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Sökning: WFRF:(Kõrgvee Lenne Triin)

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1.
  • Ifversen, Marianne, et al. (författare)
  • Low burden of minimal residual disease prior to transplantation in children with very high risk acute lymphoblastic leukaemia : The NOPHO ALL2008 experience
  • 2019
  • Ingår i: British Journal of Haematology. - : Wiley. - 0007-1048 .- 1365-2141. ; 184:6, s. 982-993
  • Tidskriftsartikel (refereegranskat)abstract
    • The population-based Nordic/Baltic acute lymphoblastic leukaemia (ALL) Nordic Society for Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol combined minimal residual disease (MRD)-driven treatment stratification with very intense first line chemotherapy for patients with high risk ALL. Patients with MRD >= 5% at end of induction or >= 10(-3) at end of consolidation or following two high risk blocks were eligible for haematopoietic cell transplantation (HCT) in first remission. After at least three high risk blocks a total of 71 children received HCT, of which 46 had MRD >= 5% at end of induction. Ten patients stratified to HCT were not transplanted; 12 received HCT without protocol indication. Among 69 patients with evaluable pre-HCT MRD results, 22 were MRD-positive, one with MRD >= 10(-3). After a median follow-up of 5 center dot 5 years, the cumulative incidence of relapse was 23 center dot 5% (95% confidence interval [CI]: 10 center dot 5-47 center dot 7) for MRD-positive versus 5 center dot 1% (95% CI: 1 center dot 3-19 center dot 2), P = 0 center dot 02) for MRD-negative patients. MRD was the only variable significantly associated with relapse (hazard ratio 9 center dot 1, 95% CI: 1 center dot 6-51 center dot 0, P = 0 center dot 012). Non-relapse mortality did not differ between the two groups, resulting in disease-free survival of 85 center dot 6% (95% CI: 75 center dot 4-97 center dot 2) and 67 center dot 4% (95% CI: 50 center dot 2-90 center dot 5), respectively. In conclusion, NOPHO block treatment efficiently reduced residual leukaemia which, combined with modern transplant procedures, provided high survival rates, also among pre-HCT MRD-positive patients.
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2.
  • Takkis, Kalev, et al. (författare)
  • Signal Enhancement in the HPLC-ESI-MS/MS analysis of spironolactone and its metabolites using HFIP and NH4F as eluent additives
  • 2017
  • Ingår i: Analytical and Bioanalytical Chemistry. - : Springer. - 1618-2642 .- 1618-2650. ; 409:12, s. 3145-3151
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper describes an LC-MS/MS method to determine the concentration of spironolactone and its metabolites 7-alpha-methylthiospironolactone and canrenone in blood plasma samples. The resulting assay is simple (using protein precipitation for sample preparation) and sensitive (the lower limit of quantification is close to 0.5 ng/ml) while requiring only 50 mu l of plasma, making it especially suitable for analyzing samples obtained from pediatric and neonatal patients where sample sizes are limited. The sensitivity is achieved by using ammonium fluoride as an eluent additive, which in our case amplifies the signal from our analytes in the plasma solution on average about 70 times. The method is fully validated according to the European Medicines Agency's guideline and used for the measurement of pediatric patients' samples in clinical trials for evaluating oral spironolactone's and its metabolites' pharmacokinetics in children up to 2 years of age.
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