Association of TET1 expression with colorectal cancer progression
Abstract
OBJECTIVE: The ten-eleven translocation (TET) proteins, as methylcytosine dioxygenases, catalyze 5-methylcytosine (5mC) into 5-hydroxymethylcytosine (5hmC). The altered expression of TET1 disrupts the balance between DNA methylation and demethylation. This alteration has been reported to be associated with carcinogenesis in various malignancies. The aim of the present study was to investigate changes in expression and the role of TET1 in colorectal cancer (CRC). MATERIAL AND METHODS: A total of 109 CRC patients who underwent radical surgical colon resection were enrolled. The QuantiGene Plex Assay was used to detect the expression of TET1 in CRC tissues and matching adjacent normal tissues. We analyzed the associations between TET1 expression levels and various clinicopathologic features of CRC. TET1 overexpression and depletion cells were constructed to investigate its biological role in CRC. RESULTS: Compared to normal tissues, the expression level of TET1 in CRC was significantly lower. The ratio of TET1 in CRC tissues to that in adjacent normal tissues (C/N-TET1) was an independent overall survival predictive factor. Moreover, in vitro studies showed that TET1 could inhibit cell growth and promote cell metastasis and invasion. CONCLUSIONS: These findings indicated that TET1 played a multifaceted role in the pathogenesis of CRC, and thereby resulting in multiple effects on tumor progression.
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Many colorectal cancers have low TET expression and relatively high HIF1α expression.
“In fact, reports show that many CRCs have low expression levels of TETs and relatively high expression levels of HIF1α, implying that pharmacological ascorbate may attack multiple nodes in tumours with minimum toxicity102,103, making it an ideal magic bullet’ for cancer therapy.”
From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [103]
Ascorbate treatment might hit several targets in tumours while causing little toxicity.
“In fact, reports show that many CRCs have low expression levels of TETs and relatively high expression levels of HIF1α, implying that pharmacological ascorbate may attack multiple nodes in tumours with minimum toxicity102,103, making it an ideal magic bullet’ for cancer therapy.”
From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [103]
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- Authors
- Tian, Y., Pan, F., Sun, X., Gan, M., Lin, A., Zhang, D., Zhu, Y., & Lai, M.
- Affiliations
- Zhejiang Cancer Hospital (CN)
- Zhejiang University (CN)
- Zhejiang Taizhou Hospital (CN)
- Wenzhou Medical University (CN)
- Corresponding author
- Zhu, Yimin
- Lai, Maode
- Venue
- Scandinavian Journal of Gastroenterology
- Publisher
- Informa UK Limited
- Published
- 2016-11-16
- Volume
- 52
- Issue
- 3
- Pages
- 312-320
- ISSN
- 0036-5521 (ISSN-L)
- 1502-7708
- OpenAlex
- W2550788914
- Cited by
- 34
- References
- 35
- Citations by year
- 2025: 3 · 2024: 2 · 2023: 2 · 2022: 5 · 2021: 3 · 2020: 6 · 2019: 8 · 2018: 2 · 2017: 3
- FWCI
- 2.25
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Scandinavian Journal of Gastroenterology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Key Science & Technology special project of Zhejiang Province (2012C13014-3)
- 111 Project (B13026)
- National Natural Science Foundation of China (81090420/81090421)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
- Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
- Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
- Keywords
- TET1, colorectal cancer, DNA demethylation, 5-hydroxymethylcytosine, 5-methylcytosine, tumor progression, overall survival, prognostic factors, cell invasion, metastasis, cell growth inhibition
- MeSH terms
- Adult, Aged, Aged, 80 and over, Cell Movement, China, Humans, Mixed Function Oxygenases, Male, Middle Aged, Proto-Oncogene Proteins, Colorectal Neoplasms, Gene Expression Regulation, Neoplastic, Proportional Hazards Models, Disease Progression, DNA Methylation, Cell Proliferation, Kaplan-Meier Estimate
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