Raw research findings for this medication. Mostly single studies, not curated or confirmed robust.
Abatacept is a biologic medicine built from the CTLA-4 protein fused to part of an antibody. It blocks the second signal T cells need to become fully active (co-stimulation), calming the immune attack. Given by drip or injection, it is used for rheumatoid arthritis, juvenile idiopathic arthritis and psoriatic arthritis, and to prevent graft-versus-host disease. It is sold as Orencia.
As a protein, abatacept is not broken down by drug-processing enzymes. Studies have looked at the HLA-DRB1 'shared epitope', the main inherited risk factor for rheumatoid arthritis, linked in some studies to a better response, and at the antibody receptor FCGR2A. The findings come from a few studies, and there is no CPIC or DPWG guideline.
Every published finding on gene variants and Abatacept. Upload your DNA file to see which of these rows apply to you.
Studies of how well it worked in people carrying a variant.
Study findings and evidence levels: PharmGKB (CC BY-SA 4.0). Guidelines: CPIC and DPWG, as bundled in PharmCAT. Most studies were done mainly in people of European ancestry.
More drugs from the same category
Not a prescribing recommendation. This page is educational information about pharmacogenomic research and clinical guidelines - it is not medical or dosing advice, and not a prediction of how any medication will work for you. Never start, stop, or change a medication or dose based on it; talk to your doctor or pharmacist, who can order clinical-grade testing if appropriate.
Content updated September 2026.
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