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Expression of the hepatitis B virus surface antigen gene in cell culture by using a simian virus 40 vector

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TLDR
A simian virus 40 recombinant carrying a fragment of DNA from hepatitis B virus is constructed carrying the same physical properties, antigenic composition, and constituent polypeptides as those found in the sera of patients with type B hepatitis.
Abstract
We have constructed a simian virus 40 recombinant carrying a fragment of DNA from hepatitis B virus. Cultured monkey kidney cells infected with this recombinant produce hepatitis B surface antigen. The antigen is excreted into the culture medium as 22-nm particles with the same physical properties, antigenic composition, and constituent polypeptides as those found in the sera of patients with type B hepatitis.

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Journal ArticleDOI

Production of hepatitis B virus particles in Hep G2 cells transfected with cloned hepatitis B virus DNA.

TL;DR: The Hep G2 cell line can support the assembly and secretion not only of several of the replicative intermediates of HBV DNA but also of Dane-like particles, and this in vitro system can now be used to study the life cycle ofHBV and the reaction of immunocompetent cells with cells carrying HBV.
Journal ArticleDOI

Human hepatitis B vaccine from recombinant yeast

TL;DR: This is the first example of a vaccine produced from recombinant cells which is effective against a human viral infection, and the purified antigen in alum formulation stimulated production of antibody in mice, grivet monkeys and chimpanzees.
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Increased DNA vaccine delivery and immunogenicity by electroporation in vivo.

TL;DR: Electroporation is shown to substantially increase delivery of DNA to cells, resulting in increased expression and elevated immune responses, and electroporation appears to overcome this barrier to transfection in vivo.
Journal ArticleDOI

Construction of poxviruses as cloning vectors: insertion of the thymidine kinase gene from herpes simplex virus into the DNA of infectious vaccinia virus

TL;DR: The herpes simplex virus thymidine kinase gene, as an insert in vaccinia virus, is transcribed in vivo and in vitro, and the fidelity of in vivo transcription into a functional gene product was detected by the phosphorylation of 5-[125I]iodo-2'-deoxycytidine.
Journal ArticleDOI

The herpes simplex virus amplicon: A new eucaryotic defective-virus cloning-amplifying vector

TL;DR: The design of the HSV amplicon system is based on the previous observation that cotransfection of cells with helper virus DNA and seed monomeric repeat units of HSV defective genomes results in the regeneration of concatemeric defective genomes composed of multiple reiterations of the seed repeats.
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