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Identification and expression analysis of cDNA encoding insulin-like growth factor 2 in horses

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Title: Identification and expression analysis of cDNA encoding insulin-like growth factor 2 in horses
Authors: Kikuchi, Kohta Browse this author
Sasaki, Keisuke Browse this author
Akizawa, Hiroki Browse this author
Tsukahara, Hayato Browse this author
Bai, Hanako Browse this author
Takahashi, Masashi Browse this author →KAKEN DB
Nambo, Yasuo Browse this author
Hata, Hiroshi Browse this author
Kawahara, Manabu Browse this author →KAKEN DB
Keywords: Amino acid sequence
Insulin-like growth factor 2
Untranslated region
Issue Date: 27-Feb-2018
Publisher: Society for Reproduction and Development(SRD)
Journal Title: Journal of Reproduction and Development
Volume: 64
Issue: 1
Start Page: 57
End Page: 64
Publisher DOI: 10.1262/jrd.2017-124
Abstract: Insulin-like growth factor 2 (IGF2) is responsible for a broad range of physiological processes during fetal development and adulthood, but genomic analyses of IGF2 containing the 5ʹ- and 3ʹ-untranslated regions (UTRs) in equines have been limited. In this study, we characterized the IGF2 mRNA containing the UTRs, and determined its expression pattern in the fetal tissues of horses. The complete equine IGF2 mRNA sequence harboring another exon approximately 2.8 kb upstream from the canonical transcription start site was identified as a new transcript variant. As this upstream exon did not contain the start codon, the amino acid sequence was identical to the canonical variant. Analysis of the deduced amino acid sequence revealed that the protein possessed two major domains, IlGF and IGF2_C, and analysis of IGF2 sequence polymorphism in fetal tissues of Hokkaido native horse and Thoroughbreds revealed a single nucleotide polymorphism (T to C transition) at position 398 in Thoroughbreds, which caused an amino acid substitution at position 133 in the IGF2 sequence. Furthermore, the expression pattern of the IGF2 mRNA in the fetal tissues of horses was determined for the first time, and was found to be consistent with those of other species. Taken together, these results suggested that the transcriptional and translational products of the IGF2 gene have conserved functions in the fetal development of mammals, including horses.
Rights: ©2018 by the Society for Reproduction and Development., This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0:
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 川原 学

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