Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis)
Fish are continuously forced to actively absorb or expel water and ions through epithelia. Most studies have focused on the gill due to its role in Na+ and Cl- trafficking. However, comparatively few studies have focused on the changing function of the intestine in response to external salinity. The...
Published in: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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Language: | English |
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Elsevier Science Inc
2017
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Online Access: | http://hdl.handle.net/10400.1/13248 https://doi.org/10.1016/j.cbpa.2016.11.009 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/13248 2023-05-15T18:10:02+02:00 Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) Ruiz-Jarabo, I. Barany, A. Jerez-Cepa, I. Mancera, J. M. Fuentes, Juan 2017-02 http://hdl.handle.net/10400.1/13248 https://doi.org/10.1016/j.cbpa.2016.11.009 eng eng Elsevier Science Inc info:eu-repo/grantAgreement/FCT/3599-PPCDT/130351/PT info:eu-repo/grantAgreement/FCT/5876/147257/PT 1095-6433 1531-4332 http://hdl.handle.net/10400.1/13248 doi:10.1016/j.cbpa.2016.11.009 restrictedAccess Bream sparus-aurata Marine teleost fish Salmon salmo-salar K+-Atpase activity Acid-base-balance Sea bream Bicarbonate secretion Water-absorption Hco3-secretion Rainbow-trout article 2017 ftunivalgarve https://doi.org/10.1016/j.cbpa.2016.11.009 2022-05-30T08:48:54Z Fish are continuously forced to actively absorb or expel water and ions through epithelia. Most studies have focused on the gill due to its role in Na+ and Cl- trafficking. However, comparatively few studies have focused on the changing function of the intestine in response to external salinity. Therefore, the present study investigated the main intestinal changes of long-term acclimation of the Senegalese sole (Solea senegalensis) to 5,15, 38 and 55 ppt. Through the measurement of short-circuit current (Isc) in Ussing chambers and biochemical approaches, we described a clear anterior/posterior functional regionalization of the intestine in response to salinity. The use of specific inhibitors in Ussing chamber experiments, revealed that the bumetanide-sensitive Na+/K+/Cl- co-transporters are the main effectors of Cl- uptake in both anterior intestine and rectum. Additionally, the use of the anion exchanger specific inhibitor, DIDS, showed a salinity/region dependency of anion exchanger function. Moreover, we also described ouabain-sensitive Na+/K+-ATPase (NKA) and Bafilomycin Al-sensitive H-ATPase activities (HA), which displayed changes related to salinity and intestinal region. However, the most striking result of the present study is the description of an omeprazole-sensitive H+/K+-ATPase (HKA) in the rectum of Senegalese sole. Its activity was consistently measurable and increased at lower salinities, reaching rates even higher than those of the NKA. Together our results provide new insights into the changing role of the intestine in response to external salinity in teleost fish. The rectal activity of HKA offers an alternative/cooperative mechanism with the HA in the final processing of intestinal water absorption by apical titration of secreted bicarbonate. (C) 2016 Elsevier Inc. All rights reserved. Ministry of Science and Education, Spain [AGL2010-14876] Ministry of Science and Higher Education European Social Funds through the Portuguese National Science Foundation (FCT) [PTDC/MAR-BIO/3811/2012, ... Article in Journal/Newspaper Salmo salar Universidade do Algarve: Sapienta Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 204 57 64 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Bream sparus-aurata Marine teleost fish Salmon salmo-salar K+-Atpase activity Acid-base-balance Sea bream Bicarbonate secretion Water-absorption Hco3-secretion Rainbow-trout |
spellingShingle |
Bream sparus-aurata Marine teleost fish Salmon salmo-salar K+-Atpase activity Acid-base-balance Sea bream Bicarbonate secretion Water-absorption Hco3-secretion Rainbow-trout Ruiz-Jarabo, I. Barany, A. Jerez-Cepa, I. Mancera, J. M. Fuentes, Juan Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
topic_facet |
Bream sparus-aurata Marine teleost fish Salmon salmo-salar K+-Atpase activity Acid-base-balance Sea bream Bicarbonate secretion Water-absorption Hco3-secretion Rainbow-trout |
description |
Fish are continuously forced to actively absorb or expel water and ions through epithelia. Most studies have focused on the gill due to its role in Na+ and Cl- trafficking. However, comparatively few studies have focused on the changing function of the intestine in response to external salinity. Therefore, the present study investigated the main intestinal changes of long-term acclimation of the Senegalese sole (Solea senegalensis) to 5,15, 38 and 55 ppt. Through the measurement of short-circuit current (Isc) in Ussing chambers and biochemical approaches, we described a clear anterior/posterior functional regionalization of the intestine in response to salinity. The use of specific inhibitors in Ussing chamber experiments, revealed that the bumetanide-sensitive Na+/K+/Cl- co-transporters are the main effectors of Cl- uptake in both anterior intestine and rectum. Additionally, the use of the anion exchanger specific inhibitor, DIDS, showed a salinity/region dependency of anion exchanger function. Moreover, we also described ouabain-sensitive Na+/K+-ATPase (NKA) and Bafilomycin Al-sensitive H-ATPase activities (HA), which displayed changes related to salinity and intestinal region. However, the most striking result of the present study is the description of an omeprazole-sensitive H+/K+-ATPase (HKA) in the rectum of Senegalese sole. Its activity was consistently measurable and increased at lower salinities, reaching rates even higher than those of the NKA. Together our results provide new insights into the changing role of the intestine in response to external salinity in teleost fish. The rectal activity of HKA offers an alternative/cooperative mechanism with the HA in the final processing of intestinal water absorption by apical titration of secreted bicarbonate. (C) 2016 Elsevier Inc. All rights reserved. Ministry of Science and Education, Spain [AGL2010-14876] Ministry of Science and Higher Education European Social Funds through the Portuguese National Science Foundation (FCT) [PTDC/MAR-BIO/3811/2012, ... |
format |
Article in Journal/Newspaper |
author |
Ruiz-Jarabo, I. Barany, A. Jerez-Cepa, I. Mancera, J. M. Fuentes, Juan |
author_facet |
Ruiz-Jarabo, I. Barany, A. Jerez-Cepa, I. Mancera, J. M. Fuentes, Juan |
author_sort |
Ruiz-Jarabo, I. |
title |
Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
title_short |
Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
title_full |
Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
title_fullStr |
Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
title_full_unstemmed |
Intestinal response to salinity challenge in the Senegalese sole (Solea senegalensis) |
title_sort |
intestinal response to salinity challenge in the senegalese sole (solea senegalensis) |
publisher |
Elsevier Science Inc |
publishDate |
2017 |
url |
http://hdl.handle.net/10400.1/13248 https://doi.org/10.1016/j.cbpa.2016.11.009 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_relation |
info:eu-repo/grantAgreement/FCT/3599-PPCDT/130351/PT info:eu-repo/grantAgreement/FCT/5876/147257/PT 1095-6433 1531-4332 http://hdl.handle.net/10400.1/13248 doi:10.1016/j.cbpa.2016.11.009 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1016/j.cbpa.2016.11.009 |
container_title |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
container_volume |
204 |
container_start_page |
57 |
op_container_end_page |
64 |
_version_ |
1766182761516761088 |