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Sökning: WFRF:(Out Luiting Jacoba J.)

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1.
  • Lacson, John Charles A., et al. (författare)
  • Birth cohort-specific trends of sun-related behaviors among individuals from an international consortium of melanoma-prone families
  • 2021
  • Ingår i: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 21:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Individuals from melanoma-prone families have similar or reduced sun-protective behaviors compared to the general population. Studies on trends in sun-related behaviors have been temporally and geographically limited. Methods: Individuals from an international consortium of melanoma-prone families (GenoMEL) were retrospectively asked about sunscreen use, sun exposure (time spent outside), sunburns, and sunbed use at several timepoints over their lifetime. Generalized linear mixed models were used to examine the association between these outcomes and birth cohort defined by decade spans, after adjusting for covariates. Results: A total of 2407 participants from 547 families across 17 centers were analyzed. Sunscreen use increased across subsequent birth cohorts, and although the likelihood of sunburns increased until the 1950s birth cohort, it decreased thereafter. Average sun exposure did not change across the birth cohorts, and the likelihood of sunbed use increased in more recent birth cohorts. We generally did not find any differences in sun-related behavior when comparing melanoma cases to non-cases. Melanoma cases had increased sunscreen use, decreased sun exposure, and decreased odds of sunburn and sunbed use after melanoma diagnosis compared to before diagnosis. Conclusions: Although sunscreen use has increased and the likelihood of sunburns has decreased in more recent birth cohorts, individuals in melanoma-prone families have not reduced their overall sun exposure and had an increased likelihood of sunbed use in more recent birth cohorts. These observations demonstrate partial improvements in melanoma prevention and suggest that additional intervention strategies may be needed to achieve optimal sun-protective behavior in melanoma-prone families.
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2.
  • Vermeer, Maarten H, et al. (författare)
  • Novel and highly recurrent chromosomal alterations in Sézary syndrome
  • 2008
  • Ingår i: Cancer Research. - 0008-5472 .- 1538-7445. ; 68:8, s. 2689-2698
  • Tidskriftsartikel (refereegranskat)abstract
    • This study was designed to identify highly recurrent genetic alterations typical of Sezary syndrome (Sz), an aggressive cutaneous T-cell lymphoma/leukemia, possibly revealing pathogenetic mechanisms and novel therapeutic targets. High-resolution array-based comparative genomic hybridization was done on malignant T cells from 20 patients. Expression levels of selected biologically relevant genes residing within loci with frequent copy number alteration were measured using quantitative PCR. Combined binary ratio labeling-fluorescence in situ hybridization karyotyping was done on malignant cells from five patients. Minimal common regions with copy number alteration occurring in at least 35% of patients harbored 15 bona fide oncogenes and 3 tumor suppressor genes. Based on the function of the identified oncogenes and tumor suppressor genes, at least three molecular mechanisms are relevant in the pathogenesis of Sz. First, gain of cMYC and loss of cMYC antagonists (MXI1 and MNT) were observed in 75% and 40% to 55% of patients, respectively, which were frequently associated with deregulated gene expression. The presence of cMYC/MAX protein heterodimers in Sezary cells was confirmed using a proximity ligation assay. Second, a region containing TP53 and genome maintenance genes (RPA1/HIC1) was lost in the majority of patients. Third, the interleukin 2 (IL-2) pathway was affected by gain of STAT3/STAT5 and IL-2 (receptor) genes in 75% and 30%, respectively, and loss of TCF8 and DUSP5 in at least 45% of patients. In sum, the Sz genome is characterized by gross chromosomal instability with highly recurrent gains and losses. Prominent among deregulated genes are those encoding cMYC, cMYC-regulating proteins, mediators of MYC-induced apoptosis, and IL-2 signaling pathway components.
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