IgG-Complexed Adenoviruses Induce Human Plasmacytoid Dendritic Cell Activation and Apoptosis |
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Authors: | Thi Thu Phuong Tran Tuan Hiep Tran Eric J. Kremer |
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Affiliation: | 1.Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 34090 Montpellier, France; (T.T.P.T.); (T.H.T.);2.Department of Life Sciences, University of Science and Technology of Hanoi Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam;3.Faculty of Pharmacy, PHENIKAA University, Hanoi 12116, Vietnam;4.PHENIKAA Research and Technology Institute (PRATI), A&A Green Phoenix Group JSC, Hanoi 11313, Vietnam |
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Abstract: | Following repeat exposure to many human adenoviruses (HAdVs), most adults harbour long-lived B- and T-cell responses. Combined, this response typically protects us for years from re-infection by the same HAdV type. In spite of these immune responses, some HAdV types are associated with persistent infections that constitute a life-threatening risk when an individual’s T-cell response is compromised. By contrast, patients with B-cell deficiencies do not appear to be at a greater risk of HAdV disease. This dichotomy begs the question of the secondary role of anti-HAdV antibodies during host defence. In this study, we explored IgG-complexed (IC)-HAdV5 and primary human plasmacytoid dendritic cell (pDC) interactions. We found that IC-HAdV5 are efficiently internalized in pDCs, stimulate their activation through TLR9 signalling, and cause apoptosis. These data may help reconcile the enigma of robust immune response to HAdVs, while concurrently allowing persistence. |
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Keywords: | adenovirus antibodies immune complexes plasmacytoid dendritic cells innate immunity |
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