N- Method for preparing recombinant glycoproteins with improved N-glycan antennary structure by inhibiting biosynthesis of polylactosamine

摘要

In the present invention, it was confirmed that polylactosamine was reduced in recombinant human-derived erythropoietin produced by inhibiting (knocking down) the expression of the β3gnt2 gene, which is involved in polylactosamine biosynthesis, or from a cell line with the knocked out β3gnt2 gene, and thus triple and/or quadruple antenna structures of N-glycan increased, leading to positive roles in increasing the half-life of glycoprotein and the efficacy of glycoprotein. Therefore, it was confirmed that a recombinant glycoprotein with an increased half-life can be produced through the method of the present invention.