PMID- 30524902 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210112 IS - 2162-4011 (Print) IS - 2162-402X (Electronic) IS - 2162-4011 (Linking) VI - 7 IP - 12 DP - 2018 TI - Dendritic cell-based vaccination: powerful resources of immature dendritic cells against pancreatic adenocarcinoma. PG - e1504727 LID - 10.1080/2162402X.2018.1504727 [doi] LID - e1504727 AB - Pancreatic adenocarcinoma (PAC) has a poor prognosis. One treatment approach, investigated here, is to reinforce antitumor immunity. Dendritic cells (DCs) are essential for the development and regulation of adaptive host immune responses against tumors. A major role for DCs may be as innate tumoricidal effector cells. We explored the efficacy of vaccination with immature (i)DCs, after selecting optimal conditions for generating immunostimulatory iDCs. We used two models, C57BL/6Jrj mice with ectopic tumors induced by the PAC cell line, Panc02, and genetically engineered (KIC) mice developing PAC. Therapeutic iDC-vaccination resulted in a significant reduction in tumor growth in C57BL/6Jrj mice and prolonged survival in KIC mice. Prophylactic iDC-vaccination prevented subcutaneous tumor development. These protective effects were long-lasting in Panc02-induced tumor development, but not in melanoma. iDC-vaccination impacted the immune status of the hosts by greatly increasing the percentage of CD8(+) T-cells, and natural killer (NK)1.1(+) cells, that express granzyme B associated with Lamp-1 and IFN-gamma. Efficacy of iDC-vaccination was CD8(+) T-cell-dependent but NK1.1(+) cell-independent. We demonstrated the ability of DCs to produce peroxynitrites and to kill tumor cells; this killing activity involved peroxynitrites. Altogether, these findings make killer DCs the pivotal actors in the beneficial clinical outcome that accompanies antitumor immune responses. We asked whether efficacy can be improved by combining DC-vaccination with the FOLFIRINOX regimen. Combined treatment significantly increased the lifespan of KIC mice with PAC. Prolonged treatment with FOLFIRINOX clearly augmented this beneficial effect. Combining iDC-vaccination with FOLFIRINOX may therefore represent a promising therapeutic option for patients with PAC. FAU - Collignon, Aurelie AU - Collignon A AUID- ORCID: 0000-0002-0562-5646 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Silvy, Francoise AU - Silvy F AUID- ORCID: 0000-0002-0562-5646 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Robert, Stephane AU - Robert S AUID- ORCID: 0000-0001-9426-0775 AD - Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France. FAU - Trad, Malika AU - Trad M AUID- ORCID: 0000-0001-9085-8518 AD - CHU Dijon-Bocage, Medecine interne et Immunologie Clinique, Dijon, France. FAU - Germain, Sebastien AU - Germain S AUID- ORCID: 0000-0002-8744-9489 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Nigri, Jeremy AU - Nigri J AUID- ORCID: 0000-0003-1439-391X AD - Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Cancer Research Center of Marseille, Marseille, France. FAU - Andre, Frederic AU - Andre F AUID- ORCID: 0000-0002-6298-395X AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Rigot, Veronique AU - Rigot V AUID- ORCID: 0000-0003-1358-1863 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Tomasini, Richard AU - Tomasini R AUID- ORCID: 0000-0003-0869-0811 AD - Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Cancer Research Center of Marseille, Marseille, France. FAU - Bonnotte, Bernard AU - Bonnotte B AUID- ORCID: 0000-0002-1098-4598 AD - CHU Dijon-Bocage, Medecine interne et Immunologie Clinique, Dijon, France. FAU - Lombardo, Dominique AU - Lombardo D AUID- ORCID: 0000-0001-5877-7013 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Mas, Eric AU - Mas E AUID- ORCID: 0000-0002-8925-9195 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. FAU - Beraud, Evelyne AU - Beraud E AUID- ORCID: 0000-0002-1098-4598 AD - Aix Marseille Univ, INSERM, CRO2, Centre de Recherche en Oncologie biologique et Oncopharmacologie, Marseille, France. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180925 PL - United States TA - Oncoimmunology JT - Oncoimmunology JID - 101570526 PMC - PMC6279335 OTO - NOTNLM OT - Active immunotherapy OT - DC-based tumor immunotherapy OT - FOLFIRINOX OT - animal models OT - cancer vaccines OT - pancreatic cancer EDAT- 2018/12/14 06:00 MHDA- 2018/12/14 06:01 PMCR- 2019/09/25 CRDT- 2018/12/08 06:00 PHST- 2018/01/25 00:00 [received] PHST- 2018/07/19 00:00 [revised] PHST- 2018/07/21 00:00 [accepted] PHST- 2018/12/08 06:00 [entrez] PHST- 2018/12/14 06:00 [pubmed] PHST- 2018/12/14 06:01 [medline] PHST- 2019/09/25 00:00 [pmc-release] AID - 1504727 [pii] AID - 10.1080/2162402X.2018.1504727 [doi] PST - epublish SO - Oncoimmunology. 2018 Sep 25;7(12):e1504727. doi: 10.1080/2162402X.2018.1504727. eCollection 2018.