Cited by 157Erythropoietin and Anemia TreatmentPulmonary Hypertension Research and TreatmentsMyeloproliferative Neoplasms: Diagnosis and Treatment

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Autosomal dominant erythrocytosis and pulmonary arterial hypertension associated with an activating HIF2α mutation

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Abstract

investigated for BCR-ABL transcripts with 2 different polymerase chain reaction (PCR) methods as previously described in detail.1,2 Forty-six (1.8%) cases showed an ambiguous result and were not considered for further analysis.Of the remaining 2498 cases, 904 (36.2%) were BCR-ABL ϩ (599 ϭ 24% minor breakpoint region [m-bcr] and 282 ϭ 11.3% major breakpoint region [M-bcr], 15 ϭ 0.6% both, M-bcr and m-bcr, and 8 atypical transcripts), and 1594 were BCR-ABL Ϫ .Atypical transcripts were not systematically detected before 2000 1 and thus had to be excluded from further analysis.We grouped patients into age cohorts at 10-year intervals according to their age at diagnosis, each comprising between 277 and 481 patients and found a remarkable increase of BCR-ABL frequency in adolescents and young adults (Figure 1).It increased from 12.7% in adolescents (15-24 years) to 30.6% and 43.7% in patients aged 25 to 34 and 35 to 44 years, respectively.In patients older than 44 years, the BCR-ABL frequency showed no further increment and ranged between 42% and 44%.The increase of BCR-ABL frequency was paralleled by a relative increase of M-bcr transcripts.These transcripts accounted for 16.4% of all BCR-ABL-positive cases in adolescents (15-24 years).Their relative frequency increased to 22.5% in 25-to 34-year-olds and to 36.8% in 35-to 44-year-olds and remained between 33% and 36.2% from then on.The reason for this age dependency is not obvious.The relative frequencies of immunologic subtypes (78.2% common, 19.9% pre-B, 1.9% pro-B) of BCR-ABL ϩ patients did not differ significantly across the age groups.Moreover, the frequency of BCR-ABL was also not significantly different in woman compared with men.Our study excluded lymphatic blast crises in patients with known chronic myeloid leukemia (CML).Previous work has indicated that M-bcr-and m-bcr-positive ALL may arise from different sets of hematopoietic progenitor cells, 3 but this does not explain the age dependency.A number of genetic markers in ALL show a marked age dependency (reviewed in Armstrong and Look 4 ), eg, TEL-AML1, TLX1, and TLX3, MLL aberrations (especially in infant ALL).Our data provide additional information on the biology of BCR-ABL-positive ALL and substantiate evidence of age-dependent variation in the genetic background of ALL.

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Metadata

Authors
Gale, D. P., Harten, S. K., Reid, C. D. L., Tuddenham, E. G. D., & Maxwell, P. H.
Venue
Blood
Published
2008-08-01
Volume
112
Issue
3
Pages
919-921
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2074813003
Cited by
157
References
11
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 13 · 2022: 4 · 2021: 15 · 2020: 6 · 2019: 11 · 2018: 11 · 2017: 10 · 2016: 19 · 2015: 10 · 2014: 9 · 2013: 10 · 2012: 4
FWCI
4.98
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • National Institute for Health and Care Research (NF-SI-0507-10315)
  • British Heart Foundation
Topics
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Pulmonary Hypertension Research and Treatments
  • Health Sciences › Medicine › Hematology › Myeloproliferative Neoplasms: Diagnosis and Treatment
Keywords
pulmonary arterial hypertension, erythropoietin, hypoxia-inducible factor, VHL, erythrocytosis
MeSH terms
Endothelial PAS Domain-Containing Protein 1, Adolescent, Adult, Aged, Humans, Hypertension, Pulmonary, Middle Aged, Mutation, Polycythemia, Basic Helix-Loop-Helix Proteins

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