BACKGROUND/AIMS: Early detection of antiviral drug-resistant mutations enables prompt initiation of rescue therapy. The aim of this study was to determine the accuracy and sensitivity of a new line probe assay in the detection of antiviral drug-resistant HBV mutations. METHODS: One-hundred samples from 54 patients with virologic breakthrough during entecavir, lamivudine or adefovir treatment and 21 samples from 21 nucleoside-naïve patients were tested by direct sequencing and an updated line probe assay (Innogenetics, HBV DR v.3) which incorporates probes that can detect mutations at 11 positions of the reverse transcriptase region of the HBV polymerase gene. RESULTS: Complete concordance between line probe and sequencing results was observed for 90/121 samples (74.3%) and 1291/1331 amino acid positions (96.9%). Testing of follow-up samples and clonal analysis of discordant samples confirmed the presence of mutations where line probe assay but not direct sequencing detected mutations. HBV DR v.3 assay consistently detected mutations present in > or = 5% of the virus population when HBV DNA concentration was > or = 4 log10copies/mL. CONCLUSIONS: The updated version of the line probe assay (HBV DR v.3) has high concordance with direct sequencing in detecting antiviral drug-resistant mutations but its sensitivity in detecting mutations at some positions needs to be improved.
BACKGROUND/AIMS: Early detection of antiviral drug-resistant mutations enables prompt initiation of rescue therapy. The aim of this study was to determine the accuracy and sensitivity of a new line probe assay in the detection of antiviral drug-resistant HBV mutations. METHODS: One-hundred samples from 54 patients with virologic breakthrough during entecavir, lamivudine or adefovir treatment and 21 samples from 21 nucleoside-naïve patients were tested by direct sequencing and an updated line probe assay (Innogenetics, HBV DR v.3) which incorporates probes that can detect mutations at 11 positions of the reverse transcriptase region of the HBV polymerase gene. RESULTS: Complete concordance between line probe and sequencing results was observed for 90/121 samples (74.3%) and 1291/1331 amino acid positions (96.9%). Testing of follow-up samples and clonal analysis of discordant samples confirmed the presence of mutations where line probe assay but not direct sequencing detected mutations. HBV DR v.3 assay consistently detected mutations present in > or = 5% of the virus population when HBV DNA concentration was > or = 4 log10copies/mL. CONCLUSIONS: The updated version of the line probe assay (HBV DR v.3) has high concordance with direct sequencing in detecting antiviral drug-resistant mutations but its sensitivity in detecting mutations at some positions needs to be improved.
Authors: Vincent Wai-Sun Wong; Grace Lai-Hung Wong; Chi-Hang Tse; Lilly K W Yuen; Hoi-Yun Chan; Stephen A Locarnini; Henry Lik-Yuen Chan Journal: Dig Dis Sci Date: 2011-07-09 Impact factor: 3.199
Authors: B Degertekin; Steven-Huy B Han; E B Keeffe; E R Schiff; V A Luketic; R S Brown; S Emre; C Soldevila-Pico; K R Reddy; M B Ishitani; T T Tran; T L Pruett; A S F Lok Journal: Am J Transplant Date: 2010-03-23 Impact factor: 8.086
Authors: Andrea L Cathcart; Henry Lik-Yuen Chan; Neeru Bhardwaj; Yang Liu; Patrick Marcellin; Calvin Q Pan; Maria Buti; Stephanie Cox; Bandita Parhy; Eric Zhou; Ross Martin; Silvia Chang; Lanjia Lin; John F Flaherty; Kathryn M Kitrinos; Anuj Gaggar; Namiki Izumi; Young-Suk Lim Journal: Antimicrob Agents Chemother Date: 2018-09-24 Impact factor: 5.191
Authors: Natalie Bzowej; Steven Han; Bulent Degertekin; Emmet B Keeffe; Sukru Emre; Robert Brown; Rajender Reddy; Anna S Lok Journal: Liver Transpl Date: 2009-09 Impact factor: 5.799