title: Circulating Th17 cells frequency is associated with the disease progression in HBV infected patients.
abstract: OBJECTIVE
  Th17 cells have been shown to mediate host defensive mechanisms in various infections, but their role in HBV infection in humans has not been well characterized. In this study, we analyzed the frequency and cytokines secretion of circulating Th17 cells in HBV infected patients with different statuses, and also evaluated the potential association of Th17 frequency with the levels of liver injury.
  
  
  METHODS
  The study population consisted of 133 subjects, including 40 mild chronic hepatitis B (CHB) patients, 37 severe CHB patients, 20 acute hepatitis B (AHB) patients and 36 healthy controls. The frequency of circulating Th17 cells were carried out by intracellular cytokine staining analysis and serum IL-10 levels were measured by ELISA.
  
  
  RESULTS
  Our data shown that AHB and severe CHB patients had a significant increase of Th17 cells frequency in peripheral blood compared with mild CHB patients and healthy control (both P < 0.05). The elevated prevalence of Th17 cells is positively associated with the increased serum ALT levels in severe CHB patients (r= 0.457, P= 0.004) but had no correlation with serum HBV DNA load. In addition, the serum IL-10 were negatively correlated with the frequency of Th17 cells in PBMC from patients with chronic HBV infection (r=-0.452, P < 0.01).
  
  
  CONCLUSIONS
  Th17 cells may contribute to the disease progression and pathogenesis of liver injury in HBV infected patients, and the induction of IL-10 may be one mechanism of constraining pro-inflammatory Th17 responses.
authors.affiliation: State Key Laboratory of Infectious Disease Diagnosis and Treatment, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Haihong
authors.initials: H
authors.lastname: Zhu
authors.forename: Guoping
authors.initials: G
authors.lastname: Peng
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000208:Acute Disease; D000328:Adult; D000410:Alanine Transaminase / Q000097:blood; D015415:Biomarkers / Q000097:blood; D018791:CD4 Lymphocyte Count; D016207:Cytokines / Q000097:blood*; D004279:DNA, Viral / Q000097:blood; D018450:Disease Progression; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006509:Hepatitis B / Q000175:diagnosis / Q000276:immunology*; D006515:Hepatitis B virus / Q000235:genetics / Q000276:immunology*; D019694:Hepatitis B, Chronic / Q000175:diagnosis / Q000276:immunology*; D006801:Humans; D016753:Interleukin-10 / Q000097:blood; D020381:Interleukin-17 / Q000097:blood; D008099:Liver / Q000276:immunology / Q000473:pathology / Q000821:virology; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000821:virology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology* / Q000821:virology; D019562:Viral Load; D055815:Young Adult
chemical_list: D015415:Biomarkers; D016207:Cytokines; D004279:DNA, Viral; C508609:IL10 protein, human; D020381:Interleukin-17; D016753:Interleukin-10; D000410:Alanine Transaminase