Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Real-Time PCR for Quantitative Detection of Bovine Herpesvirus Type 1

Bovine Herpesvirus Type 1 정량 검출을 위한 Real-Time PCR

  • Lee, Dong-Hyuck (Department of Biological Sciences, Hannam University) ;
  • Jeong, Hyo-Sun (Tissue Engineering Division, Research and Development Dept., Hans Daedeok R&D Center, Hans Biomed Corp.) ;
  • Lee, Jung-Hee (Department of Biological Sciences, Hannam University) ;
  • Kim, Tae-Eun (Department of Biological Sciences, Hannam University) ;
  • Lee, Jung-Suk (Tissue Engineering Division, Research and Development Dept., Hans Daedeok R&D Center, Hans Biomed Corp.) ;
  • Kim, In-Seop (Department of Biological Sciences, Hannam University)
  • 이동혁 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 정효선 (한스바이오메드(주) 한스대덕연구소) ;
  • 이정희 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김태은 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 이정숙 (한스바이오메드(주) 한스대덕연구소) ;
  • 김인섭 (한남대학교 생명.나노과학대학 생명과학과)
  • Published : 2008.03.31
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Abstract

Bovine blood, cell, tissue, and organ are used as raw materials for manufacturing biopharmaceuticals, tissue engineered products, and cell therapy. Manufacturing processes for the biologicals using bovine materials have the risk of viral contamination. Therefore viral validation is, essential in ensuring the safety of the products. Bovine herpesvirus type 1 (BHV-1) is the most common bovine pathogen found in bovine blood, cell, tissue, and organ. In order to establish the validation system for the BHV-1 safety of the products, a real-time PCR method was developed for quantitative detection of BHV-1 in raw materials, manufacturing processes, and final products as well as BHV-1 clearance validation. Specific primers for amplification of BHV-1 DNA was selected, and BHV-1 DNA was quantified by use of SYBR Green I. The sensitivity of the assay was calculated to be $2\;TCID_{50}/ml$. The real-time PCR method was validated to be reproducible and very specific to BHV-1. The established real-time PCR assay was successfully applied to the validation of Chinese hamster ovary (CHO) cell artificially infected with BHV-1. BHV-1 DNA could be quantified in CHO cell as well as culture supernatant. Also the real-time PCR assay could detect $10\;TCID_{50}/ml$ of BHV-1 artificially contaminated in bovine collagen. The overall results indicated that this rapid, specific, sensitive, and robust assay can be reliably used for quantitative detection of BHV-1 contamination during the manufacture of biologics.

소의 혈액, 세포, 조직, 기관 등은 생물의약품과 조직공학제제, 세포치료제의 원료로 널리 사용되고 있다. 소유래 물질을 원료로 사용한 제제의 경우 소유래 원료 물질에 다양한 바이러스가 오염된 사례가 있기 때문에 바이러스 안전성 검증이 필수적이다. Bovine herpesvirus type 1 (BHV-1)은 소에게 가장 흔하게 감염되는 바이러스중의 하나이다. 소유래 물질을 원료로 하는 생물의약품, 조직공학제제, 세포치료제 등에서 BHV-1안전성을 확보하기 위해, 원료물질, 제조공정, 완제품에서 BHV-1을 정량적으로 검출하고, 제조공정에서 BHV-1 제거 검증을 위한 시험법으로 활용이 가능한 BHV-1 real-time PCR 시험법을 확립하였다. BHV-1에 특이적인 primer를 선별하였으며, 형광염료 SYBR Green I을 사용하여 BHV-1 DNA 정량 검출 시험법을 최적화하였다. 세포배양법에 의한 감염역가와 비교한 결과 real-time PCR 민감도는 $2\;TCID_{50}/ml$이었다. 확립된 시험법의 신뢰성(reliability)을 보증하기 위해 시험법 검증을 실시한 결과 특이성(specificity)과 재현성(reproducibility)이 우수함을 확인하였다. 확립된 real-time PCR을 생물의약품 제조공정 검증에 적용할 수 있는지 확인하기 위하여 인위적으로 BHV-1을 오염시킨 Chinese hamster ovary (CHO) 세포주와 소유래 콜라겐에서 BHV-1 검출 시험을 실시하였다. BHV-1을 감염시킨 CHO 세포에서 세포변병효과를 관찰할 수 없었지만, 세포와 세포배양 상청액에서 BHV-1을 정량적으로 검출할 수 있었다. 소유래 콜라겐에서도 $10\;TCID_{50}/ml$까지 정량적으로 검출할 수 있었다. 위와 같은 결과에서 확립된 BHV-1 real-time PCR 시험법은 생물의약품 안전성 보증을 위한 세포주 검증, 생물의약품생산공정 검증, 바이러스 제거 공정 검증 등에서 감염역가 시험법과 같은 생물학적 시험법을 대신할 수 있는 신속하고, 특이성과 민감성이 우수한 시험법임을 확인하였다.

Keywords

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