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  • 1.
    Jakobsen Falk, Ingrid
    et al.
    Linköping University, Department of Medical and Health Sciences, Division of Drug Research. Linköping University, Faculty of Health Sciences.
    Willander, Kerstin
    Linköping University, Department of Clinical and Experimental Medicine, Division of Cell Biology. Linköping University, Faculty of Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Haematology.
    Chaireti, Roza
    Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences. Region Östergötland, Local Health Care Services in Central Östergötland, Department of Acute Internal Medicine. Karolinska University Hospital, Sweden.
    Lund, Johan
    Huddinge University Hospital, Sweden.
    Nahi, Hareth
    Huddinge University Hospital, Sweden.
    Hermanson, Monica
    Uppsala University, Sweden.
    Green, Henrik
    National Board Forens Med, Department Forens Genet and Forens Toxicol, Linkoping, Sweden.
    Lotfi, Kourosh
    Linköping University, Department of Medical and Health Sciences, Division of Drug Research. Linköping University, Faculty of Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Haematology.
    Söderkvist, Peter
    Linköping University, Department of Clinical and Experimental Medicine, Division of Cell Biology. Linköping University, Faculty of Health Sciences. Region Östergötland, Center for Diagnostics, Department of Clinical Pathology and Clinical Genetics.
    TP53 mutations and MDM2(SNP309) identify subgroups of AML patients with impaired outcome2015In: European Journal of Haematology, ISSN 0902-4441, E-ISSN 1600-0609, Vol. 94, no 4, p. 355-362Article in journal (Refereed)
    Abstract [en]

    BackgroundTP53 is commonly mutated in several cancers and confers treatment resistance and poor prognosis. Altered expression of mouse double minute 2 (MDM2), a negative regulator of p53, may also attenuate normal p53 signaling, thereby enhancing tumor transformation and resistance to apoptosis. The single nucleotide polymorphism (SNP) 309 has been reported to increase MDM2 expression and impair normal p53 response. Experimental designWe investigated the frequency and impact of TP53 mutations (TP53mut) and MDM2(SNP309) on treatment outcome and overall survival (OS) in 189 Swedish acute myeloid leukemia patients. The genetic analyses were performed using SSCA and direct sequencing (for mutations in exon 5-8 of TP53) and Pyrosequencing (for the MDM2(SNP309)). ResultsWe found a high frequency (22%) of TP53mut in patients with cytogenetic aberrations, with association to high-risk cytogenetics (Pless than0.001). TP53mut patients had lower response rates (22% compared with 76% CR in TP53 wild-type (wt) patients, Pless than0.001) and reduced OS (2 and 16months, respectively, Pless than0.001). In TP53wt patients with high or intermediate risk cytogenetic aberrations, the MDM2(SNP309) conferred an impaired outcome, with patients carrying the alternative G-allele having shorter OS compared with T/T patients (median 9 vs. 50months, P=0.020). ConclusionsOur results show that TP53mut analysis and MDM2(SNP309) genotyping may be useful tools for prognostication, risk stratification, and selection of patients most likely to benefit from new drugs targeting the p53 signaling pathway.

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