title: Effect of SIVmac infection on plasmacytoid and CD1c+ myeloid dendritic cells in cynomolgus macaques.
abstract: Dendritic cells (DCs) are known to be essential for the induction and regulation of immune responses. Non-human primates are essential in biomedical research and contribute to our understanding of the involvement of DCs in human infectious diseases. However, no direct single-platform method for quantifying DC precursors has yet been optimized in macaques to give accurate absolute blood counts of these rare-event cell populations in the blood. We adapted a rapid whole-blood assay for the absolute quantification of DCs in cynomolgus macaques by four-colour flow cytometry, using a single-platform assay compatible with human blood. Cynomolgus macaque plasmacytoid DCs (pDCs) and CD1c(+) myeloid DCs (CD1c(+) mDCs) were quantified in the blood of 34 healthy macaques and the results obtained were compared with those for blood samples from 11 healthy humans. In addition, circulating absolute numbers of pDCs were quantified in cynomolgus macaques chronically infected with SIVmac. During infection, pDC counts decreased whereas circulating CD1c(+) mDC counts increased. Information regarding absolute pDC and mDC counts in non-human primates may improve our understanding of the role of these cells in SIV/HIV infection and in other infectious diseases.
authors.affiliation: CEA, Service d'Immuno-Virologie, DSV/iMETI, IPSC, Fontenay-aux-Roses, France.
authors.forename: Benoît
authors.initials: B
authors.lastname: Malleret
authors.forename: Ingrid
authors.initials: I
authors.lastname: Karlsson
authors.forename: Benjamin
authors.initials: B
authors.lastname: Manéglier
authors.forename: Patricia
authors.initials: P
authors.lastname: Brochard
authors.forename: Benoît
authors.initials: B
authors.lastname: Delache
authors.forename: Thibault
authors.initials: T
authors.lastname: Andrieu
authors.forename: Michaela
authors.initials: M
authors.lastname: Muller-Trutwin
authors.forename: Tim
authors.initials: T
authors.lastname: Beaumont
authors.forename: Joseph M
authors.initials: JM
authors.lastname: McCune
authors.forename: Jacques
authors.initials: J
authors.lastname: Banchereau
authors.forename: Roger
authors.initials: R
authors.lastname: Le Grand
authors.forename: Bruno
authors.initials: B
authors.lastname: Vaslin
mesh_terms: D000328:Adult; D000818:Animals; D018949:Antigens, CD1 / Q000097:blood*; D002452:Cell Count; D002908:Chronic Disease; D003713:Dendritic Cells / Q000276:immunology*; D005434:Flow Cytometry; D006801:Humans; D016130:Immunophenotyping; D008198:Lymph Nodes / Q000276:immunology; D008252:Macaca fascicularis; D008297:Male; D023461:Myeloid Progenitor Cells / Q000276:immunology*; D016097:Simian Acquired Immunodeficiency Syndrome / Q000276:immunology*; D015302:Simian Immunodeficiency Virus
chemical_list: D018949:Antigens, CD1