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CLINICAL STUDY
JOURNAL ARTICLE
[Efficacy of pegylated-interferon alpha-2a treatment in patients with HBeAg-positive chronic hepatitis B and partial viral response to nucleoside analogue therapy].
Zhonghua Gan Zang Bing za Zhi = Zhonghua Ganzangbing Zazhi = Chinese Journal of Hepatology 2015 November
OBJECTIVE: To investigate the efficacy and related factors of pegylated-interferon alpha-2a (PEG-IFN-2a) treatment in patients with hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) who achieved partial viral response with nucleoside analogue (NA) therapy.
METHODS: Patients with HBeAg-positive CHB and partial viral response to NA treatment were administered a PEG-IFN-2a therapy regimen of 180 g subcutaneous injection once weekly for a personlized duration of time. The existing NA therapy was continued in combination with the new PEG-IFN-2a treatment for 12 weeks. Measurements of serum HBV DNA load, hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (anti-HBs), HBeAg and hepatitis B e antibody (anti-HBe) were taken at baseline (prior to addition of the PEG-IFN-2a therapy) and every 3 months afterwards.For determining response to treatment, primary efficacy was defined as undetectable HBsAg and seroconversion, and secondary efficacy was defined as HBsAg less than 10 IU/mL and HBeAg seroconversion.Statistical analysis was carried out using SPSS statistical software.
RESULTS: A total of 81 consecutive patients with an average of 12.0 months (range: 6.0-24.0 months) of NA therapy were included in the study and received an average of 19.6 months (range: 15.5-33.3 months) of PEG-IFN-2a treatment. At the end of PEG-IFN-2a therapy, 7 (8.6%) of the patients achieved undetectable HBsAg and seroconversion, and 14 (17.3%) showed HBsAg less than 10IU/mL. In addition, 40.7% achieved undetectable HBeAg and seroconversion, a rate that was slightly higher than that (38.3%) seen in treatment-naive patients who received PEG-IFN-2a. Statistical analyses suggest that baseline level of HBsAg at less than 1500 IU/mL may predict end of PEG-IFN-2a treatment response for HBsAg less than 10 IU/mL, as evidenced by the area under the curve measure of 0.747, sensitivity measure of 87.3%, specificity measure of 33.3%, positive predictive value of 82.1% and negative predictive value of 42.8%.
CONCLUSION: Patients with HBeAg-positive CHB and partial viral response to NA therapy can achieve undetectable HBsAg and HBeAg seroconversion after switching to PEG-IFN-2a treatment. Baseline HBsAg level may be predictive of response to this therapeutic strategy.
METHODS: Patients with HBeAg-positive CHB and partial viral response to NA treatment were administered a PEG-IFN-2a therapy regimen of 180 g subcutaneous injection once weekly for a personlized duration of time. The existing NA therapy was continued in combination with the new PEG-IFN-2a treatment for 12 weeks. Measurements of serum HBV DNA load, hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (anti-HBs), HBeAg and hepatitis B e antibody (anti-HBe) were taken at baseline (prior to addition of the PEG-IFN-2a therapy) and every 3 months afterwards.For determining response to treatment, primary efficacy was defined as undetectable HBsAg and seroconversion, and secondary efficacy was defined as HBsAg less than 10 IU/mL and HBeAg seroconversion.Statistical analysis was carried out using SPSS statistical software.
RESULTS: A total of 81 consecutive patients with an average of 12.0 months (range: 6.0-24.0 months) of NA therapy were included in the study and received an average of 19.6 months (range: 15.5-33.3 months) of PEG-IFN-2a treatment. At the end of PEG-IFN-2a therapy, 7 (8.6%) of the patients achieved undetectable HBsAg and seroconversion, and 14 (17.3%) showed HBsAg less than 10IU/mL. In addition, 40.7% achieved undetectable HBeAg and seroconversion, a rate that was slightly higher than that (38.3%) seen in treatment-naive patients who received PEG-IFN-2a. Statistical analyses suggest that baseline level of HBsAg at less than 1500 IU/mL may predict end of PEG-IFN-2a treatment response for HBsAg less than 10 IU/mL, as evidenced by the area under the curve measure of 0.747, sensitivity measure of 87.3%, specificity measure of 33.3%, positive predictive value of 82.1% and negative predictive value of 42.8%.
CONCLUSION: Patients with HBeAg-positive CHB and partial viral response to NA therapy can achieve undetectable HBsAg and HBeAg seroconversion after switching to PEG-IFN-2a treatment. Baseline HBsAg level may be predictive of response to this therapeutic strategy.
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