Ultrastructural demonstration of hepatitis B virus production in a mouse model produced by hydrodynamic transfection. 2007

Masayoshi Konishi, and Hideaki Tanaka, and Masahiko Kaito, and Naoki Fujita, and Motoh Iwasa, and Yoshinao Kobayashi, and Yukihiko Adachi, and Shozo Watanabe
Center for Physical and Mental Health, Mie University, Mie, Japan. mkonishi@ab.mie-u.ac.jp

A mouse model of hepatitis B virus (HBV) infection produced by hydrodynamic injection of HBV DNA has been recently established. However, the ultrastructural demonstration of HBV particles in this mouse model has not as yet been reported. In our study, plasmid DNA containing wild-type HBV DNA was rapidly injected into 8-week-old female SCID mice via the tail vein. Serum levels of HBsAg were measured by ELISA kit. Intrahepatic HBV protein expression was detected by immunohistochemistry of HBcAg. Ultrastructural study of the serum samples was performed by transmission electron microscopy and immunogold electron microscopy. Serum HBsAg and intrahepatic HBcAg were detected in HBV DNA-injected mice for at least 14 days. Spherical and filamentous particles 22 nm in diameter and double-shelled Dane-like particles 42 nm in diameter were detected in the sera of mice. The ultrastructural features of these particles were identical to HBV particles observed in serum from chronic hepatitis B patients. These particles were confirmed to be HBV particles by immunogold electron microscopy. We conclude that our present HBV mouse model using hydrodynamic transfection of HBV DNA is appropriate for production of HBV virions including Dane particles. This mouse model may be useful for screening in vivo the efficacy of antiviral drugs.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008954 Models, Biological Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment. Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D004279 DNA, Viral Deoxyribonucleic acid that makes up the genetic material of viruses. Viral DNA
D004797 Enzyme-Linked Immunosorbent Assay An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed. ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D006514 Hepatitis B Surface Antigens Those hepatitis B antigens found on the surface of the Dane particle and on the 20 nm spherical and tubular particles. Several subspecificities of the surface antigen are known. These were formerly called the Australia antigen. Australia Antigen,HBsAg,Hepatitis B Surface Antigen,Antigen, Australia
D006515 Hepatitis B virus The type species of the genus ORTHOHEPADNAVIRUS which causes human HEPATITIS B and is also apparently a causal agent in human HEPATOCELLULAR CARCINOMA. The Dane particle is an intact hepatitis virion, named after its discoverer. Non-infectious spherical and tubular particles are also seen in the serum. Dane Particle,Hepatitis Virus, Homologous Serum,B virus, Hepatitis,Hepatitis B viruses,Particle, Dane,viruses, Hepatitis B
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014162 Transfection The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES. Transfections
D014779 Virus Replication The process of intracellular viral multiplication, consisting of the synthesis of PROTEINS; NUCLEIC ACIDS; and sometimes LIPIDS, and their assembly into a new infectious particle. Viral Replication,Replication, Viral,Replication, Virus,Replications, Viral,Replications, Virus,Viral Replications,Virus Replications

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