Differences in the constitutive and SIV infection induced expression of Siglecs by hematopoietic cells from non-human primates

• Published in: Cellular immunology 2007-11, Vol.250 (1), p.91-104
• Main Authors: Jaroenpool, Jiraporn, Rogers, Kenneth A., Pattanapanyasat, Kovit, Villinger, Francois, Onlamoon, Nattawat, Crocker, Paul R., Ansari, Aftab A.
• Format: Article
• Language: English
• Subjects: Amino Acid Sequence; Animals; Antigens, CD - genetics; Antigens, CD - metabolism; Antigens, Differentiation, Myelomonocytic - genetics; Antigens, Differentiation, Myelomonocytic - metabolism; Cell Lineage; Cercocebus atys; Flow Cytometry; Gene Expression Regulation; Hematopoietic cell lineages; Hematopoietic Stem Cells - metabolism; Humans; Lectins - genetics; Lectins - metabolism; Macaca mulatta; Molecular Sequence Data; Monocytes; Monocytes - metabolism; Non-human primate; Primates; Reverse Transcriptase Polymerase Chain Reaction; RNA, Messenger - metabolism; Sequence Alignment; Sialic Acid Binding Immunoglobulin-like Lectins; Siglec; Simian Acquired Immunodeficiency Syndrome - blood; Simian Acquired Immunodeficiency Syndrome - metabolism; Simian Immunodeficiency Virus; SIV infection; Species Specificity; Viral Load
• ISSN: 0008-8749; 1090-2163
• DOI: 10.1016/j.cellimm.2008.01.009

The expression of the Siglec family of molecules by hematopoietic cells from uninfected and SIV infected disease susceptible rhesus macaques (RM) and SIV infected disease resistant sooty mangabeys (SM) and for comparison humans was carried out. The predominant cell lineage in all three species expressing Siglec’s was monocytes. The major finding by both a cross sectional and a prospective SIV infection study showed that, whereas monocytes from RM show marked increase in each Siglec constitutively expressed, monocytes from SM showed marked decreases in Siglec-1 expression. While monocytes from all three species constitutively expressed Siglec-3, human monocytes in addition expressed Siglec-5 and -9 and to a lower density 7, monocytes from RM expressed Siglec-7 and those from SM expressed Siglec-1. Monocytes from all three species, however, expressed mRNA for Siglec-1, -5, -7 and -9. The reasons for the failure to detect these molecules at the protein level and the mechanisms for such distinct effects of SIV infection on Siglec expression are discussed.