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Strana 1 od 21 výsledky
A recombinant vaccinia virus expressing hepatitis B virus middle surface protein. Restricted expression of HBV antigens in human diploid cells.
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Several vaccinia virus recombinants inducing the synthesis of the middle surface (M) protein of hepatitis B virus (HBV) were constructed. One of them, denoted v137, was examined in some detail. The virus replicated nearly to the same extent in various cell lines, viz. human embryo diploid fibroblast
ELECTROPHORETIC STUDIES ON ELEMENTARY BODIES OF VACCINIA.
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Electrophoretic studies were made on vaccine virus, collodion particles, and glass particles suspended in 0.01 molar buffer solutions at pH 7.9, in which the moving boundary method was used. In some experiments, uncoated particles were used; in others, particles were coated with proteins and then
Protein kinase and specific phosphate acceptor proteins associated with vaccinia virus cores.
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Incubation of purified vaccinia virus with gamma-(32)P-adenosine triphosphate resulted in the incorporation of (32)P into hot trichloroacetic acid-insoluble material. Enzymatic activity was completely dependent on the addition of divalent cations and was stimulated by nonionic detergents and
Evaluation of therapeutic interventions for vaccinia virus keratitis.
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BACKGROUND
Vaccinia virus keratitis (VACVK) is a complication of smallpox vaccination that can result in blindness. There are no Food and Drug Administration-approved treatments for VACVK, and vaccinia immunoglobulin (VIG) is contraindicated in isolated VACVK. We used a rabbit model of infection to
Inactivation of viruses during ultraviolet light treatment of human intravenous immunoglobulin and albumin.
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A comparison of ultraviolet (UV) irradiation of two wavelength ranges UVB (280-320 nm) and UVC (lower than 280 nm) showed that UVC in particular could very effectively inactivate, in intravenous immunoglobulin (IVIG) and albumin preparations, non-enveloped and non-acid labile model viruses (i.e.,
Multiple sclerosis and elevation of cerebrospinal fluid vaccinia virus antibody.
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Thirty percent of 33 patients with a clinical diagnosis of multiple sclerosis and an elevation of cerebrospinal fluid (CSF) immunoglobulin G/albumin ratio greater than 2 standard deviations above the mean had elevation of the CSF vaccinia neutralizing antibody titer. Elevated titers were found in 1
Two vaccinia virus recombinants expressing HBsAg with different concentration of A- and pre-S2 antigenic determinants.
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Comparative studies of two vaccinia virus (VV) recombinants expressing the hepatitis B virus (HBV) surface antigen (HBsAg) including the pre-S2 region (M-protein) showed that the L-pre-S2/15 recombinant expressed 5-fold more HBsAg as determined by the content of a-determinant than the recombinant
Expression and secretion of preS containing hepatitis B surface antigen in vaccinia virus system.
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The expression and secretion of preS containing hepatitis B surface antigen in vaccinia virus system was investigated. The human TK- 143 cells were infected with the recombinant vaccinia viruses vTMS-1 or vTLS-1. Cells infected with vTMS-1, which contains the preS2 + S gene, produced preS2
Selective synthesis and secretion of particles composed of the hepatitis B virus middle surface protein directed by a recombinant vaccinia virus: induction of antibodies to pre-S and S epitopes.
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Selective synthesis in mammalian cells of the hepatitis B virus middle surface (MS) protein, which is 55 amino acids longer than the major surface (S) protein, was achieved by using a recombinant vaccinia virus. The 33-kilodalton MS polypeptide was glycosylated and secreted as particles that
Enzyme-linked immunosorbent assay (ELISA) and blocking with bovine serum albumin (BSA)--not all BSAs are alike.
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The enzyme-linked immunosorbent assay (ELISA) is an extremely common and powerful laboratory technique for detecting proteins by antibodies. Researchers frequently use bovine serum albumin (BSA) as a blocking agent to prevent non-specific binding of antigens and antibodies to the microtiter well.
Rapid and Effective Virucidal Activity of Povidone-Iodine Products Against Middle East Respiratory Syndrome Coronavirus (MERS-CoV) and Modified Vaccinia Virus Ankara (MVA).
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BACKGROUND
Since the first case of Middle East Respiratory Syndrome coronavirus (MERS-CoV) infection was reported in 2012, the virus has infected more than 1300 individuals in 26 countries, and caused more than 480 deaths. Human-to-human transmission requires close contact, and has typically
Peptide immunogen mimicry of putative E1 glycoprotein-specific epitopes in hepatitis C virus.
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Hepatitis C virus (HCV) accounts for most cases of acute and chronic non-A and non-B hepatitis with serious consequences that may lead to hepatocellular carcinoma. The putative envelope glycoproteins (E1 and E2) of HCV probably play a role in the pathophysiology of the virus. In order to map the
A brief overview of the new vaccines against hepatitis B virus infection: immunogenic gene products and peptide analogues of antigenic epitopes.
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Immunologically recognizable antigens encoded by hepatitis B virus (HBV) DNA include: (i) the surface antigen (HBsAg), (ii) the pre-S antigen, (iii) the X antigen (HBxAg) and (iv) the core/e antigens (HBcAg/HBeAg). Each one of these antigens or their combination may be prepared for the next
Breaking tolerance leads to autoantibody production but not autoimmune liver disease in hepatitis B virus envelope transgenic mice.
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Hepatitis B virus (HBV) transgenic mice containing the HBV envelope open reading frame under the transcriptional control of the mouse albumin promoter express hepatitis B surface Ag (HBsAg) in all of their hepatocytes and secrete HBsAg (10 to 40 ng/ml) into the circulation. Because these transgenic
Efficient removal of viruses by a novel polyvinylidene fluoride membrane filter.
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Virus removal by a novel filter (Ultipor VF DV50), comprising three layers of PVDF membrane, has been evaluated by infectivity studies using a range of viruses and conditions. The filter was able to remove at least 6 log of various viruses, i.e. Sindbis and Semliki Forest (40-70 nm), herpes simplex
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