Prediction of antiviral efficacy in patients with chronic hepatitis C by changes in forkhead box protein 3 levels

Area of Science:

• Immunology
• Hepatology
• Virology

Background:

• Chronic hepatitis C virus (HCV) infection is a significant global health concern.
• Regulatory T cells (Tregs) play a crucial role in immune homeostasis and tolerance.
• Altered Treg populations have been implicated in various chronic viral infections.

Purpose of the Study:

• To investigate the distribution of CD4+CD25+ regulatory T cells (Tregs) in the peripheral blood of patients with chronic hepatitis C.
• To determine if Treg distribution predicts the efficacy of antiviral therapy for HCV.
• To explore the relationship between Treg frequency and HCV-RNA load.

Main Methods:

• Peripheral blood samples were collected from patients with chronic hepatitis C and healthy controls.
• Flow cytometry was used to detect CD4+CD25+ forkhead box protein (FOXP) 3+ Tregs within the CD4+ T cell population.
• Quantitative-fluorescence polymerase chain reaction (PCR) measured the hepatitis C virus (HCV)-RNA load.

Main Results:

• The frequency of CD4+CD25+FOXP3+ Tregs was significantly higher in chronic hepatitis C patients (14.24±1.33%) compared to healthy controls (5.62±1.21%; P<0.001).
• A positive correlation was observed between the frequency of CD4+CD25+FOXP3+ Tregs and the HCV-RNA load (r=0.73; P=0.032).

Conclusions:

• CD4+CD25+FOXP3+ Treg expression is increased in patients with chronic HCV infection.
• Elevated Treg levels positively correlate with viral load in chronic hepatitis C.
• These findings suggest a potential role for Tregs in HCV pathogenesis and may inform treatment strategies.