In order to maximize expression of SIV Env, two additional rRRV constructs encoded SIV alone under the control of the p26 promoter. L35Q substitution. This mutation was intended to prevent the immunodominant Mamu-A*01-restricted Tat28-35SL8 epitope from binding to the Mamu-A*01 molecule [22]. C-G) Vectors 3C7 were based on the RRV 26C95 backbone described previously [29]. Three of these constructs contained the SIVnfl insert, albeit under the control of different promoters. Vector 3 contained the CMV enhancer/promoter placed upstream of the SIVnfl insert. In vector 4, a hybrid early/late promoter construct consisting of the late promoter for RRV ORF26 (p26) and the early promoter for the RRV Poly Adenylated Nuclear RNA (PAN) was inserted just upstream of the SIVnfl insert. In vector 5, the SIV promoter/enhancer region was used by restoring nucleotides 1C521 of the 5 LTR. These three promoters were used in combination in an attempt to achieve stable expression of SIVnfl during all stages of the RRV life cycle. In order to maximize expression of SIV Env, two additional rRRV constructs encoded SIV alone under the control of the p26 promoter. Vector 6 encoded SIVmac239 and vector 7 encoded the closely related SIVmac316 inserts was modified to reflect 3-Formyl rifamycin the codon usage of RRV glycoprotein in order to allow adequate expression in monkeys [52]. Both SIVmac239 and SIVmac316 inserts were preceded by the splicing donor sequence (SD, AAACAAGTAAGT) and contained the aforementioned E767Stop truncation. Promoters are indicated by gray boxes. Bovine growth hormone polyadenylation (BGH polyA) signals are indicated by green boxes. The open reading frame in the SIVnfl inserts in vectors 3C5 contained a C-terminal V5 tag, which is indicated by cyan boxes. The SIVmac316 sequences in vectors 2 and 7 are indicated by orange boxes. All other sequences are of SIVmac239 origin. Nucleotide and amino acid numberings are based on the SIVmac239 genome.(PDF) ppat.1008015.s001.pdf (593K) GUID:?3AE0217B-65DD-45C3-AC25-49A7C15AC434 S2 Fig: Kinetics of vaccine-induced CD8+ T-cell responses targeting Mamu-A*01-restricted SIV epitopes. Fluorochrome-labeled Mamu-A*01 tetramers folded with peptides corresponding to SIV epitopes were used to track vaccine-elicited CD8+ T-cells in PBMC from the Group 1a (left column) and Group 2a (right column). 3-Formyl rifamycin The percentages of live tetramer+ CD8+ T-cells specific for Vif100-109VL10 (A), Env620-628TL9 (B), Env233-241CL9 (C), and Tat28-35SL8 (D) are shown at multiple time points throughout the vaccine phase. The time 3-Formyl rifamycin scale in the x-axes matches that in Fig 1.(PDF) ppat.1008015.s002.pdf (425K) GUID:?01A4A116-90E3-4BF6-92F0-7F104DACF8BF S3 Fig: Kinetics of peripheral blood lymphocyte subsets during the rDNA-SIVnfl priming phase. Flow cytometric analysis of PBMC and contemporaneous white blood cell counts were used to determine the absolute numbers of lymphocyte subsets during the rDNA-SIVnfl priming immunizations of the Group 1b (left column) and Group 2b (middle column) monkeys. Based on these numbers, the fold-change from baseline was calculated for each animal and plotted against time. A) Total T-cell counts (live CD14? CD16? CD20? CD3+ lymphocytes). B) CD4+ T-cell counts (live CD14? CD16? CD20? CD3+ CD4+ CD8? lymphocytes). C) CD8+ T-cells (live CD14? CD16? CD20? CD3+ CD4? CD8+ lymphocytes). D) T regulatory cells (Tregs; live CD14? CD16? CD20? CD3+ CD4+ CD8? CD25+ FoxP3+ lymphocytes). E) B-cells (live CD14? CD16? CD20+ lymphocytes). The panels on the right show group means for each lymphocyte subset. The error bars in the right panels correspond to the standard error of the mean and each symbol in the left and middle panels denotes one vaccinee. Differences in the levels of each lymphocyte subset between Groups 1b and 2b were evaluated using mixed-effect median regression, using time and group-by-time interactions as fixed effects, and individual differences as random effects. Time points when statistically significant differences between Groups 1b and 2b were found are indicated by asterisks on the panels on the right.(PDF) ppat.1008015.s003.pdf (623K) GUID:?D4EF9CBF-A1F3-4DBE-86B5-D91087F29BBF S4 Fig: Kinetics of vaccine-induced CD4+ T-cell responses against Gag, Env, and Nef. ICS was used to quantify vaccine-induced CD4+ T-cell responses against Gag (A), Env (B), and Nef (C) in Groups 1b (left column) and 2b (middle column) at multiple time points during the vaccine phase. Group means for these responses are shown in the right column. The error bars in the right panels correspond to the standard error of the mean and each symbol in the left and middle panels denotes one vaccinee. The time scale in Igf1r the x-axes matches that in Fig 1. The percentages of responding CD4+ T cells shown in the y-axes were calculated by adding the background-subtracted frequencies of positive responses producing any combination of IFN-, TNF-, and.