PMID- 31130951 OWN - NLM STAT- MEDLINE DCOM- 20201019 LR - 20201019 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 10 DP - 2019 TI - Macrophage-B Cell Interactions in the Inverted Porcine Lymph Node and Their Response to Porcine Reproductive and Respiratory Syndrome Virus. PG - 953 LID - 10.3389/fimmu.2019.00953 [doi] LID - 953 AB - Swine lymph nodes (LN) present an inverted structure compared to mouse and human, with the afferent lymph diffusing from the center to the periphery. This structure, also observed in close and distant species such as dolphins, hippopotamus, rhinoceros, and elephants, is poorly described, nor are the LN macrophage populations and their relationship with B cell follicles. B cell maturation occurs mainly in LN B cell follicles with the help of LN macrophage populations endowed with different antigen delivery capacities. We identified three macrophage populations that we localized in the inverted LN spatial organization. This allowed us to ascribe porcine LN MPhi to their murine counterparts: subcapsular sinus MPhi, medullary cord MPhi and medullary sinus MPhi. We identified the different intra and extrafollicular stages of LN B cells maturation and explored the interaction of MPhi, drained antigen and follicular B cells. The porcine reproductive and respiratory syndrome virus (PRRSV) is a major porcine pathogen that infects tissue macrophages (MPhi). PRRSV is persistent in the secondary lymphoid tissues and induces a delay in neutralizing antibodies appearance. We observed PRRSV interaction with two LN MPhi populations, of which one interacts closely with centroblasts. We observed BCL6 up-regulation in centroblast upon PRRSV infection, leading to new hypothesis on PRRSV inhibition of B cell maturation. This seminal study of porcine LN will permit fruitful comparison with murine and human LN for a better understanding of normal and inverted LN development and functioning. FAU - Bordet, Elise AU - Bordet E AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. FAU - Fretaud, Maxence AU - Fretaud M AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. AD - INRA, EMERG'IN- Plateforme d'Infectiologie Experimentale IERP- Domaine de Vilvert, Jouy-en-Josas, France. FAU - Crisci, Elisa AU - Crisci E AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. AD - UMR Genetique Animale et Biologie Integrative, INRA, AgroParisTech, Universite Paris-Saclay, Jouy-en-Josas, France. AD - Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States. FAU - Bouguyon, Edwige AU - Bouguyon E AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. FAU - Rault, Stephane AU - Rault S AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. FAU - Pezant, Jeremy AU - Pezant J AD - INRA, UE1277, Plate-Forme d'Infectiologie Experimentale, PFIE, Nouzilly, France. FAU - Pleau, Alexis AU - Pleau A AD - INRA, UE1277, Plate-Forme d'Infectiologie Experimentale, PFIE, Nouzilly, France. FAU - Renson, Patricia AU - Renson P AD - Anses, Laboratoire de Ploufragan-Plouzane-Niort, Unite Virologie et Immunologie Porcines, Zoopole, BP53, Ploufragan, France. AD - Universite Bretagne Loire, Cite Internationale, Rennes, France. FAU - Giuffra, Elisabetta AU - Giuffra E AD - UMR Genetique Animale et Biologie Integrative, INRA, AgroParisTech, Universite Paris-Saclay, Jouy-en-Josas, France. FAU - Larcher, Thibaut AU - Larcher T AD - INRA, UMR 703 APEX, Oniris, Nantes, France. FAU - Bourge, Mickael AU - Bourge M AD - I2BC, Centre National de la Recherche Scientifique, Gif-sur-Yvette, France. FAU - Bourry, Olivier AU - Bourry O AD - Anses, Laboratoire de Ploufragan-Plouzane-Niort, Unite Virologie et Immunologie Porcines, Zoopole, BP53, Ploufragan, France. AD - Universite Bretagne Loire, Cite Internationale, Rennes, France. FAU - Boulesteix, Olivier AU - Boulesteix O AD - INRA, UE1277, Plate-Forme d'Infectiologie Experimentale, PFIE, Nouzilly, France. FAU - Langevin, Christelle AU - Langevin C AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. AD - INRA, EMERG'IN- Plateforme d'Infectiologie Experimentale IERP- Domaine de Vilvert, Jouy-en-Josas, France. FAU - Schwartz-Cornil, Isabelle AU - Schwartz-Cornil I AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. FAU - Bertho, Nicolas AU - Bertho N AD - VIM-INRA-Universite Paris-Saclay, Domaine de Vilvert, Jouy-en-Josas, France. AD - BIOEPAR, INRA, Oniris, Nantes, France. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190503 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 SB - IM MH - Animals MH - B-Lymphocytes/*immunology MH - Lymph Nodes/*immunology MH - Macrophages/*immunology MH - Porcine Reproductive and Respiratory Syndrome/*immunology MH - Porcine respiratory and reproductive syndrome virus MH - Swine PMC - PMC6510060 OTO - NOTNLM OT - B cell OT - BCL6 OT - PRRSV OT - centrocyte OT - lymph node OT - macrophage OT - swine EDAT- 2019/05/28 06:00 MHDA- 2020/10/21 06:00 PMCR- 2019/01/01 CRDT- 2019/05/28 06:00 PHST- 2019/01/15 00:00 [received] PHST- 2019/04/12 00:00 [accepted] PHST- 2019/05/28 06:00 [entrez] PHST- 2019/05/28 06:00 [pubmed] PHST- 2020/10/21 06:00 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2019.00953 [doi] PST - epublish SO - Front Immunol. 2019 May 3;10:953. doi: 10.3389/fimmu.2019.00953. eCollection 2019.