Ligand id: 6968

Name: filgrastim

Compound class Peptide or derivative
Approved drug? Yes (FDA (1991))
International Nonproprietary Names
INN number INN
6739 filgrastim
Filcad® | Imumax ® | R-METHUG-CSF
Database Links
Specialist databases
IMGT/mAb-DB 631
Other databases
ChEMBL Ligand CHEMBL1201567
DrugBank Ligand DB00099
GtoPdb PubChem SID 178103548
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Wikipedia Filgrastim
This is a recombinant version of human G-CSF. The peptide is produced in E. coli and is non-glycosylated, whereas the naturally occurring peptide has an O-linked carbohydrate chain attached to Thr133. The carbohydrate chain protects the native peptide from degradation by human neutrophil elastase [1]. Therefore, filgrastim is more quickly degraded and loses biological activity more rapidly in comparison to native G-CSF.

Biosimilar drugs: In March 2015, the US FDA approved the biosimilar drug, Zarxio® (filgrastim-sndz). Zarxio® is approved for the same indications as the reference product Neupogen®. This was the first biosimilar product to receive FDA approval. The potential for utilising filgrastim biosimilar agents in neutropenia management is discussed in [2].