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Article: Mechanisms for temperature modulation of feeding in goldfish and implications on seasonal changes in feeding behavior and food intake

TitleMechanisms for temperature modulation of feeding in goldfish and implications on seasonal changes in feeding behavior and food intake
Authors
Keywordsappetite control
feeding behavior
temperature change
leptin and leptin receptor
orexigenic factors
Issue Date2019
PublisherFrontiers Research Foundation. The Journal's web site is located at http://www.frontiersin.org/endocrinology/
Citation
Frontiers in Endocrinology, 2019, v. 10, p. article no. 133 How to Cite?
AbstractIn fish models, seasonal change in feeding is under the influence of water temperature. However, the effects of temperature on appetite control can vary among fish species and the mechanisms involved have not been fully characterized. Using goldfish (Carassius auratus) as a model, seasonal changes in feeding behavior and food intake were examined in cyprinid species. In our study, foraging activity and food consumption in goldfish were found to be reduced with positive correlation to the gradual drop in water temperature occurring during the transition from summer (28.4 ± 2.2°C) to winter (15.1 ± 2.6°C). In goldfish with a 4-week acclimation at 28°C, their foraging activity and food consumption were notably higher than their counterparts with similar acclimation at 15°C. When compared to the group at 28°C during summer, the attenuation in feeding responses at 15°C during the winter also occurred with parallel rises of leptin I and II mRNA levels in the liver. Meanwhile, a drop in orexin mRNA along with concurrent elevations of CCK, MCH, POMC, CART, and leptin receptor (LepR) transcript expression could be noted in brain areas involved in feeding control. In short-term study, goldfish acclimated at 28°C were exposed to 15°C for 24 h and the treatment was effective in reducing foraging activity and food intake. The opposite was true in reciprocal experiment with a rise in water temperature to 28°C for goldfish acclimated at 15°C. In parallel time-course study with lowering of water temperature from 28 to 15°C, short-term exposure (6–12 h) of goldfish to 15°C could also increase leptin I and II mRNA levels in the liver. Similar to our seasonality study, transcript level of orexin was reduced along with up-regulation of CCK, MCH, POMC, CART, and LepR gene expression in different brain areas. Our results, as a whole, suggest that temperature-driven regulation of leptin output from the liver in conjunction with parallel modulations of orexigenic/anorexigenic signals and leptin responsiveness in the brain may contribute to the seasonal changes of feeding behavior and food intake observed in goldfish.
Persistent Identifierhttp://hdl.handle.net/10722/277895
ISSN
2017 Impact Factor: 3.519
2015 SCImago Journal Rankings: 1.824
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorChen, T-
dc.contributor.authorWong, MKH-
dc.contributor.authorChan, BCB-
dc.contributor.authorWong, AOL-
dc.date.accessioned2019-10-04T08:03:29Z-
dc.date.available2019-10-04T08:03:29Z-
dc.date.issued2019-
dc.identifier.citationFrontiers in Endocrinology, 2019, v. 10, p. article no. 133-
dc.identifier.issn1664-2392-
dc.identifier.urihttp://hdl.handle.net/10722/277895-
dc.description.abstractIn fish models, seasonal change in feeding is under the influence of water temperature. However, the effects of temperature on appetite control can vary among fish species and the mechanisms involved have not been fully characterized. Using goldfish (Carassius auratus) as a model, seasonal changes in feeding behavior and food intake were examined in cyprinid species. In our study, foraging activity and food consumption in goldfish were found to be reduced with positive correlation to the gradual drop in water temperature occurring during the transition from summer (28.4 ± 2.2°C) to winter (15.1 ± 2.6°C). In goldfish with a 4-week acclimation at 28°C, their foraging activity and food consumption were notably higher than their counterparts with similar acclimation at 15°C. When compared to the group at 28°C during summer, the attenuation in feeding responses at 15°C during the winter also occurred with parallel rises of leptin I and II mRNA levels in the liver. Meanwhile, a drop in orexin mRNA along with concurrent elevations of CCK, MCH, POMC, CART, and leptin receptor (LepR) transcript expression could be noted in brain areas involved in feeding control. In short-term study, goldfish acclimated at 28°C were exposed to 15°C for 24 h and the treatment was effective in reducing foraging activity and food intake. The opposite was true in reciprocal experiment with a rise in water temperature to 28°C for goldfish acclimated at 15°C. In parallel time-course study with lowering of water temperature from 28 to 15°C, short-term exposure (6–12 h) of goldfish to 15°C could also increase leptin I and II mRNA levels in the liver. Similar to our seasonality study, transcript level of orexin was reduced along with up-regulation of CCK, MCH, POMC, CART, and LepR gene expression in different brain areas. Our results, as a whole, suggest that temperature-driven regulation of leptin output from the liver in conjunction with parallel modulations of orexigenic/anorexigenic signals and leptin responsiveness in the brain may contribute to the seasonal changes of feeding behavior and food intake observed in goldfish.-
dc.languageeng-
dc.publisherFrontiers Research Foundation. The Journal's web site is located at http://www.frontiersin.org/endocrinology/-
dc.relation.ispartofFrontiers in Endocrinology-
dc.rightsThis Document is Protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectappetite control-
dc.subjectfeeding behavior-
dc.subjecttemperature change-
dc.subjectleptin and leptin receptor-
dc.subjectorexigenic factors-
dc.titleMechanisms for temperature modulation of feeding in goldfish and implications on seasonal changes in feeding behavior and food intake-
dc.typeArticle-
dc.identifier.emailChan, BCB: chancb@hku.hk-
dc.identifier.emailWong, AOL: olwong@hku.hk-
dc.identifier.authorityChan, BCB=rp02140-
dc.identifier.authorityWong, AOL=rp00806-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.3389/fendo.2019.00133-
dc.identifier.pmid30899246-
dc.identifier.pmcidPMC6416165-
dc.identifier.scopuseid_2-s2.0-85066436728-
dc.identifier.hkuros306543-
dc.identifier.volume10-
dc.identifier.spagearticle no. 133-
dc.identifier.epagearticle no. 133-
dc.publisher.placeSwitzerland-

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