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A haplotype variant of porcine IFIT2 increases poly(I:C)-induced activation of NF-κB and ISRE-binding factors

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Abstract

Interferon-induced protein with tetratricopeptide repeats (IFIT) 2 is associated with various viral infections and pathogenesis in humans and mice. However, there are few reports on IFIT2 in pigs and the polymorphic information remains unclear. Here, by using a direct PCR sequencing method, we identified four single nucleotide polymorphisms (SNPs), c.259G>A (p.Gly87Ser), c.520T>G (p.Phe174Val), c.571C>T (p.Pro191Ser), and c.879A>G (p.Glu293Glu), for the first time in the coding sequence of the porcine (p) IFIT2 gene from a Chinese local breed (Hebao pig), Western commercial pig breeds (Yorkshire and Landrace), and a Chinese developed breed (Beijing Black pig). SNP c.520T>G (p.Phe174Val) leads to the addition of a tetratricopeptide repeat motif, characteristic structure of the IFIT family. SNPs c.259G>A and c.520T>G are medium polymorphic loci (0.25 < polymorphic information content < 0.5) and distributed differently in Western pig breeds and the Chinese local pig, Hebao, which is well known for its strong resistance to disease. Additionally, they are completely linked. The four SNPs constituted five haplotypes with GTCA and AGCA as dominant. The haplotype variant AGCA, which is mainly present in Hebao pigs, significantly synergized the poly(I:C)-induced activation of transcription factors, including NF-κB and IFN-stimulated response element (ISRE)-binding factors, and the expression of interferon β, indicating that the variant contributes to the induction or magnitude of the immune response upon viral infection. The data showed that variant AGCA might be useful in improving the resistance of pigs to viruses through marker-assisted selection.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (31741114), Foundation for Improving Innovative Capability of Scientific Institutions, Heilongjiang (YC2016D001), and National Science and Technology Planning Project of “12th Five-Year” in Rural Areas (2015BAD03B02-5).

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Authors and Affiliations

  1. College of Animal Science & Technology, Northeast Agricultural University, Harbin, 150030, China

    Yu Pang, Caixia Zhang, Yaguang Tian, Yanfang Song & Xiuqin Yang

  2. Agricultural Academy of Heilongjiang Province, Harbin, 150086, China

    Di Liu

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  1. Yu Pang
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  2. Caixia Zhang
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  3. Yaguang Tian
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  4. Yanfang Song
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Correspondence to Di Liu or Xiuqin Yang.

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All animal handling conformed to the requirements of Guidelines on Humane Treatment of Laboratory Animals of China.

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Pang, Y., Zhang, C., Tian, Y. et al. A haplotype variant of porcine IFIT2 increases poly(I:C)-induced activation of NF-κB and ISRE-binding factors. Mol Biol Rep 45, 2167–2173 (2018). https://doi.org/10.1007/s11033-018-4376-4

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  • DOI: https://doi.org/10.1007/s11033-018-4376-4

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