Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Real-Time PCR for Validation of Minute Virus of Mice Safety during the Manufacture of Mammalian Cell Culture-Derived Biopharmaceuticals

세포배양 유래 생물의약품 생산 공정에서 Minute Virus of Mice 안전성 검증을 위한 Real-Time PCR

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

Validation of viral safety is essential in ensuring the safety of mammalian cell culture-derived biopharmaceuticals, because numerous adventitious viruses have been contaminated during the manufacture of the products. Mammalian cells are highly susceptible to minute virus of mice(MVM), and there are several reports of MVM contamination during the manufacture of biopharmaceuticals. In order to establish the validation system for the MVM safety, a real-time PCR method was developed for quantitative detection of MVM in cell lines, raw materials, manufacturing processes, and final products as well as MVM clearance validation. Specific primers for amplification of MVM DNA was selected, and MVM DNA was quantified by use of SYBR Green I. The sensitivity of the assay was calculated to be $6{\times}10^{-2}TCID_{50}/mL$. The real-time PCR method was proven to be reproducible and very specific to MVM. The established real-time PCR assay was successfully applied to the validation of Chinese hamster ovary (CHO) cell artificially infected with MVM. MVM DNA could be Quantified in CHO cell as well as culture supernatant. When the real-time PCR assay was applied to the validation of virus removal during a virus filtration process, the result was similar to that of virus infectivity assay. Therefore, it was concluded that this rapid, specific, sensitive, and robust assay could replace infectivity assay for detection and clearance validation of MVM.

세포배양 유래 생물의약품 생산 공정에서 다양한 바이러스가 오염된 사례가 있기 때문에 바이러스 안전성 검증이 필수적이다. MVM은 동물 세포주와 동물 세포 배양 공정에 오염되는 대표적인 바이러스이다. 세포배양 유래 생물의약품의 MVM 안전성을 확보하기 위해, 세포주, 원료물질, 제조공정, 완제품에서 MVM을 정량적으로 검출하고, 제조공정에서 MVM 제거 검증을 위한 시험법으로 활용이 가능한 real-time PCR 시험법을 확립하였다. MVM에 특이적인 primer를 선별하였으며, 형광염료 SYBR Green I을 사용하여 MVM DNA 정량 검출 시험법을 최적화하였다. 세포배양 법에 의한 감염역가와 비교한 결과 real-time PCR 민감도는 $6{\times}10^{-2}TCID_{50}/mL$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 MVM을 오염시킨 CHO 세포에서 MVM검출 시험을 실시한 결과 MVM을 감염시킨 CHO 세포와 세포배양 상청액에서 MVM을 정량적으로 검출할 수 있었다. 또한 바이러스 필터 공정에서 MVM제거 효과를 감염역가 시험법과 비교 검증한 결과 더 높은 민감도로 빠른 시간에 동일한 결과를 얻을 수 있었다. 위와 같은 결과에서 확립된 MVM real-time PCR시험법은 생물의약품 안전성 보증을 위한 세포주 검증, 생물의약품 생산 공정 검증, 바이러스 제거 공정 검증 등에서 감염역가 시험법을 대신할 수 있는 신속하고, 특이성과 민감성이 우수한 시험법임을 확인하였다.

Keywords

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