PMID- 27213692 OWN - NLM STAT- MEDLINE DCOM- 20170710 LR - 20181113 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 11 IP - 5 DP - 2016 TI - Transcriptional Analysis of PRRSV-Infected Porcine Dendritic Cell Response to Streptococcus suis Infection Reveals Up-Regulation of Inflammatory-Related Genes Expression. PG - e0156019 LID - 10.1371/journal.pone.0156019 [doi] LID - e0156019 AB - The porcine reproductive and respiratory syndrome virus (PRRSV) is one of the most important swine pathogens and often serves as an entry door for other viral or bacterial pathogens, of which Streptococcus suis is one of the most common. Pre-infection with PRRSV leads to exacerbated disease caused by S. suis infection. Very few studies have assessed the immunological mechanisms underlying this higher susceptibility. Since antigen presenting cells play a major role in the initiation of the immune response, the in vitro transcriptional response of bone marrow-derived dendritic cells (BMDCs) and monocytes in the context of PRRSV and S. suis co-infection was investigated. BMDCs were found to be more permissive than monocytes to PRRSV infection; S. suis phagocytosis by PRRSV-infected BMDCs was found to be impaired, whereas no effect was found on bacterial intracellular survival. Transcription profile analysis, with a major focus on inflammatory genes, following S. suis infection, with and without pre-infection with PRRSV, was then performed. While PRRSV pre-infection had little effect on monocytes response to S. suis infection, a significant expression of several pro-inflammatory molecules was observed in BMDCs pre-infected with PRRSV after a subsequent infection with S. suis. While an additive effect could be observed for CCL4, CCL14, CCL20, and IL-15, a distinct synergistic up-regulatory effect was observed for IL-6, CCL5 and TNF-alpha after co-infection. This increased pro-inflammatory response by DCs could participate in the exacerbation of the disease observed during PRRSV and S. suis co-infection. FAU - Auray, Gael AU - Auray G AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. FAU - Lachance, Claude AU - Lachance C AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. FAU - Wang, Yingchao AU - Wang Y AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. FAU - Gagnon, Carl A AU - Gagnon CA AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. FAU - Segura, Mariela AU - Segura M AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. FAU - Gottschalk, Marcelo AU - Gottschalk M AD - Groupe de recherche sur les maladies infectieuses en production animale (GREMIP), Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 2M2. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160523 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Inflammation Mediators) SB - IM MH - Animals MH - Cells, Cultured MH - Coinfection/*genetics/immunology MH - Dendritic Cells/*metabolism MH - Disease Susceptibility/immunology MH - Host-Pathogen Interactions/genetics/immunology MH - Immunity, Cellular/genetics MH - Inflammation/*genetics/microbiology/virology MH - Inflammation Mediators/metabolism MH - Porcine Reproductive and Respiratory Syndrome/*genetics/immunology MH - Porcine respiratory and reproductive syndrome virus/pathogenicity MH - Streptococcal Infections/*genetics/immunology MH - Streptococcus suis/pathogenicity MH - Swine/*genetics/immunology/microbiology/virology MH - Swine Diseases/*genetics/immunology/microbiology/virology MH - Up-Regulation/genetics PMC - PMC4877111 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2016/05/24 06:00 MHDA- 2017/07/14 06:00 PMCR- 2016/05/23 CRDT- 2016/05/24 06:00 PHST- 2016/01/04 00:00 [received] PHST- 2016/05/09 00:00 [accepted] PHST- 2016/05/24 06:00 [entrez] PHST- 2016/05/24 06:00 [pubmed] PHST- 2017/07/14 06:00 [medline] PHST- 2016/05/23 00:00 [pmc-release] AID - PONE-D-16-00169 [pii] AID - 10.1371/journal.pone.0156019 [doi] PST - epublish SO - PLoS One. 2016 May 23;11(5):e0156019. doi: 10.1371/journal.pone.0156019. eCollection 2016.