For the management of the signs and symptoms of moderate-to-severe active rheumatoid arthritis, inducing major clinical response, slowing the progression of structural damage, and improving physical function in adult patients. It is indicated both as a monotherapy and for use in combination with a continued regimen of DMARDs (not including TNF antagonists). Also used for the management of the signs and symptoms of moderately to severely active polyarticular juvenile idiopathic arthritis in children.
Abatacept is a selective costimulation modulator, like CTLA-4, the drug has shown to inhibit T-cell (T lymphocyte) activation by binding to CD80 and CD86, thereby blocking interaction with CD28. Blockade of this interaction has been shown to inhibit the delivery of the second co-stimulatory signal required for optimal activation of T-cells. This results in the inhibition of autoimmune T-Cell activation that has been implcated in the pathogenesis of rheumatoid arthritis.
Doses up to 50 mg/kg have been administered without apparent toxic effect.
16.7 (12-23) days in healthy subjects, 13.1 (8-25) days in RA subjects.
* 0.02-0.13 L/kg [RA Patients] * 0.06-0.13 L/kg [Healthy Subjects]
* 0.23 mL/h/kg [Healthy Subjects after 10 mg/kg Intravenous Infusion] * 0.22 mL/h/kg [RA Patients after multiple 10 mg/kg Intravenous Infusions] * 0.4 mL/h/kg [juvenile idiopathic arthritis patients]