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Mutant p53 driven-LINC00857, a protein scaffold between FOXM1 and deubiquitinase OTUB1, promotes the metastasis of pancreatic cancer.
- Source :
-
Cancer letters [Cancer Lett] 2023 Jan 01; Vol. 552, pp. 215976. Date of Electronic Publication: 2022 Oct 20. - Publication Year :
- 2023
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Abstract
- Tumour metastasis is the major adverse factor for recurrence and death in pancreatic cancer (PC) patients. P53 mutations are considered to be the second most common type of mutation in PC and significantly promote PC metastasis. However, the molecular mechanisms underlying the effects of p53 mutations, especially the regulatory relationship of the protein with long noncoding RNAs (lncRNAs), remain unclear. In the present study, we demonstrated that the lncRNA LINC00857 exhibits a significantly elevated level in PC and that it is associated with poor prognosis; furthermore, TCGA data showed that LINC00857 expression was significantly upregulated in the mutant p53 group compared with the wild-type p53 group. Gain- and loss-of-function experiments showed that LINC00857 promotes the metastasis of PC cells. We further found that LINC00857 upregulates FOXM1 protein expression and thus accelerates metastasis in vitro and in vivo. Mechanistically, LINC00857 bound simultaneously to FOXM1 and to the deubiquitinase OTUB1, thereby serving as a protein scaffold and enhancing the interaction between FOXM1 and OTUB1, which inhibits FOXM1 degradation through the ubiquitin-proteasome pathway. Interestingly, we found that mutant p53 promotes LINC00857 transcription by binding to its promoter region. Finally, atorvastatin, a commonly prescribe lipid-lowering drug, appeared to inhibit PC metastasis by inhibiting the mutant p53-LINC00857 axis. Taken together, our results provide new insights into the biology driving PC metastasis and indicate that the mutant p53-LINC00857 axis might represent a novel therapeutic target for PC metastasis.<br />Competing Interests: Declaration of competing interest The authors declare no potential conflicts of interest.<br /> (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Subjects :
- Humans
Cell Line, Tumor
Cell Proliferation
Gene Expression Regulation, Neoplastic
Tumor Suppressor Protein p53 genetics
Tumor Suppressor Protein p53 metabolism
Pancreatic Neoplasms
Deubiquitinating Enzymes genetics
Deubiquitinating Enzymes metabolism
Forkhead Box Protein M1 genetics
Forkhead Box Protein M1 metabolism
Pancreatic Neoplasms pathology
RNA, Long Noncoding genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1872-7980
- Volume :
- 552
- Database :
- MEDLINE
- Journal :
- Cancer letters
- Publication Type :
- Academic Journal
- Accession number :
- 36272615
- Full Text :
- https://doi.org/10.1016/j.canlet.2022.215976