Changes in circulating insulin-like growth factor-1 and its binding proteins in yearling rainbow trout during spring under natural and manipulated photoperiods and their relationships with gill Na+, K+-ATPase and body size

Cui, Wenda; Takahashi, Eisuke; Morro, Bernat; Balseiro, Pablo; Albalat, Amaya; Pedrosa, Cindy; Mackenzie, Simon; Nilsen, Tom O.; Sveier, Harald; Ebbesson, Lars O.; Handeland, Sigurd O.; Shimizu, Munetaka

Changes in circulating insulin-like growth factor-1 and its binding proteins in yearling rainbow trout during spring under natural and manipulated photoperiods and their relationships with gill Na+, K+-ATPase and body size

Cui, Wenda; Takahashi, Eisuke; Morro, Bernat et al.

Comparative Biochemistry and Physiology Part A : molecular & integrative physiology, 2022, 268, 111205

Permalink : https://hdl.handle.net/2115/89370

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アクセス権	open access
URI	https://hdl.handle.net/2115/89370
タイトル	Changes in circulating insulin-like growth factor-1 and its binding proteins in yearling rainbow trout during spring under natural and manipulated photoperiods and their relationships with gill Na+, K+-ATPase and body size
著者	Cui, Wenda ; Takahashi, Eisuke ; Morro, Bernat ; Balseiro, Pablo ; Albalat, Amaya ; Pedrosa, Cindy ; Mackenzie, Simon ; Nilsen, Tom O. ; Sveier, Harald ; Ebbesson, Lars O. ; Handeland, Sigurd O. ; Shimizu, Munetaka
著者名 Cui, Wenda
著者名 Takahashi, Eisuke
著者名 Morro, Bernat
著者名 Balseiro, Pablo
著者名 Albalat, Amaya
著者名 Pedrosa, Cindy
著者名 Mackenzie, Simon
著者名 Nilsen, Tom O.
著者名 Sveier, Harald
著者名 Ebbesson, Lars O.
著者名 Handeland, Sigurd O.
e-Rad_Researcher 90431337 著者名 Shimizu, Munetaka
言語	英語
キーワード	Body size
	Feeding restriction
	Hypo-osmoregulatory ability
	IGFBP-2b
	Smoltification
発行日	2022-06
出版者	Elsevier
収録物名	Comparative Biochemistry and Physiology Part A : molecular & integrative physiology
巻(号)	268
ページ	111205
抄録	Smoltification in salmonids occurs during spring in response to increasing photoperiod to prepare for marine life. Smoltification is associated with increased hypo-osmoregulatory ability and enhanced growth potential, mediated by growth hormone and insulin-like growth factor (IGF)-1. Rainbow trout is uniquely insensitive to the induction of smoltification-associated changes by photoperiod, such as the activation of gill Na+,K+-ATPase (NKA). We measured the circulating IGF-1 and IGF-binding protein (IGFBP)-2b levels in yearling rainbow trout exposed to natural and manipulated photoperiods during spring and correlated these with gill NKA activity and body size. Although the effect of photoperiod manipulation on body size and circulating IGF-1 and IGFBP-2b was negligible, they were positively correlated with gill NKA activity in fish under simulated natural photoperiod. We next pit-tagged yearling rainbow trout and fed them a restricted ration or to satiation under a natural photo period. In April, gill NKA activity was higher in the satiation group than in the restricted group and positively correlated with body size and growth rate. In addition, circulating IGFBP-2b was positively correlated with gill NKA, size and growth, whereas circulating IGF-1 was correlated only with size and growth. The relationship between circulating IGF-1 and growth intensified from May to June, suggesting that the IGF-1-growth relationship was disrupted in April when gill NKA was activated. Two additional IGFBPs were related to growth parameters but not to gill NKA activity. The present study suggests that circulating IGFBP-2b and IGF-1 mediate the size-dependent activation of gill NKA in yearling rainbow trout during spring.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© <2022>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1095-6433
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.cbpa.2022.111205