distributed in both intestines and lungs. Molecular docking studies revealed a higher affinity of PCC0208023 with key residues in the SHP2 allosteric pocket than RMC-4550. PCC0208023 deserves further optimization to identify additional low-toxic and potent SHP2 allosteric inhibitors with novel scaffolds for the treatment of patients with KRAS mutation-positive colorectal cancer.
由
PTPN11编码的非受体
酪氨酸磷酸酶SHP2在致癌性KRAS突变驱动的肿瘤中起着必不可少的作用,这种突变经常发生在大肠癌中。在这里,合成了
PCC0208023,一种有效的SHP2变构
抑制剂,以评估其在体外和体内对SHP2酶和KRAS突变型结肠直肠癌的抑制作用,并评估其对RAS /
MAPK途径的作用。与别构抑制方式一致,
PCC0208023可以非竞争性地抑制全长SHP2酶的活性,但缺乏针对SHP2游离催化域的活性。此外,
PCC0208023通过在体外抑制RAS /
MAPK信号通路来抑制KRAS突变驱动的人结肠直肠癌细胞的增殖。重要的,
PCC0208023对KRAS驱动的LS180和HCT116异种移植模型在裸鼠中显示出良好的抗肿瘤功效,其中Ki67和p-ERK
水平降低,并且在肿瘤中切割的caspase-3表达增加。有趣的是,
PCC0208023在给药后24小时内在LS180肿瘤中维持高