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Journal of Virology, December 2005, p. 14526-14535, Vol. 79, No. 23
0022-538X/05/$08.00+0     doi:10.1128/JVI.79.23.14526-14535.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Interaction of Rotavirus with Human Myeloid Dendritic Cells

Carlos F. Narváez, Juana Angel, and Manuel A. Franco*

Instituto de Genética Humana, Pontificia Universidad Javeriana, Bogotá, Colombia

Received 26 December 2004/ Accepted 7 September 2005

We have previously shown that very few rotavirus (RV)-specific T cells that secrete gamma interferon circulate in recently infected and seropositive adults and children. Here, we have studied the interaction of RV with myeloid immature (IDC) and mature dendritic cells (MDC) in vitro. RV did not induce cell death of IDC or MDC and induced maturation of between 12 and 48% of IDC. Nonetheless, RV did not inhibit the maturation of IDC or change the expression of maturation markers on MDC. After treatment with RV, few IDC expressed the nonstructural viral protein NSP4. In contrast, a discrete productive viral infection was shown in MDC of a subset of volunteers, and between 3 and 46% of these cells expressed NSP4. RV-treated IDC secreted interleukin 6 (IL-6) (but not IL-1ß, IL-8, IL-10, IL-12, tumor necrosis factor alpha, or transforming growth factor beta), and MDC released IL-6 and small amounts of IL-10 and IL-12p70. The patterns of cytokines secreted by T cells stimulated by staphylococcal enterotoxin B presented by MDC infected with RV or uninfected were comparable. The frequencies and patterns of cytokines secreted by memory RV-specific T cells evidenced after stimulation of peripheral blood mononuclear cells (PBMC) with RV were similar to those evidenced after stimulation of PBMC with RV-infected MDC. Finally, IDC treated with RV strongly stimulated naive allogeneic CD4+ T cells to secrete Th1 cytokines. Thus, although RV does not seem to be a strong maturing stimulus for DC, it promotes their capacity to prime Th1 cells.

* Corresponding author. Mailing address: Instituto de Genética Humana, Pontificia Universidad Javeriana, Carrera 7 40-62, Bogotá, Colombia. Phone: 57-1-3208320, ext. 2790. Fax: 57-1-2850356. E-mail: mafranco{at}javeriana.edu.co.

Journal of Virology, December 2005, p. 14526-14535, Vol. 79, No. 23
0022-538X/05/$08.00+0     doi:10.1128/JVI.79.23.14526-14535.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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