NULOJIX (belatacept), a selective T cell costimulation blocker, is a soluble fusion protein consisting of the modified extracellular domain of CTLA-4 fused to a portion (hinge-CH2-CH3 domains) of the Fc domain of a human immunoglobulin G1 antibody. Belatacept is produced by recombinant DNA technology in a mammalian cell expression system. Two amino acid substitutions (L104 to E; A29 to Y) were made in the ligand binding region of CTLA-4. As a result of these modifications, belatacept binds CD80 and CD86 more avidly than abatacept, the parent CTLA4-Immunoglobulin (CTLA4-Ig) molecule from which it is derived. The molecular weight of belatacept is approximately 90 kilodaltons.
NULOJIX (belatacept) Lyophilized powder for injection: 250 mg per vial
Dosing for Initial Phase Dose Day 1 (day of transplantation, prior to implantation) and Day 5 (approximately 96 hours after Day 1 dose) 10 mg per kg End of Week 2 and Week 4 after transplantation 10 mg per kg End of Week 8 and Week 12 after transplantation 10 mg per kg Dosing for Maintenance Phase Dose End of Week 16 after transplantation and every 4 weeks (plus or minus 3 days) thereafter 5 mg per kg.
NULOJIX (belatacept) is a selective T cell costimulation blocker indicated for prophylaxis of organ rejection in adult patients receiving a kidney transplant.
