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자료유형
학술저널
저자정보
저널정보
대한면역학회 Immune Network Immune Network Vol.7 No.4
발행연도
2007.12
수록면
186 - 196 (11page)

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초록· 키워드

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Although IL-12 has been widely accepted to playa central role in the control of pathogen infection, the use of recombinant IL-12 (rIL-12) as a vaccine adjuvant has been known to be ineffective because of its rapid clearance in the body. Methods: To investigate the effect of sustained release of IL-12 in vivo in the peptide and protein vaccination models, rIL-12 was encapsulated into poly (A<sub>DL</sub>-lactic-co-glycolic acid) (PLGA). Results: We found that codelivery of IL-12-encapsulated microspheres (IL-12EM) could dramatically increase not only antibody responses, but also antigen-specific CD4<sup>+</sup> and CD8<sup>+</sup> T cell responses. Enhanced immune responses were shown to be correlated with protective immunity against influenza and respiratory syncytial virus (RSV) virus challenge. Interestingly, the enhancement of CD8<sup>+</sup> T cell response was not detectable when CD4<sup>+</sup> T cell knockout mice were subjected to vaccination, indicating that the enhancement of the CD8<sup>+</sup> T cell response by IL-12EM is dependent on CD4<sup>+</sup> T cell "help". Conclusion: Thus, IL-12EM could be applied as an adjuvant of protein and peptide vaccines to enhance protective immunity against virus infection.

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