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Genetic Basis of Congenital Erythrocytosis: Mutation Update and Online Databases
Department of Hematology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal .
Department of Haematology, Belfast City Hospital, Belfast, Northern Ireland, United Kingdom .
Unité Mixte de Recherche (UMR) 892 Inserm - 6299 CNRS, Université de Nantes, Nantes, France; Laboratoire de Génétique Oncologique de l'Ecole Pratique des Hautes Etudes (EPHE), INSERM U753, Institut de cancérologie Gustave Roussy, Villejuif, France .
Department of Hematology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal .
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2014 (English)In: Human Mutation, ISSN 1059-7794, E-ISSN 1098-1004, Vol. 35, no 1, 15-26 p.Article in journal (Refereed) Published
Abstract [en]

Congenital erythrocytosis (CE), or congenital polycythemia, represents a rare and heterogeneous clinical entity. It is caused by deregulated red blood cell production where erythrocyte overproduction results in elevated hemoglobin and hematocrit levels. Primary congenital familial erythrocytosis is associated with low erythropoietin (Epo) levels and results from mutations in the Epo receptor gene (EPOR). Secondary CE arises from conditions causing tissue hypoxia and results in increased Epo production. These include hemoglobin variants with increased affinity for oxygen (HBB, HBA mutations), decreased production of 2,3-bisphosphoglycerate due to BPGM mutations, or mutations in the genes involved in the hypoxia sensing pathway (VHL, EPAS1, and EGLN1). Depending on the affected gene, CE can be inherited either in an autosomal dominant or recessive mode, with sporadic cases arising de novo. Despite recent important discoveries in the molecular pathogenesis of CE, the molecular causes remain to be identified in about 70% of the patients. With the objective of collecting all the published and unpublished cases of CE the COST action MPN&MPNr-Euronet developed a comprehensive Internet-based database focusing on the registration of clinical history, hematological, biochemical, and molecular data (http://www.erythrocytosis.org/). In addition, unreported mutations are also curated in the corresponding Leiden Open Variation Database.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2014. Vol. 35, no 1, 15-26 p.
Keyword [en]
congenital erythrocytosis, molecular pathogenesis, online databases
National Category
Medical Genetics
Research subject
Genetics
Identifiers
URN: urn:nbn:se:oru:diva-38736DOI: 10.1002/humu.22448ISI: 000329678600002PubMedID: 24115288Scopus ID: 2-s2.0-84890804798OAI: oai:DiVA.org:oru-38736DiVA: diva2:764249
Available from: 2014-11-18 Created: 2014-11-18 Last updated: 2017-10-18Bibliographically approved

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