Emergence and takeover of YMDD motif mutant hepatitis B virus during long-term lamivudine therapy and re-takeover by wild type after cessation of therapy
نویسندگان
چکیده
منابع مشابه
Emergence of YMDD mutant hepatitis B virus after allogeneic stem cell transplantation from a HBsAG-positive donor during lamivudine prophylaxis.
A high incidence of HBV-related hepatitis is associated with the use of HBsAg-positive marrow for transplantation, and the high viral load in the donor appears to predispose recipients to the development of HBV-related hepatitis postransplant. Preemptive use of lamivudine has proved to reduce hepatitis B exacerbation in HBsAgpositive recipients of allogeneic HCT. Since 2000, the policy in our m...
متن کاملIdentification of a new variant in the YMDD motif of the hepatitis B virus polymerase gene selected during lamivudine therapy.
A new hepatitis B virus variant selected during lamivudine treatment was detected, in which the methionine (rtM204) in the so-called YMDD motif in the C domain of the catalytic site of the polymerase gene was replaced by a serine (rtM204S). This change simultaneously resulted in a tyrosine-195 into valine variant (sY195V) in the surface protein HBsAg. The detection of this YSDD variant was init...
متن کاملhepatitis b virus ymdd-motif mutations with emergence of lamivudine-resistant mutants: a threat to recovery
hepatitis b virus (hbv) is a crucial public health problem with approximately 350 million affected people and a death rate of 0.5 to 1.2 million per year worldwide. it proceeds to end-stage liver diseases including cirrhosis with hepatic decompensation and hepatocellular carcinoma (hcc). pakistan lies in the endemic region with 3% hbv carrier rate in the country. the differences in disease outc...
متن کاملPrevalence and clinical correlates of YMDD variants during lamivudine therapy for patients with chronic hepatitis B.
YMDD variants of hepatitis B virus (HBV) emerge in some patients with chronic hepatitis B who receive lamivudine. YMDD variants were examined in 794 patients in 4 controlled studies of 1 year's duration. The long-term effects of YMDD variants were examined in a subset of patients treated up to 4 years. YMDD variants were detected by polymerase chain reaction (PCR) and restriction fragment-lengt...
متن کاملFrequency of YMDD mutations in patients with chronic hepatitis B untreated with antiviral medicines
Abstract Background: Investigators were suspicious of tyrosine-methionine-aspartate-aspartate (YMDD) mutations occurred only in patients who were treated by lamivudine. However, YMDD mutations of hepatitis B virus gene (HBV DNA) in patients with chronic hepatitis B (CHB) untreated with antiviral medicines was reported in some studies. The aim of this study was to evaluate YMDD mutations in Ira...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Hepatology
سال: 1998
ISSN: 0270-9139,1527-3350
DOI: 10.1002/hep.510270634