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자료유형
학술저널
저자정보
Sang-Hyun Kim (Chungbuk National University) Ji-Hyun Park (Chungbuk National University) Sun-Jae Lee (Chungbuk National University) Hee-Sung Lee (Chungbuk National University) Jae-Kyung Jung (Chungbuk National University) Young-Ran Lee (Korea Institute of Ceramic Engineering and Technology) Hyun-Il Cho (ViGenCell) Jeong-Ki Kim (Korea University College of Pharmacy) Kyungjae Kim (Sahmyook University) Chan-Su Park (Chungbuk National University) Chong-Kil Lee (Chungbuk National University)
저널정보
대한면역학회 Immune Network Immune Network Vol.22 No.5
발행연도
2022.10
수록면
99 - 118 (20page)

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Vaccination with tumor peptide epitopes associated with MHC class I molecules is an attractive approach directed at inducing tumor-specific CTLs. However, challenges remain in improving the therapeutic efficacy of peptide epitope vaccines, including the’ low immunogenicity of peptide epitopes and insufficient stimulation of innate immune components in vivo. To overcome this, we aimed to develop and test an innovative strategy that elicits potent CTL responses against tumor epitopes. The essential feature of this strategy is vaccination using tumor epitope-loaded nanoparticles (NPs) in combination with polyinosinic-polycytidylic acid (poly-IC) and anti-PD1 mAb. Carboxylated NPs were prepared using poly(lactic-co-glycolic acid) and poly(ethylene/maleic anhydride), covalently conjugated with anti-H-2K<SUP>b</SUP> mAbs, and then attached to H-2K<SUP>b</SUP> molecules isolated from the tumor mass (H-2<SUP>b</SUP>). Native peptides associated with the H-2K<SUP>b</SUP> molecules of H-2K<SUP>b</SUP>-attached NPs were exchanged with tumor peptide epitopes. Tumor peptide epitope-loaded NPs efficiently induced tumor-specific CTLs when used to immunize tumor-bearing mice as well as normal mice. This activity of the NPs significantly was increased when co-administered with poly-IC. Accordingly, the NPs exerted significant anti-tumor effects in mice implanted with EG7-OVA thymoma or B16-F10 melanoma, and the anti-tumor activity of the NPs was significantly increased when applied in combination with poly-IC. The most potent anti-tumor activity was observed when the NPs were co-administered with both poly-IC and anti-PD1 mAb. Immunization with tumor epitope-loaded NPs in combination with poly-IC and anti-PD1 mAb in tumor-bearing mice can be a powerful means to induce tumor-specific CTLs with therapeutic anti-tumor activity.

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ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
REFERENCES

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