Overlap/Switch to Adefovir Monotherapy for Lamivudine-resistant Patients Who Responded to Combination Therapy: A Pilot Controlled Study
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概要
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Objective The aim of this study was to investigate the outcome of overlap/switch to adefovir dipivoxil (ADV) monotherapy for chronic hepatitis B (CHB) patients with lamivudine (LAM)-resistant HBV, who responded to LAM plus ADV combination therapy. Methods In 29 of 35 LAM-resistant CHB patients, serum HBV-DNA levels decreased to <3.7 log genome equivalent (LGE)/mL at 12 months after LAM plus ADV combination therapy, defined as complete virological response (CVR). The 29 CVR patients were randomly allocated to continuation of combination therapy or switch to ADV monotherapy within 12 months. The cumulative rates of sustained CVR were compared between the two groups. Results The follow-up duration after randomization was 19.3-36.7 months (median, 28.2 months) for the combination group and 21.0-36.4 months (29.0 months) for the overlap/switch group. The cumulative rate of sustained CVR during the follow-up period was 100% in all patients of both groups. The total medical expenses during follow-up after randomization were median US$20,949 for the combination group and US$16,107 for the overlap/switch group (p=0.012). Overlap/switch to ADV monotherapy sufficiently repressed the replication of LAM-resistant mutants without the development of ADV-resistant mutants. The rate of sustained CVR was not influenced by treatment regimen (continuation of combination therapy or switching to ADV monotherapy), the duration of the overlap period, or patient and virological characteristics. Conclusion In LAM-resistant CHB patients who achieved CVR to LAM plus ADV combination therapy, CVR was maintained after overlap/switch to ADV monotherapy, suggesting that it could be a useful regimen for such patients.
著者
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Tajiri Hisao
Division Of Digestive Endoscopy And Gastrointestinal Oncology National Cancer Center Hospital East
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Baba Masashi
Department Of Immunology Institute Of Medical Science University Of Tokyo
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Tsubota Akihito
Department Of Gastroenterology And Hepatology Kashiwa Hospital
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Sato Ken-ichi
Department Of Agricultural Chemistry The University Of Tokyo:(present Office)nihon Pall Ltd.
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Ohkusa Toshifumi
Department Of Gastroenterology And Hepatology Kashiwa Hospital
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Aizawa Mashu
Department Of Gastroenterology And Hepatology Kashiwa Hospital
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Fujise Kiyotaka
Department Of Gastroenterology And Hepatology Kashiwa Hospital
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Takamatsu Masashi
Department Of Medicine Kawasaki Municipal Ida Hospital
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FUJISE Kiyotaka
Department of Gastroenterology and Hepatology, Kashiwa Hospital
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Namiki Yoshihisa
Institute of Clinical Medicine and Research (ICMR), Jikei University School of Medicine
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Baba Masashi
Department of Gastroenterology and Hepatology, Kashiwa Hospital
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Takamatsu Masashi
Department of Gastroenterology and Hepatology, Kashiwa Hospital
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