Into an Eppendorf tube and stained with Rhodamine phalloidin [red](Invitrogen) for 20 minutes, washed with PBS, and incubated with HSV-1 (KOS) K26GFP for 2 hours at 37uC. Leica Confocal microscopy software was utilized to identify Argipressin chemical information co-localization of SnO2 with HSV-1. doi:10.1371/journal.pone.0048147.g1338247-35-0 infected at a MOI of 0.001 with HSV-1 KOS virus strain. 25033180 2 hours post infection inoculums were removed and methylcellulose (Sigma) was added to the wells. Cells were then incubated at 37uC for 3 days. At the end of the incubation cells were fixed with methanol for 20 minutes at room temperature and stained with crystal violet. Plaques were counted and imaged at 106 objective (Zeiss Axiovert 200).HSV-1(KOS) K26RFP Virus Spread AssayA virus-spread assay was performed as described previously [22]. Briefly, a monolayer of HCE cells were treated (or mock treated) with 500 mg/ml of SnO2 and challenged with HSV1(KOS) K26RFP virus strain at a MOI of 0.001. 2 hours post infection inoculum was removed. Cells were washed once with PBS and overlaid with methylcellulose (Sigma) MEM medium. 72 hours post infection the spread of HSV-1(KOS) K26RPF amongst HCE cells was assessed by capturing images of the red virally infected cell clusters using a 106 objective (Zeiss Axiovert 200).plasmid pCalifGT7, which expresses T7 RNA polymerase. Fusion between both populations of cells allows the T7 polymerase to bind its promoter thus activating the synthesis of the luciferase gene. Following addition of the substrate, (D-luciferin), the extent of fusion between target and effector cells can be analyzed. At 24 hours post transfection effector and target cells were either mock treated or treated with 500 mg/ml of SnO2 nanowires during their 1:1 co-culture in a 24-well dish. 24 hours post mixing effector and target cell luciferase gene expression resulting from fusion was measured using a reporter lysis assay (Promega).Mixing of Fluorescent-labeled SnO2 with GFP-tagged HSV-The binding ability of SnO2 nanowires to HSV-1(KOS) K26GFP was determined by mixing fluorescently labeled SnO2 with HSV-1 (KOS) K26GFP. First 500 ml of PBS was added to 0.5 mg of SnO2 and sonicated for solubility. 20 ml of this SnO2 solution was then added to 20 ml of 10 nm Rhodamine phallodin [13] (Invitrogen) and incubated at room temperature for 30 minutes. At the end of incubation the SnO2 particles were washed by centrifuged twice with PBS to remove unbound dye. At the completion of the wash step the fluorescently labeled SnO2 nanowire pellet was resuspended in 400 ml of OptiMEM media. HSV-1 (KOS) K26GFP virus was then added to 200 ml of the labeled SnO2 nanowire solution and placed in a 35 mm glass bottom dish and incubated for 2 hours at 37uC. A second dish with the other 200 ml of labeled SnO2 was used as a control. At the end of incubation the fluorescently labeled SnO2 nanowires and HSVVirus-free Cell-to-cell Fusion AssayA standard virus free cell-to-cell fusion assay was performed as described previously [20,21]. To create the fusion process in vitro CHO-K1 cells were split into two populations: target cells, and effector cells [23?5]. The target cell population was transfected with 1.0 mg of gD receptor (Nectin-1) and 0.5 mg of the plasmid expressing the luciferase gene. The effector cell population was transfected with 0.5 mg each of HSV-1 glycoproteins pPEP98 (gB), pPEP99 (gD), pPEP100 (gH), and pPEP101 (gL), along withTin Oxide Nanowires as Anti-HSV Agents1(KOS) K26GFP (as well as the c.Into an Eppendorf tube and stained with Rhodamine phalloidin [red](Invitrogen) for 20 minutes, washed with PBS, and incubated with HSV-1 (KOS) K26GFP for 2 hours at 37uC. Leica Confocal microscopy software was utilized to identify co-localization of SnO2 with HSV-1. doi:10.1371/journal.pone.0048147.ginfected at a MOI of 0.001 with HSV-1 KOS virus strain. 25033180 2 hours post infection inoculums were removed and methylcellulose (Sigma) was added to the wells. Cells were then incubated at 37uC for 3 days. At the end of the incubation cells were fixed with methanol for 20 minutes at room temperature and stained with crystal violet. Plaques were counted and imaged at 106 objective (Zeiss Axiovert 200).HSV-1(KOS) K26RFP Virus Spread AssayA virus-spread assay was performed as described previously [22]. Briefly, a monolayer of HCE cells were treated (or mock treated) with 500 mg/ml of SnO2 and challenged with HSV1(KOS) K26RFP virus strain at a MOI of 0.001. 2 hours post infection inoculum was removed. Cells were washed once with PBS and overlaid with methylcellulose (Sigma) MEM medium. 72 hours post infection the spread of HSV-1(KOS) K26RPF amongst HCE cells was assessed by capturing images of the red virally infected cell clusters using a 106 objective (Zeiss Axiovert 200).plasmid pCalifGT7, which expresses T7 RNA polymerase. Fusion between both populations of cells allows the T7 polymerase to bind its promoter thus activating the synthesis of the luciferase gene. Following addition of the substrate, (D-luciferin), the extent of fusion between target and effector cells can be analyzed. At 24 hours post transfection effector and target cells were either mock treated or treated with 500 mg/ml of SnO2 nanowires during their 1:1 co-culture in a 24-well dish. 24 hours post mixing effector and target cell luciferase gene expression resulting from fusion was measured using a reporter lysis assay (Promega).Mixing of Fluorescent-labeled SnO2 with GFP-tagged HSV-The binding ability of SnO2 nanowires to HSV-1(KOS) K26GFP was determined by mixing fluorescently labeled SnO2 with HSV-1 (KOS) K26GFP. First 500 ml of PBS was added to 0.5 mg of SnO2 and sonicated for solubility. 20 ml of this SnO2 solution was then added to 20 ml of 10 nm Rhodamine phallodin [13] (Invitrogen) and incubated at room temperature for 30 minutes. At the end of incubation the SnO2 particles were washed by centrifuged twice with PBS to remove unbound dye. At the completion of the wash step the fluorescently labeled SnO2 nanowire pellet was resuspended in 400 ml of OptiMEM media. HSV-1 (KOS) K26GFP virus was then added to 200 ml of the labeled SnO2 nanowire solution and placed in a 35 mm glass bottom dish and incubated for 2 hours at 37uC. A second dish with the other 200 ml of labeled SnO2 was used as a control. At the end of incubation the fluorescently labeled SnO2 nanowires and HSVVirus-free Cell-to-cell Fusion AssayA standard virus free cell-to-cell fusion assay was performed as described previously [20,21]. To create the fusion process in vitro CHO-K1 cells were split into two populations: target cells, and effector cells [23?5]. The target cell population was transfected with 1.0 mg of gD receptor (Nectin-1) and 0.5 mg of the plasmid expressing the luciferase gene. The effector cell population was transfected with 0.5 mg each of HSV-1 glycoproteins pPEP98 (gB), pPEP99 (gD), pPEP100 (gH), and pPEP101 (gL), along withTin Oxide Nanowires as Anti-HSV Agents1(KOS) K26GFP (as well as the c.
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