Kimiko Sogabe, Shingen Nakamura, Yoshiki Higa, Hirokazu Miki, Asuka Oda, Tomoko Maruhashi, Ryohei Sumitani, Masahiro Oura, Mamiko Takahashi, Masafumi Nakamura, Yusaku Maeda, Tomoyo Hara, Hiroki Yamagami, Shiro Fujii, Kumiko Kagawa, Shuji Ozaki, Kiyoe Kurahashi, Itsuro Endo, Ken-Ichi Aihara, Emiko Nakaue, Masahiro Hiasa, Jumpei Teramachi, Takeshi Harada, Masahiro Abe
Resistance to proteasome inhibitors (PIs) has emerged as an important clinical issue. We investigated the mechanisms underlying multiple myeloma (MM) cell resistance to PIs. To mimic their pharmacokinetic/pharmacodynamic (PK/PD) profiles, MM cells were treated with bortezomib and carfilzomib for 1 h at concentrations up to 400 and 1,000 nM, respectively. Susceptibility to these PIs markedly varied among MM cell lines. Pulsatile treatments with PIs suppressed translation, as demonstrated by incorporation of puromycin at 24 h in PI-susceptible MM...
January 21, 2024: International Journal of Hematology