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hepatitus b

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https://www.readbyqxmd.com/read/23104129/antibody-responses-to-routine-pediatric-vaccines-administered-with-13-valent-pneumococcal-conjugate-vaccine
#1
RANDOMIZED CONTROLLED TRIAL
Kristina A Bryant, Alejandra Gurtman, Douglas Girgenti, Keith Reisinger, Anthony Johnson, Michael W Pride, Scott Patterson, Carmel Devlin, William C Gruber, Emilio A Emini, Daniel A Scott
BACKGROUND: A 13-valent pneumococcal conjugate vaccine (PCV13) has been licensed in >100 countries to broaden coverage against pneumococcal disease. We assessed whether PCV13 interferes with immune responses to concomitantly administered routine pediatric vaccines. METHODS: Healthy US infants were randomly assigned in 2 studies to receive PCV13 or 7-valent PCV (PCV7) at age 2, 4 and 6 months concomitantly with diphtheria, tetanus, acellular pertussis, inactivated polio virus, hepatitis B and Haemophilus influenzae type b, and at age 12-15 months with measles, mumps, rubella, varicella and hepatitus A...
April 2013: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/20670484/hepatitus-b-virus-reactivation-in-hbv-dna-negative-and-positive-patients-with-hematological-malignancies
#2
COMPARATIVE STUDY
Münci Yağci, Zübeyde Nur Ozkurt, Zeynep Arzu Yeğin, Zeynep Aki, Gülsan Türköz Sucak, Rauf Haznedar
Reactivation of hepatitis B virus (HBV) is a frequent complication of chemotherapy (CT) in patients with HBsAg carriers. In this prospective study, we documented CT induced HBV reactivation risk in patients with hematological malignancies. HBV reactivation risk is influenced by baseline viral load. Therefore, we divided our study population into two groups according to HBV-DNA status. HBV-DNA negative patients (n=18) were treated with nucleoside analogues once HBV reactivation was observed. HBV-DNA positive patients (n=12) commenced lamivudine before the initiation of the CT...
August 2010: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/20128348/-seroprevalence-of-hepatitis-b-virus-and-human-immunodeficiency-virus-infection-in-a-population-of-multiply-transfused-patients-in-colombia
#3
MULTICENTER STUDY
Mauricio Beltrán, María Cristina Navas, María Patricia Arbeláez, Jorge Donado, Sergio Jaramillo, Fernando De la Hoz, Cecilia Estrada, Lucía del Pilar Cortés, Amalia de Maldonado, Gloria Rey et al.
INTRODUCTION: Although the transfusion of blood products is a common therapy, it carries risk of transmission of infections, especially hepatitus B virus (HBV) and human immunodeficiency virus (HIV). OBJECTIVE: As part of the blood safety initiative, the Pan American Health Organization supported studies to estimate the prevalence of human immunodeficiency virus and hepatitis B virus infection in Colombia. MATERIALS AND METHODS: Between February and September 2003, a cross sectional study examined 500 multiply-transfused patients at four hospital centers in the cities of Bogota and Medellin...
June 2009: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/19763277/hbx-mediated-migration-of-hbv-replicating-hepg2-cells-insights-on-development-of-hepatocellular-carcinoma
#4
Huixing Feng, Jianhua Zhang, Xi Li, Wei Ning Chen
Hepatitus B virus (HBV) is a major cause of the development of hepatpcellular carcinoma (HCC). One of the significant characteristics of tumor progression is cell migration which is reflective of cytoskeletal dynamics. The Rho GTPases contribute to a multiple cellular processes, including the cellular cytoskeletal reorganization and motility. It has been found that some Rho GTPases have oncogenic activity and can promote cancer cell invasion. Here we discuss one of the Rho GTPases, Rac1 can be activated by HBV replication and such activation results in the high motility of HBV-replicating cells...
2009: Journal of Biomedicine & Biotechnology
https://www.readbyqxmd.com/read/11002244/48-mer-synthetic-peptide-analogue-of-the-hepatitis-b-virus-a-determinant-induces-an-anti-hbs-antibody-response-after-a-single-injection
#5
J S Moynihan, F I D'Mello, C R Howard
An extended (48 amino acid) synthetic peptide analogue of the hepatitus B virus (HBV) S protein (HBsAg) 'a' determinant has been produced by using 9-fluorenylmethoxycarbonyl (fmoc) chemistry and a low substitution polystyrene resin as the solid phase support. This peptide (S121/48) elicited a sustained anti-peptide antibody response in BALB/c (H-2(d)) mice when immunised with Freund's complete adjuvant (FCA). Cross-reactive, anti-HBs antibodies were induced, directed against a significant proportion of the conformationally restrained epitope repertoire on the native HBsAg particles...
