ith PPM or CP MedChemExpress IPI 145 together with AbISCOH-100, an enhanced IgG response to the fusion protein was detected. In general, higher IgG titers were detected against PPM and CP as compared to the native mIgG Fc fragment 14709329 for which the titers reached 1:4,000. Induction of OVA-specific cytotoxic T-lymphocytes Mannosylated Mycin-IgG Protein as Vaccine Adjuvant stimulated splenocytes represent the effectiveness of an induced CTL response. The CTL activity was studied in individual mice within all groups. In study A, a specific lysis of target cells over 10%, was only detectable in groups of mice injected with compositions including the AbISCOH-100 adjuvant. Interestingly, there was significantly higher specific lysis in the OVA2PPM+AbISCOH-100 group compared to the group that received OVA+AbISCOH-100. At an 80:1 effector:target ratio, 25.1610.5 lysis was detected in mice immunized with OVA+AbISCOH-100 as compared to 46.068.7; p,0.05 lysis in the group receiving OVA linked to the mannosylated fusion protein. At an 8:1 E:T ratio, the difference was even more clear with a specific lysis of 5.963.9 compared to 29.3610.6; p,0.05. In Study B, there was significantly higher specific lysis at E:T ratios of 80:1 and 40:1 in the groups immunized with OVA2PPM+AbISCOH-100 and OVA mixed with PPM+AbISCOH-100 compared to the other groups. Although significantly lower than the OVA2PPM+AbISCOH-100 and OVA mixed with PPM+AbISCOH-100 groups, the OVA2CP+AbISCOH-100 group had a significantly higher CTL response 19770292 at the 80:1 E:T ratio than the other groups. At the 8:1 E:T ratio, the group that received OVA2PPM+AbISCOH-100 had a mean specific lysis of 45622.1; p,0.05, which was significantly higher compared to all groups except the OVA+PPM+AbISCOH-100 group. These results support the antibody results and again show that the mannose structures in the fusion protein play a decisive role for inducing a broad immune response including a strong CTL response. Induction of OVA-specific T-cells producing IFN-c, IL-2, IL4 and IL-5 To further characterize and quantify the type of immune response elicited, we studied the in vitro secretion of IFN-c, IL-2, IL-4 and IL-5. Spleen cells from a pool of splenocytes isolated from four to five immunized mice were stimulated for 36 hours with various antigens and the number of cells producing a particular cytokine was assessed by the ELISpot assay. In study A, IFN-c producing cells were mainly seen in groups of mice immunized with compositions containing AbISCOH-100. In the OVA+AbISCOH-100 group, IFN-c producing cells were detected after stimulation with the MHC class I restricted SIINFEKL peptide with up to 500 spotforming colonies /106 cells. The corresponding value in the group 
of mice receiving the OVA2PPM+AbISCOH-100 was over 2,500 SFC/106cells even when using 100 times lower concentration of the peptide. In the OVA2PPM+AbISCOH100 group, not only IFN-c producing CTLs but also Th-cells responded and secreted IFN-c when stimulated with an OVA-Th peptide or the intact OVA protein. Although it seems that AbISCOH-100 is needed for the mice to mount a cellular immune response including induction of IFN-c producing cells, the response is clearly higher when OVA is combined with the mannosylated PSGL-1/mIgG2b than when it is used alone. Negative controls did not induce any production of IFN-c and the positive control showed similar responses between groups. In study B, the IFN-c response was shown to be highest in the group of mice immunized with OV
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