Abstract
Human Parvovirus B19 (PVB19) is one of the most important pathogens that targets erythroid lineage. Many factors were mentioned for restriction to erythroid progenitor cells (EPCs). Previous studies showed that in non-permissive cells VP1 and VP2 (structural proteins) mRNAs were detected but could not translate to proteins. A bioinformatics study showed that this inhibition might be due to specific microRNAs (miRNAs) present in non-permissive cells but not in permissive EPCs. To confirm the hypothesis, we evaluated the effect of miRNAs on VP expression. CD34+ HSCs were separated from cord blood. Then, CD34+ cells were treated with differentiation medium to obtain CD36+ EPCs. To evaluate the effect of miRNAs on VP expression in MCF7 and HEK-293 cell lines (non-permissive cells) and CD36+ EPCs, dual luciferase assay was performed in presence of shRNAs against Dicer and Drosha to disrupt miRNA biogenesis. QRT-PCR was performed to check down-regulation of Dicer and Drosha after transfection. All measurements were done in triplicate. Data means were compared using one-way ANOVAs. MicroRNA prediction was done by the online microRNA prediction tools. No significant difference was shown in luciferase activity of CD36+ EPCs after co-transfection with shRNAs, while it was significant in non-permissive cells. Our study revealed that miRNAs may be involved in inhibition of VP expression in non-permissive cells, although further studies are required to demonstrate which miRNAs exactly are involved in regulation of PVB19 replication.
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The present work supported by Stem Cell Technology Research Center, Tehran, Iran.
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Azadeh Anbarlou and Mahshid AkhavanRahnama have contributed equally as first author to this work.
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Anbarlou, A., AkhavanRahnama, M., Atashi, A. et al. Possible involvement of miRNAs in tropism of Parvovirus B19. Mol Biol Rep 43, 175–181 (2016). https://doi.org/10.1007/s11033-016-3952-8
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DOI: https://doi.org/10.1007/s11033-016-3952-8