Figure 3From: Vpx rescue of HIV-1 from the antiviral state in mature dendritic cells is independent of the intracellular deoxynucleotide concentrationExogenous deoxynucleosides and SAMHD1 KD do not rescue SIV from the antiviral state. MDDCs were treated for 3 hrs with 3 mM deoxynucleosides (dN) and either challenged with a VSV G pseudotyped SIV-GFP reporter vector deleted for Vpx (SIVΔVpx) or not (SIV Vpx+) or with an HIV-1-GFP reporter vector. The viruses were normalized by titration on HeLa cells. Values are displayed in %GFP positive cells (A) or fold rescue by exogenous deoxynucleosides (B). MDDCs were stimulated with 100 ng/ml LPS for 18 hrs, treated with 2.5 mM deoxynucleosides (dN) for 2 hrs and challenged with a SIVΔVpx or HIV-1 reporter vector. Values are displayed in %GFP positive cells (C) or fold-rescue by exogenous deoxynucleosides (D). To achieve SAMHD1 knockdown, freshly isolated CD14+ monocytes were treated for 2 hrs with Vpx-VLPs and then transduced with a lentiviral vector expressing shRNA targeting SAMHD1 (SAMHD1 KD) or luciferase (control KD) and differentiated into MDDCs over 5 days. 0.5 × 106 were used to assess knockdown efficency by western blot (E). Knockdown cells were stimulated with 100 ng/ml LPS and challenged with a Vpx + SIV GFP reporter vector (SIVMAC239) (F).Back to article page