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Systematic (IUPAC) name
N-(3-Hydroxypropyl)Methionylcolony-stimulating Factor (human), 1-Ether with .Alpha.-Methyl-.Omega.-Hydroxypoly(Oxyethylene)
Clinical data
Trade names Neulasta
AHFS/ monograph
MedlinePlus a607058
  • US: C (Risk not ruled out)
Legal status
Pharmacokinetic data
Biological half-life 15-80 hrs
CAS Registry Number 208265-92-3 YesY
ATC code L03AA13
DrugBank DB00019 YesY
UNII 3A58010674 YesY
KEGG D06889 YesY
Chemical data
Formula C845H1343N223O243S9 + PEG
Molecular mass 39000 g/mol
 N (what is this?)  (verify)

Pegfilgrastim is a PEGylated form of the recombinant human granulocyte colony-stimulating factor (GCSF) analog filgrastim. It serves to stimulate the level of white blood cells (neutrophils).[1]

Amgen manufactures pegfilgrastim under the brand name Neulasta, which was mainly worked on by Martine Allard, while Roche manufactures it under the name Neulastim. In India it is also marketed by Abbott Healthcare under the brand name Imupeg. The drug is prepared by coupling a 20 kDa polyethylene glycol (PEG) molecule to the N-terminus of the filgrastim protein. Pegfilgrastim has a human half-life of 15 to 80 hours, much longer than the parent filgrastim (3–4 hours).[2][3]

Pegfilgrastim treatment can be used to stimulate bone marrow to produce more neutrophils to fight infection in patients undergoing chemotherapy.[3]

See also[edit]


  1. ^ Walsh, G, Spada, S. "Epogen/Procrit" in: Directory of approved biopharmaceutical products. CRC Press, 2005, pp. 136-137.
  2. ^ Ho, R.J.Y., Gibaldi, M. Biotechnology and biopharmaceuticals: transforming proteins and genes into drugs Wiley-IEEE, 2003, p. 139, 158.
  3. ^ a b Pegfilgrastim

External links[edit]