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Cancers | Free Full-Text | Suppression of Cancer Cell Stemness and Drug Resistance via MYC Destabilization by Deubiquitinase USP45 Inhibition with a Natural Small Molecule

Cancer stem cells (CSCs) play significant roles in cancer development, drug resistance and cancer recurrence. In cancer treatments based on the CSC characteristics and inducing factors, MYC is a promising target for therapeutic molecules. Although it has been regarded as an undrugable target, its stability tightly regulated by the ubiquitin–proteasome system offers a new direction for molecule targeting and cancer treatment. Herein we report our discoveries in this research area, and we have found that deubiquitinase USP45 can directly bind with MYC, resulting in its deubiquitination and stabilization. Further, USP45 overexpressing can upregulate MYC, and this overexpressing can significantly enhance cancer development, cancer cell stemness and drug resistance. Interestingly, without enhancing cancer development, MYC silencing with shRNA can only suppress USP45-induced stemness and drug resistance. Moreover, we have identified that USP45 can be specifically bound and inhibite ....

United States , Hela Tchu , Siha Tchu , Franklin Lakes , China Cell Bank , Image Lab , Committee Sichuan University , Sichuan University , College Of Life Science , China Cell , Shanghai Haijihaoge , Life Science , Hallmark Gene Enrichment , Fluorescence Activated Cell Sorting , Autodock Tools , Animal Welfare Act , Animal Care , Use Committee , Doxorubicin Inhibits , Pad Prism ,