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Characterizations of the bovine subtype Interferon-tau Genes : Sequences of Genes and Biological Activity of Transcription Factors in JEG3 Cell

  • Kim, Min-Su (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Min, Kwan-Sik (Animal Biotechnology, Hankyong National University) ;
  • Seong, Hwan-Hoo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Chan-Lan (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Dongkyo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Imakawa, Kazuhiko (Laboratory of Animal Breeding, Graduate School of Agricultural and Life Sciences, University of Tokyo) ;
  • Kim, Sung Woo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
  • Received : 2016.11.22
  • Accepted : 2016.12.30
  • Published : 2016.12.31

Abstract

Multiple interferon tau (IFNT) genes exist in bovine. An antiluteolytic substance secreted by the bovine conceptus and primarily responsible for maternal recognition of pregnancy is bovine trophoblast protein 1 (bIFNT1), a new type I interferon tau (IFNT) genes. The objectives of this research were to investigate whether multiple, distinct gene encode bIFNT1 and other type I bIFNT gene in the bovine genome and to examine expression of bIFNT1 and other bIFNTc1 mRNAs during conceptus development. These transcrips could be regulated through caudal-related homeobox-2 (CDX2) and ETS2 and/or AP1 (JUN) expression, a transcription factor implicated in the control of cell differentiation in the trophectoderm. The presence of mRNAs encoded by bIFNT1 and type I bIFNTc1 genes were examined quantitatively via reverse transcription-polymerase chain reaction (RT-PCR) analysis of total cellular RNA (tcRNA) extracted from on day 17, 20 and 22 bovine conceptuses. The expression level of bIFNT1 was higher on day 17 transcripts were gradually weakly detectable on day 20 and 22. However, the other bIFNTc1 gene examined transcripts was highly expressed on day 20 and transcripts were weakly detectable on day 17 and 22 bovine conceptuses. Furthermore, human choriocarcinoma JEG3 was co-transfected with an -1kb-bIFNT1/c1-Luc constructs and several transcription factor expression plasmids. Compared to each -1kb-bIFNT1/c1-Luc increased when this constructs were co-transfected with, ETS2, AP1(JUN), CREBBP and/or CDX2. Also, bIFNTc1 gene was had very effect on activity by alone ETS2, and AP1 (JUN) expression factors in choriocarcinoma JEG3 cell. However, bIFNT1 gene expression of the upstream region was not identified. We demonstrated that the activities of bIFN genes are regulated by differential, tissue-specific and developmental competence during pregnancy.

Keywords

References

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