Chung-Geun Lee, Myung Jin Oh, Seung-Yeol Park, Hyun Joo An, Jung Hoe Kim
언어
영어(ENG)
URL
https://www.earticle.net/Article/A346310
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원문정보
초록
영어
Sialylation modulates pharmacokinetic properties of recombinant therapeutic glycoproteins affecting their in VIVO half-life. N-glycan branching on glycoproteins provides the potential attachment sites for sialic acid. Here, we introduce a new approach for increasing the sialylation of recombinant human erythropoietin (rhEPO) produced m CHO cells by modulating poly-N-acetyllactosamine (poly-LacN Ac) biosynthesis. Initially, we found that repressiOn of the f33gnt2 increases tri- and tetra- N-glycan structures. We did not observe an mcrease in rhEPO sialylation, however, until the feedback inhibition by intracellular cytidinemonophosphate-N-acetylneuraminic acid ( CMP-N eu5Ac), which is a limiting factor for sialylation, was released. Thus, we found that a combined approach inhibiting poly-LacN Ac biosynthesis and releasing CMP-N eu5Ac feedback inhibition produces the most significant increase in rhEPO sialylation in metabolically engineered CHO cells. Furthermore, a detailed analysis of the resulting N -glycan structures using LC/MS revealed increased tri- and tetra- sialylated N-glycan structures accompanied by a reduction of di-sialylated N-glycan structures. These results validate our new approach for glycosylation engineering, and we expect this approach will be useful in future efforts to enhance the efficacy of other therapeutic glycoproteins.
저자
Chung-Geun Lee [ Department of Bjologjcal Sdences, Korea Advanced Insti'tute of Sdence and Technology, 2g1 Daehak-ro, Yuseong-gu, Daejeon 34141, Republjc of Korea. ]
Myung Jin Oh [ Graduate School of Analyti'cal Sdence &Technology, Chungnam Nati'onal Um.versdy, Asja-paciiic Glycomk·s Reference Sjte, Dae.feon 34134, Repubjjc of Korea ]
Seung-Yeol Park [ Djvjsjon of Rheumatology, hmnunology and Allergy, Bngham and Women's Hospilal, and Department of Medjdne, Harvard Medjcal School, Boston, MA 02115 USA ]
Hyun Joo An [ Graduate School of Analyti'cal Sdence &Technology, Chungnam Nati'onal Um.versdy, Asja-paciiic Glycomk·s Reference Sjte, Dae.feon 34134, Repubjjc of Korea ]
Jung Hoe Kim [ Department of Bjologjcal Sdences, Korea Advanced Insti'tute of Sdence and Technology, 2g1 Daehak-ro, Yuseong-gu, Daejeon 34141, Republjc of Korea. ]
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.