Figure 4.

A three-dose regime overcomes an “all-or-none” pattern for humoral immune responses. Mice were immunized intramuscularly (IM) thrice at a three-week interval with 10µg of University of Pennsylvania (UPenn) N-glycosylation site modified (GM) and encapsulated in LNP1 (UPenn GM LNP1), or without N-glycosylation modification (UPenn LNP1) that were one-methylpseudouridine (m1Ψ)-5′-triphosphate modified, and cellulose affinity purified or with TriLink pfceltos mRNA with N-glycosylation site modified (GM) in LNP1 (TriLink GM LNP1) or LNP3 (TriLink GM LNP3) that were ψ-pseudouridine and 5-methylcytosine modified (n = 15 per group; n = 10 in LNP alone groups). (A) Kinetics of PfCelTOS antibody concentrations measured by ELISA. Antibody concentrations are reported as the geometric mean and 95% confidence intervals. (B) IFN-γ cytokine responses were detected by ELISpot, (n=5 per group). The mean number of spot-forming cells (SFC) per splenocytes were reported with standard errors of the mean (SEM). Statistical analysis was performed using Mann-Whitney test, (*p<0.05, **p<0.01).