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Wando Mount Pleasant Library
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HBV-Derived Synthetic Long Peptide Can Boost CD4+ and CD8+ T-Cell Responses in Chronic HBV Patients Ex Vivo.
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- Author(s): Yingying Dou; van Montfoort, Nadine; van den Bosch, Aniek; de Man, Robert A.; Zom, Gijs G.; Krebber, Willem-Jan; Melief, Cornelis J. M.; Buschow, Sonja I.; Woltman, Andrea M.; Dou, Yingying (AUTHOR)
- Source:
Journal of Infectious Diseases. Mar2018, Vol. 217 Issue 5, p827-839. 13p. - Source:
- Additional Information
- Subject Terms: CHRONIC hepatitis B; HEPATITIS B virus; T cells; CD4 antigen; DENDRITIC cells; BIOLOGICAL models; CELLULAR immunity; COMPARATIVE studies; IMMUNOTHERAPY; INTERFERONS; RESEARCH methodology; MEDICAL cooperation; RECOMBINANT proteins; RESEARCH; TUMOR necrosis factors; VIRAL antigens; EVALUATION research; THERAPEUTICS
- Abstract:
Background: Vaccination with synthetic long peptides (SLP) is a promising new treatment strategy for chronic hepatitis B virus (CHB). SLP can induce broad T-cell responses for all HLA types. Here we investigated the ability of a prototype HBV-core (HBc)-sequence-derived SLP to boost HBV-specific T cells in CHB patients ex vivo.Methods: HBc-SLP was used to assess cross-presentation by monocyte-derived dendritic cells (moDC) and BDCA1+ blood myeloid DC (mDC) to engineered HBV-specific CD8+ T cells. Autologous SLP-loaded and toll-like receptor (TLR)-stimulated DC were used to activate patient HBc-specific CD8+ and CD4+ T cells.Results: HBV-SLP was cross-presented by moDC, which was further enhanced by adjuvants. Patient-derived SLP-loaded moDC significantly increased autologous HBcAg18-27-specific CD8+ T cells and CD4+ T cells ex vivo. HBV-specific T cells were functional as they synthesized tumor necrosis factor-alpha and interferon-gamma. In 6/7 of patients blockade of PD-L1 further increased SLP effects. Also, importantly, patient-derived BDCA1+ mDC cross-presented and activated autologous T-cell responses ex vivo.Conclusions: As a proof of concept, we showed a prototype HBc-SLP can boost T-cell responses in patients ex vivo. These results pave the way for the development of a therapeutic SLP-based vaccine to induce effective HBV-specific adaptive immune responses in CHB patients. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of Journal of Infectious Diseases is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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