L773:1872 8057 OR L773:0303 7207
Search: L773:1872 8057 OR L773:0303 7207 > (2020-2024) > Photoperiodic regul...
- 6 of 22
- Previous record
- Next record
- To hitlist
Photoperiodic regulation of pituitary thyroid-stimulating hormone and brain deiodinase in Atlantic salmon
- Irachi, Shotaro (author)
- Hall, Daniel J. (author)
- Fleming, Mitchell S. (author)
- show more...
- Maugars, Gersende (author)
- Dufour, Sylvie (author)
- Uchida, Katsuhisa (author)
- McCormick, Stephen D. (author)
- show less...
- (creator_code:org_t)
- Elsevier BV, 2021
- 2021
- English.
- In: Molecular and Cellular Endocrinology. - : Elsevier BV. - 0303-7207 .- 1872-8057. ; 519
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- © 2020 Seasonal timing is important for many critical life history events of vertebrates, and photoperiod is often used as a reliable seasonal cue. In mammals and birds, it has been established that a photoperiod-driven seasonal clock resides in the brain and pituitary, and is driven by increased levels of pituitary thyroid stimulating hormone (TSH) and brain type 2 iodothyronine deiodinase (DIO2), which leads to local increases in triiodothyronine (T3). In order to determine if a similar mechanism occurs in fish, we conducted photoperiod manipulations in anadromous (migratory) Atlantic salmon (Salmo salar) that use photoperiod to time the preparatory development of salinity tolerance which accompanies downstream migration in spring. Changing daylength from short days (light:dark (LD) 10:14) to long days (LD 16:8) for 20 days increased gill Na+/K+-ATPase (NKA) activity, gill NKAα1b abundance and plasma growth hormone (GH) levels that normally accompany increased salinity tolerance of salmon in spring. Long-day exposure resulted in five-fold increases in pituitary tshβb mRNA levels after 10 days and were sustained for at least 20 days. tshβb mRNA levels in the saccus vasculosus were low and not influenced by photoperiod. Increased daylength resulted in significant increases in dio2b mRNA levels in the hypothalamus and midbrain/optic tectum regions of the brain. The results are consistent with the presence of a photoperiod-driven seasonal clock in fish which involves pituitary TSH, brain DIO2 and the subsequent production of T3, supporting the hypothesis that this is a common feature of photoperiodic regulation of seasonality in vertebrates.
Subject headings
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Keyword
- Deiodinase
- Growth hormone
- Na+/K+-ATPase
- Osmoregulation
- Photoperiod
- Salmon
- Smolt
- Thyroid hormone
- Thyroid stimulating hormone
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Molecular and Cellular Endocrinology (Search for host publication in LIBRIS)
To the university's database
- 6 of 22
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Irachi, Shotaro
- Hall, Daniel J.
- Fleming, Mitchel ...
- Maugars, Gersend ...
- Björnsson, Björn ...
- Dufour, Sylvie
- show more...
- Uchida, Katsuhis ...
- McCormick, Steph ...
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Biological Scien ...
- and Zoology
- Articles in the publication
- Molecular and Ce ...
- By the university
- University of Gothenburg
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
