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Matches in SemOpenAlex for { <https://semopenalex.org/work/W1732253485> ?p ?o ?g. }

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• W1732253485 startingPage "2229" @default.
• W1732253485 abstract "The retinoblastoma gene (Rb) is one of the best characterized tumor suppressor genes, and its inactivation is associated with a number of cancers. Previous studies have shown, by restriction enzyme analysis, that the promoter region of the Rb gene is methylated in a significant proportion of primary retinoblastoma tumors. We now report the first detailed methylation sequence analysis of the CpG island spanning the retinoblastoma promoter from hypermethylated retinoblastoma tumors. Our results show methylation is not confined to a specific CpG site, as detected by restriction enzyme studies, but extends to essentially all 27 CpG dinucleotides spanning the retinoblastoma CpG island, including the core promoter. The methylation pattern from each tumor DNA sample is different, ranging from densely to sparsely methylated profiles. Single CpG sites, in particular the E2F transcription factor binding site, as well as blocks of CpGs, were undermethylated in some tumor samples. Possible interference of methylation could be due to the binding of sequence-specific protein factors at these sites in the tumor cells. This study highlights that the dynamics of DNA methylation in cancer cells are clearly different from normal cells and gives an insight into the mechanism of abnormal methylation of CpG islands in cancer cells." @default.
• W1732253485 created "2016-06-24" @default.
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• W1732253485 date "1997-06-01" @default.
• W1732253485 modified "2023-10-06" @default.
• W1732253485 title "Extensive DNA methylation spanning the Rb promoter in retinoblastoma tumors." @default.
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• W1732253485 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9187126" @default.
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