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- W2048594021 abstract "<h3>Abstract</h3> Innate lymphoid cells (ILCs), the complements of diverse CD4 T helper cells, help maintain tissue homeostasis by providing a link between innate and adaptive immune responses. While pioneering studies over the last decade have advanced our understanding how ILCs influence adaptive immune responses to pathogens, far less is known about whether the adaptive immune response feeds back into an ILC response. In this study, we isolated ILCs from blood of healthy donors, fine-tuned culture conditions, and then directly challenged them with human adenoviruses (HAdVs), with HAdVs and host defence proteins (HDPs) or neutralizing antibodies (NAbs), to mimic interactions in a host with pre-existing immunity. Additionally, we developed an <i>ex vivo</i> approach to identify how bystander ILCs respond to the uptake of HAdVs ± neutralizing antibodies by monocyte-derived dendritic cells. We show that ILCs take up HAdVs, which induces phenotypic maturation and cytokine secretion. Moreover, NAbs and HDPs complexes modified the cytokine profile generated by ILCs, consistent with a feedback loop for host antiviral responses and potential to impact adenovirus-based vaccine efficacy. <h3>Author Summary</h3> Several studies have shown the importance of innate lymphoid cells (ILCs) both from an immune and physiological point of view, in particular for their role in the maintenance of tissue integrity, pathogens clearance, or in the establishment of immune tolerance. Our study focuses on the role of ILCs during direct challenge with prototype vaccines based on human adenoviruses (HAdVs) ± host defence proteins (HDPs) or neutralizing antibodies (NAbs) to mimic interactions in a host with pre-existing immunity. In parallel, through an ex vivo approach we observe how bystander ILCs respond to the uptake of HAdVs ± NAbs by monocyte-derived dendritic cells. We show that ILCs take up HAdVs, which induces pro- inflammatory and antiviral responses through phenotypic maturation and cytokine secretion. Moreover, HAdV-NAb and HAdV-HDP complexes modified the cytokine profile generated by ILCs, consistent with a feedback loop for host antiviral responses and potential to impact HAdV vaccine efficacy." @default.
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- W2048594021 date "1982-02-01" @default.
- W2048594021 modified "2023-10-16" @default.
- W2048594021 title "Persistent right sinus venosus valve." @default.
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- W2048594021 doi "https://doi.org/10.1136/hrt.47.2.183" @default.
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