NDLI: Functional and Phenotypic Characteristics of Alternative Activation Induced in Human Monocytes by Interleukin-4 or the Parasitic Nematode Brugia malayi ▿ †

Content Provider	PubMed Central
Author	Semnani, Roshanak Tolouei Mahapatra, Lily Moore, Vanessa Sanprasert, Vivornpun Nutman, Thomas B.
Editor	Urban, J. F.
Copyright Year	2011
Abstract	Human monocytes from patients with patent filarial infections are studded with filarial antigen and express markers associated with alternative activation of macrophages (MΦ). To explore the role of filaria-derived parasite antigen in differentiation of human monocytes, cells were exposed to microfilariae (mf) of Brugia malayi, and their phenotypic and functional characteristics were compared with those of monocytes exposed to factors known to generate either alternatively (interleukin-4 [IL-4]) or classically (macrophage colony-stimulating factor [MCSF]) activated MΦ. IL-4 upregulated mRNA expression of CCL13, CCL15, CCL17, CCL18, CCL22, CLEC10A, MRC1, CADH1, CD274, and CD273 associated with alternative activation of MΦ but not arginase 1. IL-4-cultured monocytes had a diminished ability to promote proliferation of both CD4+ and CD8+ T cells compared to that of unexposed monocytes. Similar to results with IL-4, exposure of monocytes to live mf induced upregulation of CCL15, CCL17, CCL18, CCL22, CD274, and CD273 and downregulation of Toll-like receptor 3 (TLR3), TLR5, and TLR7. In contrast to results with MCSF-cultured monocytes, exposure of monocytes to mf resulted in significant inhibition of the phagocytic ability of these cells to the same degree as that seen with IL-4. Our data suggest that short exposure of human monocytes to IL-4 induces a phenotypic characteristic of alternative activation and that secreted filarial products skew monocytes similarly.
Related Links	http://dx.doi.org/10.1128/iai.05191-11
Ending Page	3965
Page Count	9
Starting Page	3957
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	10
Volume Number	79
Language	English
Publisher	American Society for Microbiology
Publisher Date	2011-10-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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