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The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Real-Time AT-PCR for Quantitative Detection of Bovine Parainfluenza Virus Type 3 during the Manufacture of Biologics

생물의약품 제조공정에서 Bovine Parainfluenza Virus Type 3 정량 검출을 위한 Real-Time RT-PCR

  • Lee, Dong-Hyuck (Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University) ;
  • Kim, Chan-Kyong (Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University) ;
  • Kim, Tae-Eun (Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University) ;
  • Kim, In-Seop (Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University)
  • 이동혁 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김찬경 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김태은 (한남대학교 생명.나노과학대학 생명과학과) ;
  • 김인섭 (한남대학교 생명.나노과학대학 생명과학과)
  • Published : 2008.08.29
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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 have the risk of viral contamination. Therefore viral validation is essential in ensuring the safety of the products. Bovine parainfluenza virus type 3 (BPIV3) is one of the common bovine pathogens and has widely been known as a contaminant of biologics. In order to establish the validation system for the BPIV3 safety of biologics, a real-time RT-PCR method was developed for quantitative detection of BPIV3 contamination in raw materials, manufacturing processes, and final products. Specific primers for amplification of BPIV3 RNA was selected, and BPIV3 RNA was quantified by use of SYBR Green I. The sensitivity of the assay was calculated to be 2.8 $TCID_{50}/mL$. The real-time RT-PCR method was validated to be reproducible and very specific to BPIV3. The established real-time RT-PCR assay was successfully applied to the validation of Chinese hamster ovary (CHO) cell artificially infected with BPIV3. BPIV3 RNA could be quantified in CHO cell as well as culture supernatant. Also the real-time RT-PCR assay could detect 7.8 $TCID_{50}/mL$ of BPIV3 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 BPIV3 contamination during the manufacture of biologics.

소의 혈액, 세포, 조직, 기관 등 소유래 물질을 원료로 사용한 생물의약품, 조직공학제제, 세포치료제의 경우 소유래 원료물질에 다양한 바이러스가 오염된 사례가 있기 때문에 바이러스 안전성 검증이 필수적이다. BPIV3는 동물 세포주, 우혈청 등에 가장 흔하게 오염되는 바이러스이다. 소유래 물질을 원료로 하는 생물의약품, 조직공학제제, 세포치료제 등에서 BPIV3 안전성을 확보하기 위해, 원료물질, 제조공정, 완제품에서 BPIV3를 정량적으로 검출하고, 제조공정에서 BPIV3 제거 검증을 위한 시험법으로 활용이 가능한 BPIV3 real-time RT-PCR 시험법을 확립하였다. BPIV3에 특이적인 primer를 선별하였으며, 형광염료 SYBR Green I을 사용하여 BPIV3 RNA 정량 검출 시험법을 최적화하였다. 세포배양법에 의한 감염역가와 비교한 결과 real-time RT-PCR 민감도는 2.8 $TCID_{50}/mL$이었다. 확립된 시험법의 신뢰성 (reliability)을 보증하기 위해 시험법 검증을 실시한 결과 특이성 (specificity)과 재현성 (reproducibility)이 우수함을 확인하였다. 확립된 real-time RT-PCR을 생물의 약품 제조공정 검증에 적용할 수 있는지 확인하기 위하여 인위적으로 BPIV3를 오염시킨 CHO 세포주와 소유래 콜라겐에서 BPIV3 검출 시험을 실시하였다. BPIV3를 감염시킨 CHO 세포와 세포배양 상청액에서 BPIV3를 정량적으로 검출할 수 있었다. 소유래 콜라겐에서도 7.8 $TCID_{50}/mL$ 까지 정량적으로 검출할 수 있었다. 위와 같은 결과에서 확립된 BPIV3 real-time RT-PCR 시험법은 생물의약품 안전성 보증을 위한 세포주 검증, 생물의약품 생산 공정 검증, 바이러스 제거 공정 검증 등에서 감염역가 시험법과 같은 생물학적 시험법을 대신할 수 있는 신속하고, 특이성과 민감성이 우수한 시험법임을 확인하였다.

Keywords

References

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