Methylation of Wnt antagonist genes: a useful prognostic marker for myelodysplastic syndrome View Full Text


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Article Info

DATE

2012-10-24

AUTHORS

Hong Wang, Rong Fan, Xiao-Qin Wang, De-Pei Wu, Guo-Wei Lin, Yang Xu, Wei-Yang Li

ABSTRACT

Activation of the Wnt signaling pathway has been implicated in the pathogenesis of many tumors as well as in leukemia. However, its role in myelodysplastic syndrome (MDS) is unknown. In this study, we employed methylation-specific PCR to examine the methylation status of six Wnt antagonist genes in 144 MDS patients and in the MDS cell line SKM-1. We also used real-time PCR to examine the expression of Wnt antagonist genes and Wnt pathway genes in the SKM-1 cell line after treatment with 5-aza-2′-deoxycytidine. We found that methylation of the gene promoters of each of the six genes were observed in MDS patients at the following methylation frequencies: 41 % for sFRP1, 89.6 % for sFRP2, 43.1 % for sFRP4, 50.7 % for sFRP5, 44.4 % for DKK-1, and 69.4 % for DKK-3. In the SKM-1 cell line, the gene promoters sFRP1, sFRP2, sFRP5, DKK-1, and DKK-3 were methylated, while sFRP4 was not methylated. Treatment of the SKM-1 cell line with 5-aza-2′-deoxycytidine induced re-expression of methylated Wnt antagonists and inactivation of the Wnt pathway. Survival analysis showed that methylation status of sFRP1, sFRP4, and sFRP5 was associated with worse survival in MDS and sFRP5 methylation also predicted a high risk of leukemia evolution (P = 0.018). Our results indicate that epigenetic regulation of the Wnt pathway in MDS cell line, and the methylation status of Wnt antagonists predicts prognoses of MDS patients. More... »

PAGES

199-209

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00277-012-1595-y

DOI

http://dx.doi.org/10.1007/s00277-012-1595-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1042713302

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/23093371


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49 schema:description Activation of the Wnt signaling pathway has been implicated in the pathogenesis of many tumors as well as in leukemia. However, its role in myelodysplastic syndrome (MDS) is unknown. In this study, we employed methylation-specific PCR to examine the methylation status of six Wnt antagonist genes in 144 MDS patients and in the MDS cell line SKM-1. We also used real-time PCR to examine the expression of Wnt antagonist genes and Wnt pathway genes in the SKM-1 cell line after treatment with 5-aza-2′-deoxycytidine. We found that methylation of the gene promoters of each of the six genes were observed in MDS patients at the following methylation frequencies: 41 % for sFRP1, 89.6 % for sFRP2, 43.1 % for sFRP4, 50.7 % for sFRP5, 44.4 % for DKK-1, and 69.4 % for DKK-3. In the SKM-1 cell line, the gene promoters sFRP1, sFRP2, sFRP5, DKK-1, and DKK-3 were methylated, while sFRP4 was not methylated. Treatment of the SKM-1 cell line with 5-aza-2′-deoxycytidine induced re-expression of methylated Wnt antagonists and inactivation of the Wnt pathway. Survival analysis showed that methylation status of sFRP1, sFRP4, and sFRP5 was associated with worse survival in MDS and sFRP5 methylation also predicted a high risk of leukemia evolution (P = 0.018). Our results indicate that epigenetic regulation of the Wnt pathway in MDS cell line, and the methylation status of Wnt antagonists predicts prognoses of MDS patients.
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65 SKM-1
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67 Wnt
68 Wnt antagonist genes
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71 Wnt pathway genes
72 activation
73 analysis
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76 cell lines
77 epigenetic regulation
78 evolution
79 expression
80 frequency
81 gene promoter
82 genes
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85 leukemia
86 leukemia evolution
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91 methylation status
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