1. Targeting the molecular chaperone CCT2 inhibits GBM progression by influencing KRAS stability.
- Author
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Zhao F, Yao Z, Li Y, Zhao W, Sun Y, Yang X, Zhao Z, Huang B, Wang J, Li X, and Chen A
- Subjects
- Humans, Animals, Cell Line, Tumor, Artemisinins pharmacology, Disease Progression, Xenograft Model Antitumor Assays, Brain Neoplasms drug therapy, Brain Neoplasms pathology, Brain Neoplasms metabolism, Brain Neoplasms genetics, Mice, Nude, Signal Transduction drug effects, Mice, Gene Expression Regulation, Neoplastic drug effects, Cell Proliferation drug effects, Glioblastoma drug therapy, Glioblastoma pathology, Glioblastoma metabolism, Glioblastoma genetics, Proto-Oncogene Proteins p21(ras) genetics, Proto-Oncogene Proteins p21(ras) metabolism, Chaperonin Containing TCP-1 metabolism, Chaperonin Containing TCP-1 genetics, Protein Stability drug effects
- Abstract
Proper protein folding relies on the assistance of molecular chaperones post-translation. Dysfunctions in chaperones can cause diseases associated with protein misfolding, including cancer. While previous studies have identified CCT2 as a chaperone subunit and an autophagy receptor, its specific involvement in glioblastoma remains unknown. Here, we identified CCT2 promote glioblastoma progression. Using approaches of coimmunoprecipitation, mass spectrometry and surface plasmon resonance, we found CCT2 directly bound to KRAS leading to increased stability and upregulated downstream signaling of KRAS. Interestingly, we found that dihydroartemisinin, a derivative of artemisinin, exhibited therapeutic effects in a glioblastoma animal model. We further demonstrated direct binding between dihydroartemisinin and CCT2. Treatment with dihydroartemisinin resulted in decreased KRAS expression and downstream signaling. Highlighting the significance of CCT2, CCT2 overexpression rescued the inhibitory effect of dihydroartemisinin on glioblastoma. In conclusion, the study demonstrates that CCT2 promotes glioblastoma progression by directly binding to and enhancing the stability of the KRAS protein. Additionally, dihydroartemisinin inhibits glioblastoma by targeting the CCT2 and the following KRAS signaling. Our findings overcome the challenge posed by the undruggable nature of KRAS and offer potential therapeutic strategies for glioblastoma treatment., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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