ArticleJournal of cancer research and clinical oncology2017
MGMT promoter methylation status in Merkel cell carcinoma: in vitro versus invivo.
Article in Journal of cancer research and clinical oncology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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Who cites it
5 citing papers in PubMed, 5 citations in OpenAlex.
- Merkel cell carcinoma: updates in tumor biology, emerging therapies, and preclinical models.Frontiers in oncology · 2024Review
- Viral Status Predicts the Patterns of Genome Methylation and Decitabine Response in Merkel Cell Carcinoma.The Journal of investigative dermatology · 2022Article
- Epigenetic Dysregulations in Merkel Cell Polyomavirus-Driven Merkel Cell Carcinoma.International journal of molecular sciences · 2021Review
- Role of Virus-Induced Host Cell Epigenetic Changes in Cancer.International journal of molecular sciences · 2021Review
- Decreased IgG Antibody Response to Viral Protein Mimotopes of Oncogenic Merkel Cell Polyomavirus in Sera From Healthy Elderly Subjects.Frontiers in immunology · 2021Article
Corrections and comments
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Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeExpression of O6-methylguanine-DNA methyltransferase (MGMT) in Merkel cell carcinoma (MCC) is very variable; thus, we tested whether this may be due to differential methylation of the MGMT gene promoter.
methodsQuantitative analysis of MGMT mRNA and protein expression, as well as MGMT promoter methylation status, was performed in a series of tissue samples of MCC tumors, representing both primary and metastatic lesions, as well as in six MCC cell lines.
resultsThese analyses revealed a very heterogeneous MGMT mRNA and protein expression in MCC both in vivo and in vitro. However, neither the MGMT mRNA nor protein expression correlated with the sensitivity of MCC cell lines toward the alkylating agent dacarbazine in vitro. Notably, increased methylation at the promoter of the MGMT gene was observed in 2/6 (33%) of the MCC cell lines; however, MGMT promoter methylation was absent in all MCC tissue samples. According to our results, albeit aberrant methylation of MGMT gene promoter can be observed in in vitro propagated MCC cell lines, it seems to be absent or very rare in MCC lesions in situ.
conclusionThus, the evaluation of this marker has no or only little significance for predicting response to therapy or for improving efficacy of demethylating agents in the treatment of MCC. Microenvironmental factors may play a role in explaining the different results between MCC cell lines and MCC samples.
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