PMID- 29696308 OWN - NLM STAT- MEDLINE DCOM- 20181120 LR - 20201221 IS - 1432-0851 (Electronic) IS - 0340-7004 (Print) IS - 0340-7004 (Linking) VI - 67 IP - 7 DP - 2018 Jul TI - Role of MDA5 and interferon-I in dendritic cells for T cell expansion by anti-tumor peptide vaccines in mice. PG - 1091-1103 LID - 10.1007/s00262-018-2164-6 [doi] AB - Cytotoxic T lymphocytes (CTLs) are effective components of the immune system capable of destroying tumor cells. Generation of CTLs using peptide vaccines is a practical approach to treat cancer. We have previously described a peptide vaccination strategy that generates vast numbers of endogenous tumor-reactive CTLs after two sequential immunizations (prime-boost) using poly-ICLC adjuvant, which stimulates endosomal toll-like receptor 3 (TLR3) and cytoplasmic melanoma differentiation antigen 5 (MDA5). Dendritic cells (DCs) play an important role not only in antigen presentation but are critical in generating costimulatory cytokines that promote CTL expansion. Poly-ICLC was shown to be more effective than poly-IC in generating type-I interferon (IFN-I) in various DC subsets, through its enhanced ability to escape the endosomal compartment and stimulate MDA5. In our system, IFN-I did not directly function as a T cell costimulatory cytokine, but enhanced CTL expansion through the induction of IL15. With palmitoylated peptide vaccines, CD8alpha+ DCs were essential for peptide crosspresentation. For vaccine boosts, non-professional antigen-presenting cells were able to present minimal epitope peptides, but DCs were still required for CTL expansions through the production of IFN-I mediated by poly-ICLC. Overall, these results clarify the roles of DCs, TLR3, MDA5, IFN-I and IL15 in the generation of vast and effective antitumor CTL responses using peptide and poly-IC vaccines. FAU - Sultan, Hussein AU - Sultan H AD - Cancer Immunology, Immunotherapy and Tolerance Program, Georgia Cancer Center, Augusta University, 1410 Laney Walker Blvd., CN-4121, Augusta, GA, 30912, USA. FAU - Wu, Juan AU - Wu J AD - Cancer Immunology, Immunotherapy and Tolerance Program, Georgia Cancer Center, Augusta University, 1410 Laney Walker Blvd., CN-4121, Augusta, GA, 30912, USA. FAU - Kumai, Takumi AU - Kumai T AD - Department of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan. FAU - Salazar, Andres M AU - Salazar AM AD - Oncovir, Inc., Washington, DC, USA. FAU - Celis, Esteban AU - Celis E AUID- ORCID: 0000-0001-8299-4480 AD - Cancer Immunology, Immunotherapy and Tolerance Program, Georgia Cancer Center, Augusta University, 1410 Laney Walker Blvd., CN-4121, Augusta, GA, 30912, USA. ecelis@augusta.edu. LA - eng GR - R01 CA157303/CA/NCI NIH HHS/United States GR - R01CA157303/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20180425 PL - Germany TA - Cancer Immunol Immunother JT - Cancer immunology, immunotherapy : CII JID - 8605732 RN - 0 (Cancer Vaccines) RN - 0 (Interferon Inducers) RN - 0 (Interferon Type I) RN - 0 (TLR3 protein, mouse) RN - 0 (Toll-Like Receptor 3) RN - 0 (Vaccines, Subunit) RN - 25104-18-1 (Polylysine) RN - 7KYP9TKT70 (poly ICLC) RN - EC 3.6.1.- (Ifih1 protein, mouse) RN - EC 3.6.4.13 (Interferon-Induced Helicase, IFIH1) RN - K679OBS311 (Carboxymethylcellulose Sodium) RN - O84C90HH2L (Poly I-C) SB - IM MH - Animals MH - Cancer Vaccines/*administration & dosage MH - Carboxymethylcellulose Sodium/administration & dosage/analogs & derivatives MH - Dendritic Cells/drug effects/*immunology MH - Interferon Inducers/administration & dosage MH - Interferon Type I/*metabolism MH - Interferon-Induced Helicase, IFIH1/*physiology MH - Melanoma, Experimental/immunology/metabolism/pathology/*therapy MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Poly I-C/administration & dosage MH - Polylysine/administration & dosage/analogs & derivatives MH - T-Lymphocytes, Cytotoxic/drug effects/*immunology MH - Toll-Like Receptor 3/physiology MH - Tumor Cells, Cultured MH - Vaccination MH - Vaccines, Subunit/*administration & dosage PMC - PMC6585404 MID - NIHMS1026500 OTO - NOTNLM OT - Dendritic cells OT - Interleukin-15 OT - MDA5 OT - Peptide vaccines OT - Poly-IC OT - Type-I interferon COIS- A. Salazar is President and CEO of Oncovir, Inc. and is developing poly-ICLC (Hiltonol ) for the clinic. Esteban Celis has filed patent applications based on the use of synthetic peptides and poly-IC combinatorial vaccines. The rights of the patent applications have been transferred to the Moffitt Cancer Center (Tampa, FL). Other authors declare no conflict of interest. EDAT- 2018/04/27 06:00 MHDA- 2018/11/21 06:00 PMCR- 2018/04/25 CRDT- 2018/04/27 06:00 PHST- 2017/12/18 00:00 [received] PHST- 2018/04/20 00:00 [accepted] PHST- 2018/04/27 06:00 [pubmed] PHST- 2018/11/21 06:00 [medline] PHST- 2018/04/27 06:00 [entrez] PHST- 2018/04/25 00:00 [pmc-release] AID - 10.1007/s00262-018-2164-6 [pii] AID - 2164 [pii] AID - 10.1007/s00262-018-2164-6 [doi] PST - ppublish SO - Cancer Immunol Immunother. 2018 Jul;67(7):1091-1103. doi: 10.1007/s00262-018-2164-6. Epub 2018 Apr 25.