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Hypoxia enhances human B19 erythrovirus gene expression in primary erythroid cells #MMPMID15327892
Pillet S; Le Guyader N; Hofer T; NguyenKhac F; Koken M; Aubin JT; Fichelson S; Gassmann M; Morinet F
Virology 2004[Sep]; 327 (1): 1-7 PMID15327892show ga
Human B19 erythrovirus replicates in erythroid progenitors present in bone marrow and fetal tissues where partial oxygen tension is low. Here we show that infected human primary erythroid progenitor cells exposed to hypoxia (1% O2) in vitro increase viral capsid protein synthesis, virus replication, and virus production. Hypoxia-inducible factor-1 (HIF-1), the main transcription factor involved in the cellular response to reduced oxygenation, is shown to bind an HIF binding site (HBS) located in the distal part of the B19 promoter region, but the precise mechanism involved in the oxygen-sensitive upregulation of viral gene expression remains to be elucidated.