Poly(I:C) enhanced anti-cervical cancer immunities induced by dendritic cells-derived exosomes

PMID: 29427678
Journal: International journal of biological macromolecules (volume: 113, issue: , Int. J. Biol. Macromol. 2018 Jul;113:1182-1187)
Published: 2018-02-08

Chen S, Lv M, Fang S, Ye W, Gao Y, Xu Y


Dendritic cell (DC)-derived exosomes (Dexo) has been confirmed to be able to induce the specific anti-tumor immune response ex vivo and in vivo. Here, the aim of this study was to evaluate the application of the antigen-pulsed Dexo as a new vaccination platform in immunotherapy for cervical cancer. The immunogenic profile of the different Dexo was assessed by the cell proliferation, cytokines secretion and effector functions of CD8 T cells and the splenocytes from Dexo-vaccinated mice. Furthermore, the anti-tumor immunity elicited by Dexo was further compared in cervical cancer-bearing mice. Dexo from DCs loaded with E7 peptide could efficiently induce the cytotoxic activity of CD8 T cells on TC-1 tumor cells ex vivo, the proliferation and IFN-γ excretion of CD8 T cells. Moreover, Dexo vaccine promoted the immune responses of vaccinated mice splenocytes induced by antigen E7 in vitro restimulation. Of note, poly(I:C) was significantly more potent inducer of the antigen-loaded Dexo mediated protective immunity responses for cervical cancer and further evidenced by that Dexo(E7+pIC) markedly inhibited the tumor growth and improved the survival rate of the tumor-bearing mice. We provided evidence that poly(I:C) dramatically increased the potent antitumoral immunity induced by antigen-pulsed Dexo for ameliorating cervical cancer.