发现吡唑并[1,5-a]吡啶衍生物作为有效和选择性 PI3Kγ/δ 抑制剂。
Discovery of Pyrazolo[1,5-a]pyridine Derivatives as Potent and Selective PI3Kγ/δ Inhibitors.
发表日期:2024 Aug 20
作者:
Chun Wang, Fengming Zou, Ziping Qi, Qingwang Liu, Lijuan Shen, Xinyu Yuan, Maoqing Deng, Aoli Wang, Beilei Wang, Li Wang, Xiaofei Liang, Qingsong Liu, Jing Liu
来源:
Bone & Joint Journal
摘要:
PI3Kγ 和 PI3Kδ 通过靶向调节性 T 细胞和骨髓细胞发挥免疫抑制作用。 PI3Kγ 和 PI3Kδ 的双重抑制已成为癌症免疫治疗的一种新型治疗策略。我们在此报道了一系列具有独特支架的吡唑并吡啶衍生物,作为 PI3Kγ 和 PI3Kδ 的有效和选择性双重抑制剂。其中,20e (IHMT-PI3K-315) 在生化检测中对 PI3Kγ 和 PI3Kδ 的 IC50 值分别为 4.0 和 9.1 nM。同时,它能有效抑制 PI3Kγ 和 PI3Kδ 介导的 AKTS473 磷酸化,在细胞测定中 EC50 值为 0.028 和 0.013 μM。此外,20e 在 1 μM 的蛋白激酶中表现出良好的选择性。在骨髓源性巨噬细胞 (BMDM) 中,20e 可以将 M2 表型重新极化为 M1 表型。在体内,20e 在 MC38 同基因小鼠模型中表现出可接受的药代动力学特性并抑制肿瘤生长。
PI3Kγ and PI3Kδ plays critical roles in exerting immunosuppression by targeting regulatory T cells and myeloid cells. Dual inhibition of PI3Kγ and PI3Kδ has emerged as a novel therapeutic strategy for cancer immunotherapy. We herein report a series of pyrazolopyridine derivatives with distinct scaffolds as potent and selective dual inhibitors of PI3Kγ and PI3Kδ. Among them, 20e (IHMT-PI3K-315) displays an IC50 value of 4.0 and 9.1 nM against PI3Kγ and PI3Kδ respectively in biochemical assays. Meanwhile, it potently inhibits PI3Kγ and PI3Kδ-mediated phosphorylation of AKT S473 with EC50 values of 0.028 and 0.013 μM in cellular assays. In addition, 20e exhibits a favorable selectivity profile in protein kinases at 1 μM. In bone marrow-derived macrophages (BMDM), 20e can repolarize the M2 phenotype to the M1 phenotype. In vivo, 20e demonstrates acceptable pharmacokinetic properties and suppresses tumor growth in a MC38 syngeneic mouse model.