摘要:
This application provides a method to establish and construct cell lines expressing pathogens without destruction of the host cells. The invention allows for the formation of cell lines for the purpose of continuous expression, release, and harvesting of the pathogen and maintaining the consistency of the final biological product. Although the invention is intended for pathogen antigen expression, the invention allows for the production of any antigen by the described methods. The establishment of a chronically infected cell line can be used for reagent, diagnostic, quantification, or vaccine purposes. We have used the procedure to select for a host cell line that naturally adapts to HIV-1 replication without affecting the host cell's ability to survive. This allowed for the establishment of a chronic HIV-1 expressing cell line that continuously expresses HIV-1 particles.
摘要:
Polynucleotide encoding modified HIV Env polypeptides are disclosed. The Env polypeptides are modified so as to expose at least part of the CD4 binding region. Methods of diagnosis, treatment and prevention using the polynucleotides and polypeptides are also provided.
摘要:
The medical device by which a modified Human Immunodeficiency Virus or virus-like structure is used as a transport medium to carry a payload of a quantity of anti-viral drug molecules to T-Helper cells in the body. The modified Human Immunodeficiency Virus or virus-like structure makes contact with a T-Helper cell by means of the modified virus's exterior probes or virus-like structure's exterior probes. Once the exterior probes engage the T-Helper cell's receptors, the modified virus or virus-like structure inserts into the T-Helper cell the quantity of medically therapeutic anti-viral drug molecules it is carrying. The anti-viral drug molecules exhibit an anti-viral effect when present inside the T-Helper cells thus assisting in repelling an infection by the Human Immunodeficiency Virus and the use of such a device significantly lowers the occurrence of unwanted deleterious side effects.
摘要:
Non-infectious, retrovirus-like particles contain mutations to reduce gag-dependent RNA-packaging of the gag gene product, eliminate reverse transcriptase activity of the pol gene product, eliminate integrase activity of the pol gene product and eliminate RNase H activity of the pol gene product through genetic manipulation of the gag and pol genes. The corresponding nucleic acid molecules are described. The non-infectious, retrovirus-like particles have utility in in vivo administration including to humans and in diagnosis.
摘要:
A cell-free method for translation and assembly of viral capsid and capsid intermediates is disclosed for use in deconstructing an unknown virus and for screening for compounds that inhibit assembly of viral capsids for the unknown virus.
摘要:
A Human Immunodeficiency Virus (HIV-2) vector having a mutation within a packaging signal such that viral RNA is not packaged within an HIV-2 capsid is described. A further vector comprises an HIV-2 packaging signal and a heterologous gene capable of being expressed in the vector. These vectors may be co-transfected into a host cell to produce HIV-2 virus particles capable of expressing a heterologous gene.
摘要:
The present invention is directed toward methods for the production of non-infectious, replication-deficient, immunogenic human immunodeficiency virus (HIV)-like particles. These particles are prepared from a recombinant expression vector comprising a heterologous promoter operatively connected to a DNA molecule comprising a modified HIV genome devoid of the long terminal repeat (LTR) regulatory regions but containing at least the gag and pol genes in their natural genomic arrangement. This vector is introduced into mammalian cells to produce the particles of interest. These particles should prove useful in a number of diagnostic, virologic, and immunologic applications.
摘要:
This application provides a method to establish and construct cell lines expressing pathogens without destruction of the host cells. The invention allows for the formation of cell lines for the purpose of continuous expression, release, and harvesting of the pathogen and maintain the consistency of the final biological pro duct Although the invention is intended for pathogen antigen expression, the invention allows for the production of any antigen by the described methods. The establishment of a chronically infected celline can be used for reagent, diagnostic, quantification, or vaccine purposes. We have used the procedure to select for a host cell line that naturally adapts to HIV-1 replication without affecting the host cell's ability to survive. This allowed for the establishmentof a chronic HIV-1 expressing cell line that continuously expresses HIV-1 particles.
摘要:
The present invention provides a composition of matter, comprising: DNA encoding a viral Vpx protein fused to DNA encoding a protein. In another embodiment of the present invention, there is provided a composition of matter, comprising: DNA encoding a viral Vpr protein fused to DNA encoding a protein. The present invention further provides DNA, vectors and methods for expressing a lentiviral pol gene in trans, independent of the lentiviral gag-pol. A gene transduction element is optionally delivered to a lentiviral vector according to the present invention. Also provided are various methods of delivering a virus inhibitory molecule to a target in an animal. Further provided is a pharmaceutical composition.
摘要:
Dendritic cells and macrophages can process extracellular antigens for presentation by MHC-I molecules. HIV-1 epitopes derived from incoming virions are presented through the exogenous MHC-I pathway in primary human dendritic cells, and to a lower extent in macrophages, leading to cytotoxic T lymphocyte activation in the absence of viral protein neosynthesis. Exogenous antigen presentation required adequate virus-receptor interactions and fusion of viral and cellular membranes. These results provide new insights about how anti-HIV cytotoxic T lymphocytes can be activated and are useful for anti-HIV vaccine design.