1251906-10-1

AS2553627 is a novel JAK inhibitor. AS2553627 prevents chronic rejection in rat cardiac allografts. AS2553627 potently inhibited JAK kinases but showed no inhibition of other kinases, including TCR-associated molecules. In a rat cardiac transplant model, oral administration of AS2553627 alone or co-administration with a sub-therapeutic dose of tacrolimus effectively prolonged cardiac allograft survival, suggesting the efficacy in treating acute rejection. AS2553627 may be a therapeutic candidate for the prevention of not only acute but also chronic rejection in cardiac transplantation.

AS2553627 是一种 JAK 抑制剂，对 JAK1、JAK2、JAK3 和 TYK2 的 IC50 值分别为 0.46、0.30、0.14 和 2.0 nM。AS2553627 可以抑制 IL-2 刺激的人和大鼠 T 细胞的增殖，IC50 值分别为 2.4 和 4.3 nM。AS2553627 可以在大鼠心脏移植模型中减少心脏异体血管病变和纤维化并有效延长存活率。AS2553627 可以用于预防心脏移植中急性和慢性排斥反应。