NCIt definition : A long-acting form and covalent conjugate of recombinant human granulocyte colony-stimulating
factor (G-CSF) filgrastim with 30 kDa polyethylene glycol (PEG), with potential hematopoietic
activity. Upon administration, empegfilgrastim acts similarly to endogenous G-CSF
and binds to and activates specific cell surface receptors, stimulating neutrophil
progenitor proliferation and differentiation and selected neutrophil functions. Therefore,
this agent may prevent the incidence and shorten the duration of chemotherapy-induced
neutropenia. Conjugation of the cytokine with a PEG molecule significantly increases
this agent's therapeutic half-life compared to filgrastim.;