Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Real-Time RT-PCR for Quantitative Detection of Bovine Viral Diarrhoea Virus during Manufacture of Biologics

생물의약품 제조공정에서 Bovine Viral Diarrhoea Virus 정량 검출을 위한 Real-Time RT-PCR

  • Cho, Hang-Mee (Department of Biological Sciences, Hannam University) ;
  • Lee, Dong-Hyuck (Department of Biological Sciences, Hannam University) ;
  • Kim, Hyun-Mi (Department of Biological Sciences, Hannam University) ;
  • Kim, In-Seop (Department of Biological Sciences, Hannam University)
  • 조항미 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 이동혁 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김현미 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김인섭 (한남대학교 생명.나노과학대학 생명과학과)
  • Published : 2008.03.28
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Abstract

Bovine blood, cell, tissue, and organ are used as raw materials for manufacturing biologics such as biopharmaceuticals, tissue engineered products, and cell therapy. Manufacturing processes for the biologics using bovine materials have the risk of viral contamination. Therefore viral validation is essential in ensuring the safety of the products. Bovine viral diarrhoea virus (BVDV) is the most common bovine pathogen and has widely been known as a contaminant of biologics. In order to establish the validation system for the BVDV safety of biologics, a real-time RT-PCR method was developed for quantitative detection of BVDV contamination in raw materials, manufacturing processes, and final products. Specific primers for amplification of BVDV RNA was selected, and BVDV RNA was quantified by use of SYBR Green I. The sensitivity of the assay was calculated to be 1 $TCID_{50}/mL$. The rent-time RT-PCR method was validated to be reproducible and very specific to BVDV. The established real-time RT-PCR assay was successfully applied to the validation of Chinese hamster ovary (CHO) cell artificially infected with BVDV. BVDV RNA could be quantified in CHO cell as well as culture supernatant. Also the real-time RT-PCR assay could detect $10TCID_{50}/mL$ of BVDV artificially contaminated in bovine collagen.

소의 혈액, 세포, 조직, 기관 등 소 유래 물질을 원료로 사용한 생물의약품, 조직공학제제, 세포치료제의 경우 소 유래원료 물질에 다양한 바이러스가 오염된 사례가 있기 때문에 바이러스 안전성 검증이 필수적이다. BVDV는 동물세포주, 우혈청 등에 가장 흔하게 오염되는 바이러스이다. 소 유래물질을 원료로 하는 생물의약품, 조직공학제제, 세포치료제 등에서 BVDV안전성을 확보하기 위해, 원료물질, 제조공정, 완제품에서 BVDV를 정량적으로 검출하고, 제조공정에서 BVDV제거 검증을 위한 시험법으로 활용이 가능한 BVDV real-time RT-PCR시험법을 확립하였다. BVDV에 특이적인 primer를 선별하였으며, 형광염료 SYBR Green I을 사용하여 BVDV RNA 정량 검출 시험법을 최적화하였다. 세포배양법에 의한 감염역가와 비교한 결과 real-time RT-PCR 민감도는 $1TCID_{50}/mL$이었다. 확립된 시험법의 신뢰성(reliability)을 보증하기 위해 시험법 검증을 실시한 결과 특이성 (specificity)과 재현성(reproducibility)이 우수함을 확인하였다. 확립된 real-time RT-PCR을 생물의약품 제조공정 검증에 적용할 수 있는지 확인하기 위하여 인위적으로 BVDV를 오염시킨 CHO 세포주와 소 유래콜라겐에서 BVDV검출 시험을 실시하였다. BVDV를 감염시킨 CHO 세포와 세포배양 상청액에서 BVDV를 정량적으로 검출할 수 있었다. 소 유래 콜라겐에서도 $10TCID_{50}/mL$까지 정량적으로 검출할 수 있었다.

Keywords

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