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etanercept

A recombinant soluble dimeric fusion protein consisting of the extracellular ligand-binding region of recombinant human tumor necrosis factor (rhTNF) receptor attached to the constant (Fc) region of human immunoglobulin G (FcIgG). The receptor moiety of etanercept binds to circulating TNF (2 molecules of TNF per receptor) and inhibits its attachment to endogenous TNF cell surface receptors, thereby rendering TNF inactive and inhibiting TNF-mediated mechanisms of inflammation.

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Synonym:	Tumor Necrosis Factor Receptor IgG Chimera
US brand name:	Enbrel
Abbreviation:	ETN TNFR:Fc

etanercept

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