نتایج جستجو برای: hbv genotyping

تعداد نتایج: 37195  

2014
Armin Hosseini Razavi Pedram Azimzadeh Seyed Reza Mohebbi Seyed Masoud Hosseini Sara Romani Mahsa Khanyaghma Yasin Hatami Afsaneh Sharifian Mohammad Reza Zali

BACKGROUND Chronic hepatitis B is one of the world's major health concerns [corrected]. The etiological agent of this infection is hepatitis B virus (HBV), which can evade the immune system response. Transforming growth factor beta 1 (TGF-β1) can act against HBV by suppressing the viral replication. The TGF-β1 also plays an important role in preventing liver damage in chronically HBV infected p...

2018
Ya’nan Zhen Ruixue Xiao Xing Chen Changjin Yuan Yanlai Sun Jie Li

Purpose Nijmegen breakage syndrome 1 (NBS1) has a vital role in DNA double-strand break (DSB) repair, functioning as a sensor to identify and repair DNA damage and maintaining genomic stability by participating in the intra-S-phase checkpoint. Polymorphisms of NBS1 have been investigated in multiple cancers with variable results. To our best knowledge, no previous study has focused on the assoc...

2014
Jeyanthi Suppiah Rozainanee Mohd Zain Salbiah Haji Nawi Norazlah Bahari Zainah Saat

BACKGROUND Mutations in the polymerase (P) gene of hepatitis B virus are often associated with drug resistance. The pattern of mutations varies geographically, thus giving rise to genotypes diversity. OBJECTIVES This study was carried out to detect mutations in P gene of hepatitis B virus isolated from Malaysian HBV carriers. MATERIALS AND METHODS A total of 58 sera samples were analyzed by...

Journal: :Annals of King Edward Medical University 2023

Background: Sofosbuvir-Velpatasvir has a high efficacy in adult patients with chronic hepatitis C infection .In this study, we reported treatment outcome drug children and younger adults Pakistani population.
 Objective: To assess the safety of Sofosbuvir-velpatasvir treating HCV-infected young adults. 
 Methods: This Interventional(Clinical trial) was done Hepatitis clinic Jinnah Hos...

Journal: :hepatitis monthly 0
asadollah mohammadi immunology research center (irc), iran university of medical sciences, tehran, ir iran nader tajik immunology research center (irc), iran university of medical sciences, tehran, ir iran; immunology research center (irc), iran university of medical sciences, tehran, ir iran. tel: +98-9123250344, fax: +98-2188622652 alireza shah-hosseini immunology research center (irc), iran university of medical sciences, tehran, ir iran seyed moayed alavian baqiyatallah research center for gastroenterology and liver diseases, baqiyatallah university of medical sciences, tehran, ir iran zohreh sharifi blood transfusion research center, high institute for research and education in transfusion medicine, tehran, ir iran lida jarahi community medicine department, addiction research center, faculty of medicine, mashhad university of medical sciences, mashhad, ir iran

objectives thus, the present study aimed to determine if fas and fasl promoter polymorphisms are associated with the clinical outcome of hbv infection. patients and methods dna samples were obtained from the infected individuals including chronic carrier (n = 50), chronic hepatitis (n = 50), cirrhosis (n = 25), naturally recovered (n = 26) and compared with those of their matched healthy contro...

Journal: :iranian journal of microbiology 0
mohammadreza aghasadeghi hepatitis and aids department, pasteur institute of iran, tehran, iran. mohammad banifazl iranian society for support of patients with infectious diseases, tehran, iran. arezoo aghakhani clinical research department, pasteur institute of iran, tehran, iran. ali eslamifar clinical research department, pasteur institute of iran, tehran, iran. rouhollah vahabpour hepatitis and aids department, pasteur institute of iran, tehran, iran. amitis ramezani clinical research department, pasteur institute of iran, tehran, iran.

background and objective: although hepatitis b vaccine immunogenicity is high, certain risk factors such as age, tobacco consumption, obesity and genetic background have been associated with low responsiveness to hbv vaccine. we aimed to evaluate the role of occult hepatitis b virus (hbv) infection in non-responder adults to hbv vaccine in a low endemic area for hbv. material and methods : a to...

Journal: :iranian journal of public health 0
m norouzi sa ghorashi f abedi a nejatizadeh b ataei r malekzadeh

background: hepatitis b virus (hbv) gene and protein variations are frequently been seen in chronic patients. the aims of study were to determine the genotypes as well as the patterns of variations distribution in chronically-infected patients from the central part of iran. methods: the surface gene was amplified, sequenced and subsequently aligned using international and national iranian datab...

Journal: :iranian journal of basic medical sciences 0
mehdi norouzi iranian national institute for genetic engineering and biotechnology, tehran, iran seyed ali ghorashi iranian national institute for genetic engineering and biotechnology, tehran, iran behrooz ataei infectious diseases and tropical medicine research center, isfahan university of medical sciences, isfahan, iran majid yaran infectious diseases and tropical medicine research center, isfahan university of medical sciences, isfahan, iran reza malekzadeh digestive disease research center, shariati hospital, tehran, iran seyed moayyed alavian baqiyatallah university of medical sciences, baqiyatallah research centre for gastroenterology and liver disease, tehran, iran

objective(s) the aim of this study was to characterize the hepatitis b virus surface protein genotypes and sequence variations among hepatitis b virus surface antigen (hbsag) positive chronic patients in hormozgan province, south of iran. materials and methods a total of 8 patients enrolled in this study. the surface gene was amplified and directly sequenced. genotypes and nucleotide/amino acid...

Journal: :Gut microbes 2021

The gut microbiota in the hepatitis B virus related acute-on-chronic liver failure (HBV-ACLF) is poorly defined. We aim to uncover characteristics of HBV-ACLF and other HBV associated pathologies. analyzed microbiome patients with or pathologies healthy individuals by 16S rRNA sequencing metagenomic fecal samples. 212 HBV-ACLF, 252 chronic (CHB), 162 HBV-associated cirrhosis (HBV-LC) 877 were r...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم پایه 1390

مطالعات بیشتر بیان نموده اند که ---- باعث ایجاد موتاسیون g to a-در ژنوم hbvمی گردد که حاصل آن حذف آنتی ژن hbeو کاهش hbv-dnaدر پلاسما می باشد.درهر حال به نظر می رسد که مکانیسم عملکرد a3gجلوگیری از بسته بندی hbv-dna در داخل ذرات ویروسی باشد.(4).همچنین xu et al پیشنهاد نموده است که apobec3 دآمینازها دارای نقشی در سرطانزایی hccاز طریق ایجاد موتاسیون ها در hbx(ناحیه همپوشان باbcp ) می باشند(5). علی...

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