NDLI: Molecular cloning and expression of insulin-like growth factor-I (IGF-I) in Eurasian perch (Perca fluviatilis): lack of responsiveness to growth hormone treatment

Content Provider	Springer Nature Link
Author	Jentoft, Sissel Aastveit, Are H. Andersen, Øivind
Copyright Year	2005
Abstract	The cloning of Eurasian perch (Perca fluviatilis) insulin-like growth factor-I (IGF-I) liver cDNA resulted in the identification of two transcripts of 794 and 713 nucleotides. Whereas the long IGF-Ib isoform consisted of 186 residues, the short IGF-Ia isoform was lacking 27 residues of the E domain due to alternative exon splicing. The long isoform was more abundant than the short isoform in liver, while the expression of both isoforms was rather low in non-hepatic tissues. In order to elucidate the specific endocrine regulation of growth in perch, effects of growth hormone (GH) treatment on weight gain and hepatic IGF-I expression were investigated in juvenile Eurasian perch. Fish injected with Southern black bream (Acanthopagrus butcheri, Perciformes) GH (0.5 μg/g body weight) grew significantly faster than the saline injected control group, whereas treatment with bovine GH (1.0 μg/g body weight) gave no growth enhancement. No effects of the GH treatments on hepatic IGF-I mRNA expression were shown by Northern blot analysis. Thus, the impact of GH-IGF-I axis on growth regulation in Eurasian perch remains unclear, but might be affected by IGF-binding proteins (IGFBPs).
Starting Page	67
Ending Page	76
Page Count	10
File Format	PDF
ISSN	09201742
Journal	Fish Physiology and Biochemistry
Volume Number	30
Issue Number	1
e-ISSN	15735168
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-04-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	alternative splicing Eurasian perch growth IGF-I cDNA pro-IGF-I Animal Biochemistry Hydrobiology Zoology Animal Anatomy / Morphology / Histology Animal Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Biochemistry Aquatic Science

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