| Response of the somatotropic axis to alterations in feed intake of channel catfish (Ictaluruspunctatus). | |
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MedLine Citation:
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PMID: 19379818 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To better understand the effects of reduced feeding frequency on the GH-IGF-I axis, channel catfish (Ictaluruspunctatus), were either fed (Fed control, commercial diet fed daily), fed every other day (FEOD, commercial diet fed every other day), or not fed (Unfed, no feed). Pituitary GH mRNA increased whereas hepatic growth hormone receptor (GHR), IGF-I mRNA, and plasma IGF-I decreased in the FEOD and Unfed fish (P<0.05). In another study, fish were either continually fed (Fed) or fasted and then re-fed (Restricted) to examine the physiological regulation of somatostatin-14 (SS-14) and SS-22 mRNA. Fasting increased (P<0.05) levels of SS-14 mRNA in the hypothalamus and pancreatic islets (Brockmann bodies) at d 30 while re-feeding decreased SS-14 mRNA to control values in all tissues examined by d 45. Fasting had no effect on levels of SS-22 mRNA in the pancreatic islets whereas SS-22 mRNA was not detected in the stomach or hypothalamus. The results demonstrate that feeding every other day has similar negative impacts on components of the GH-IGF-I axis as fasting. The observed increase in SS-14 mRNA in the hypothalamus and pancreatic islets suggests a role for SS-14 in modulating the GH-IGF-I axis in channel catfish. |
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Authors:
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B C Peterson; A L Bilodeau-Bourgeois; B C Small |
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Publication Detail:
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Type: Journal Article Date: 2009-04-18 |
Journal Detail:
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Title: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology Volume: 153 ISSN: 1531-4332 ISO Abbreviation: Comp. Biochem. Physiol., Part A Mol. Integr. Physiol. Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-05-25 Completed Date: 2009-08-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9806096 Medline TA: Comp Biochem Physiol A Mol Integr Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 457-63 Citation Subset: IM |
Affiliation:
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USDA/ARS Catfish Genetics Research Unit, Thad Cochran National Warmwater Aquaculture Center, PO Box 38, Stoneville, MS 38776, USA. brian.peterson@ars.usda.gov |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed* Animals Base Sequence DNA Primers Growth Hormone / genetics, physiology* Hepatocyte Growth Factor / genetics Hypothalamus / metabolism Ictaluridae / physiology* Insulin-Like Growth Factor I / genetics, physiology* Islets of Langerhans / metabolism Pituitary Gland / metabolism Polymerase Chain Reaction RNA, Messenger / genetics Somatostatin / genetics |
| Chemical | |
Reg. No./Substance:
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0/DNA Primers; 0/RNA, Messenger; 51110-01-1/Somatostatin; 67256-21-7/Hepatocyte Growth Factor; 67763-96-6/Insulin-Like Growth Factor I; 9002-72-6/Growth Hormone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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