar. Comp Biochem Physiol A Mol Integr Physiol 2017; 209:16-24. [PMID: 28400249 DOI: 10.1016/j.cbpa.2017.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/05/2017] [Accepted: 04/05/2017] [Indexed: 11/24/2022]
Abstract
The alligator gar Atractosteus spatula is a primitive fish species, occupying a wide range of temperature and salinity habitats. Long-distance movements are limited, leading to genetic differentiation between inland and coastal populations. Unknown is whether physiological capacity differs between geographically separated populations, particularly for traits important to osmoregulation in saline environments. Alligator gar from inland and coastal populations were reared in a similar environment and exposed to temperature (10, 30°C) and salinity (0, 20ppt) extremes to determine whether iono- and osmoregulatory ability differed between populations. There were few differences in osmoregulatory ability between populations, with similar gill, blood and gastrointestinal tract osmoregulatory parameters. Blood plasma osmolality, ion concentrations, intestinal pH and bicarbonate base concentrations, intestinal fluid osmolality, ion concentrations and gill Na+, K+-ATPase (NKA) activity were similar between populations. Notably, gar from both populations did not osmoregulate well at low temperature and high salinity, with elevated plasma osmolality and ion concentrations, low gill NKA, and little evidence of gastrointestinal tract contribution to ionic and base regulation based on a lack of intestinal fluid and low base content. Therefore, the hypothesis that coastal gar would have improved osmotic regulatory ability in saline environments as compared to inland alligator gar was not supported, suggesting physiological capacity may be retained in primitive species possibly due to its importance to their persistence through time.
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Díaz M, Dópido R, Gómez T, Rodríguez C. Membrane Lipid Microenvironment Modulates Thermodynamic Properties of the Na +-K +-ATPase in Branchial and Intestinal Epithelia in Euryhaline Fish In vivo. Front Physiol 2016; 7:589. [PMID: 28018232 PMCID: PMC5156835 DOI: 10.3389/fphys.2016.00589] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/14/2016] [Indexed: 11/16/2022] Open
Abstract
We have analyzed the effects of different native membrane lipid composition on the thermodynamic properties of the Na+-K+-ATPase in different epithelia from the gilthead seabream Sparus aurata. Thermodynamic parameters of activation for the Na+-K+-ATPase, as well as contents of lipid classes and fatty acids from polar lipids were determined for gill epithelia and enterocytes isolated from pyloric caeca, anterior intestine and posterior intestine. Arrhenius analyses of control animals revealed differences in thermal discontinuity values (Td) and activation energies determined at both sides of Td between intestinal and gill epithelia. Eyring plots disclosed important differences in enthalpy of activation (ΔH‡) and entropy of activation (ΔS‡) between enterocytes and branchial cells. Induction of n-3 LCPUFA deficiency dramatically altered membrane lipid composition in enterocytes, being the most dramatic changes the increase in 18:1n-9 (oleic acid) and the reduction of n-3 LCPUFA (mainly DHA, docosahexaenoic acid). Strikingly, branchial cells were much more resistant to diet-induced lipid alterations than enterocytes, indicating the existence of potent lipostatic mechanisms preserving membrane lipid matrix in gill epithelia. Paralleling lipid alterations, values of Ea1, ΔH‡ and ΔS‡ for the Na+-K+-ATPase were all increased, while Td values vanished, in LCPUFA deficient enterocytes. In turn, Differences in thermodynamic parameters were highly correlated with specific changes in fatty acids, but not with individual lipid classes including cholesterol in vivo. Thus, Td was positively related to 18:1n-9 and negatively to DHA. Td, Ea1 and ΔH‡ were exponentially related to DHA/18:1n-9 ratio. The exponential nature of these relationships highlights the strong impact of subtle changes in the contents of oleic acid and DHA in setting the thermodynamic properties of epithelial Na+-K+-ATPase in vivo. The effects are consistent with physical effects on the lipid membrane surrounding the enzyme as well as with direct interactions with the Na+-K+-ATPase.
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Affiliation(s)
- Mario Díaz
- Laboratorio de Fisiología Animal, Sección Biología, Departamento de Biología Animal, Facultad de Ciencias, Edafología y Geología, Universidad de La Laguna Tenerife, Spain
| | - Rosa Dópido
- Laboratorio de Fisiología Animal, Sección Biología, Departamento de Biología Animal, Facultad de Ciencias, Edafología y Geología, Universidad de La Laguna Tenerife, Spain
| | - Tomás Gómez
- Laboratorio de Fisiología Animal, Sección Biología, Departamento de Biología Animal, Facultad de Ciencias, Edafología y Geología, Universidad de La Laguna Tenerife, Spain
| | - Covadonga Rodríguez
- Laboratorio de Fisiología Animal, Sección Biología, Departamento de Biología Animal, Facultad de Ciencias, Edafología y Geología, Universidad de La Laguna Tenerife, Spain
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Almansa E, Sánchez JJ, Cozzi S, Rodríguez C, Díaz M. Temperature-activity relationship for the intestinal Na+-K+-ATPase of Sparus aurata. A role for the phospholipid microenvironment? J Comp Physiol B 2003; 173:231-7. [PMID: 12743726 DOI: 10.1007/s00360-003-0327-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2002] [Indexed: 10/25/2022]
Abstract
The temperature dependence for Na(+)-K(+)-ATPase has been examined in the proximal-distal axis of the intestine of gilthead seabream (Sparus aurata), i.e. pyloric caeca (PC), anterior intestine (AI) and posterior intestine (PI). Data derived from the Arrhenius plots showed differences in terms of temperature discontinuity points ( Td) (13.29 degrees C, 16.39 degrees C and 17.48 degrees C for PC, AI and PI, respectively) and activation energy ratios (Ea(2)/Ea(1)) obtained at both sides of Td (2.38, 1.98 and 1.78, for PC, AI and PI, respectively). The analyses of polar lipids showed differences in the levels of certain fatty acids among intestinal regions. The content of each fatty acid and different fatty acid ratios were correlated with the corresponding Td and Ea(2)/Ea(1) values. Regression analyses revealed the existence of strong negative correlations between docosahexaenoic acid (22:6n-3, DHA) or the DHA/monoenes ratio and Td. No obvious relationships were observed for other polyunsaturated fatty acids (PUFA) nor saturated fatty acids. The results obtained in the present study indicate that the heterogeneous values of Td displayed by the Na(+)-K(+)-ATPase along the intestinal tract could be related to a modulatory role of certain fatty acid within the lipid microenvironment of the enzyme.
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Affiliation(s)
- E Almansa
- Laboratorio de Fisiología Animal, Departamento de Biología Animal, Facultad de Biología, Universidad de La Laguna, 38206 Tenerife, Spain
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Characterization of intestinal Na+–K+-ATPase in the gilthead seabream (Sparus aurata L.). Evidence for a tissue-specific heterogeneity. Comp Biochem Physiol B Biochem Mol Biol 1998. [DOI: 10.1016/s0305-0491(98)10052-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pagliarani A, Ventrella V, Trombetti F, Pirini M, Trigari G, Borgatti AR. Mussel microsomal Na+-Mg2+-ATPase sensitivity to waterborne mercury, zinc and ammonia. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0742-8413(95)02086-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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