32 results about "Cd4 receptors" patented technology

Disclosed is a method of directing a cellular immune response against an HIV-infected cell in a mammal involving administering to the mammal an effective amount of therapeutic cells which express a membrane-bound, proteinaceous chimeric receptor comprising (a) an extracellular portion which includes a fragment of CD4 which is capable of specifically recognizing and binding the HIV-infected cell but which does not mediate HIV infection and (b) an intracellular portion which is capable of signalling the therapeutic cell to destroy the receptor-bound HIV-infected cell. Also disclosed is a second method of treating HIV in a mammal involving administering to the mammal an effective amount of therapeutic cells expressing a membrane-bound, proteinaceous chimeric receptor comprising an extracellular portion which includes a fragment of CD4 which is capable of specifically recognizing and binding the HIV-infected cell but which does not mediate HIV infection. Also disclosed are cells which express the chimeric receptors and DNA and vectors encoding the chimeric receptors.

Disclosed is a method of directing a cellular immune response against an HIV-infected cell in a mammal involving administering to the mammal an effective amount of therapeutic cells which express a membrane-bound, proteinaceous chimeric receptor comprising (a) an extracellular portion which includes a fragment of CD4 which is capable of specifically recognizing and binding the HIV-infected cell but which does not mediate HIV infection and (b) an intracellular portion which is capable of signalling the therapeutic cell to destroy the receptor-bound HIV-infected cell. Also disclosed are cells which express the chimeric receptors and DNA and vectors encoding the chimeric receptors.

A method for preventing infection of helper T and other target cells by human immunodeficiency virus type 1 (“HIV-1”) and for preventing or treating acquired immunodeficiency syndrome (“AIDS”) by exposing target cells to a synergistic combination of at least one attachment inhibitor and at least one fusion inhibitor. The attachment inhibitors are compounds that bind to the CD4 receptor on target cells or that bind to gp120 on HIV-1, e.g., antibodies, and the fusion inhibitors compounds that interact with gp41 to inhibit or prevent its interaction with target cells, e.g., pentafuside.

A complex comprising a starch and an active anti-HIV-1 or anti-HIV-2 ingredient of pomegranate juice that is adsorbed on the starch when the starch is in a water insoluble form. The complex inhibits HIV-1 or HIV-2 infection and blocks the binding of HIV-1 or HIV-2 to the CD4 receptor and the CCR5 and CXCR4 coreceptors. The complex is used in a method of preventing HIV-1 or HIV-2 infection comprising administering to a mucous membrane of a human a pharmaceutically effective anti-HIV-1 or anti-HIV-2 amount of the complex.

The present invention relates to an infectious particle having a surface displaying a ligand binding to a CD4 receptor for selectively infecting dividing CD4⁺ cells, said particle comprising: (a) one or more structural proteins, and (b) a vector containing a gene of interest functional in a CD4⁺ cell, said gene of interest encoding a Forkhead box protein 3 or a protein inducing expression of Forkhead box protein 3 in the CD4⁺ cell.

A clinic human experiment of HIV envelope protein gp120 or gl160 antigen vaccine proves that it can not prevent the infection of HIV to human body, but can be used to research and screen the anti-HIV therapeutic vaccine and the vaccine for preventing the infection of HIV to human body.

The invention discloses pseudoviruses for non-CD4 receptors of an HIV-1 CRF_BC recombinant strain and application of the pseudoviruses. The invention successfully constructs the pseudoviruses CH120N197S and CH110N197S for the non-CD4 receptors of the HIV-1 CRF_BC recombinant strain, and the two pseudoviruses not only can infect a target cell with the CD4 receptor, but also can infect a target cell without the CD4 receptor. The infectivity of the pseudovirus CH120N197S infecting the target cell without the CD4 receptor is 73/100 of that of the pseudovirus CH120N197S infecting the target cell with the CD4 receptor and is higher than that of a reported pseudovirus e7adaN197S (60/100). The successfully-constructed pseudoviruses for the non-CD4 receptors of the HIV-1 CRF_BC recombinant strain greatly enrich the main HIV-1 pseudovirus resources in China so as to have very important significance for studying the structural characteristics of cell membrane proteins of the CRF_BC recombinant strain serving as a main epidemic strain in China and developing an HIV vaccine for the CRF_BC recombinant strain in China.

a method is provided for detecting a presence of HIV virus in a sample comprising: taking a culture of recombinant cells which (a) are capable of cell division, (b) express CD4 receptor and one or more additional cell surface receptors necessary to allow the HIV virus to infect, (c) enable the HIV virus to replicate and infect the noninfected cells in the cell culture, and (d) comprise a reporter sequence introduced into the recombinant cells comprising a reporter gene whose expression is regulated by a protein specific to HIV viruses which is expressed from a genome of an HIV virus upon infection of the recombinant cell by the HIV virus; contacting the cell culture with a sample to be analyzed for the presence of HIV virus in the sample; and detecting a change in a level of expression of the reporter gene in cells in the recombinant cell culture. The method can be used to detect the presence of HIV virus in a sample, detect the presence of different strains of HIV virus in a sample, detect HIV drug resistance in a sample, determine what combination of one or more anti-HIV agents would be effective in treating a patient, and screen compositions for anti-HIV activity.

