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The role of oxygen tension level is a well-known phenomenon that has been studied in oncology and radiotherapy since about 60 years. Oxygen tension may inhibit or stimulate propagation of viruses in vitro as well as in vivo. In turn modulating oxygen metabolism may constitute a novel approach to treat viral infections as an adjuvant therapy. The major transcription factor which regulates oxygen tension...
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% O 2 ) in vitro increase viral capsid protein synthesis, virus replication, and virus production. Hypoxia-inducible factor-1 (HIF-1), the main transcription factor involved...
Human parvovirus B19 replicates and encapsidates its genome in the nucleus of erythroid progenitors in vivo and in vitro. We wanted to understand the determinants necessary for the nuclear transport of the major coat protein, VP2, which makes up about 96% of the viral capsid proteins. A nonconsensus basic motif, KLGPRKATGRW, necessary for the nuclear localization of VP2 was identified and shown to...
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