Methylation of tumour suppressor gene promoters in the presence and absence of transcriptional silencing in high hyperdiploid acute lymphoblastic leukaemia

Kajsa Paulsson, Qian An, Anthony Moorman, Helen Parker, Gael Molloy, Teresa Davies, Mike Griffiths, Fiona M. Ross, Julie Irving, Christine J. Harrison, Bryan D. Young, Jon C. Strefford

Research output: Contribution to journalArticle

Abstract

Promoter methylation is a common phenomenon in tumours, including haematological malignancies. In the present study, we investigated 36 cases of high hyperdiploid (>50 chromosomes) acute lymphoblastic leukaemia (ALL) with methylation-specific multiplex ligase-dependent probe amplification to determine the extent of aberrant methylation in this subgroup. The analysis, which comprised the promoters of 35 known tumour suppressor genes, showed that 16 genes displayed abnormal methylation in at least one case each. The highest number of methylated gene promoters seen in a single case was thirteen, with all but one case displaying methylation for at least one gene. The most common targets were ESR1 (29/36 cases; 81%), CADM1 (IGSF4, TSLC1; 25/36 cases; 69%), FHIT (24/36 cases; 67%) and RARB (22/36 cases; 61%). Interestingly, quantitative reverse transcription-polymerase chain reaction showed that although methylation of the CADM1 and RARB promoters resulted in the expected pattern of downregulation of the respective genes, no difference could be detected in FHIT expression between methylation-positive and -negative cases. Furthermore, TIMP3 was not expressed regardless of methylation status, showing that aberrant methylation does not always lead to gene expression changes. Taken together, our findings suggest that aberrant methylation of tumour suppressor gene promoters is a common phenomenon in high hyperdiploid ALL.

Original languageEnglish (US)
Pages (from-to)838-847
Number of pages10
JournalBritish Journal of Haematology
Volume144
Issue number6
DOIs
StatePublished - Mar 1 2009
Externally publishedYes

Fingerprint

Polyploidy
Tumor Suppressor Genes
Precursor Cell Lymphoblastic Leukemia-Lymphoma
Methylation
Genes
Hematologic Neoplasms
Ligases
Reverse Transcription
Down-Regulation
Chromosomes
Gene Expression
Polymerase Chain Reaction

Keywords

  • Acute lymphoblastic leukaemia
  • High hyperdiploid
  • Methylation

ASJC Scopus subject areas

  • Hematology

Cite this

Methylation of tumour suppressor gene promoters in the presence and absence of transcriptional silencing in high hyperdiploid acute lymphoblastic leukaemia. / Paulsson, Kajsa; An, Qian; Moorman, Anthony; Parker, Helen; Molloy, Gael; Davies, Teresa; Griffiths, Mike; Ross, Fiona M.; Irving, Julie; Harrison, Christine J.; Young, Bryan D.; Strefford, Jon C.

In: British Journal of Haematology, Vol. 144, No. 6, 01.03.2009, p. 838-847.

Research output: Contribution to journalArticle

Paulsson, K, An, Q, Moorman, A, Parker, H, Molloy, G, Davies, T, Griffiths, M, Ross, FM, Irving, J, Harrison, CJ, Young, BD & Strefford, JC 2009, 'Methylation of tumour suppressor gene promoters in the presence and absence of transcriptional silencing in high hyperdiploid acute lymphoblastic leukaemia', British Journal of Haematology, vol. 144, no. 6, pp. 838-847. https://doi.org/10.1111/j.1365-2141.2008.07523.x
Paulsson, Kajsa ; An, Qian ; Moorman, Anthony ; Parker, Helen ; Molloy, Gael ; Davies, Teresa ; Griffiths, Mike ; Ross, Fiona M. ; Irving, Julie ; Harrison, Christine J. ; Young, Bryan D. ; Strefford, Jon C. / Methylation of tumour suppressor gene promoters in the presence and absence of transcriptional silencing in high hyperdiploid acute lymphoblastic leukaemia. In: British Journal of Haematology. 2009 ; Vol. 144, No. 6. pp. 838-847.
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