Differences in Proportion of N-acetyllactosamine and O-acetylated Sialic Acid Have No Significant Effect on the Pharmacokinetics and Biological Activity of Darbepoetin Alfa

被引:0
作者
Won Jeong Lee
Hookeun Oh
Inseong Choi
Keunho Lee
Hyunwoo Shin
Yoon Jung Lee
Jeehye Park
Yoo Hee Yang
Gyong-Sik Ha
Dong-Eok Lee
Kang-Yell Choi
Eunyoung Choi
机构
[1] Biopharmaceutical Research Center,Graduate Program in Biomaterials Science and Engineering
[2] HK inno.N,The Division of Life Sciences, the Graduate School
[3] Yonsei University,undefined
[4] Pharmaceutical Analysis Center,undefined
[5] HK inno.N,undefined
[6] Drug Evaluation Center,undefined
[7] HK inno.N,undefined
[8] Yonsei University,undefined
来源
Biotechnology and Bioprocess Engineering | 2022年 / 27卷
关键词
darbepoetin alfa; N-acetyllactosamine; O-acetylated sialic acid; pharmacokinetics; biological activity;
D O I
暂无
中图分类号
学科分类号
摘要
Darbepoetin alfa is used to treat anemia in patients with chronic renal failure and is a therapeutic glycoprotein with five N-glycosylation sites and one O-glycosylation site. Since the glycosylation of therapeutic proteins is known to affect pharmacokinetics and biological activity, it was wondered how the certain glycosylation structure of darbepoetin alfa affects pharmacokinetics and biological activity. To investigate the effects of glycosylation structures, several darbepoetin alfa samples were generated through the processes slightly modified from HK-DPO production process. Analysis of N-linked glycosylation profiles showed that darbepoetin alfa samples have different proportions of N-acetyllactosamine and O-acetylated sialic acids. Since these structures were known to affect the stability and efficacy of glycoproteins, we evaluated the pharmacokinetics and biological activities of darbepoetin alfa samples. As a result of pharmacokinetics, the time course of the concentration in plasma was similar to that of NESP®, commercially available darbepoetin alfa. Also, the relative AUClast ratio (sample/reference) was ranged from 84% to 114%, which indicated they did not have meaningful differences. For in vitro biological activity, a cell proliferation test was conducted in the EPO-dependent F36E cell-line. An in vivo biological activity test was performed with EP-based assay using B6D2F1 female mice. As a result, the biological activities of each samples were similar to those of reference drug, NESP®. In conclusion, different proportions of N-acetyllactosamine and O-acetylation of sialic acid in darbepoetin alfa did not show any meaningful effects on pharmacokinetics and biological activities.
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页码:244 / 252
页数:8
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