Signatures of innate immunity and plasmablasts correlated with and predicted influenza antibody titers at 1 month after vaccination with >80% accuracy across multiple seasons but were not associated with the longevity of the response.
The brain's ability to adapt in due course to repeated insults can be characterized by the longevity of the response, even after the perturbation has halted.
To evaluate the longevity of the response to intranasal VLP vaccine, prime-boost immunized mice kept in isolation were bled after 7 months to determine the duration of H5N1 virus specific antibody levels and to compare with titers at 2 weeks after boosting.
However the longevity of this response may be limited, as a previous study of docetaxel-treated tumours identified persistent PCa several months after treatment [ 36].
Additionally the longevity of antibody response generates a seroprevalence that is higher than equivalent parasite rates, making it a more sensitive measure.
These eight subjects also had mild wrinkles at baseline and very thin corrugator muscles; it is possible that these factors contributed to the longevity of the response in these subjects.
Cell-mediated immunity, cross-reacting immune responses to other high risk HPV types, and longevity of immune responses were not evaluated.
While the longevity of antibody responses is similar for sexual and asexual stages, our data nevertheless indicate clear differences in the kinetics of the two responses, consistent with differences in the timing of antigen exposure.
Longevity of antibody responses was investigated by plotting the mean Day 0 to Day 236 anti-AMA1-3D7 anti-AMA1-FVO-FVO responses derived from individual sera for 80 µg AMA1, 20 µg AMA1+CPG and 80 µg AMA1+CPG groups (Figure 3).
Studies with much longer follow-up periods are needed to determine the longevity of antibody responses from long-lived plasma cells which may sustain low (but detectable) titres of antibodies for much longer periods.
The longevity of antibody responses to MSP-119 and AMA-1 was estimated in a similar manner, using the change in antibody concentration between day 7 and day 84 in relation to time since the last documented exposure to asexual parasites (day 0).
