abatacept
noun
aba·tac·ept
| \ ˌab-ə-ˈta-ˌsept
\
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Medical Definition of abatacept
: a protein drug that inhibits the activation of T cells and is administered by injection in the treatment of rheumatoid arthritis
Note: Abatacept is a synthetic protein produced by recombinant DNA technology in which the extracellular domain of a receptor found on the surface of T cells is linked to a modified portion of IgG. Abatacept is marketed under the trademark Orencia.