Abatacept (CTLA4lg) 是一种可溶性融合蛋白，由人 CTLA4 的胞外结构域和人 IgG1 Fc 部分的片段 (铰链，CH2 和 3 结构域) 组成。Abatacept 是选择性 T 细胞共刺激调节剂，也是一种用于自身免疫性疾病的蛋白药物。

Abatacept (CTLA4lg) is a soluble fusion protein consisting of the extra-cellular domain of human CTLA4 and a fragment of the Fc portion of human IgG1 (hinge and CH2 and 3 domains). Abatacept is a selective T-cell co-stimulation modulator and a protein drug for the autoimmune diseases.

Solid

Abatacept reduces paw edema, and the SC Multiple-dose group shows significantly greater (t obs = 2.50) paw edema reduction compared with the IV dose group.
Abatacept exhibits linear PK across the studied doses. The NCA clearance (CL) is 20.8 mL/day/kg, volume (V ss ) is 146 mL/kg, and bioavailability (F) of the SC dose dosing is 57.7%.
Abatacept (oral; 10 mg/kg; every 2 days) reduces the proportion of activated T cells (CD44highCD62L–) and inhibits the up-regulation of ICOS and CD71 in homozygous DO11.10 RAG-2BALB/c (H-2d/d) mice.
has not independently confirmed the accuracy of these methods. They are for reference only.

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[1]. Kiykim A, et al. Abatacept as a Long-Term Targeted Therapy for LRBA Deficiency. J Allergy Clin Immunol Pract. 2019 Jun 22.
[2]. Lon HK, et al. Modeling pharmacokinetics/pharmacodynamics of abatacept and disease progression in collagen-induced arthritic rats: a population approach. J Pharmacokinet Pharmacodyn. 2013 Dec;40(6):701-12.