Familial erythrocytosis associated with a short deletion in the erythropoietin receptor gene.

Authors: Arcasoy, MO  Degar, BA  Harris, KW  Forget, BG 
Citation: Arcasoy MO, etal., Blood. 1997 Jun 15;89(12):4628-35.
Pubmed: (View Article at PubMed) PMID:9192789

Familial erythrocytosis (familial polycythemia) inherited as an autosomal dominant trait has recently been reported to be associated with mutations in the gene encoding the erythropoietin receptor (EpoR) in a small number of families. We studied a new kindred with dominantly inherited familial erythrocytosis associated with heterozygosity for a deletion of seven nucleotides between positions 5985 and 5991 in exon 8 of the EpoR gene, resulting in an EpoR peptide that is truncated by 59 amino acids at its C-terminus. A 7-bp direct repeat is present in the normal EpoR gene at the site of this mutation, consistent with the slipped mispairing model for the generation of short deletions during DNA replication. Hypersensitivity to Epo of erythroid progenitors from an affected individual was observed in in vitro methylcellulose cultures, as indicated by more numerous and larger colonies compared with those of a control subject. To study mutant EpoR function, the cDNA encoding the mutant EpoR was synthesized by reverse transcription-polymerase chain reaction of peripheral blood RNA from the proband and stably tranfected into murine interleukin-3-dependent 32D cells. Epo dose-response assays showed that cells expressing the mutant EpoR displayed fivefold to 10-fold increased sensitivity to Epo compared with cells expressing similar numbers of the wild-type EpoR.

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CRRD Object Information
CRRD ID: 11041638
Created: 2016-03-25
Species: All species
Last Modified: 2016-03-25
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.