Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Rapid Determining for Subtypes and Pandemic Type of Swine Influenza Virus by Diagnostic One-step RT-PCR

진단용 one-step RT-PCR을 통한 돼지 인플루엔자 바이러스의 아형 및 pandemic 유형에 대 한 신속한 결정

  • Kim, Gwang Il (Department of Biological Sciences, Andong National University) ;
  • Kim, Jee In (Institute of Vaccine Biotechnology, Andong National University) ;
  • Kwon, Jin-Hyeap (Department of Biological Sciences, Andong National University) ;
  • Min, Yoo Hong (Department of Biological Sciences, Andong National University) ;
  • Kang, Joo Il (Bionics) ;
  • Lee, Chang-Ho (Gyeongbuk Institute for Bioindustry) ;
  • Kim, Sung-Hee (Department of Animal Disease Control & Quarantine, Animal and Plant Quarantine Agency) ;
  • Lim, Jae-Hwan (Department of Biological Sciences, Andong National University)
  • Received : 2018.01.15
  • Accepted : 2018.05.21
  • Published : 2018.05.30
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Abstract

Swine influenza virus (SIV) causes one of the most common diseases of the pig population, and its subtypes are determined by hemagglutinin (HA) and neuraminidase (NA). Recently, the SIV subtype diagnosis has been developed. The method using antigen-antibody reaction rather than PCR was mainly used because of the large change in the ribonucleotide sequences of SIV. Here, we have developed 10 diagnostic primer sets through multi-nucleotide sequences alignment of spreaded SIV since 2008 in Korea and then optimized the reaction of the one-step RT-PCR for rapid determination of SIV subtype. In addition, specific primers were designed to early determine the pandemic SIV by detecting unique M sequences proven in highly infectious and virulent subtypes of the influenza H1N1 (pH1N1). Here, some of the SIVs spread in Korea from 2008 to 2014 have been tested to determine the subtypes and pandemic potential of SIV. All diagnostic primer sets were found to be able to accurately determine the SIV subtype and to detect the pandemic SIV. In conclusion, it was confirmed that the optimized one-step RT-PCR analysis using these primer sets is useful for rapid diagnosis of SIV subtypes. These results can be used for development of SIV subtype diagnostic kit to early detect before virulent SIV spreads do.

Swine influenza virus (SIV)는 돼지 개체군에서 가장 흔한 질병을 일으키는 바이러스 중 하나이며 그 subtype은 hemagglutinin (HA)와 neuraminidase (NA)에 의해 결정됩니다. 최근 SIV subtype 진단 방법이 개발되고 있으나 SIV의 리보뉴클레오타이드 서열의 많은 변이로 인해 PCR 보다는 항원-항체 반응을 이용하는 방법이 주로 사용되고 있다. 본 연구에서는 SIV 하위 유형의 신속한 결정을 위하여 2008년 이후 국내에서 발생한 SIV의 다중염기서열 정렬을 통하여 10개의 subtype 진단 프라이머 세트를 개발하고 이를 이용한 one-step RT-PCR 반응을 최적화하였다. 또한 감염력이 높고 독성이 있는 인플루엔자 H1N1 (pH1N1)의 아형에서 확인된 독특한 M 유전자서열을 검출함으로써 pandemic SIV를 조기에 결정하도록 특이적 프라이머를 설계하였다. 2008년부터 2014년까지 한국에서 발생한 9종의 SIV RNA를 활용하여 SIV의 아형 및 pandemic 가능성을 결정하기 위해 시험 분석한 결과 모든 진단 프라이머 세트는 SIV 아형을 정확하게 결정하였으며 pandemic SIV를 검출할 수 있는 것으로 확인되었다. 결과적으로 이들 프라이머 세트를 이용한 최적화된 one-step RT-PCR 분석이 SIV 아형의 신속한 진단에 유용하다는 것이 확인하였다. 이러한 결과는 SIV 하위 유형 및 pandemic SIV가 확산되기 전에 조기 발견을 위한 키트로 개발될 수 있음을 시사한다.

Keywords

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