Most pediatric patients with essential thrombocythemia show hypersensitivity to erythropoietin in vitro, with rare JAK2 V617F-positive erythroid colonies
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
17719087
DOI
10.1016/j.leukres.2007.07.011
PII: S0145-2126(07)00296-2
Knihovny.cz E-resources
- MeSH
- Clone Cells MeSH
- Child MeSH
- Erythropoietin blood pharmacology MeSH
- Erythroid Precursor Cells drug effects MeSH
- Erythropoiesis MeSH
- Thrombocythemia, Essential genetics MeSH
- Genotype MeSH
- Hematopoietic Stem Cells MeSH
- Janus Kinase 2 genetics MeSH
- Humans MeSH
- Adolescent MeSH
- Mutation * MeSH
- Thrombocytosis genetics MeSH
- Check Tag
- Child MeSH
- Humans MeSH
- Adolescent MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Erythropoietin MeSH
- Janus Kinase 2 MeSH
Essential thrombocythemia (ET), a Philadelphia (Ph) chromosome negative chronic myeloproliferative disorder, is usually a disease of middle age and it is extremely rare in pediatric patients. In this report we studied 12 children diagnosed with ET and one child with thrombocytosis and family history of ET. We failed to detect JAK2 V617F mutation either in peripheral blood leukocytes or in separated platelets and granulocytes. Monoclonal hematopoiesis was noted in only one female patient. Erythroid progenitors of most of the patients displayed hypersensitivity to erythropoietin (Epo) in vitro; Epo-independent erythroid colonies (EECs) were detected in seven patients. Among EECs of three patients we observed rare colonies heterozygous or homozygous for the JAK2 V617F mutation. Our data suggest that childhood ET patients could bear minor JAK2 V617F-positive subclones.
References provided by Crossref.org
