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Molecular characterization and tissue expression profiles of insulin-like growth factor binding protein-1 (IGFBP-1) in Chinese alligator Alligator sinensis during the active and hibernating periods

Molecular characterization and tissue expression profiles of insulin-like growth factor binding... The Chinese alligator Alligator sinensis (Fauvel, 1879) is an endangered species endemic to China. Up to this date, very little is known about the regulation of its growth and development. Insulin-like growth factor binding protein-1 (IGFBP-1) plays essential roles in regulating vertebrate growth and development by modulating IGFs action. In this study, we cloned the full-length cDNA of Chinese alligator IGFBP-1 (caIGFBP-1) for the first time, which has an open reading frame (ORF) of 885-bp nucleotides encoding a peptide of 294 amino acid residues. The caIGFBP-1 contains all features of IGFBP-1 peptide with the conserved cysteine-rich N- and C-terminal domains and variable central L-domain. Multiple alignment analysis showed that caIGFBP-1 shares high identity in amino acid sequence with the IGFBP-1 s of American alligator Alligator mississippiensis (Daudin, 1802) (99.32%) and birds (66.32–74.53%). Phylogenetic tree analysis of IGFBP-1 amino acid sequences indicated that alligators cluster into bird branch. The caIGFBP-1 is widely expressed in all the examined tissues, the expression level is highest in liver, higher in kidney, moderate in pancreas, stomach, small intestine, and lower in ovary, muscle, lung, heart. During the hibernating period, the expression level of caIGFBP-1 was significantly reduced in liver, kidney, stomach, pancreas and small intestine, while did not significantly change in heart, lung, ovary and muscle. The caIGFBP-1 mRNA expression changes during the active and hibernating periods, which coincides with that of Chinese alligator IGF, implicating that it might play important roles in the IGF-mediated growth and development of Chinese alligator. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biologia Springer Journals

Molecular characterization and tissue expression profiles of insulin-like growth factor binding protein-1 (IGFBP-1) in Chinese alligator Alligator sinensis during the active and hibernating periods

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Institute of Zoology, Slovak Academy of Sciences
Subject
Life Sciences; Life Sciences, general; Plant Sciences; Zoology; Cell Biology; Microbiology
ISSN
0006-3088
eISSN
1336-9563
DOI
10.2478/s11756-018-0028-3
Publisher site
See Article on Publisher Site

Abstract

The Chinese alligator Alligator sinensis (Fauvel, 1879) is an endangered species endemic to China. Up to this date, very little is known about the regulation of its growth and development. Insulin-like growth factor binding protein-1 (IGFBP-1) plays essential roles in regulating vertebrate growth and development by modulating IGFs action. In this study, we cloned the full-length cDNA of Chinese alligator IGFBP-1 (caIGFBP-1) for the first time, which has an open reading frame (ORF) of 885-bp nucleotides encoding a peptide of 294 amino acid residues. The caIGFBP-1 contains all features of IGFBP-1 peptide with the conserved cysteine-rich N- and C-terminal domains and variable central L-domain. Multiple alignment analysis showed that caIGFBP-1 shares high identity in amino acid sequence with the IGFBP-1 s of American alligator Alligator mississippiensis (Daudin, 1802) (99.32%) and birds (66.32–74.53%). Phylogenetic tree analysis of IGFBP-1 amino acid sequences indicated that alligators cluster into bird branch. The caIGFBP-1 is widely expressed in all the examined tissues, the expression level is highest in liver, higher in kidney, moderate in pancreas, stomach, small intestine, and lower in ovary, muscle, lung, heart. During the hibernating period, the expression level of caIGFBP-1 was significantly reduced in liver, kidney, stomach, pancreas and small intestine, while did not significantly change in heart, lung, ovary and muscle. The caIGFBP-1 mRNA expression changes during the active and hibernating periods, which coincides with that of Chinese alligator IGF, implicating that it might play important roles in the IGF-mediated growth and development of Chinese alligator.

Journal

Biologia – Springer Journals

Published: Mar 29, 2018

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