812 results about "Cellular immunity" patented technology

A nanoparticle-based delivery system and methods for its use are disclosed. In one aspect, a nanoparticle-based delivery system comprising at least one molecule such as proteins, DNA/RNA or fragments thereof, carbohydrates, enzymes, chemicals, virus cells, bacteria, parts of a virus, parts of a bacteria, parts of a cell, part of a tissue, or a combination of one or more of these, which shall be referred to as immunogens, are chemically or physically combined with water soluble nanoparticles which, when administered to a living system, is capable of eliciting a desired immunological response. More particularly, the invention relates to nanoparticle-based delivery systems that are specifically engineered to enhance humoral or cellular immune response without the use of adjuvants.

Vaccines that target one or more antigens to a cell surface receptor improve the antigen-specific humoral and cellular immune response. Antigen(s) linked to a domain that binds to a cell surface receptor are internalized, carrying antigen(s) into an intracellular compartment where the antigen(s) are digested into peptides and loaded onto MHC molecules. T cells specific for the peptide antigens are activated, leading to an enhanced immune response. The vaccine may comprise antigen(s) linked to a domain that binds at least one receptor or a DNA plasmid encoding antigen(s) linked to a domain that binds at least one receptor. A preferred embodiment of the invention targets HIV-1 env antigen to the CD40 receptor, resulting in delivery of antigen to CD40 positive cells, and selective activation of the CD40 receptor on cells presenting HIV-1 env antigens to T cells.

The present invention relates generally to adjuvants, and in particular to methods and products utilizing a synergistic combination of immunostimulatory oligonucleotides having at least one unmethylated CpG dinucleotide (CpG ODN) and a non-nucleic acid adjuvant. Such combinations of adjuvants may be used with an antigen or alone. The present invention also relates to methods and products utilizing immunostimulatory oligonucleotides having at least one unmethylated CpG dinucleotide (CpG ODN) for induction of cellular immunity in infants.

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.

This invention discloses immunostimulatory combinations of Tumor Necrosis Factor Receptor Superfamily (TN-FRSF) agonists, Toll-Like Receptor (TLR) agonists, “domain present in NAIP, CIITA, HET-E, TP-I (NACHT)-Leucine Rich Repeat (LRR)” or “NLR” agonists, RIG-I-Like Helicase or “RLH” agonists, purinergic receptor agonists and cytokine/chemokine receptor agonists, together with delivery methods. The combinations, when used alone at the site of pathology, provide immunostimulation that induces host humoral and cellular immunologic responses to eliminate pathogens or neoplasms. Alternatively, when the combinations are used with a defined antigens, these combinations can induce focused humoral and cellular immunologic responses useful as prophylactic and/or ameliorative therapeutic modalities for infections and the treatment of neoplastic disorders.

Disclosed is a method of directing a cellular response in a mammal by expressing in a cell of the mammal a chimeric receptor which causes the cells to specifically recognize and destroy an infective agent, a cell infected with an infective agent, a tumor or cancerous cell, or an autoimmune-generated cell. Also disclosed are cells which express the chimeric receptors and DNA encoding the chimeric receptors.

Adjuvant combinations comprising at least one microbial TLR agonist such as a whole virus, bacterium or yeast or portion thereof such a membrane, spheroplast, cytoplast, or ghost, a CD40 or 4-1BB agonist and optionally an antigen wherein all 3 moieties may be separate or comprise the same recombinant microorganism or virus are disclosed. The use of these immune adjuvants for treatment of various chronic diseases such as cancers and HIV infection is also provided.

The present invention comprises compositions, methods, and devices for creating an stimulating an antigen-specific dendritic cell immune response. Devices and methods provide prophylactic and therapeutic immunity to subjects against cancer and infectious agents.

The invention provides, inter alia, immunogenic compositions comprising a first antigen, at least two adjuvants, wherein a first adjuvant comprises a polymer derived from poly(lactides) and/or poly(lactide-co-glycolides), and wherein a second adjuvant comprises an imidazoquinoline, wherein said first antigen is encapsulated within, adsorbed or conjugated to, co-lyophilized or mixed with said first adjuvant, and a pharmaceutically acceptable excipient, wherein said composition elicits a cellular immune response when administered to a vertebrate subject. The invention also provides methods of producing immunogenic compositions, methods for producing a cytotoxic-T lymphocyte (CTL) response in a vertebrate subject, and methods of immunization.

Provided herein are cells, vectors and viruses in association with a mutant polypeptide that has emerged in response to a therapeutic or prophylactic agent; compositions comprising such cells, vectors and viruses and methods for their use in eliciting an immune response to the mutant polypeptide. In some examples, the immune response is a cellular immune response.

Disclosed herein are compositions and methods for eliciting immune responses against antigens. In particular embodiments, the compounds and methods elicit immune responses against antigens that are otherwise recognized by the host as “self” antigens. The immune response is enhanced by presenting the host immune system with a chimeric antigen comprising an immune response domain and a target binding domain, wherein the target binding domain comprises a xenotypic antibody fragment. By virtue of the target binding domain, antigen presenting cells take up, process, and present the chimeric antigen, eliciting both a humoral and cellular immune response.

