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- W2007200210 abstract "<h2>Abstract</h2> A hallmark of cancer is the paradoxical co-presence, in the same tumour, of local and global DNA hypomethylation together with the regional hypermethylation of certain genes. Due to the oncogenic role of these different DNA methylation alterations, two therapeutic strategies are possible: the use of DNA methylating agents (DMA, such as folate) to inhibit global or local DNA hypomethylation or the use of DNA hypomethylating agents (DHA, such as 5-aza-2-deoxycytidine) to abrogate the accumulation of hypermethylated genes. Here we explored the use of folate to treat gliomas in a mouse model, using tumours induced by either PDGF-B or Ras/Akt overexpression, or by ethylnitrosourea (ENU) treatment. Under all conditions the volume of tumours were significantly less in folate treated mice than in untreated mice. Quantitative methylated DNA immunoprecipitation (qMeDIP) and quantitative methylated specific PCR (qMSP) analysis of methylation status showed that folate treatment, increased the methylation level of DNA repeat elements in tumour and in colorectal tissue and that of <i>MGMT</i> and specific oncogenes (<i>PDGF-B</i> or <i>survivin</i>) in tumours (but not in colorectal tissue), but had no effect on the expression of tumour suppressor genes (<i>p53</i>, <i>PTEN</i> <i>or</i> <i>bax</i>) in tumours or in colorectal tissue. This suggests that folate has anti-neoplastic effects in gliomas and that no preneoplastic or neoplastic alterations were observed in unaffected colorectal tissue in response to the potential tumourigenic effects of folate. Collectively, our data support the proposal to include folate as a promising adjuvant in the design of anti-glioma therapeutic protocols in clinical studies." @default.
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- W2007200210 date "2012-10-01" @default.
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- W2007200210 title "Folate supplementation limits the tumourigenesis in rodent models of gliomagenesis" @default.
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- W2007200210 doi "https://doi.org/10.1016/j.ejca.2012.01.002" @default.
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