mixture of PBS:ImjectH Alum; and 7) 140 mg PPM in PBS. All material used for the immunizations had an endotoxin level below 1 EU/dose. In study B, 810 mice/group were immunized as described above using a dose of 35 mg OVA either free or conjugated 1:1 with mannosylated Clemizole hydrochloride PSGL-1/mIgG2b produced in P. pastoris or with PSGL-1/mIgG2b carrying mono and disialylated core 1 structures produced in CHO cells. The antigen and antigen conjugate were either given alone or in combination with AbISCOH-100. The same immunization scheme as described above was used. The following groups of mice were included in study B: 1) 35 mg/89 mg OVA2PPM; 2) 35 mg/89 mg OVA2CP; 3) 35 mg OVA+12 mg AbISCOH-100; 4) 35 mg OVA+89 mg PPM+12 mg AbISCOH-100; 5) 89 mg PPM+12 mg AbISCOH-100; and 6) PBS. All groups had an endotoxin level below 1 EU/dose except the groups immunized with OVA2PPM that had 3.87.6 EU/dose and OVA2CP had 4.89.6 EU/dose. Detection of total IgG and IgG subclasses IgG1, IgG2a, IgG2b, IgG3 specific for OVA Mouse sera analyzed with regard to antibody levels and isotypes were collected before the first immunization and then 2 weeks after each immunization by retro-orbital bleeding of isofluorane-anesthetized mice. To free the sera of cells, the samples were centrifuged twice at 6,0006 g. OVA-specific mouse immunoglobulins were quantified by ELISA. ELISA plates were coated using a 10 mg/mL Mannosylated Mycin-IgG Protein as Vaccine Adjuvant OVA solution, which was incubated in the 10336422 plates o/n at +4uC. After every incubation step the plates were washed 4 times with 400 mL of wash solution. Plates were blocked with 1% BSA in PBS for 1 hour at 37uC. Serial dilutions of sera 17876302 in 1% BSA/PBS were analyzed in duplicates or triplicates and incubated for 1 hour at 37uC. Anti-mouse IgG, IgG1, IgG2a, IgG2b or IgG3 -HRP conjugates diluted 1:2,000 8,000 and incubated for 1 hour at 37uC was used for detection of the different IgG subclasses. The TMB substrate was dissolved in 10 mL phosphate citrate buffer, pH 5.0 containing 3 mL 30% H2O2 per 10 mL buffer and was used for detection of HRP conjugates. The reaction was stopped after 35 minutes with 2 M H2SO4. Optical density was measured in a TECAN Sunrise spectrophotometer at 450 nm within 2 hours after addition of H2SO4. An antibody titer was considered positive if the OD value was three times that of the animal serum collected prior to the first immunization. A hyperimmune serum of known titer was used as positive control. Pooled serum from nonimmunized wt C57Bl/6J mice was used as negative control. Detection of mouse IgG ELISA plates were coated using a 2 mg/mL PPM, CP or mIgG Fc fragment o/n at 
+4uC. After every incubation step the plates were washed 4 times with 400 mL of wash solution. Plates were blocked with 1% BSA in PBS for 1 hour at RT. Serial dilutions of pooled sera in 1% BSA/PBS were analyzed in duplicates and incubated for 2 hour at RT. An anti-mouse IgG Fab specific HRP antibody diluted 1:5,000 and incubated for 2 hours at RT was used for detection. HRP conjugate was detected exactly as described in section 2.7. An antibody titer was considered positive if the OD value was three times that of the animal serum collected from the control group of mice only receiving PBS at each immunization. stimulated in vitro by co-cultivation in 25 mL-flasks containing 12 mL complete RPMI-1640 medium with 10% FBS, 100 U/mL penicillin and 100 mg/mL streptomycin, 10 mM HEPES, 2 mM L-glutamine, 1 mM nonessential amino acids, 1