The invention belongs to the field of molecular biology and relates to a high-activity T-cell promoter and an application thereof. Particularly, the high-activity T-cell promoter comprises an element 1 and an element 2, wherein the element 1 is an EF1 alpha promoter and/or an EF1 alpha promoter containing an intron; and the element 2 is any one or more of an mCMV promoter, an hCMV promoter and a CD3e promoter. The high-activity T-cell promoter provided by the invention can be used for efficiently expressing a foreign gene in a T cell, has a stable sequence and is free from sequence loss during the transfer process of a prokaryotic cell and a eukaryotic cell. The high-activity T-cell promoter is applicable to driving the high-efficiency expression of the foreign gene, especially a full-length antibody gene, in the T cell during the process of adoptive cellular immunotherapy.

The invention discloses preparation and application of exosome secreted by human derived blood or mesenchymal stem cell. The preparation process of exosome comprises: extracting mesenchymal stem cells from health-human body blood or a stem cell culture supernatant, performing in-vitro culture and amplification, and utilizing means such as low-temperature separation, purification and the like to prepare high-purity high-bioactivity exosome. The blood or mesenchymal stem cell secreted exosome is added into medicines, health-care products and cosmetics according to ratios for developing of products with bioactivity, is capable of effectively regulating and controlling body cell signal transduction, activating cell regeneration, enhancing health cell proliferation and differentiation capacity, further regulating physiologic restoration or removing damaged, pathologic and aged cells of a body, fundamentally changing body physiologic functions, and helping to generate anti-tumor treatment effect by adjusting cellular immunity. The blood or mesenchymal stem cell secreted exosome is applicable to fields of medical science, health care and beauty treatment, and has wide application prospect.

The invention relates to the field of protein, and specifically relates to a milk-derived bioactive polypeptide LPLP with in-vitro antioxidant activity and immunity improving function. An amino acid sequence of the polypeptide is Leu-Pro-Leu-Pro. In-vitro anti-oxidation and in-vitro immune function promotion experiments prove that the polypeptide LPLP has good anti-oxidation bioactivity and cellular immunity promotion activity. With the polypeptide LPLP, free radicals in bodies can be removed, such that harm of the free radicals to human bodies can be reduced; and the bioactive polypeptide LPLP can enhance macrophage phagocytic function, can improve body capacity for resisting external pathogens, can reduce body incidence rate, and does not cause body immunological rejection. The polypeptide has important significance in developing dairy products, health products and medicines with anti-oxidation function and immunity enhancing function.

The invention provides a vaccine composition containing an antigen for inducing cellular immunity, comprising at least one first cellular immunity induction promoter.

The invention discloses a preparation method of human cytokine-induced killer cells, comprising the following steps: coating a cell culture flask with a coating buffer containing effective amount of fusion protein and human CD3 monoclonal antibody before culturing precursor cells of human CIK cells, and adding the human CD3 monoclonal antibody in the whole process of inducing and culturing the human CIK cells, wherein the fusion protein is human intercellular adhesion molecule-1 functional domain and human fibronectin functional domain fusion protein, and the concentration of the human CD3 monoclonal antibody in the cell culture solution is lower than the concentration of the human CD3 monoclonal antibody in the coating buffer. According to the invention, ex-vivo expansion efficiency of peripheral blood mononuclear cells and the proportion of CD3/CD56 double positive cells in the CIK cells are significantly raised, the cytotoxicity activity of the CIK cells is enhanced, thus the effect of cellular immunity treatment is raised.

The invention provides human interleukin interleukin-2 (IL-2)/Fc fusion protein. The human IL-2 of the fusion protein comprises all sequences of a human IL-2 extracellular region; the Fc fragments comprise a hinge region, a CH2 region and a CH3 region; the human IL-2/Fc sequences are fused directly or through a connection sequence; and the Fc fragments are human or animal IgG, IgM, IgD and IgA orsubtypes thereof. The ADCC and CDC effective factor action can be eliminated, and in addition, the human IL-2/Fc fusion protein has the compatibility with a recombinant IL-2 receptor so that the half-life period is obviously prolonged and also has all the biological activity of the IL-2 receptor. The IL-2/Fc obviously improves the humoral immune response stimulated by the hepatitis B vaccine and the immunity of the CD8+T cells targeted to the hepatitis B vaccine. Moreover, the balance immune (suppression) of the effective T cells and the regulatory t cells can be adjusted under the action of the cyclosporine A so that the pancreatic islet transplantation immune tolerance is induced.

An exemplary embodiment providing one or more improvements includes feeding animals with probiotic microbes encapsulated in a mixture of xanthan gum and chitosan, or in gelatin, specifically Pediococcus acidilactici and Saccharomyces boulardii. Such encapsulation protects the viability of the probiotic microbes against unfavorable temperatures. An exemplary embodiment providing one or more improvements includes methods of using viable probiotics in therapy of birds and mammals infected with infectious diseases. Probiotics acted as adjuvants in stimulating antibody reaction and stimulated a cellular immunity response. In particular, probiotics were shown to reduce the number of viable oocytes from fecal samples, stimulate antibody production, and stimulate of proliferation of splenocytes in chickens infected with Elimeria. In addition, probiotics were shown to relieve symptoms of parvovirus infection in dogs.