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Circulating BAFF and CXCL10 levels predict response to pegylated interferon in patients with HBeAg-positive chronic hepatitis B.
Asian Pacific Journal of Allergy and Immunology 2019 January 14
BACKGROUND: B-cell activating factor (BAFF), an essential cytokine for B lymphocytes activation, has been implicated in the pathogenesis of chronic viral hepatitis. However, the role of BAFF in patients with chronic hepatitis B (CHB) undergoing antiviral therapy is unknown.
METHODS: Patients with HBeAg-positive CHB treated with 48-week pegylated interferon (PEG-IFN; n = 42), who had stored plasma samples during treatment were recruited. Serial plasma levels of BAFF and C-X-C motif chemokine 10 (CXCL10) during therapy were measured.
RESULTS: Combined response (CR), defined as HBeAg seroconversion with HBV DNA < 2,000 IU/mL plus HBsAg decline ≥ 1 log10 IU/mL at 24 weeks post-treatment, was achieved in 11 (26.2%) patients. BAFF levels were elevated during treatment but decreased to pre-treatment levels after PEG-IFN cessation in both responders and non-responders. Low baseline BAFF (< 770 pg/ml) and high CXCL10 (≥ 320 pg/ml) levels were independently associated with CR in multivariate analysis. Baseline CXCL10/BAFF ratio of ≥ 0.45 was predictive of CR with positive and negative predictive values of 61.5 and 89.7%, respectively.
CONCLUSIONS: In summary, low baseline BAFF and high CXCL10 levels were associated with treatment response to PEGIFN. The combined measurement of these immune markers may help individualized decision-making in patients with HBeAg-positive CHB.
METHODS: Patients with HBeAg-positive CHB treated with 48-week pegylated interferon (PEG-IFN; n = 42), who had stored plasma samples during treatment were recruited. Serial plasma levels of BAFF and C-X-C motif chemokine 10 (CXCL10) during therapy were measured.
RESULTS: Combined response (CR), defined as HBeAg seroconversion with HBV DNA < 2,000 IU/mL plus HBsAg decline ≥ 1 log10 IU/mL at 24 weeks post-treatment, was achieved in 11 (26.2%) patients. BAFF levels were elevated during treatment but decreased to pre-treatment levels after PEG-IFN cessation in both responders and non-responders. Low baseline BAFF (< 770 pg/ml) and high CXCL10 (≥ 320 pg/ml) levels were independently associated with CR in multivariate analysis. Baseline CXCL10/BAFF ratio of ≥ 0.45 was predictive of CR with positive and negative predictive values of 61.5 and 89.7%, respectively.
CONCLUSIONS: In summary, low baseline BAFF and high CXCL10 levels were associated with treatment response to PEGIFN. The combined measurement of these immune markers may help individualized decision-making in patients with HBeAg-positive CHB.
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