Pegylated interferon α-2a(Peg-IFN-α)and Nucleoside analog(ue) drugs can inhibit viral replication , but Peg-IFN-α also play an important role in immune regulation . In hepatitis B infection, cytokines including Fit-3L, IFN-alpha2, IFN-gama, IL-10, IL-17A,IL-2, IL-6, TNF-alpha, TGF-beta1, TGF-beta2,TGF-beta3, played a vital role.Peg-IFN-α recommended as the first-line treatment has a higher chance to achieve HBeAg seroconversion and even HBsAg disappearance than nucleoside analog(ue) drugs, which might be related to the increase of cytokine secretion in the case of hepatitis and during Peg-IFN-α therapy.This study was aimed at investigating the changes of cytokines during Peg-IFN-αand nucleoside analog(ue) therapy.Meanwhile, the investigators wanted to clarify whether Peg-IFN-α therapy led to the secretion of cytokines.