Comparative proteomics analysis to annexin B1 DNA and protein vaccination in mice.

DNA vaccines have been widely reported to elicit both effective humoral and cellular immune responses, but the mechanisms of antigen processing and presentation in DNA immunization is still ambiguous. Aiming to molecular mechanisms involved in DNA immunization, comparative serum proteomics was introduced to discover differentially expressed proteins after different immunizations. Using two-dimensional electrophoresis and matrix-assisted laser desorption ionisation-time-of-flight mass spectrometry, 23 three-fold or greater up-regulated proteins were separated and identified, including 14 from ANXB1 DNA immunized mice and 9 from annexin B1 protein immunized mice. The histocompatibility class I molecule H2-Q10 (HA10_MOUSE) and proteasome activator PA28 alpha-subunit (PSME1_MOUSE) were found up-regulated in ANXB1 DNA immunized mice, which may contribute to the augmented activation of T lymphocytes. These proteins may serve as potential surrogate markers of successful vaccination and provide research targets for molecular mechanisms of vaccinology.