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© Michaela Muller-Trutwin
HIV
Publication : Journal of immunological methods

Phenotype and function of myeloid dendritic cells derived from African green monkey blood monocytes.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of immunological methods - 20 Jan 2006

Mortara L, Ploquin MJ, Faye A, Scott-Algara D, Vaslin B, Butor C, Hosmalin A, Barré-Sinoussi F, Diop OM, Müller-Trutwin MC,

Link to Pubmed [PMID] – 16325847

J Immunol Methods 2006 Jan; 308(1-2): 138-55

Myeloid dendritic cells probably play an important role in the immune response against HIV and SIV, and in the enhancement of CD4+ T cell infection. Here, we have investigated phenotypic and functional features of myeloid monocyte-derived DC (MDDC) from African green monkeys (AGMs). AGMs are natural hosts of SIV and exhibit no signs of abnormal T cell activation despite high SIV plasma viremia. We identified mAbs that cross-react specifically with homologous molecules expressed on AGM DC. We adapted a protocol to derive AGM MDDC by culture in the presence of GM-CSF and IL-4. The differentiated cells possessed a typical dendritic morphology and the majority were CD11c+ DC-SIGN+. AGM MDDC displayed a high expression of typical maturation markers, such as CD83, CD86 and DC-LAMP, and moderate immunostimulatory capacity, suggesting that the cells were in a semi-mature state. Stimulation resulted in further maturation, as shown by up-regulation of CD80 and decrease of endocytosis ability. However, neither increase of HLA-DR or CD40 expression nor enhanced immunostimulatory capacity was observed. The latter was associated with a low pro-inflammatory cytokine production during mixed lymphocyte reactions and a cytokine balance in favour of IL-10 in contrast to human MDDC. This is the first characterization of AGM MDDC. The tools described here are a crucial step for future studies in vivo or in vitro on the function of myeloid DC using the AGM animal model.