Article
作者: Wang, Keshi ; Wang, Bin ; Young, Lucy C ; Xu, Rui ; Riegler, Erin ; Zhang, Cathy ; Dyba, Marcin ; Parker, Katie ; Donovan, Sofia ; Wehn, Paul M. ; Sinkevicius, Kerstin W. ; Ju, Jin Hyun ; Malik, Wafa ; Fu, Lijuan ; Lightstone, Felice C. ; Maciag, Anna E. ; Wallace, Eli M. ; McCormick, Frank ; Hata, Aaron N. ; Chen, Ming ; Feng, Cindy ; Abreu-Blanco, Maria ; Yang, Yue ; Jeknic, Stevan ; Yan, Wupeng ; Denson, John-Paul ; Feng, Siyu ; Nissley, Dwight V. ; Esposito, Dominic ; Rabara, Dana ; Smith, Brian P. ; Larsen, Erik K. ; Simanshu, Dhirendra K. ; Champagne, Allison ; Ghorbanpoorvalukolaie, Samar ; Stephen, Andrew G. ; Lin, Ken ; Stice, James P. ; Czyzyk, Daniel J. ; Beltran, Pedro J. ; Turner, David M.
BBO-10203 is an orally available drug that covalently and specifically binds to the RAS-binding domain of phosphoinositide 3-kinase α (PI3Kα), preventing its activation by HRAS, NRAS, and KRAS. It inhibited PI3Kα activation in tumors with oncogenic mutations in
KRAS
or
PIK3CA
, and in tumors with human epidermal growth factor receptor 2 (HER2) amplification or overexpression. In preclinical models, BBO-10203 caused significant tumor growth inhibition across multiple tumor types and showed enhanced efficacy in combination with inhibitors of cyclin-dependent kinase 4/6 (CDK4/6), estrogen receptor (ER), HER2 and KRAS-G12C mutant, including in tumors harboring mutations in Kelch-like ECH-associated protein 1 (KEAP1) and Serine/Threonine Kinase 11 (STK11). Notably, these antitumor effects occurred without inducing hyperglycemia, as insulin signaling does not depend on RAS-mediated PI3Kα activation to promote glucose uptake.