The present invention provides methods for inhibiting the ability of HIV genes products to bind to the cytoplasmic domain of a CD4 receptor. This domain is necessary to the ability of the HIV Nef and Vpu gene products to connect the CD4 receptor to cellular degradation pathways. The present invention provides a method for introducing a modified CD4 receptor into a cell, and inhibitors thereof, to treat HIV infection and CD4 receptor down-modulation. The present invention is also directed to a method for screening compounds for the ability to inhibit CD4 down-modulation.

Pharmaceutical composition for treating/preventing HIV comprising (i) a polynucleotide encoding HIV envelope protein and (ii) a polynucleotide encoding CD4 receptor protein or; (i) a polynucleotide encoding HIV envelope protein and (ii) a CD4 receptor protein or; a fixed cell expressing an HIV envelope protein complexed with a CD4 receptor protein. Also disclosed are pharmaceutical compositions for treating/preventing HIV comprising an antibody immunospecific for a fixed cell expressing an HIV envelope protein complex with a CD4 receptor protein. The binding of the CD4 to the HIV envelope protein, i.e. gp120, exposes hidden epitopes that may be used as targets in immunotherapy; the presentation of the gp120 and CD4 in the present forms is said to overcome problems with prior art soluble gp120-CD4 complexes.

In order to accurately and reliably quantitate HLE on the plasma membranes of the lymphocytes and mononuclear phagocytes, a test sample containing the lymphocytes and mononuclear phagocytes is initially treated with a first antiserum specific for CD4 receptors on the plasma membrane or with a second antiserum specific for chemokine receptors on the plasma membrane. Once the CD4 or chemoline receptors have been rendered non-reactive (competitive) relative to the HLE receptors (also “binding sites”) on the plasma membrane, the test sample is contacted with an immunoreagent specific for interaction with one or more of the HLE receptors on the plasma membranes of the lymphocytes and mononuclear phagocytes. The immunoreagent forms a complex with the HLE binding sites and produces a characteristic physical change in the lymphocytes and mononuclear phagocytes that can be monitored by anyone of a number of standard techniques, (e.g., confocal laser scanning microscopy and flow cytometry).

This invention relates to a conjugated molecule comprising a peptide derived from the CD4 receptor coupled to an organic molecule by means of a linker as well as a process for its preparation. Said organic molecule comprises a 13 amino acid anionic polypeptide. Such a conjugated molecule can be used in antiviral treatment, namely in the treatment of AIDS.

The invention relates to the technical field of biological medicines, in particular to a nucleic acid construct for AIDS gene therapy, which comprises a plurality of polynucleotides for coding single-chain variable fragments of an anti-AIDS neutralizing antibody and polynucleotides for coding an immune globulin Fc fragment. The single-chain variable region fragment of the anti-AIDS neutralizing antibody comprises a single-chain variable region fragment capable of being specifically combined with HIV and a single-chain variable region fragment capable of being specifically combined with a CD4 receptor. The construction body can be used for gene therapy of AIDS caused by HIV virus infection, can be used for expressing an amphiphilic/polyphilic neutralizing antibody with broad-spectrum and high-efficiency neutralizing activity in vivo and in vitro, and can be used for clinical research and new drug research and development of AIDS gene therapy drugs delivered by recombinant viruses or non-viral vectors.

Methods and reagents for the capture of primary HIV are provided. A cell line expressing CCR5, CXCR4 and CD4 receptors binds and is infected by primary HIV. The cell line contains a marker gene sequence, the marker gene sequence expressed in near linear quantities over at least two orders of magnitude in response to HIV infection. Primary HIV is amplified to create a primary virus stock through insertion of an amplicon gene into the receptor expressing cell line. HIV amplification occurs rapidly and is operative with noninfectious HIV through amplification in the presence of an infectivity complement. The present invention is useful in determining host HIV titer, drug sensitivity, HIV amplification, gene sequencing and co-receptor utilization.