Immunoglobulin Fc domain fusion to apolipoprotein(a) kringle V significantly prolongs plasma half-life without affecting its anti-angiogenic activity

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Title
Immunoglobulin Fc domain fusion to apolipoprotein(a) kringle V significantly prolongs plasma half-life without affecting its anti-angiogenic activity
Author(s)
H K Yu; H J Lee; J H Ahn; I H Lim; J H Moon; Y Yoon; L S H Yi; S J Kim; Jang Seong Kim
Bibliographic Citation
Protein Engineering Design & Selection, vol. 26, no. 6, pp. 425-432
Publication Year
2013
Abstract
Angiogenesis is crucial for tumor growth and metastasis. Blocking this process is, therefore, a potentially powerful approach for the treatment of cancer. Human apolipoprotein(a) kringle V (rhLK8) is an angiogenesis inhibitor and is currently under development as an anti-cancer therapeutic. However, a relatively short in vivo half-life limits its widespread clinical use. This study was performed to evaluate whether fusion of an Fc domain to rhLK8 can extend plasma half-life. RhLK8-Fc fusion protein was expressed in CHO DG44 cells as a dimer and was readily purified by protein G affinity chromatography. The anti-angiogenic activity of rhLK8-Fc was similar to that of rhLK8, as determined by migration and tube formation assays with endothelial cells in vitro and a chorioallantoic membrane assay in vivo. Pharmacokinetic profiles in mice after single intravenous administration of rhLK8 or rhLK8-Fc showed that Fc fusion significantly increased the elimination half-life (t1/2) and the systemic exposure (AUCinf) of the protein, in parallel with a significant decrease in total clearance (CL). These data suggest that Fc fusion to rhLK8 is a powerful strategy for extending the plasma half-life of rhLK8 without affecting its anti-angiogenic activity, and could thus improve the clinical applicability of rhLK8.
Keyword
angiogenesis inhibitorsapolipoprotein (a)Fc fusion proteinskringlepharmacokinetics
ISSN
1741-0126
Publisher
Oxford Univ Press
DOI
http://dx.doi.org/10.1093/protein/gzt015
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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