October 2000: Journal of Medical Virology
https://www.readbyqxmd.com/read/8553537/hnf3-binds-and-activates-the-second-enhancer-enii-of-hepatitis-b-virus
#6
M Li, Y Xie, X Wu, Y Kong, Y Wang
The basic functional unit of hepatitus B virus (HBV) enhancer II (ENII) is located within nt 1687-1774, which is defined as the B fragment in our previous papers. A major trans-acting factor binding site has been identified within the B fragment. The sequence corresponding to this binding site was named B2. In this paper, several point mutations were introduced into the B2 subunit by PCR-mediated site-directed mutagenesis. CAT analysis indicated that the TGTTTGTTT motif within the B2 subunit was critical for the activity of ENII...
December 20, 1995: Virology
https://www.readbyqxmd.com/read/3301881/quantitative-studies-of-the-hepatitis-b-viral-pre-s-proteins-lack-of-correlation-with-the-hbeag-status
#7
P S Hu, R L Carithers, V Fiorenza, D L Peterson
Radioimmunoassays for the determination of the relative amounts of hepatitus B viral pre-S proteins present in serum samples have been developed which utilize antibodies against synthetic peptides corresponding to the amino termini of these proteins. The assays were shown to be sensitive and specific. These assays have been used to examine hepatitis B surface antigen positive human plasma samples for the presence and relative amounts of pre-S proteins. Contrary to previously published data, it was found that there is no correlation between the presence of the pre-S proteins and the HBeAg status of the plasma, but that the ability to detect the pre-S proteins is only a function of the hepatitis surface antigen titre of the plasma...
May 1987: Journal of Virological Methods
https://www.readbyqxmd.com/read/2438023/subspecificity-determination-of-hbsag-by-radioimmunoassay
#8
R K Chaudhary, L Knelsen
A radioimmunoassay method for subtyping hepatitus B surface antigen (HBsAg) was developed. Polystyrene beads pretreated with glutaraldehyde and coated with monospecific anti-d or anti-y antibodies were used. The treatment of beads with glutaraldehyde significantly increased the sensitivity of the test. Subtyping by radioimmunoassay was found to be more sensitive than by the immunodiffusion method. Fifty-nine percent of the samples tested could be subtyped by RIA and only 32% by immunodiffusion. The technique has the added advantage of utilising a commercially iodinated anti-HBs...
February 1987: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/1847999/molecular-analysis-of-the-p53-alleles-in-primary-hepatocellular-carcinomas-and-cell-lines
#9
S Hosono, C S Lee, M J Chou, C S Yang, C H Shih
We have examined p53 oncogene/anti-oncogene alleles in 10 different human hepatoma cell lines and 18 primary hepatocellular carcinomas. The p53 allele in these hepatoma cell lines appears to be a frequent target of mutation as demonstrated by Southern and Northern blotting, immunoprecipitation and Western blot analysis. In general, the steady state level of p53 specific RNA or protein in these hepatoma cell lines is higher than in normal liver. However, in three out of ten cell lines, normal-sized p53 mRNA cannot be detected...
February 1991: Oncogene
https://www.readbyqxmd.com/read/1136331/an-immune-hemagglutination-procedure-with-very-high-sensitivity-applied-to-the-detection-of-hepatitis-b-antibody-and-antigen-and-immune-complex
#10
J H Pert, R L Verch
An immune agglutination procedure is described in which red cells are coated with antigen and agglutination is observed after a short incubation with antibody in reagent serum. Conversely, the cells may be coated with antibody and used to test for the presence of antigen. Treatment of the reagent serum with cobra venom factor results in inhibition, and there is a marked lo-s of sensitivity with cells pretreated with formalin or chromic chloride, suggesting that C3 and some type of reactive sites on the cells are required...
1975: Vox Sanguinis
https://www.readbyqxmd.com/read/925609/blocking-of-in-vitro-and-in-vivo-susceptibility-to-mouse-hepatitis-virus
#11
W Y Weiser, F B Bang
By pretreatment with concanavalin A (Con A) both in vivo and in vitro genetically susceptible mice and their cultured macrophages have been converted to animals and cells which are phenotypically resistant to mouse hepatitus virus (MHV). Con A at 1.0 mg/mouse decreased the mortality from 100% to less than 40% by inducing a prominent inflammatory response, increasing the number of macrophages in the virus inoculation site, and producing a population of macrophages not uniformly susceptible to the virus. In addition, mediators derived from Con A-treated spleen cells conferred resistance to normally susceptible syngeneic macrophages to 100 TCID50 of MHV...
November 1, 1977: Journal of Experimental Medicine
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