Importantly, in PK/PD studies, 39 exhibited a differentiated and favorable in vivo profile compared to the corresponding tyrosine kinase inhibitor (TKI), compound 3. Robust and sustained degradation of total-RET (tRET) protein and inhibition of phospho-RET (pRET) signaling were observed in TPC-1 xenograft tumors driven by RET and the RET/G810R mutant following a single dose of LDD 39 at 15 and 75 mg/kg, respectively.
1 month ago
Journal
|
RET (Ret Proto-Oncogene) • CRBN (Cereblon)
|
RET mutation • RET G810R • RET V804M • RET V804* • RET wild-type
Importantly, 20p exhibited highly impressive antitumor potency in both a Ba/F3-KIF5B-RETWT-derived xenograft mouse model and a selpercatinib-resistant Ba/F3-KIF5B-RETG810R-positive mutant xenograft mouse model. Overall, 20p represents a novel and promising drug lead for overcoming RET solvent-front mutation-based resistance to selpercatinib.
2 months ago
Journal
|
RET (Ret Proto-Oncogene) • KIF5B (Kinesin Family Member 5B)