ISSN:
1573-0778
Schlagwort(e):
CHO cells
;
erythropoietin
;
glycosylation
;
glutamine
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Medizin
,
Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
Notizen:
Abstract The molecular heterogeneity of recombinant humanerythropoietin (EPO) increased during the course of abatch culture of transfected Chinese hamster ovary(CHO) cells grown in serum-free medium. This wasshown by both an increased molecular weight and pIrange of the isolated EPO at the end of the culture. However, analysis of the N-glycan structures of themolecule by fluorophore-assisted carbohydrateelectrophoresis (FACE) and HPLC anion exchangechromatography indicated a consistent pattern ofglycosylation. Seven glycoforms were identified, thepredominant structure being a fully sialylatedtetra-antennary glycan. The degree of sialylationwas maintained throughout the culture. Analysis ofthe secreted EPO indicated a time-dependent increasein the molecular weight band width of the peptideconsistent with proteolytic degradation. A highglutamine concentration (16–20 mM) in the culturedecreased the apparent degradation of the EPO.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1008137712611
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