Results 11 to 20 of about 475,040 (341)
Immune cells use active tugging forces to distinguish affinity and accelerate evolution [PDF]
, 2022 Cells are known to exert forces to sense their physical surroundings for guidance of motion and fate decisions. Here, we propose that cells might do mechanical work to drive their own evolution, taking inspiration from the adaptive immune system. Growing evidence indicates that immune B cells - capable of rapid Darwinian evolution - use cytoskeletal ...
arxiv +1 more source
Clinical performance of a new hepatitis B surface antigen quantitative assay with automatic dilution
Kaohsiung Journal of Medical Sciences, 2015 Hepatitis B virus surface antigen (HBsAg) levels reflect disease status and can predict the clinical response to antiviral treatment; however, the emergence of HBsAg mutant strains has become a challenge.
Ta-Wei Liu +8 more
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Gut and Liver, 2017 Background/AimsWe aimed to clarify the association of hepatitis B surface antigen (HBsAg)/hepatitis B core antigen (HBcAg) with the disease status and treatment response in patients with chronic hepatitis B (CHB).Methods : We investigated 171 biopsy ...
Sun Young Yim +13 more
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Positive HBs antigen in the absence of hepatitis B virus infection [PDF]
Annales de Biologie Clinique, John Libbey Eurotext, 2019, 77 (5),
pp.543-548, 2019 French recommendations for the screening of hepatitis B virus (HBV) infection were updated in 2019 with the association of three markers: HBs Ag, anti-HBs Ab and anti-HBc Ab. These three markers allow identification of infected patients, vaccinated patients and patients who have been in contact with HBV. A positive HBs Ag is usually associated with HBV
arxiv +1 more source
International Journal of Preventive Medicine, 2018 Background: Scientists perceive drug users (DUs) as a high-risk population for hepatitis B virus (HBV) infection. Effective strategies aiming at the reduction of HBV infection can be depicted when its epidemiological status is clearly defined.
Roya Taleban +7 more
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The prevalence of hepatitis B virus markers among students of Shiraz University of Medical Sciences
Advanced Biomedical Research, 2021 Background: Protection against hepatitis B virus (HBV) is based on the presence of antibodies against hepatitis B surface antigen (HBsAg). Vaccination of newborns is the most effective means of prevention.
Razieh Dowran +4 more
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Scientific Reports, 2021 The predictive effect of quantitative anti-hepatitis B core on double-negative HBV DNA and RNA remains unstudied. We observed dynamic changes in this measure in chronic hepatitis B patients receiving entecavir for 10 years, evaluating its predictive ...
Xi Zhang +8 more
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Fluctuating fitness shapes the clone size distribution of immune repertoires [PDF]
PNAS 113 (2) 274-279 (2016), 2015 The adaptive immune system relies on the diversity of receptors expressed on the surface of B and T-cells to protect the organism from a vast amount of pathogenic threats. The proliferation and degradation dynamics of different cell types (B cells, T cells, naive, memory) is governed by a variety of antigenic and environmental signals, yet the observed
arxiv +1 more source
Current diagnosis of occult or cryptic hepatitis B [PDF]
Einstein (São Paulo), 2005 The present article presents a kind of hepatitis B in patients whodo not have the surface antigen (HbsAg) detectable in sera. It hasbeen described in different parts of the world and is known todayas “occult or criptic hepatitis B” and its importance has
João Renato Rebello Pinho
doaj
Proceedings, 2021 Introduction: Occult infections (OBIs) caused by hepatitis B virus (HBV) are detected by the presence of HBV DNA without surface antigens. The prevalence of HBsAg in general population of Pakistan is around 3%, but there is no data regarding the ...
Sameen Bint Ali +5 more
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