Circadian regulation of human immunodeficiency virus type 1 replication
Borrmann, H.; Ulkar, G.; Kliszczak, A. E.; Ismed, D.; Schilling, M.; Magri, A.; Harris, J. M.; Balfe, P.; Vasudevan, S.; Borrow, P.; Zhuang, X.; McKeating, J. A.
Show abstract
Human immunodeficiency virus 1 (HIV-1) is a life-threatening pathogen that still lacks curative therapies or vaccines. Circadian rhythms are endogenous daily oscillations that coordinate an organisms response to its environment and invading pathogens. Recent reports of diurnal variation in peripheral viral load in HIV-1 infected subjects highlights the need for mechanistic studies. Here, we demonstrate rhythmic HIV-1 replication in circadian-synchronised model systems and show the circadian transcription factors, BMAL1 and REV-ERB, bind conserved motifs in the HIV-1 promoter. REV-ERB competes with ROR for binding to the same regulatory motif, and we uncover a role for ROR inhibitors to perturb rhythmic HIV-1 replication and host gene expression. We demonstrate that many HIV-1 host factors are circadian regulated and likely to define rhythmic viral replication. In summary, this study increases our understanding of the mechanisms underlying the circadian regulation of HIV that can inform HIV therapy and management.
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