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Genetic landscape o...
Genetic landscape of high hyperdiploid childhood acute lymphoblastic leukemia
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- Paulsson, Kajsa (author)
- Lund University,Lunds universitet,Avdelningen för klinisk genetik,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Genetics,Department of Laboratory Medicine,Faculty of Medicine
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- Forestier, Erik (author)
- Umeå universitet,Pediatrik,Umea University
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- Lilljebjörn, Henrik (author)
- Lund University,Lunds universitet,Avdelningen för klinisk genetik,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Genetics,Department of Laboratory Medicine,Faculty of Medicine
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- Heldrup, Jesper (author)
- Lund University,Lunds universitet,Pediatrik, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Paediatrics (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Behrendtz, Mikael (author)
- Östergötlands Läns Landsting,Barn- och ungdomskliniken i Linköping
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- Young, Bryan D (author)
- Barts and Royal London School Medicine
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- Johansson, Bertil (author)
- Lund University,Lunds universitet,Avdelningen för klinisk genetik,Institutionen för laboratoriemedicin,Medicinska fakulteten,Genetiska och epigenetiska studier av barnleukemi,Forskargrupper vid Lunds universitet,Division of Clinical Genetics,Department of Laboratory Medicine,Faculty of Medicine,Genetic and epigenetic studies of pediatric leukemia,Lund University Research Groups
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(creator_code:org_t)
- 2010-11-22
- 2010
- English.
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In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - : National Academy of Sciences; 1999. - 0027-8424 .- 1091-6490. ; 107:50, s. 21719-21724
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Abstract
Subject headings
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- High hyperdiploid acute lymphoblastic leukemia ( ALL) is one of the most common malignancies in children. It is characterized by gain of chromosomes, typically +X, +4, +6, +10, +14, +17, +18, and +21, +21; little is known about additional genetic aberrations. Approximately 20% of the patients relapse; therefore it is clinically important to identify risk-stratifying markers. We used SNP array analysis to investigate a consecutive series of 74 cases of high hyperdiploid ALL. We show that the characteristic chromosomal gains are even more frequent than previously believed, indicating that karyotyping mistakes are common, and that almost 80% of the cases display additional abnormalities detectable by SNP array analysis. Subclonality analysis strongly implied that the numerical aberrations were primary and arose before structural events, suggesting that step-wise evolution of the leukemic clone is common. An association between duplication of 1q and +5 was seen ( P = 0.003). Other frequent abnormalities included whole-chromosome uniparental isodisomies ( wUPIDs) 9 and 11, gain of 17q not associated with isochromosome formation, extra gain of part of 21q, deletions of ETS variant 6 (ETV6), cyclin-dependent kinase inhibitor 2A (CKDN2A) and paired box 5 (PAX5), and PAN3 poly(A) specific ribonuclease subunit homolog (PAN3) microdeletions. Comparison of whole-chromosome and partial UPID9 suggested different pathogenetic outcomes, with the former not involving CDKN2A. Finally, two cases had partial deletions of AT rich interactive domain 5B (ARID5B), indicating that acquired as well as constitutional variants in this locus may be associated with pediatric ALL. Here we provide a comprehensive characterization of the genetic landscape of high hyperdiploid childhood ALL, including the heterogeneous pattern of secondary genetic events.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Medicinsk genetik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medical Genetics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Pediatrik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Pediatrics (hsv//eng)
Keyword
- MEDICINE
- MEDICIN
Publication and Content Type
- ref (subject category)
- art (subject category)
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