Enhancing the sialylation of recombinant EPO produced in CHO cells via the inhibition of glycosphingolipid biosynthesis.
Enhancing the sialylation of recombinant EPO produced in CHO cells via the inhibition of glycosphingolipid biosynthesis.
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DOI:
10.1038/s41598-017-13609-4
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发表时间:
2017-10-12
影响因子:
4.6
通讯作者:
Kim JH
中科院分区:
文献类型:
--
作者:
Kwak CY;Park SY;Lee CG;Okino N;Ito M;Kim JH
Sialylation regulates the in vivo half-life of recombinant therapeutic glycoproteins, affecting their therapeutic efficacy. Levels of the precursor molecule cytidine monophospho-N-acetylneuraminic acid (CMP-Neu5Ac) are considered a limiting factor in the sialylation of glycoproteins. Here, we show that by reducing the amount of intracellular CMP-Neu5Ac consumed for glycosphingolipid (GSL) biosynthesis, we can increase the sialylation of recombinant human erythropoietin (rhEPO) produced in CHO cells. Initially, we found that treating CHO cells with a potent inhibitor of GSL biosynthesis increases the sialylation of the rhEPO they produce. Then, we established a stable CHO cell line that produces rhEPO in the context of repression of the key GSL biosynthetic enzyme UDP-glucose ceramide glucosyltransferase (UGCG). These UGCG-depleted cells show reduced levels of gangliosides and significantly elevated levels of rhEPO sialylation. Upon further analysis of the resulting N-glycosylation pattern, we discovered that the enhanced rhEPO sialylation could be attributed to a decrease in neutral and mono-sialylated N-glycans and an increase in di-sialylated N-glycans. Our results suggest that the therapeutic efficacy of rhEPO produced in CHO cells can be improved by shunting intracellular CMP-Neu5Ac away from GSL biosynthesis and toward glycoprotein sialylation.
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影响因子:
2.9
作者:
ANUMULA, KR
通讯作者:
ANUMULA, KR
影响因子:
64.5
作者:
DEUTSCHER, SL;NUWAYHID, N;HIRSCHBERG, CB
通讯作者:
HIRSCHBERG, CB
影响因子:
1.7
作者:
Fedoryszak-Kuska, Natalia;Panasiewicz, Miroslawa;Pacuszka, Tadeusz
通讯作者:
Pacuszka, Tadeusz
影响因子:
3.1
作者:
Park, Seung-Yeol;Yoon, Seon-Joo;Hakomori, Sen-itiroh
通讯作者:
Hakomori, Sen-itiroh
影响因子:
4.3
作者:
Son, Young-Dok;Jeong, Yeon Tae;Kim, Jung Hoe
通讯作者:
Kim, Jung Hoe