title: Quantification of hepatitis B surface antigen and E antigen: correlation between Elecsys and architect assays.
abstract: Quantification of hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg) and their change model during treatment are emerging as a useful tool for assessing the outcome of hepatitis B virus (HBV) infection and predicting the efficacy of antiviral therapy. The aim of this study was to compare the performance of the Elecsys and Architect assays for HBsAg and HBeAg quantification. Quantification of HBsAg and HBeAg, determined by these two assays, were assessed in 1292 sera from patients with chronic hepatitis B(CHB). HBeAg quantification in serum was performed by calibrating the results through HBeAg Paul-Ehrlich international (PEI) reference standard. The HBV genotype was determined by direct sequencing and phylogenetic analysis. Of 1292 samples, the distribution of genotype was 514 (39.78%) genotype B, 776 (60.06%) genotype C, 2 (0.16%) genotype D. The results of HBsAg and HBeAg quantification between the Architect and Elecsys assays were significantly correlated (HBsAg: r = 0.939; HBeAg: r = 0.987), independent of HBV genotype and treatment phase. The mean differences between the two methods (the log10 [Elecsys] - the log10 [Architect]) were 0.075 log10  IU/mL and -0.149 log10 PE IU/mL in quantifying HBsAg and HBeAg, respectively. This study demonstrates a high correlation between the Elecsys and the Architect assays in quantifying HBsAg and HBeAg, regardless of HBV genotype. Both the two assays can be used to monitor the HBsAg and HBeAg levels in patients with chronic hepatitis B.
authors: Institute of Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
authors: B
authors: B
authors: Zhou
authors: M
authors: M
authors: Liu
authors: G
authors: G
authors: Lv
authors: H
authors: H
authors: Zheng
authors: Y
authors: Y
authors: Wang
authors: J
authors: J
authors: Sun
authors: J
authors: J
authors: Hou
mesh_terms: D000998:Antiviral Agents / Q000627:therapeutic use; D005838:Genotype; D006514:Hepatitis B Surface Antigens / Q000097:blood*; D006513:Hepatitis B e Antigens / Q000097:blood*; D006515:Hepatitis B virus / Q000302:isolation & purification; D019694:Hepatitis B, Chronic / Q000175:diagnosis* / Q000188:drug therapy; D006801:Humans; D010802:Phylogeny; D011933:Reagent Kits, Diagnostic; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D000077712:Telbivudine; D013936:Thymidine / Q000031:analogs & derivatives / Q000627:therapeutic use
chemical_list: D000998:Antiviral Agents; D006514:Hepatitis B Surface Antigens; D006513:Hepatitis B e Antigens; D011933:Reagent Kits, Diagnostic; D000077712:Telbivudine; D013936:Thymidine