Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification
Udgivelsesdato: 2008-Mar-5 In euryhaline teleosts, permeability changes in gill epithelia are essential during acclimation to changed salinity. This study examined expression patterns of branchial tight junction proteins called claudins, which are important determinants of ion selectivity and genera...
Published in: | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology |
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Language: | English |
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2008
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/dd5f9450-eea7-11dc-86ef-000ea68e967b https://doi.org/10.1152/ajpregu.00915.2007 |
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ftsydanskunivpub:oai:sdu.dk:publications/dd5f9450-eea7-11dc-86ef-000ea68e967b 2024-05-19T07:37:41+00:00 Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification Tipsmark, Christian K Kiilerich, Pia Nilsen, Tom O Ebbesson, Lars Oe Stefansson, Sigurd O Madsen, Steffen S 2008-03-05 https://portal.findresearcher.sdu.dk/da/publications/dd5f9450-eea7-11dc-86ef-000ea68e967b https://doi.org/10.1152/ajpregu.00915.2007 eng eng https://portal.findresearcher.sdu.dk/da/publications/dd5f9450-eea7-11dc-86ef-000ea68e967b info:eu-repo/semantics/restrictedAccess Tipsmark , C K , Kiilerich , P , Nilsen , T O , Ebbesson , L O , Stefansson , S O & Madsen , S S 2008 , ' Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification ' , American Journal of Physiology: Regulatory, Integrative and Comparative Physiology , vol. 294 , pp. R1563-R1574 . https://doi.org/10.1152/ajpregu.00915.2007 article 2008 ftsydanskunivpub https://doi.org/10.1152/ajpregu.00915.2007 2024-04-24T00:20:45Z Udgivelsesdato: 2008-Mar-5 In euryhaline teleosts, permeability changes in gill epithelia are essential during acclimation to changed salinity. This study examined expression patterns of branchial tight junction proteins called claudins, which are important determinants of ion selectivity and general permeability in epithelia. We identified Atlantic salmon genes belonging to the claudin family by screening expressed sequence tag libraries available at NCBI and classification was performed with aid of maximum likelihood and neighbour-joining analysis. In gill libraries, five isoforms (10e, 27a, 28a, 28b and 30) were present and QPCR analysis confirmed tissue-specific expression in gill when compared to kidney, intestine, heart, muscle, brain and liver. Expression patterns during acclimation of freshwater salmon to seawater (SW) and during the smoltification process were examined. Acclimation to SW reduced the expression of claudin 27a and claudin 30 but had no overall effect on claudin 28a and claudin 28b. In contrast, SW induced a 4-fold increase in expression of claudin 10e. In accord, a peak in branchial claudin 10e was observed during smoltification in May, coinciding with optimal SW tolerance. Smoltification induced no significant changes in expression of the other isoforms. This study demonstrates the expression of an array of salmon claudin isoforms and shows that SW acclimation involves inverse regulation, in the gill, of claudin 10e versus claudin 27a and 30. It is possible, that claudin 10e is an important component of cation selective channels while reduction in claudin 27a and 30 may change permeability conditions in favour of the ion secretory mode of the SW gill. Key words: osmoregulation, teleost, tight junction, epithelia, QPCR. Article in Journal/Newspaper Atlantic salmon University of Southern Denmark Research Portal American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 294 5 R1563 R1574 |
institution |
Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
description |
Udgivelsesdato: 2008-Mar-5 In euryhaline teleosts, permeability changes in gill epithelia are essential during acclimation to changed salinity. This study examined expression patterns of branchial tight junction proteins called claudins, which are important determinants of ion selectivity and general permeability in epithelia. We identified Atlantic salmon genes belonging to the claudin family by screening expressed sequence tag libraries available at NCBI and classification was performed with aid of maximum likelihood and neighbour-joining analysis. In gill libraries, five isoforms (10e, 27a, 28a, 28b and 30) were present and QPCR analysis confirmed tissue-specific expression in gill when compared to kidney, intestine, heart, muscle, brain and liver. Expression patterns during acclimation of freshwater salmon to seawater (SW) and during the smoltification process were examined. Acclimation to SW reduced the expression of claudin 27a and claudin 30 but had no overall effect on claudin 28a and claudin 28b. In contrast, SW induced a 4-fold increase in expression of claudin 10e. In accord, a peak in branchial claudin 10e was observed during smoltification in May, coinciding with optimal SW tolerance. Smoltification induced no significant changes in expression of the other isoforms. This study demonstrates the expression of an array of salmon claudin isoforms and shows that SW acclimation involves inverse regulation, in the gill, of claudin 10e versus claudin 27a and 30. It is possible, that claudin 10e is an important component of cation selective channels while reduction in claudin 27a and 30 may change permeability conditions in favour of the ion secretory mode of the SW gill. Key words: osmoregulation, teleost, tight junction, epithelia, QPCR. |
format |
Article in Journal/Newspaper |
author |
Tipsmark, Christian K Kiilerich, Pia Nilsen, Tom O Ebbesson, Lars Oe Stefansson, Sigurd O Madsen, Steffen S |
spellingShingle |
Tipsmark, Christian K Kiilerich, Pia Nilsen, Tom O Ebbesson, Lars Oe Stefansson, Sigurd O Madsen, Steffen S Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
author_facet |
Tipsmark, Christian K Kiilerich, Pia Nilsen, Tom O Ebbesson, Lars Oe Stefansson, Sigurd O Madsen, Steffen S |
author_sort |
Tipsmark, Christian K |
title |
Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
title_short |
Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
title_full |
Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
title_fullStr |
Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
title_full_unstemmed |
Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification |
title_sort |
branchial expression patterns of claudin isoforms in atlantic salmon during seawater acclimation and smoltification |
publishDate |
2008 |
url |
https://portal.findresearcher.sdu.dk/da/publications/dd5f9450-eea7-11dc-86ef-000ea68e967b https://doi.org/10.1152/ajpregu.00915.2007 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Tipsmark , C K , Kiilerich , P , Nilsen , T O , Ebbesson , L O , Stefansson , S O & Madsen , S S 2008 , ' Branchial Expression Patterns of Claudin Isoforms in Atlantic Salmon During Seawater Acclimation and Smoltification ' , American Journal of Physiology: Regulatory, Integrative and Comparative Physiology , vol. 294 , pp. R1563-R1574 . https://doi.org/10.1152/ajpregu.00915.2007 |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/dd5f9450-eea7-11dc-86ef-000ea68e967b |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1152/ajpregu.00915.2007 |
container_title |
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology |
container_volume |
294 |
container_issue |
5 |
container_start_page |
R1563 |
op_container_end_page |
R1574 |
_version_ |
1799477037158629376 |