[Frequency and function decrease of circulating type 2 pre-dendritic cells (pDC2) and its clinical significance in...

Area of Science:

• Immunology
• Hepatology
• Virology

Context:

• Chronic Hepatitis B virus (HBV) infection can lead to liver cirrhosis, a condition associated with immune dysregulation.
• Type 2 pre-dendritic cells (pDC2) are crucial for innate and adaptive immune responses through interferon-alpha (IFN-α) production.

Purpose:

• To quantify circulating pDC2 levels and their IFN-α-producing capacity in patients with HBV-related liver cirrhosis.
• To assess the correlation between pDC2 function and other immune cells (CD4+ T cells, CD8+ T cells, NK cells, B cells) in this patient group.

Summary:

• Circulating pDC2 numbers and IFN-α-producing function were significantly lower in liver cirrhotic patients with chronic HBV infection compared to healthy controls and chronic hepatitis B patients.
• A concurrent decrease in CD8+ T cells and NK cells was observed in cirrhotic patients.
• Lower pDC2, CD8+ T cell, and NK cell counts were associated with opportunistic infections in cirrhotic patients.

Impact:

• The diminished pDC2 function and numbers, alongside reduced CD8+ T cells and NK cells, may impair host immune response in HBV-related cirrhosis.
• This immune deficiency could contribute to disease progression and increased susceptibility to opportunistic infections in affected patients.