TGF-beta 1 protects colon tumor cells from apoptosis through XAF1 suppression
DC Field | Value | Language |
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dc.contributor.author | Moon, Jung Rock | - |
dc.contributor.author | Oh, Shin Ju | - |
dc.contributor.author | Lee, Chang Kyun | - |
dc.contributor.author | Chi, Sung Gil | - |
dc.contributor.author | Kim, Hyo Jong | - |
dc.date.accessioned | 2021-09-01T14:40:25Z | - |
dc.date.available | 2021-09-01T14:40:25Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2019-06 | - |
dc.identifier.issn | 1019-6439 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/65300 | - |
dc.description.abstract | Transforming growth factor-beta 1 (TGF-beta 1) is a multifunctional cytokine that functions as a growth suppressor in normal epithelial cells and early stage tumors, but acts as a tumor promoter during malignant progression. However, the molecular basis underlying the conversion of TGF-beta 1 function remains largely undefined. X-linked inhibitor of apoptosis-associated factor 1 (XAF1) is a pro-apoptotic tumor suppressor that frequently displays epigenetic inactivation in various types of human malignancies, including colorectal cancer. The present study explored whether the anti-apoptotic effect of TGF-beta 1 is linked to its regulatory effect on XAF1 induction in human colon cancer cells under stressful conditions. The results revealed that TGF-beta 1 treatment protected tumor cells from various apoptotic stresses, including 5-fluorouracil, etoposide and gamma-irradiation. XAF1 expression was activated at the transcriptional level by these apoptotic stresses and TGF-beta 1 blocked the stress-mediated activation of the XAF1 promoter. The study also demonstrated that mitogen-activated protein kinase kinase inhibition or extracellular signal-activated kinase (Erk)1/2 depletion induced XAF1 induction, while the activation of K-Ras (G12C) led to its reduction. In addition, TGF-beta 1 blocked the stress-mediated XAF1 promoter activation and induction of apoptosis. This effect was abrogated if Erk1/2 was depleted, indicating that TGF-beta 1 represses XAF1 transcription through Erk activation, thereby protecting tumor cells from apoptotic stresses. These findings point to a novel molecular mechanism underlying the tumor-promoting function of TGF-beta 1, which may be utilized in the development of a novel therapeutic strategy for the treatment of colorectal cancer. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | SPANDIDOS PUBL LTD | - |
dc.subject | TGF-BETA RECEPTOR | - |
dc.subject | TRANSFORMING GROWTH-FACTOR-BETA-1 | - |
dc.subject | COLORECTAL-CANCER | - |
dc.subject | SIGNALING PATHWAYS | - |
dc.subject | GROWTH | - |
dc.subject | ACTIVATION | - |
dc.subject | XIAP | - |
dc.subject | RAS | - |
dc.subject | P53 | - |
dc.subject | HYPERMETHYLATION | - |
dc.title | TGF-beta 1 protects colon tumor cells from apoptosis through XAF1 suppression | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Chi, Sung Gil | - |
dc.identifier.doi | 10.3892/ijo.2019.4776 | - |
dc.identifier.scopusid | 2-s2.0-85064869883 | - |
dc.identifier.wosid | 000477432000018 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF ONCOLOGY, v.54, no.6, pp.2117 - 2126 | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF ONCOLOGY | - |
dc.citation.title | INTERNATIONAL JOURNAL OF ONCOLOGY | - |
dc.citation.volume | 54 | - |
dc.citation.number | 6 | - |
dc.citation.startPage | 2117 | - |
dc.citation.endPage | 2126 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Oncology | - |
dc.relation.journalWebOfScienceCategory | Oncology | - |
dc.subject.keywordPlus | TGF-BETA RECEPTOR | - |
dc.subject.keywordPlus | TRANSFORMING GROWTH-FACTOR-BETA-1 | - |
dc.subject.keywordPlus | COLORECTAL-CANCER | - |
dc.subject.keywordPlus | SIGNALING PATHWAYS | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | ACTIVATION | - |
dc.subject.keywordPlus | XIAP | - |
dc.subject.keywordPlus | RAS | - |
dc.subject.keywordPlus | P53 | - |
dc.subject.keywordPlus | HYPERMETHYLATION | - |
dc.subject.keywordAuthor | colon tumor | - |
dc.subject.keywordAuthor | cell apoptosis | - |
dc.subject.keywordAuthor | transforming growth factor-beta 1 | - |
dc.subject.keywordAuthor | XIAP-associated factor 1 | - |
dc.subject.keywordAuthor | Ras | - |
dc.subject.keywordAuthor | extracellular signal-regulated kinase signaling pathway | - |
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