Small molecules for Kirsten rat sarcoma viral oncogene homolog mutant cancers: Past, present, and future. (PubMed, Eur J Pharmacol)
However, due to the lack of a binding pocket, KRAS has long been considered an undruggable target in recent decades until the discovery of Sotorasib (AMG510). With the approval of Glecirasib (JAB-21822), there are three approved small molecule inhibitors of KRAS, all of which are KRAS G12C inhibitors. At the same time, the limited clinical benefits and rapid emergence of drug resistance to the approved inhibitors have also promoted the emergence of more therapeutics, such as tri-complexes and proteolysis-targeting chimeras (PROTAC). In this paper, we summarize the development of KRAS inhibitors (KRASG12C, KRASG12D, and KRASmulti inhibitors, PROTAC, and tri-complex) and discuss the challenges and opportunities in the discovery of KRAS inhibitors in the hope of providing insights into the development of novel medications for KRAS.