46 results about "Cd4 t cell" patented technology

Regulatory T cells (Treg) limit autoimmunity but can also attenuate the magnitude of anti-pathogen and anti-tumor immunity. Understanding the mechanism of Treg function and therapeutic manipulation of Treg in vivo requires identification of Treg selective receptors. A comparative analysis of gene expression arrays from antigen specific CD4+ T cells differentiating to either an effector/memory or a regulatory phenotype revealed Treg selective expression of LAG-3 (CD223), a CD4-related molecule that binds MHC class II. LAG-3 expression on CD4+ T cells correlates with the cells' in vitro suppressor activity, and ectopic expression of LAG-3 on CD4 T cells confers suppressor activity on the T cells. Antibodies to LAG-3 inhibit suppression both in vitro and in vivo. LAG-3 marks regulatory T cell populations and contributes to their suppressor activity.

Disclosed herein is a system and method for producing T cells from stem cell populations. Specifically exemplified herein is a culture system and method that produces CD4 cells and/or T cell subtypes from a CD4 lineage using a sample of hematopoietic stem cells. Adult hematopoietic precursor/stem cells (HPC) are progenitors to all lineages of immune cells. There has been limited success in generating functional CD4 T cells with this convenient culture system. Also disclosed herein is a novel stromal cell line expressing DL1, interleukin-7 (IL-7), and FMS-like tyrosine kinase 3 ligand (Flt3-L). This improved culture system can greatly facilitate the study of late T cell development and enables immunotherapeutic applications.

The present invention provides a recombinant pox virus composition comprising a nucleic acid sequence encoding chemokines as costimulatory molecules. The present invention further provides a host cell, a host animal, and a pharmaceutical composition comprising the recombinant pox virus composition. Also provided is a method for treating or preventing a neoplasm or infectious disease in a subject, using the pox virus composition and/or an SLC agent. Additionally, the present invention provides a method for promoting the proliferation of a CD4 T cell, comprising administering to the cell an SLC agent in an amount effective to directly promote the proliferation of the cell. Finally, the present invention provides a method for treating or preventing a neoplasm or infectious disease in a subject using cultured CD4 T cells.

Methods and compositions for treatment of human immunodeficiency virus (HIV) infections have been developed which dampen immune activation with a bias more on the CD4 T cells relative to the CD8 T cell response, inhibit HIV replication, reactivate latent HIV, and inhibit infection of cells by HIV. Pushing latent HIV into active infections with hindrance of cell infection by the reactivated HIV can substantially reduce the number of cells infected with HIV and the viral load of HIV, which is not achieved using just the combination of ART and compounds which activate latent HIV. The methods involve administering to an HIV-infected subject three or more compounds which collectively dampen immune activation with a bias more on the CD4 T cells relative to the CD8 T cell response, inhibit HIV replication, reactivate latent HIV, and inhibiting infection of CD4 T cells by HIV.

Provided herein are compositions and methods for the treatment of a patient having an HIV-1 infection and/or AIDS. More specifically this invention provides treatment of an HIV-1 infection and/or AIDS using small molecule compounds, such as inhibitors for the activation and/or activity of caspase-1. Inhibitors for the activation and/or activity of caspase-1 also prevent the cell death of CD4 T-cells in a population of CD4 T-cells comprising HIV-1 infected CD4 T-cells and uninfected CD4 T-cells. In addition, caspase-1 inhibitors inhibit inflammation, and pyroptosis.

The present invention relates to compositions and methods for modulating the expression and/or activity of PTEN in T cells, regulatory T cells, and CD4 T cells. The manipulation of PTEN provides a means for regulating an immune response.

The invention provides methods of identifying naïve T cells by expression of PTK7.

