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https://doi.org/10.3892/or.2021.8037
Title: | PRIMA-1<sup>met</sup> induces autophagy in colorectal cancer cells through upregulation of the mTOR/AMPK-ULK1-Vps34 signaling cascade | Authors: | Li, XL Zhou, J Xia, CJ Min, H Lu, ZK Chen, ZR |
Keywords: | p53 p53‑reactivation and induction of massive apoptosis‑1methylated autophagy oncotherapy colorectal cancer |
Issue Date: | 1-May-2021 | Publisher: | Spandidos Publications | Citation: | Li, XL, Zhou, J, Xia, CJ, Min, H, Lu, ZK, Chen, ZR (2021-05-01). PRIMA-1met induces autophagy in colorectal cancer cells through upregulation of the mTOR/AMPK-ULK1-Vps34 signaling cascade. Oncology Reports 45 (5). ScholarBank@NUS Repository. https://doi.org/10.3892/or.2021.8037 | Abstract: | p53-reactivation and induction of massive apop- tosis-1, APR-017 methylated (PRIMA-1met; APR246) targets mutant p53 to restore its wild-type structure and function. It was previously demonstrated that PRIMA-1met effectively inhibited the growth of colorectal cancer (CRC) cells in a p53-independent manner, and distinctly induced apoptosis by upregulating Noxa in p53-mutant cell lines. The present study including experiments of western blotting, acridine orange staining and transmission electron microscopy revealed that PRIMA-1met induced autophagy in CRC cells independently of p53 status. Importantly, PRIMA-1met not only promoted autophagic vesicle (AV) formation and AV-lysosome fusion, but also increased lysosomal degradation. Furthermore, Cell Counting Kit-8 assay, colony formation assay and small interfering RNA transfection were performed to investigate the underling mechanisms. The study indicated that activa- tion of the mTOR/AMPK-ULK1-Vps34 autophagic signaling cascade was key for PRIMA-1met-induced autophagy. Additionally, autophagy served a crucial role in the inhibi- tory effect of PRIMA-1met in cells harboring wild-type p53, which was closely associated with the increased expression of Noxa. Taken together, the results determined the effect of PRIMA-1met on autophagy, and further revealed mechanistic insights into different CRC cell lines. It was concluded that PRIMA-1met-based therapy may be an effective strategy for CRC treatment. | Source Title: | Oncology Reports | URI: | https://scholarbank.nus.edu.sg/handle/10635/203815 | ISSN: | 1021335X 17912431 |
DOI: | 10.3892/or.2021.8037 |
Appears in Collections: | Staff Publications Elements |
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PRIMA‑1supmetsup induces autophagy in colorectal cancer cells through upregulation of the mTORAMPK‑ULK1‑Vps34 signaling casc.pdf | Published version | 1.65 MB | Adobe PDF | CLOSED | None |
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