Download MendeleyKinase-impaired BTK mutations are susceptible to clinical-stage BTK and IKZF1/3 degrader NX-2127.
Montoya, S., Bourcier, J., Noviski, M., Lu, H., Thompson, M.C., Chirino, A., Jahn, J., Sondhi, A.K., Gajewski, S., Tan, Y.S.M., Yung, S., Urban, A., Wang, E., Han, C., Mi, X., Kim, W.J., Sievers, Q., Auger, P., Bousquet, H., Brathaban, N., Bravo, B., Gessner, M., Guiducci, C., Iuliano, J.N., Kane, T., Mukerji, R., Reddy, P.J., Powers, J., Sanchez Garcia de Los Rios, M., Ye, J., Barrientos Risso, C., Tsai, D., Pardo, G., Notti, R.Q., Pardo, A., Affer, M., Nawaratne, V., Totiger, T.M., Pena-Velasquez, C., Rhodes, J.M., Zelenetz, A.D., Alencar, A., Roeker, L.E., Mehta, S., Garippa, R., Linley, A., Soni, R.K., Skanland, S.S., Brown, R.J., Mato, A.R., Hansen, G.M., Abdel-Wahab, O., Taylor, J.(2024) Science 383: eadi5798-eadi5798
- PubMed: 38301010
- DOI: https://doi.org/10.1126/science.adi5798
- Primary Citation of Related Structures:
8GC7, 8GC8 - PubMed Abstract:
Increasing use of covalent and noncovalent inhibitors of Bruton's tyrosine kinase (BTK) has elucidated a series of acquired drug-resistant BTK mutations in patients with B cell malignancies. Here we identify inhibitor resistance mutations in BTK with distinct enzymatic activities, including some that impair BTK enzymatic activity while imparting novel protein-protein interactions that sustain B cell receptor (BCR) signaling. Furthermore, we describe a clinical-stage BTK and IKZF1/3 degrader, NX-2127, that can bind and proteasomally degrade each mutant BTK proteoform, resulting in potent blockade of BCR signaling. Treatment of chronic lymphocytic leukemia with NX-2127 achieves >80% degradation of BTK in patients and demonstrates proof-of-concept therapeutic benefit. These data reveal an oncogenic scaffold function of mutant BTK that confers resistance across clinically approved BTK inhibitors but is overcome by BTK degradation in patients.
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA.
Organizational Affiliation:
