Abstract
Shuni virus (SHUV) was recently identified in Israel in several brains of ovine, bovine, and goat fetuses and newborn animals with congenital arthrogryposis-hydranencephaly syndrome. In the present study, the sequences of several Israeli SHUV strains were analyzed in detail; based on the small genome segment which encodes the nucleocapsid protein and the small nonstructural protein (NSs), a very high similarity of 99–100 % among each other was found. In contrast to the highly conserved N protein, several mutations were found within the NSs-coding sequence of SHUVs present in brain samples of malformed fetuses, resulting in a considerably frequent appearance of stop codons. Interferon alpha/beta production was demonstrated in an in-vitro interferon bioassay; hence, the virus isolated from the brain of a malformed sheep fetus acquired mutations, resulting in the loss of its NSs protein function.
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Acknowledgments
We are grateful to Nicolas Ruggli, Institute of Virology and Immunoprophylaxis, Mittelhäusern, for kindly providing the SK6-MxLUC cells, and Prof. Yehuda Stram, Dr. Anita Kovtunenko, and Mrs Anna Gorohov for their support.
Funding
This work was supported by the EU Twinning Project IL/10 CRIS/2015/356-293, Strengthening of Israeli veterinary diagnostic capacities, and funded in part by the EU Horizon 2020 program (European Commission Grant Agreement No. 643476 “COMPARE”).
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The authors declare that they have no conflict of interest.
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All applicable international, national, and institutional guidelines for the care and use of animals were followed. The permit number for the intracerebral injection of diagnostic material in mice is 020_b7650 from 21st of January 2014 (Diagnosis of Animal Disease caused by ARBOVIRUSES).
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Golender, N., Wernike, K., Bumbarov, V. et al. Characterization of Shuni viruses detected in Israel. Virus Genes 52, 806–813 (2016). https://doi.org/10.1007/s11262-016-1381-3
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DOI: https://doi.org/10.1007/s11262-016-1381-3