Result: As expected, ETV at 1 to 1,000 nM concentrations failed to block HBVETV-RL180M/S202G/M204V replication; even the highest concentration (1,000 nM) of ETV failed to achieve 50% signal reduction as shown in.
Result: By contrast, both CAdA and CdG significantly blocked HBVETV-RL180M/S202G/M204V replication in a dose-response fashion.
Result: CAdA and CdG block HBVETV-RL180M/S202G/M204V and HBVADV-RA181T/N236T replication.
Result: ETV, at a dose of 0.02 mg/kg/day, showed essentially no reduction in HBVETV-RL180M/S202G/M204V viremia levels (lower panel.
Result: HBVETV-RL180M/S202G/M204
Delayed Reduction of Hepatitis B Viral Load and Dynamics of Adefovir-Resistant Variants during Adefovir plus Entecavir Combination Rescue Therapy.
PMID: 26005376
2015
International journal of medical sciences
Abstract: Moreover, no LAM-resistant rtM204I/V or ETV-resistant variants were detected during the 27-36 months of combination therapy.
Discussion: In addition, no LAM-resistant rtM204I/V or ETV-resistant variants were selected during 27-36 months of combination therapy.
Discussion: It should be noted that during ADV-ETV combination rescue therapy, although the replication of ADV-resistant variants, rtA181V and/or rtN236T, was fully inhibited and no LAM-resistant rtM204I/V or ETV-resistant variants were selected after 27-36 months of combination rescue therapy, HBV DNA reduction was delayed even with potent ADV-ETV c
[The drug resistance mutation detection and relevant factors analysis of HBV P region in chronic hepatitis B patients in Weifang City, Shandong Province].
Abstract: Among 11/127 (8.7%) patients with high-level persistent viraemia (last HBV VL: >=10(5) copies/ml), only two harboured incident LAM-resistance mutations at positions rtV173L+rtL180M+rtM204V with no patient exhibiting TDF/FTC-resistance.
Characterization of novel entecavir resistance mutations.
Abstract: RESULTS: The incidence of rtA181T across the study population was 4.1% (165/3, 013), and most of the rtAl 81T-positive patients had received adefovir and/or lamivudine.Forty percent (66/165) of the rtA 181T cases were single mutants and treatment responsive, 46.1% (76/165) included the adefovir-resistant mutation rtA 181 V/N236T, 12.1% (20/165) included the lamivudine-resistant mutation rtM204V/rtM2041, and 1.8% (3/165) included multidrug-resistant mutations.Interestingly, 73.9% (122/165) of the rtA181T-positive samples were detected with co-existing wild-type nucleotides at the site.
New amino acid changes in drug resistance sites and HBsAg in hepatitis B virus genotype H.
Abstract: Three major patterns of mutations in HBV polymerase gene, namely single (rtM204V), double (rtL180M+rtM204V) and triple (rtV173L+rtL180M+rtM204V) mutations, are associated with 3TC-resistance; additionally, the triple mutation has vaccine-escape potential due to a corresponding change in overlapping surface gene.