The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas
Gliomas are the most common primary malignant intracranial brain tumors. Their proliferative and invasive behavior is controlled by various epigenetic mechanisms. 5-hydroxymethylcytosine (5-hmC) is one of the epigenetic DNA modifications that employs ten-eleven translocation (TET) enzymes to its oxi...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Oncology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fonc.2022.621460/full |
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| author | Aneta Brągiel-Pieczonka Gabriela Lipka Angelika Stapińska-Syniec Michał Czyżewski Katarzyna Żybura-Broda Michał Sobstyl Marcin Rylski Marcin Rylski Marta Grabiec |
| author_facet | Aneta Brągiel-Pieczonka Gabriela Lipka Angelika Stapińska-Syniec Michał Czyżewski Katarzyna Żybura-Broda Michał Sobstyl Marcin Rylski Marcin Rylski Marta Grabiec |
| author_sort | Aneta Brągiel-Pieczonka |
| collection | DOAJ |
| description | Gliomas are the most common primary malignant intracranial brain tumors. Their proliferative and invasive behavior is controlled by various epigenetic mechanisms. 5-hydroxymethylcytosine (5-hmC) is one of the epigenetic DNA modifications that employs ten-eleven translocation (TET) enzymes to its oxidation. Previous studies demonstrated altered expression of 5-hmC across gliomagenesis. However, its contribution to the initiation and progression of human gliomas still remains unknown. To characterize the expression profiles of 5-hmC and TET in human glioma samples we used the EpiJET 5-hmC and 5-mC Analysis Kit, quantitative real-time PCR, and Western blot analysis. A continuous decline of 5-hmC levels was observed in solid tissue across glioma grades. However, in glioblastoma (GBM), we documented uncommon heterogeneity in 5-hmC expression. Further analysis showed that the levels of TET proteins, but not their transcripts, may influence the 5-hmC abundance in GBM. Early tumor-related biomarkers may also be provided by the study of aberrant DNA hydroxymethylation in the blood of glioma patients. Therefore, we explored the patterns of TET transcripts in plasma samples and we found that their profiles were variously regulated, with significant value for TET2. The results of our study confirmed that DNA hydroxymethylation is an important mechanism involved in the pathogenesis of gliomas, with particular reference to glioblastoma. Heterogeneity of 5-hmC and TET proteins expression across GBM may provide novel insight into define subtype-specific patterns of hydroxymethylome, and thus help to interpret the heterogeneous outcomes of patients with the same disease. |
| first_indexed | 2024-04-13T17:04:21Z |
| format | Article |
| id | doaj.art-7df8e5650a8a4e05ac37574cc88f558c |
| institution | Directory Open Access Journal |
| issn | 2234-943X |
| language | English |
| last_indexed | 2024-04-13T17:04:21Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Oncology |
| spelling | doaj.art-7df8e5650a8a4e05ac37574cc88f558c2022-12-22T02:38:31ZengFrontiers Media S.A.Frontiers in Oncology2234-943X2022-04-011210.3389/fonc.2022.621460621460The Profiles of Tet-Mediated DNA Hydroxymethylation in Human GliomasAneta Brągiel-Pieczonka0Gabriela Lipka1Angelika Stapińska-Syniec2Michał Czyżewski3Katarzyna Żybura-Broda4Michał Sobstyl5Marcin Rylski6Marcin Rylski7Marta Grabiec8Department of Clinical Cytology, Centre of Postgraduate Medical Education, Warsaw, PolandDepartment of Clinical Cytology, Centre of Postgraduate Medical Education, Warsaw, PolandDepartment of Neurosurgery, Institute of Psychiatry and Neurology, Warsaw, PolandDepartment of Neurosurgery, Institute of Psychiatry and Neurology, Warsaw, PolandDepartment of Clinical Cytology, Centre of Postgraduate Medical Education, Warsaw, PolandDepartment of Neurosurgery, Institute of Psychiatry and Neurology, Warsaw, PolandDepartment of Clinical Cytology, Centre of Postgraduate Medical Education, Warsaw, PolandDepartment of Radiology, Institute of Psychiatry and Neurology, Warsaw, PolandDepartment of Clinical Cytology, Centre of Postgraduate Medical Education, Warsaw, PolandGliomas are the most common primary malignant intracranial brain tumors. Their proliferative and invasive behavior is controlled by various epigenetic mechanisms. 5-hydroxymethylcytosine (5-hmC) is one of the epigenetic DNA modifications that employs ten-eleven translocation (TET) enzymes to its oxidation. Previous studies demonstrated altered expression of 5-hmC across gliomagenesis. However, its contribution to the initiation and progression of human gliomas still remains unknown. To characterize the expression profiles of 5-hmC and TET in human glioma samples we used the EpiJET 5-hmC and 5-mC Analysis Kit, quantitative real-time PCR, and Western blot analysis. A continuous decline of 5-hmC levels was observed in solid tissue across glioma grades. However, in glioblastoma (GBM), we documented uncommon heterogeneity in 5-hmC expression. Further analysis showed that the levels of TET proteins, but not their transcripts, may influence the 5-hmC abundance in GBM. Early tumor-related biomarkers may also be provided by the study of aberrant DNA hydroxymethylation in the blood of glioma patients. Therefore, we explored the patterns of TET transcripts in plasma samples and we found that their profiles were variously regulated, with significant value for TET2. The results of our study confirmed that DNA hydroxymethylation is an important mechanism involved in the pathogenesis of gliomas, with particular reference to glioblastoma. Heterogeneity of 5-hmC and TET proteins expression across GBM may provide novel insight into define subtype-specific patterns of hydroxymethylome, and thus help to interpret the heterogeneous outcomes of patients with the same disease.https://www.frontiersin.org/articles/10.3389/fonc.2022.621460/fullepigenetics5-hydroxymethylcytosineten-eleven translocation enzymesbrain tumorsglioblastoma |
| spellingShingle | Aneta Brągiel-Pieczonka Gabriela Lipka Angelika Stapińska-Syniec Michał Czyżewski Katarzyna Żybura-Broda Michał Sobstyl Marcin Rylski Marcin Rylski Marta Grabiec The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas Frontiers in Oncology epigenetics 5-hydroxymethylcytosine ten-eleven translocation enzymes brain tumors glioblastoma |
| title | The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas |
| title_full | The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas |
| title_fullStr | The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas |
| title_full_unstemmed | The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas |
| title_short | The Profiles of Tet-Mediated DNA Hydroxymethylation in Human Gliomas |
| title_sort | profiles of tet mediated dna hydroxymethylation in human gliomas |
| topic | epigenetics 5-hydroxymethylcytosine ten-eleven translocation enzymes brain tumors glioblastoma |
| url | https://www.frontiersin.org/articles/10.3389/fonc.2022.621460/full |
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