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Sökning: WFRF:(Ekman S) > (2010-2014) > Övrigt vetenskapligt/konstnärligt

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  • Sooman, Linda, et al. (författare)
  • SHP1 expression is epigenetically regulated and influences the sensitivity to chemotherapeutic agents in glioblastoma cells
  • 2012
  • Ingår i: Neuro-Oncology. - : Oxford University Press (OUP). - 1522-8517 .- 1523-5866. ; 14:suppl 3, s. iii18-iii18
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • INTRODUCTION: Glioblastoma is characterized by chemoresistance. One factor than can contribute to chemoresistance is aberrant DNA methylation of specific genes relevant for drug response, e.g. tumor suppressor genes. AIM: The aim of this study was to investigate whether the tumor suppressor gene SHP1 is epigenetically regulated and if its overexpression affects the sensitivity to chemotherapeutic drugs with different mechanisms of action in glioblastoma cell lines.METHODS: Differences in methylation levels in the SHP1 promoter and SHP1 protein expressions between untreated cells and cells treated with the demethylating agent decitabine were analyzed with bisulfite Pyrosequencing and Western blotting. Differences in drug sensitivity to a panel of chemotherapeutic drugs with different mechanisms of action between SHP1 overexpressing clones and control clones were analyzed with the fluorometric microculture cytotoxicity assay.RESULTS: We demonstrated that SHP1 promoter methylation was correlated to SHP1 expression and that the expression was increased upon demethylation. Overexpression of SHP1 resulted in lower (p < 0.05) sensitivity to the proteasome inhibitor bortezomib and the alkylating agents cisplatin and melphalan.CONCLUSION: SHP1 expression may be epigenetically regulated and its overexpression influences the sensitivity to chemotherapeutic drugs in glioblastoma derived cells.
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