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Träfflista för sökning "WFRF:(Nahi H) srt2:(2005-2009)"

Sökning: WFRF:(Nahi H) > (2005-2009)

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  • Nahi, Hareth, et al. (författare)
  • An investigation into whether deletions in 9p reflect prognosis in adult precursor B-cell acute lymphoblastic leukemia : a multi-center study of 381 patients
  • 2008
  • Ingår i: Haematologica. - Pavia : Ferrata Storti Foundation. - 1592-8721 .- 0390-6078. ; 93:11, s. 8-1734
  • Tidskriftsartikel (refereegranskat)abstract
    • In acute lymphoblastic leukemia, besides age and white cell count at diagnosis, the cytogenetic abnormalities t(9;22)/BCR-ABL and t(4;11)/MLL-AF4 are important prognostic markers and are often included in the treatment stratification of patients with adult acute lymphoblastic leukemia. Deletions in 9p are seen in about 9% of cases of adult acute lymphoblastic leukemia, but their prognostic impact has been controversial. Cytogenetic data from 381 patients diagnosed with B-precursor acute lymphoblastic leukemia were reviewed. Chromosomal analysis was successful in 240 cases. Of these cases, 18 (8%) had abnormalities in 9p and they were compared with patients with normal karyotypes and patients with t(9;22)/BCR-ABL. Patients with abnormalities of chromosome 9 showed significantly shorter overall survival compared with patients with normal karyotypes. In fact, overall survival was similar to that in the poor prognosis t(9;22)/BCR-ABL-positive group. Our data suggest that chromosomal abnormalities involving 9p may have a significant negative impact on survival in adult B-precursor acute lymphoblastic leukemia.
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  • Paul, Esbjörn, et al. (författare)
  • Low p14ARF expression in de novo acute myeloid leukemia with normal karyotype is associated with poor survival
  • 2009
  • Ingår i: Leukemia and Lymphoma. - 1042-8194 .- 1029-2403. ; 50:9, s. 1512-1518
  • Tidskriftsartikel (refereegranskat)abstract
    • The p14ARF protein activates the p53 tumor suppressor by binding to and inhibiting its negative regulator HDM-2. We have studied the prognostic impact of p14ARF in acute myeloid leukemia (AML). Leukemic cells from 57 adult patients with normal karyotype de novo AML were analyzed for p14ARF mRNA expression level using real-time polymerase chain reaction (RT-PCR). We also tested the effect of conventional anti-leukemic drugs and the mutant p53-targeting small molecule PRIMA-1 in vitro. Patients whose cells expressed more p14ARF mRNA than the 75th percentile (0.26) had significantly better survival compared with those expressing lower levels, 61 vs. 30% 3-year survival (p = 0.046). The difference remained significant also when NPM1/FLT3 status was considered. The mean effects of all the tested conventional anti-leukemic drugs were greater in leukemic cell samples expressing p14ARF mRNA >or= 0.26, but the differences were not statistically significant. In contrast, PRIMA-1 had a significantly greater effect on leukemic cell samples with low levels of p14ARF mRNA. We conclude that low levels of p14ARF mRNA in leukemic cells from patients with normal karyotype AML is associated with poor prognosis. Treatment with drugs targeting p53 may be a future possibility to improve outcome for these patients.
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