Preventive Anti-CD2 Treatment does not Impair Parasite Control in a Murine Toxoplasmosis Model

Erben, U., Pawlowski, N. N., Heimesaat, M. M., Loddenkemper, C., Doerfel, K., Spieckermann, S., Siegmund, B., Kuhl, A. A. (November 2015) Preventive Anti-CD2 Treatment does not Impair Parasite Control in a Murine Toxoplasmosis Model. Eur J Microbiol Immunol (Bp), 5 (4). pp. 306-15. ISSN 2062-509X (Print)2062-509X (Linking)

URL: http://www.ncbi.nlm.nih.gov/pubmed/26716019
DOI: 10.1556/1886.2015.00040

Abstract

Targeting human CD2 with the monoclonal antibody (mAb) CB.219 reduces intestinal inflammation in a colitis model where T cells carry human CD2. Here, we asked whether this mAb has adverse effects on infection control. Mice expressing human CD2 on T cells (huCD2tg) were orally infected with Toxoplasma (T.) gondii and treated with the human CD2-specific mAb CB.219 in a preventive setting. The intestinal T. gondii loads in CB.219 treated mice did not differ from the control group. Histologically, huCD2tg mice showed moderate ileal inflammation that did not change with CB.219 treatment. In the ileum, CB.219 treatment reduced the protein levels of interferon-gamma, transforming growth factor beta and interleukin-6, whereas interleukin-18 mRNA was slightly increased. The infiltration of neutrophils, macrophages, and T cells into the ileum was unaffected by CB.219 treatment. However, CB.219 treatment decreased the numbers of forkhead box P3(+) regulatory T cells (Treg) in ileum and liver of huCD2tg mice. This was confirmed in vitro using human peripheral blood mononuclear cells. Taken together, targeting CD2(+) T cells by the human CD2 mAb CB.219 does not prevent beneficial immune reactions necessary for pathogen control. Further experiments will address gut specificity, underlying mechanisms, and general applicability of CB.219 treatment.

Item Type: Paper
Uncontrolled Keywords: Cd2 experimental ileitis infection model inflammatory bowel disease
Subjects: diseases & disorders > parasitic diseases
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells
CSHL Authors:
Communities: CSHL labs > Hammell C. lab
Depositing User: Matt Covey
Date: 12 November 2015
Date Deposited: 05 Jan 2016 20:42
Last Modified: 05 Jan 2016 20:42
PMCID: PMC4681358
URI: http://repository.cshl.edu/id/eprint/32208

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