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Sökning: WFRF:(Jurczak Wojciech)

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1.
  • Machaczka, Maciej, et al. (författare)
  • Association between P-glycoprotein and lymphoid antigen expression on myeloblasts versus therapy response and survival in de novo acute myeloid leukemia : long-term follow-up results
  • 2012
  • Ingår i: Medical Oncology. - 1357-0560 .- 1559-131X. ; 29:3, s. 2070-2076
  • Tidskriftsartikel (refereegranskat)abstract
    • P-glycoprotein (PGP) over-expression on malignant cells is associated with poor prognosis and treatment outcome due to the development of a multidrug resistance phenotype. In this study, we analyzed the correlation between expression of PGP and lymphoid antigens (Ly) on leukemic myeloblasts versus response to therapy and survival in acute myeloid leukemia (AML). Fifty-one consecutive patients, aged 16–75 (median age 44.6 years), diagnosed with de novo AML between 1997 and 2000, and who received at least one induction chemotherapy course, were enrolled in the study. Expression of PGP on ≥10% of the myeloblasts (PGP+AML) at the time of diagnosis was observed in 21 patients (41%). The complete remission rate did not differ between PGP+ (13/21) and PGP− (20/30) patients (62 vs. 67%). Twelve of the 51 patients (24%) were still alive after a median follow-up time of 11.5 years (range 10.7–13.1). The Ly+AML patients showed significantly better overall survival compared with Ly−AML patients (8/18 vs. 4/33 patients alive at the last follow-up, P = 0.003). The subgroup of patients with co-expression of PGP and Ly also showed better overall survival compared with PGP+AML patients without Ly expression (4/8 vs. 0/13 patients alive at the last follow-up; P = 0.04). Our results suggest that expression of lymphoid antigens on PGP+ myeloblasts in AML can positively affect survival in AML patients, mainly due to a decreased relapse risk and better survival. Although the small number of patient may be perceived as a limitation of the study, the long follow-up period strengthens its value. Further prospective trials are needed to obtain more information concerning the association between PGP and lymphoid antigens in AML, which would put our results in their ultimate proper context.
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2.
  • Wu, Chenglin, et al. (författare)
  • Genetic heterogeneity in primary and relapsed mantle cell lymphomas : Impact of recurrent CARD11 mutations
  • 2016
  • Ingår i: OncoTarget. - 1949-2553 .- 1949-2553. ; 7:25, s. 38180-38190
  • Tidskriftsartikel (refereegranskat)abstract
    • The genetic mechanisms underlying disease progression, relapse and therapy resistance in mantle cell lymphoma (MCL) remain largely unknown. Whole-exome sequencing was performed in 27 MCL samples from 13 patients, representing the largest analyzed series of consecutive biopsies obtained at diagnosis and/or relapse for this type of lymphoma. Eighteen genes were found to be recurrently mutated in these samples, including known (ATM, MEF2B and MLL2) and novel mutation targets (S1PR1 and CARD11). CARD11, a scaffold protein required for B-cell receptor (BCR)-induced NF-kappa B activation, was subsequently screened in an additional 173 MCL samples and mutations were observed in 5.5% of cases. Based on in vitro cell line-based experiments, overexpression of CARD11 mutants were demonstrated to confer resistance to the BCR-inhibitor ibrutinib and NF-kappa B-inhibitor lenalidomide. Genetic alterations acquired in the relapse samples were found to be largely non-recurrent, in line with the branched evolutionary pattern of clonal evolution observed in most cases. In summary, this study highlights the genetic heterogeneity in MCL, in particular at relapse, and provides for the first time genetic evidence of BCR/NF-kappa B activation in a subset of MCL.
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4.
  • Hess, Georg, et al. (författare)
  • Health-related quality of life data from a phase 3, international, randomized, open-label, multicenter study in patients with previously treated mantle cell lymphoma treated with ibrutinib versus temsirolimus
  • 2017
  • Ingår i: Leukemia and Lymphoma. - : Taylor & Francis. - 1042-8194. ; 58:12, s. 2824-2832
  • Tidskriftsartikel (refereegranskat)abstract
    • Mantle cell lymphoma (MCL) is a rare, aggressive, incurable B-cell malignancy. Ibrutinib has been shown to be highly active for patients with relapsed/refractory (R/R) MCL. The RAY trial (MCL3001) was a phase 3, randomized, open-label, multicenter study that compared ibrutinib with temsirolimus in patients with R/R MCL. Active disease is frequently associated with impaired functional status and reduced well-being. Therefore, the current study employed two patient-reported outcome instruments, the Functional Assessment of Cancer Therapy-Lymphoma (FACT-Lym) and the EQ-5D-5L, to assess symptoms, well-being, health status, and health-related quality of life of patients on treatment within the RAY trial. We found that patients on ibrutinib had substantial improvement in FACT-Lym subscale and total scores, and had improvement in EQ-5D-5L utility and VAS scores compared with temsirolimus patients, indicating a superior well-being. These improvements in well-being correlated with clinical response, indicating that better health-related quality of life was associated with decreased disease burden.
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