CpG oligodeoxynucleotides discriminately enhance binding capacity of human naïve B cells to Hepatitis B virus epitopes

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CpG oligodeoxynucleotides (CpG ODN) have the potential to enhance the antigen-presenting cells function of human naïve B cells. In this study, we aim to define the effect of CpG ODNs on the binding capacity of human naïve B cells for different Hepatitis B virus (HBV) epitopes. Three HLA-A2 restricted epitopes were selected to incubate with CpG ODN-primed human naïve B cells. Binding capacity for each epitope and expression of CD80, CD86, class I major histocompatibility complex (MHC), and class II MHC of naïve B cells was tested, respectively, by flow cytometry. CpG ODNs, especially ODN 2216, enhanced the binding capacity of human naïve B cells for HBV epitopes (p < 0.01), and induced markedly higher expression of CD80, CD86, class I MHC, and class II MHC. The binding capacity of CpG-treated naive B cells for each epitope was significantly different. In all the 3 subjects, CpG ODN 2216-primed naïve B cells showed the highest binding ability for Env172–180 compared with the other epitopes with a high expression of co-stimulatory and MHC molecules. CpG ODN showed the potential to selectively enhance the binding capacity of human naïve B cells for HBV epitopes. These results suggest new strategies for development of vaccine design.

Keywords: CpG oligodeoxynucleotide; Hepatitis B virus; epitope; human naïve B cell; lymphocytes B naïfs humains; oligodéoxynucléotides CpG; virus de l’hépatite B; épitope

Document Type: Research Article

DOI: http://dx.doi.org/10.1139/w2012-045

Affiliations: 1: Department of Gastroenterology, Southwest Hospital, Third Military Medical University, Chongqing 400038, P. R. of China. 2: Department of Nephrology, Xinqiao Hospital, Third Military Medical University, Chongqing 400038, P. R. of China.

Publication date: June 22, 2012

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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