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Functionally aberrant dendritic cell subsets and expression of DC-SIGN differentiate acute from chronic HBV infection

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Abstract

Background

Dendritic cells (DCs) promote pathogen recognition, uptake and presentation of antigen through DC-specific intercellular adhesion molecule 3-grabbing non-integrin (DC-SIGN) and toll-like receptors (TLRs).

Aims and Objectives

We aimed to study temporal changes in DCs, TLRs and DC-SIGN during acute viral hepatitis B (AVHB) infection and compare them to chronic (CHB) and to investigate the earliest time point of activated pathogen recognition receptors in hepatitis B viral infection.

Methods

We measured the frequencies of circulating myeloid (mDC) and plasmacytoid (pDC) dendritic cells and IFN-α production along with the expression of DC-SIGN and Toll Like Receptors (TLR's) in HBV patients at different time points. Also investigated in healthy volunteers, the dynamic changes in TLRs expression after receiving hepatitis B vaccine.

Results

On follow-up of AVHB patients, we found the mDC population was significantly higher at week 4 and 6 (p < 0.02, 0.01), whereas the pDC population was unchanged at week 6 compared with week 0. Whereas frequencies of mDCs and pDCs were found to be elevated in AVHB and CHB patients than HC (p < 0.00 and 0.01, respectively) but was comparable among AVHB vs CHB. The DCs in CHB patients were functionally impaired with significantly low IFN-α production and low DCSIGN expression (p < 0.04 and 0.00, respectively). Even after stimulation by TLR agonists, no change was found in IFN-α production in CHB patients. MyD88 and IL-6, IFN-α mRNA levels were also found down-regulated. Interestingly, on follow-up after HBV vaccine, TLRs expression was found high at day 3 after vaccination.

Discussion

The initial events of immune activation might be responsible for modulating immune response. These novel observations would pave the way for the development of antiviral strategies for chronic HBV infection.

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Authors and Affiliations

  1. Department of Molecular and Cellular Medicine, Institute of Liver and Biliary Sciences, Delhi, India

    Sukriti Sukriti, Nirupma Trehanpati, Chandana Pande, Syed S. Hissar & Shiv Kumar Sarin

  2. Department of Hepatology, Institute of Liver and Biliary Sciences, Delhi, India

    Manoj Kumar & Shiv Kumar Sarin

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  1. Sukriti Sukriti
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  2. Nirupma Trehanpati
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  3. Manoj Kumar
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  4. Chandana Pande
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  5. Syed S. Hissar
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  6. Shiv Kumar Sarin
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Corresponding author

Correspondence to Shiv Kumar Sarin.

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Conflict of interest

Sukriti Sukriti, Nirupma Trehanpati, Manoj Kumar, Chandana Pande, Syed S Hissar, Shiv Kumar Sarin declare that they have no conflict of interest.

Ethical approval

All procedures performed in the study involve human participants and were in accordance with the ethical standards of the institutional research board and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Sukriti, S., Trehanpati, N., Kumar, M. et al. Functionally aberrant dendritic cell subsets and expression of DC-SIGN differentiate acute from chronic HBV infection. Hepatol Int 10, 916–923 (2016). https://doi.org/10.1007/s12072-016-9763-0

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  • DOI: https://doi.org/10.1007/s12072-016-9763-0

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