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Modified recombinant human erythropoietin with potentially reduced immunogenicity.

Abstract：

:Recombinant human erythropoietin (rHuEPO) is a biopharmaceutical drug given to patients who have a low hemoglobin related to chronic kidney disease, cancer or anemia. However, some patients repeatedly receiving rHuEPO develop anti-rHuEPO neutralizing antibodies leading to the development of pure red cell aplasia (PRCA). The immunogenic antibody response activated by rHuEPO is believed to be triggered by T-cells recognizing EPO epitopes bound to MHC molecules displayed on the cell surface of APCs. Previous studies have reported an association between the development of anti-rHuEpo-associated PRCA and the HLA-DRB1*09 gene, which is reported to be entrenched in the Thai population. In this study, we used computational design to screen for immunogenic hotspots recognized by HLA-DRB1*09, and predicted seventeen mutants having anywhere between one through four mutations that reduce affinity for the allele, without disrupting the structural integrity and bioactivity. Five out of seventeen mutants were less immunogenic in vitro while retaining similar or slightly reduced bioactivity than rHuEPO. These engineered proteins could be the potential candidates to treat patients who are rHuEpo-dependent and express the HLA-DRB1*09 allele.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Susantad T,Fuangthong M,Tharakaraman K,Tit-Oon P,Ruchirawat M,Sasisekharan R

doi

10.1038/s41598-020-80402-1

subject

Has Abstract

pub_date

2021-01-15 00:00:00

pages

1491

issue

1

issn

2045-2322

pii

10.1038/s41598-020-80402-1

journal_volume

11

pub_type

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