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Comparison of Three Viral Nucleic Acid Extraction Methods from Boar Semen

YU Xiao-lu1,2,CHEN Ru1,XUE Chun-yi2,DUAN Yan-yu1,SONG Chang-xu3,GAO Xiao-bo4,CAO Yong-chang2   

  1. (1.Guangdong Entry-exit Inspection and Quarantine Bureau,Guangzhou 510623,China;2.School of Life Sciences,Sun Yat-Sen University,Guangzhou 510275,China;3.Research Institute of Veterinary Medicine,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China;4.National Research Institute for Family Planning,Beijing 100081,China)
  • Received:2013-06-26 Online:2014-02-20 Published:2014-03-27

Abstract: Pseudorabies virus (PRV) and porcine reproductive and respiratory syndrome virus (PRRSV) were used as representatives of DNA and RNA viruses, respectively. Healthy semen was spiked with viruses, and then nucleic acids were extracted using following methods, semen pretreatment combined with silicon colunm kit extraction (referred to column kit method),optimized TRIzol reagent procedure and a published method. The efficiency of each method was evaluated by Real-time fluorescent RT-PCR or PCR. The results indicated that the column kit method was more sensitive and useful in viral nucleic acids extraction procedure. The limit in natural semen and commercialized semen were 1.26 and 0.13 TCID50/mL by Real-time fluorescent RT-PCR or PCR detection, respectively. The column kit method including sample pretreatment took less than 1 h, which was 0.5 h shorter than TRIzol procedure. This research established and optimized the method of extracting viral nucleic acid from boar semen.

Key words: boar semen;viral nucleic acid extraction; Real-time fluorescent RT-PCR; Real-time fluorescent PCR