The invention belongs to the field of biomedicine and discloses application of DC-CIK cells in preparation of a medicine used for resisting HIV infection. Through a lot of experiments, the inventor discovers that when CIK cells impacted by HIV and DC cells are co-cultured, the CIK cells can obviously promote maturation of the DC cells. When the DC and CIK cells are combined for use, the DC and CIK cells have mutual promotion presentation and a function for killing cells infected by HIV. After 30 days of the DC-CIK cell infusion, the number of CD4T cells of a HIV infector is obviously increased, the killing function of NK (Natural Killer) and CIK cells is enhanced, and HIV viral load is obviously restrained. Thus, kill cells induced by co-cultured dendritic cells and cytokines can be applied to the preparation of the medicine used for resisting HIV infection.

A method for modulating an immune response by activating or inhibiting dopaminergic neurons in the Ventral Tegmental Area (VTA) is provided. Modulation is achieved by modulating the activity, the abundance or both of: a natural killer cell, a CD8 T-cell, a CD4 T-cell, a B-cell, a dendritic cell, a macrophage, a granulocyte, or their combination.

Disclosed are methods of making a genetically cell that expressed FOXP3 and methods of treatment. In some embodiments, the method can providing a first nucleotide sequence, wherein the first nucleotide sequence comprises a coding strand, the coding strand comprising one or more regulatory elements and a FOXP3 gene or portion thereof providing a nuclease and performing a gene editing process on the first nucleotide sequence, which edits said one or more regulatory elements, and optionally edits the FOXP3 gene or portion thereof. Methods of treating a subject suffering from an autoimmune disease and subjects suffering the effects of organ transplantation are also provided.

The invention provides a TCR-T cell for killing tumors, which is characterized in that the TCR-T cell is a T cell carrying a tumor antigen TCR, TCR in the TCR-T cells is derived from any one or more of the following T cells: 1) CD4T cells for expressing one or more of genes such as TNFRSF18, CXCL13, TNFRSF4, TNFSF8, ENTPD1, ACP5, LAYN, TNFRSF9, CTLA4, CD200 and TIGIT in tumors; and 2) a CD8T cellfor expressing one or more of the genes of TNFRSF18, CXCL13, CXCR6, GALNT2, ENTPD1, ACP5, HAVCR2, LAYN, TNFRSF9, CTLA4 and CD109 in the tumor. The TCR-T cell provided by the invention can be effectively applied to treatment of tumors, especially immunotherapy.

The present invention relates to the discovery of novel T cell epitopes of the human prostatic acid phosphatase (PAP) protein that is promiscuous for at least 15 different HLA-DR alleles. The invention also relates to compositions that contain one of the novel epitopes or a fusion peptide of such an epitope and a heterologous polypeptide. Further disclosed herein is the use of the epitopes or their fusion peptides, and compositions containing the epitopes or their fusion peptides.

Compositions and methods are provided for diagnosis and treatment of rheumatoid arthritis. Defects in T cell receptor signaling lower the activation threshold of RA T cells, thus predisposing for a failure in maintenance of immune tolerance. Overexpression of B-Raf and/or K-Ras in CD4 T cells lowers the threshold to respond to TCR triggering in the absence of costimulation and increases responses to citrullinated peptides and other autoantigens.

The present application discloses proteins or peptides and methods of using such proteins or peptides to evaluate the immune status of a patient. In one embodiment, proteins or peptides may be used to detect endogenous calnexin specific CD4 T cells. In one preferred embodiment, the proteins or peptides may comprise peptide-MHCII tetramers (pMHC tetramers).

