نتایج جستجو برای: ymdd mutant

تعداد نتایج: 129717  

Journal: :Journal of clinical microbiology 1999
V Thibault Y Benhamou C Seguret M Bochet C Katlama F Bricaire P Opolon T Poynard H Agut

Mutations associated with hepatitis B virus (HBV) resistance to lamivudine have not been extensively addressed in human immunodeficiency virus (HIV)-HBV coinfection. We have studied the HBV polymerase sequences from nine coinfected patients who experienced HBV recurrence while under lamivudine treatment. In seven of these nine patients, Met(550), belonging to the highly conserved YMDD motif, wa...

2014
Peijie Wang Ngalei Tam Haochen Wang Huanwei Zheng Philip Chen Linwei Wu Xiaoshun He

BACKGROUND & AIMS Application of nucleoside analogues and hepatitis B immunoglobulin (HBIG) has reduced hepatitis B virus (HBV) recurrence rate after liver transplantation (LT) dramatically. Recent data suggests therapy without HBIG is also effective. We sought to evaluate the necessity of HBIG in prophylaxis of HBV recurrence after LT. METHODS A meta-analysis was performed. PubMed/MEDLINE, W...

2016
Yasuyuki Hara Kazuaki Tokodai Chikashi Nakanishi Shigehito Miyagi Naoki Kawagishi

BACKGROUND Hepatitis B core antibody (HBcAb)-positive graft is reported to cause de novo hepatitis B after liver transplantation with a probability of 38-100 % without prophylaxis. Hepatitis B surface antigen loss is reported to be achieved with a probability of only 3-8 % in the patients treated by antiviral agents. We present an extremely rare case of spontaneous resolution of de novo hepatit...

Journal: :Journal of clinical microbiology 2007
Evelien Libbrecht Joke Doutreloigne Hilde Van De Velde Man-Fung Yuen Ching-Lung Lai Fred Shapiro Erwin Sablon

With the availability of more potent nucleotide/nucleoside analogues, the early detection of drug-resistant mutants of hepatitis B virus (HBV) is important for the strategic treatment of chronic hepatitis B. We studied 336 serum samples from 80 patients chronically infected with HBV who were receiving lamivudine treatment for the presence of lamivudine resistance mutations at codons 80, 173, 18...

Journal: :gastroenterology and hepatology from bed to bench 0
muhammad idrees zunaira awan shazia rafique irshad-ur rehman haji akbar sadia butt

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...

Journal: :Journal of bacteriology 2008
Dennis R Harris Khanh V Ngo Michael M Cox

DdrA protein binds to and protects 3' DNA ends and is essential for preserving the genome integrity of Deinococcus radiodurans following treatment by gamma radiation in an environment lacking nutrients. Limited proteolysis was used to identify a stable and functional protein core, designated DdrA157, consisting of the first 157 residues of the protein. In vitro, the biochemical differences betw...

Journal: :journal of sciences islamic republic of iran 0

a one kb portion of the rpos gene from flexibacter chinensis was isolated by pcr, sequenced and compared to the rpos gene of a variety of other organisms. the gene was found to be 98% similar to previously sequenced genes. mutation of the rpos gene with tri-parental mating produced strain jr101 and the growth rate of the mutant was compared with that of the wild-type. the mutant grew slower, an...

Drought stress is one of the important factors that restrict crop production in the world. This study was conducted to investigate defense gene expression in response to drought stress, and also to evaluate the drought tolerance and its mechanism in rice cultivars based on randomized complete block design in two separate environments (drought stress and non-stress). The rice cultivars used incl...

امیرلو, فرنگیس, باقری, خدیجه, شهبازی, سمیرا, عسکری, حامد, موجرلو, شیده,

Trichoderma species have been famous for production of cellulases with relatively high enzymatic activity. However, attempts to use their cellulolytic enzymes in the bioconversion of cellulosic wastes have not been successful because of high cost of production and low enzymatic yields. This study aimed to obtain gamma-induced mutants of T. viride with enhanced extracellular cellulase production...

Mutant genetic materials are valuable tools for understanding the physiology of remobilization and could be useful in the breeding of drought tolerant varieties. Two advanced mutant lines of bread wheat (T-67-60 and T-65-7-1) along with their wild type (Tabasi Cv.) were planted at two moisture conditions (normal and 30-40% of field capacity) as a factorial experiment in format of completely ran...

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