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Activating KRAS, NRAS, and BRAF mutants enhance proteasome capacity and reduce endoplasmic reticulum stress in multiple myeloma.
Shirazi F, Jones RJ, Singh RK, Zou J, Kuiatse I, Berkova Z, Wang H, Lee HC, Hong S, Dick L, Chattopadhyay N, Orlowski RZ. Shirazi F, et al. Proc Natl Acad Sci U S A. 2020 Aug 18;117(33):20004-20014. doi: 10.1073/pnas.2005052117. Epub 2020 Aug 3. Proc Natl Acad Sci U S A. 2020. PMID: 32747568 Free PMC article.
Proteasome chymotrypsin-like, trypsin-like, and caspase-like activities were increased, and this enhanced capacity reduced PI sensitivity, while DN-KRAS and DN-NRAS did the opposite. Pharmacologic RAF or MAPK kinase (MEK) inhibitors decreased proteasome activity, and sensi …
Proteasome chymotrypsin-like, trypsin-like, and caspase-like activities were increased, and this enhanced capacity reduced PI sensitivity, w …