Cytotoxic T lymphocytes (CTLs) specific for antigenic peptides derived from IgE molecule can be generated in vitro by stimulating resting naive CD8 T cells with IgE peptides presented by artificial antigen presenting cells. The IgE specific CTLs lyse the target cells loaded with IgE peptides in vitro and inhibit antigen specific IgE response in vivo. In addition, adoptive transfer of the IgE specific CTL to an asthmatic mouse model can inhibit the development of lung inflammation and airway hypersensitivity. IgE specific CTL provides a treatment for allergic asthma and other IgE-mediated allergic diseases. Antigenic peptides identified from non-tumor self-antigens induce specific cytotoxic T lymphocyte (CTL) in vitro. The CTL induced by peptides identified from CD40L can kill activated CD4 T cells. In vitro generated CTL specific for CD40L inhibit CD4-dependent antibody responses of all isotypes in vivo. In contrast, CTL induced by antigenic peptides derived from IgE specifically inhibit IgE responses, and adoptive transfer of CD40L-specific CTL to NOD mice at early age delay the development of diabetes in NOD mice. In vitro generated CTL specific for non-tumor self-antigens expressed on activated CD4 T cells regulate immune responses in vivo.

The present invention relates to a CD4 T cell vaccine and a use thereof, and provides a CD4 T cell vaccine which can increase intracellular viability and effectively induce an antigen-specific cytotoxic T lymphocyte (CTL) response.

The present invention relates to the discovery of novel T cell epitopes of the human HER-2/Neu protein that is promiscuous for at least 25 different HLA-DR alleles. The invention also relates to compositions that contain one of the novel epitopes or a fusion peptide of such a epitope and a heterologous polypeptide. Further disclosed herein is the use of the epitopes or their fusion peptides, and compositions containing the epitopes or their fusion peptides.

The invention provides a recombinant vaccinia virus capable of simultaneously expressing an extracellular segment of a new coronavirus S gene and a full-length segment of an N gene, and also provides application of an immunization kit containing the recombinant vaccinia virus, a DNA carrier capable of expressing the extracellular segment of the new coronavirus S gene and a DNA carrier capable of expressing the full-length segment of the N gene of the new coronavirus as a composite vaccine. According to the invention, experimental animals can be induced to generate specific CD4 and CD8 cell reactions aiming at new coronavirus N, S1 and S2 proteins by sequentially inoculating the three vaccines in the composite vaccine provided by the invention in 0, 2 and 4 weeks, the CD8T cell reaction is higher than the CD4T cell reaction, the induced T cell immunity can last for at least 3 months, and the combined antibody lasts for 6 months and is not obviously reduced, so that tt is shown that the composite vaccine can induce lasting immune response to SARS-CoV-2, and a neutralizing antibody induced by the vaccine has cross reaction activity and can prevent infection of various variants of the new coronavirus to a certain extent.

The present invention relates to an adenoviral vector capable of encoding a virus-like particle (VLP), the VLP displaying an inactive immune-suppressive domain (ISD). The vaccine of the invention shows an improved immune response from either of both of the response pathways initiated by CD4 T cells or CD8 T cells.

The present disclosure provides, inter alia, methods of treating generalized pustular psoriasis (GPP) by administering an effective amount of a Chemokine Receptor 6 (CCR6) antagonist and/or a C-X-C motif chemokine receptor 2 (CXCR2) antagonist. Also provided herein are methods of modulating dysregulated IL-36 signaling in a subject in need thereof and methods of reducing neutrophil, inflammatory dendritic cell (iDC), and/or CD4 T cell accumulation in a subject in need thereof, said methods, include dministering an effective amount of a Chemokine Receptor 6 (CCR6) antagonist and/or a C-X-C motif chemokine receptor 2 (CXCR2) antagonist. In some embodiments, the CCR6 and/or CXCR2 antagonist has the formula:

The present invention relates to recombinant acetylcholine receptor polypeptides recognized by CD4 T cells of a myasthenia gravis patient and compositions for the treatment of myasthenia gravis containing the same as an effective ingredient, more precisely, recombinant acetylcholine receptor polypeptides deficient in B cell epitope, recombinant acetylcholine polypeptides in which two or more T cell epitopes are fused, a composition for the treatment of myasthenia gravis containing the above recombinant polypeptides as an effective ingredient and a treatment method for myasthenia gravis using the composition. The composition containing one or more recombinant polypeptides above can be effectively used as a myasthenia gravis specific therapeutic agent or immunomodulator without side effects.