The combination of ERAS-601 with gilteritinib achieves a more durable tumor growth inhibition than the respective gilteritinib and ERAS-601 monotherapies in vivo. These preclinical data support the clinical development of ERAS-601 in combination with gilteritinib in FLT3-altered AML.
ERAS-601 also inhibits tumor growth in multiple RAS/MAPK-driven CDX and PDX models that harbor EGFR, KRAS, BRAF Class III, and NF1LOF mutations. ERAS-601 is a potent and selective allosteric SHP2 inhibitor that demonstrates anti-tumor activity in vitro and in vivo and is currently being studied as a monotherapy in an ongoing Phase 1 clinical study in patients with advanced or metastatic solid tumors (FLAGSHP-1, NCT04670679).
These nonclinical data support the clinical development of ERAS-601 in combination with a KRASG12C inhibitor in NSCLC and CRC tumors, and ERAS-601 in combination with cetuximab in RAS/RAF wild type CRC as well as HPV-negative HNSCC tumors. Both combinations are being studied in ongoing clinical studies (HERKULES-2, NCT04959981; FLAGSHP-1, NCT04670679).
In KRAS mutant CDX and PDX models, this MAPKlamp’s in vitro activity was observed in vivo where it achieved superior tumor growth inhibition and tumor regression relative to ERAS-601 and ERAS-007 monotherapy. This MAPKlamp showed in vitro and in vivo combination activity in KRAS mutant tumors, and these results support its clinical evaluation in RAS/MAPK pathway-driven tumors.