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| Main Authors: | , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Journal of experimental zoology. Part A, Ecological and integrative physiology
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/39718083/ |
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| _version_ | 1868266263058317313 |
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| author | Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei |
| author_facet | Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei |
| collection | PubMed - marine biology |
| contents | Regulation of Branchial Anoctamin 1 Expression in Freshwater- and Seawater-Acclimated Japanese Medaka, Oryzias latipes. Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei Animals Oryzias Fresh Water Seawater Gills Cystic Fibrosis Transmembrane Conductance Regulator Acclimatization Anoctamin-1 Hydrocortisone Gene Expression Regulation RNA, Messenger In euryhaline teleosts, the cystic fibrosis transmembrane conductance regulator (CFTR) in seawater (SW)-type chloride cells facilitates apical Cl secretion for SW adaptation, while alternative Cl excretion pathways remain understudied. This study investigates the role of the calcium-activated chloride channel, Anoctamin 1 (ANO1), in the gills of the euryhaline Japanese medaka (Oryzias latipes) under hyperosmolality and cortisol (CORT) influence. Acclimation to artificial SW, NaCl, mannitol, or glucose significantly upregulated ANO1 and CFTR mRNA expression in gills, unlike urea treatment. In situ hybridization revealed ANO1 mRNA in chloride cells co-expressing CFTR and Na, K-ATPase under hyperosmotic conditions. ANO1 inhibition elevated plasma Cl concentration, indicating impaired Cl excretion. CORT or dexamethasone administration in freshwater (FW) fish significantly increased branchial ANO1 and CFTR mRNA expression, an effect attenuated by the glucocorticoid receptor (GR) antagonist RU486. Hyperosmotic treatment of isolated gill tissues rapidly induced ANO1 mRNA expression independent of CFTR mRNA changes, and this induction was unaffected by RU486. These findings highlight the dual regulation of ANO1 expression via hyperosmolality-induced cellular response and the CORT-GR system. Thus, branchial ANO1 may likely complement CFTR in Cl⁻ excretion, playing a key role in the hyperosmotic adaptation of euryhaline teleosts. |
| format | Artículo científico |
| id | pubmed_39718083 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Journal of experimental zoology. Part A, Ecological and integrative physiology |
| record_format | pubmed |
| spellingShingle | Regulation of Branchial Anoctamin 1 Expression in Freshwater- and Seawater-Acclimated Japanese Medaka, Oryzias latipes. Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei Animals Oryzias Fresh Water Seawater Gills Cystic Fibrosis Transmembrane Conductance Regulator Acclimatization Anoctamin-1 Hydrocortisone Gene Expression Regulation RNA, Messenger Regulation of Branchial Anoctamin 1 Expression in Freshwater- and Seawater-Acclimated Japanese Medaka, Oryzias latipes. Konno, Norifumi Togashi, Ayane Miyanishi, Hiroshi Azuma, Morio Nakamachi, Tomoya Matsuda, Kouhei Animals Oryzias Fresh Water Seawater Gills Cystic Fibrosis Transmembrane Conductance Regulator Acclimatization Anoctamin-1 Hydrocortisone Gene Expression Regulation RNA, Messenger In euryhaline teleosts, the cystic fibrosis transmembrane conductance regulator (CFTR) in seawater (SW)-type chloride cells facilitates apical Cl secretion for SW adaptation, while alternative Cl excretion pathways remain understudied. This study investigates the role of the calcium-activated chloride channel, Anoctamin 1 (ANO1), in the gills of the euryhaline Japanese medaka (Oryzias latipes) under hyperosmolality and cortisol (CORT) influence. Acclimation to artificial SW, NaCl, mannitol, or glucose significantly upregulated ANO1 and CFTR mRNA expression in gills, unlike urea treatment. In situ hybridization revealed ANO1 mRNA in chloride cells co-expressing CFTR and Na, K-ATPase under hyperosmotic conditions. ANO1 inhibition elevated plasma Cl concentration, indicating impaired Cl excretion. CORT or dexamethasone administration in freshwater (FW) fish significantly increased branchial ANO1 and CFTR mRNA expression, an effect attenuated by the glucocorticoid receptor (GR) antagonist RU486. Hyperosmotic treatment of isolated gill tissues rapidly induced ANO1 mRNA expression independent of CFTR mRNA changes, and this induction was unaffected by RU486. These findings highlight the dual regulation of ANO1 expression via hyperosmolality-induced cellular response and the CORT-GR system. Thus, branchial ANO1 may likely complement CFTR in Cl⁻ excretion, playing a key role in the hyperosmotic adaptation of euryhaline teleosts. |
| title | Regulation of Branchial Anoctamin 1 Expression in Freshwater- and Seawater-Acclimated Japanese Medaka, Oryzias latipes. |
| topic | Animals Oryzias Fresh Water Seawater Gills Cystic Fibrosis Transmembrane Conductance Regulator Acclimatization Anoctamin-1 Hydrocortisone Gene Expression Regulation RNA, Messenger |
| url | https://pubmed.ncbi.nlm.nih.gov/39718083/ |