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- Borssén, Magnus, et al.
(författare)
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DNA methylation holds prognostic information in relapsed precursor B-cell acute lymphoblastic leukemia
- 2018
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Ingår i: Clinical Epigenetics. - : BIOMED CENTRAL LTD. - 1868-7083 .- 1868-7075. ; 10
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Tidskriftsartikel (refereegranskat)abstract
- Background: Few biological markers are associated with survival after relapse of B-cell precursor acute lymphoblastic leukemia (BCP-ALL). In pediatric T-cell ALL, we have identified promoter-associated methylation alterations that correlate with prognosis. Here, the prognostic relevance of CpG island methylation phenotype (CIMP) classification was investigated in pediatric BCP-ALL patients.Methods: Six hundred and one BCP-ALL samples from Nordic pediatric patients (age 1-18) were CIMP classified at initial diagnosis and analyzed in relation to clinical data.Results: Among the 137 patients that later relapsed, patients with a CIMP-profile (n = 42) at initial diagnosis had an inferior overall survival (pOS(5years) 33%) compared to CIMP+ patients (n = 95, pOS(5years) 65%) (p = 0.001), which remained significant in a Cox proportional hazards model including previously defined risk factors.Conclusion: CIMP classification is a strong candidate for improved risk stratification of relapsed BCP-ALL.
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| 3. |
- Jalmsell, Li, et al.
(författare)
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Children with cancer share their views : tell the truth but leave room for hope
- 2016
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Ingår i: Acta Paediatrica. - : Wiley. - 0803-5253 .- 1651-2227. ; 105:9, s. 1094-1099
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Tidskriftsartikel (refereegranskat)abstract
- AimOne in five children diagnosed with cancer will die from the disease. The aim of the study was to explore how children with cancer want to receive bad news about their disease, such as when no more treatment options are available. MethodsWe conducted individual interviews with ten children with cancer, aged seven to 17 years, at a single paediatric oncology unit in central Sweden. Interviews were audio-taped and analysed with systematic text condensation. Bad news was defined as information about a potentially fatal outcome, such as a disease relapse, or information that the treatment administered was no longer working and that there was no more treatment possible. ResultsAll children expressed that they wanted truthful information and they did not want to be excluded from bad news regarding their illness. They wanted to be informed as positively as possible, allowing them to maintain hope, and in words that they could understand. They also wanted to receive any bad news at the same time as their parents. ConclusionChildren with cancer want to be fully informed about their disease, but they also wanted it to be relayed as positively as possible so that they could stay hopeful.
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| 5. |
- Jalmsell, Li, 1980-
(författare)
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Towards Good Palliation for Children with Cancer : Recognizing the Family and the Value of Communication
- 2015
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Pediatric cancer imposes a threat on the child’s life and approximately every fifth child diagnosed with cancer will die due to his or her disease. The overall aim of this thesis was to explore palliative care of children with cancer and bereaved family members. The thesis includes data collected retrospectively from medical records, a nationwide questionnaire directed to bereaved parents, a nationwide questionnaire for bereaved siblings and individual interviews with children in cancer care.Most children dying from cancer were recognized as being beyond cure at time of death; for some this recognition occurred close to death, leaving little time for potential personal preferences (Paper I). Bereaved parents and siblings noticed extensive suffering in the child close to death (Paper II, VI), with physical fatigue being the most commonly reported symptom irrespectively of age and diagnosis of the child (Paper II). Bereaved parents’ psychological well-being appears to be closely related to experiencing suffering in the dying child (Paper III) but also to high-intensity treatment (with bone marrow transplant as the example) of a child that still dies from his or her disease (Paper IV). Bereaved siblings experience a lack in information at the end of their brother’s or sister’s life and report feeling poorly prepared for the loss. An increased risk of anxiety was seen in siblings whom nobody talked to about what to expect at the time of death of their brother or sister (Paper VI). When caring for children with cancer it is vital to take the individual child’s awareness and preferences regarding information into consideration. Bereaved parents who have communicated with their child about death expressed that this often occurred at the child’s own initiative (Paper V) and simple means such as fairy tales could be used to facilitate communication. Ill children themselves expressed in interviews wanting honest, but still hopeful information regarding bad news (Paper VII).The results of this thesis stress the importance of striving to achieve good communication and keeping a family perspective throughout care of children with cancer.
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| 6. |
- Lindqvist, C. Mårten, et al.
(författare)
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Deep targeted sequencing in pediatric acute lymphoblastic leukemia unveils distinct mutational patterns between genetic subtypes and novel relapse-associated genes
- 2016
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Ingår i: Oncotarget. - : Impact Journals, LLC. - 1949-2553. ; 7:39, s. 64071-64088
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Tidskriftsartikel (refereegranskat)abstract
- To characterize the mutational patterns of acute lymphoblastic leukemia (ALL) we performed deep next generation sequencing of 872 cancer genes in 172 diagnostic and 24 relapse samples from 172 pediatric ALL patients. We found an overall greater mutational burden and more driver mutations in T-cell ALL (T-ALL) patients compared to B-cell precursor ALL (BCP-ALL) patients. In addition, the majority of the mutations in T-ALL had occurred in the original leukemic clone, while most of the mutations in BCP-ALL were subclonal. BCP-ALL patients carrying any of the recurrent translocations ETV6-RUNX1, BCR-ABL or TCF3-PBX1 harbored few mutations in driver genes compared to other BCP-ALL patients. Specifically in BCP-ALL, we identified ATRX as a novel putative driver gene and uncovered an association between somatic mutations in the Notch signaling pathway at ALL diagnosis and increased risk of relapse. Furthermore, we identified EP300, ARID1A and SH2B3 as relapse-associated genes. The genes highlighted in our study were frequently involved in epigenetic regulation, associated with germline susceptibility to ALL, and present in minor subclones at diagnosis that became dominant at relapse. We observed a high degree of clonal heterogeneity and evolution between diagnosis and relapse in both BCP-ALL and T-ALL, which could have implications for the treatment efficiency.
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| 7. |
- Lindqvist, C Mårten, et al.
(författare)
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The Mutational Landscape in Pediatric Acute Lymphoblastic Leukemia Deciphered by Whole Genome Sequencing
- 2015
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Ingår i: Human Mutation. - : Hindawi Limited. - 1059-7794 .- 1098-1004. ; 36:1, s. 118-128
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Tidskriftsartikel (refereegranskat)abstract
- Genomic characterization of pediatric acute lymphoblastic leukemia (ALL) has identified distinct patterns of genes and pathways altered in patients with well-defined genetic aberrations. To extend the spectrum of known somatic variants in ALL, we performed whole genome and transcriptome sequencing of three B-cell precursor patients, of which one carried the t(12;21)ETV6-RUNX1 translocation and two lacked a known primary genetic aberration, and one T-ALL patient. We found that each patient had a unique genome, with a combination of well-known and previously undetected genomic aberrations. By targeted sequencing in 168 patients, we identified KMT2D and KIF1B as novel putative driver genes. We also identified a putative regulatory non-coding variant that coincided with overexpression of the growth factor MDK. Our results contribute to an increased understanding of the biological mechanisms that lead to ALL and suggest that regulatory variants may be more important for cancer development than recognized to date. The heterogeneity of the genetic aberrations in ALL renders whole genome sequencing particularly well suited for analysis of somatic variants in both research and diagnostic applications.
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