Abstract
Responsiveness to the hepatitis B virus (HBV) vaccination in hemodialysis (HD) patients who had been exposed to the hepatitis E virus (HEV) and persistently generate antibodies against HEV remains unknown. Interferon (IFN)-λ3 positively correlates with the surface HBV antibodies (anti-HBs) in both healthy and HD subjects. We aimed to show whether HD patients differ in circulating IFN-λ3 and vaccine-induced anti-HBs titers concerning natural HEV immunization. HBV/HCV negative HD patients (31 HEV IgG positive, 45 HEV negative), HBV vaccinated and receiving booster doses as needed, had been tested for anti-HBs titers (CMIA) and IFN-λ3 concentrations (ELISA) in the blood collected before a dialysis session. There were no differences in circulating IFN-λ3 and anti-HBs titers between both groups. In responders to the HBV vaccine, there was a positive correlation between plasma IFN-λ3 levels and anti-HBs titers (r = 0.505, adjusted P = 0.01 in HEV exposed subjects; r = 0.523, adjusted P = 0.001 in controls). HEV past infection does not attenuate post-vaccination anti-HBs generation and does not influence a correlation between circulating IFN-λ3 levels and anti-HBs titers.
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