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<http://www.docguide.com/antiviral-drug-resistance-testing-patients-chronic-hepatitis-b?hash=04301bd4&eid=21056&alrhash=2e06a4-d460252966da8019c5213f6ae197892e>
Source: Dig Dis Sci | Posted 4 days ago
慢性乙型肝炎患者的抗病毒药物
耐药性测试
Antiviral Drug Resistance Testing in Patients with Chronic Hepatitis B
Wong VW, Wong GL, Tse CH, Yuen LK, Chan HY, Locarnini SA, Chan HL;
Digestive Diseases and Sciences (Jul 2011)
BACKGROUND: Antiviral drugs against hepatitis B virus are limited by the
emergence of drug resistance. AIMS: We aimed to study the impact of drug
resistance testing on treatment decisions. METHODS: In part 1 of this
study, consecutive patients with chronic hepatitis B who had antiviral drug
resistance testing were studied. Part 2 was a two-step questionnaire survey
including ten characteristic case scenarios. Hepatologists were asked about
their treatment decisions before and after the knowledge of drug resistance
results. RESULTS: Fifty-one patients underwent drug resistance testing,
most of whom were on lamivudine, adefovir dipivoxil or entecavir
monotherapy. Thirty-four (67%) patients had drug-resistant mutants
detected, 4 (8%) had low viral load, and 13 (25%) harboured wild-type
virus. Twenty-nine of 34 (85%) patients harbouring drug-resistant mutants
and 9 of 17 (53%) patients with no mutants detected changed their drug
regimens (P = 0.038). In part 2, 18 hepatologists completed all two
questionnaires. Overall, treatment decision was modified in 52% of cases
upon receiving the drug resistance testing results. The detection of
rtA181V/I resulted in decision changes in most hepatologists, with the
preferred treatment switching from tenofovir to entecavir. When no mutants
were detected in partial responders to entecavir monotherapy, most
hepatologists chose to increase the dose of entecavir.
CONCLUSIONS:
Drug-resistant mutations are detected in around two-thirds of chronic
hepatitis B patients undergoing drug resistance testing. Drug resistance
testing alters management in over half of the cases, and should be
considered in all patients with virological breakthrough and suboptimal
virological suppression.
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