55 results about "Ex vivo expansion" patented technology

Methods of ex-vivo expansion of fetal and/or adult progenitor, and umbilical cord blood, bone marrow or peripheral blood derived stem cells in bioreactors for bone marrow transplantation, transfusion medicine, regenerative medicine and gene therapy.

Described are methods for isolating/purifying and expanding animal stem cells and stem-cell-like cells. Isolation methods include conditions comprising preferentially digesting non-stem cells and non-stem-cell-like cells in a population and preferentially adhering stem cells and stem-cell-like cells in a population. Expansion methods include culturing such cells under conditions comprising modulation of TGF-β signaling, inhibition of cell signaling mediated by p38 MAP kinase using small molecular weight inhibitors, expansion of the cells on human amniotic epithelial cells as feeder layers, control of cell seeding density, control of levels of Ca²⁺ in the culture media, rapid adhesion on a substrate or by a combination of such conditions. More particularly, what is disclosed relates to methods and systems for expanding animal cells in ex vivo cell cultures, while preventing cellular differentiation, and selectively enriching stem cells. The embodiments also disclose a culture system for ex vivo expansion of limbal epithelial cells or mesenchymal cells, as well as surgical grafts made there from.

The present invention concerns methods and compositions for immunotherapy employing a modified T cell comprising a chimeric antigen receptor (CAR). In particular aspects, CAR-expressing T-cells are producing using electroporation in conjunction with a transposon-based integration system to produce a population of CAR-expressing cells that require minimal ex vivo expansion or that can be directly administered to patients for disease (e.g., cancer) treatment.

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 relates to a method for carrying out the expansion of multipotent stem cells ex vivo. Moreover, the invention relates to a two-stage method for carrying out the expansion and differentiation of multipotent stem cells ex vivo, in which it is possible for the stem cells to be gene transfected during the first stage, i.e. during the expansion phase. In this phase, the differentiation of the multipotent stem cells takes place optionally in cells of the hematopoietic, endothelial or mesenchymal cell lineage. Stem and progenitor cells as well as mature cells of the hematopoietic, endothelial and mesenchymal cell lineage, which are obtained in this way, can be used, among other things, for the prophylaxis, diagnosis and therapy of human deseases and for tissue engineering.

A method to treat an autoimmune disease is provided. The method involves administration of interleukin-15 receptor (IL-15R) agonists in an amount effective to ameliorate a symptom of the autoimmune disease. The invention also involves a method to treat an autoimmune disease by ex-vivo expansion of CD44+CD122+Kir+ CD8+ Treg cells and administration of the CD44+CD122+Kir+ CD8+ Treg cells. Compositions comprising CD44+CD122+Kir+ CD8+ Treg cells are also provided. Methods for stimulating an immune response to an antigen are also provided.

The present invention includes methods of performing ex vivo expansion of gene-modified hematopoietic stem cells which are useful for many applications involving bone marrow transplantation and ex vivo gene therapy. The present invention further includes the gene-modified hematopoietic stem cells that are used and produced by such methods. Such gene-modified hematopoietic stem cells can also contain a second heterologous gene. In addition, the present invention also includes methods of engrafting the gene-modified hematopoietic stem cells of the present invention into animals, including for ex vivo gene therapy and for reconstitution of hematopoietic cells in ablated mammals. The present invention also provides a method of isolating stem cells.

The present invention provides a therapeutic approach to maintain and expand HSCs in vivo using currently available medications that target GSK-3 and mTOR. The present invention also provides a system and method for the ex vivo culturing of HSCs, where an mTOR inhibitor is combined with a GSK-3 inhibitor within the culturing conditions.

The invention provides an immunocyte medicine containing a B cell vaccine (neoB) loaded with a tumor new antigen, and a medicine combination for united use of neoB and tumor specificity T cells. The neoB vaccine can have higher ex vivo expansion properties than a DC vaccine, has higher effect of continuous activating of in vivo T cells under the condition of repeated infusion, and can become a preventive or therapeutic vaccine or an immunocyte medicine to be applied to tumor resisting treatment suitable for any cancer kind. According to the medicine combination for united use of neoB and tumor specificity T cells, disclosed by the invention, the neoB can be used for further stimulating the tumor specificity T cells in bodies, so that the number of the tumor specificity T cells in bodies can be amplified, and the treatment effect is increased.

The invention provides a method for ex vivo expansion of human vascular endothelial progenitor cells in a low oxygen condition. The method comprises the following steps: separating EPCs from human bone marrow, culturing the EPCs in an incubator in the low oxygen condition, and ensuring that the low oxygen condition adopts a 1 percent O2 low oxygen condition. Gene expression to the EPCs by the lowoxygen condition comprises various gene differential expression, and at least relates to the following biological processes: reaction of cells to fatty acid, and adjustment of positive regulation of the activity of ubiquitin-protein ligase with transformed caryomitosis cell cycles. Compared with normoxia culture, the culture method has the advantages that low oxygen environment is more similar tobone marrow microenvironment, and is more beneficial to keeping the primary characteristics of the EPCs; the method performs molecular level evaluation on change of gene expression in EPCs caused by different culture methods, gives differential expression genes in which the low oxygen condition or anoxic condition affects cell dryness and molecular pathways of the differential expression genes, and is applied to improvement of the current stem cells.

The invention discloses a human stem cell growth factor as well as a production method and application of a polyethylene glycol (PEG) modified human stem cell growth factor. The production method comprises the following steps of: fusing an h-SCF (Stem Cell Factor)-alpha sequence and an SUMO (Small Ubiquitin-Related Modifier) sequence and constructing to obtain an SUMO-rhSCF-alpha fused gene expression vector; transferring the SUMO-rhSCF-alpha fused gene expression vector into a host bacteria to obtain engineering bacteria; culturing the engineering bacteria and inducing to express an SUMO-rhSCF-alpha fused protein; and cutting off an SUMO part to obtain an rhSCF-alpha protein. By using the production method, the high soluble expression and large-scale purification of the rhSCF-alpha protein in cell plasmas are realized, and the activity of the obtained rhSCF-alpha protein is high. The invention also discloses the production method of the PEG modified human stem cell growth factor; the half-life period of the PEG modified human stem cell growth factor obtained by using the method is remarkably prolonged, and the activity of the PEG modified human stem cell growth factor in promoting the proliferation of red blood cells is also remarkably improved; and the PEG modified human stem cell growth factor can be applied to the preparation of medicines for hypohemia therapy, reconstruction and recovery of a hematopoietic function after chemoradiotherapy and a bone marrow transplantation operation, stem cell ex-vivo expansion and gene therapy and cosmetics for promoting the metabolism of epidermal cells, repairing aged and damaged skin cells, delaying the aging of skin and the like.

The present invention relates to a process for deriving dendritic cells from mononuclear cells in culture comprising the step of putting in contact type I IFN with said mononuclear cells. Dendritic cells suitable as cellular adjuvants in prophylactic as well as therapeutic vaccination of animal and human beings, are obtainable thereby, after a single step treatment in a brief period of time. Dendritic cells obtainable thereby, pharmaceutical compositions including them, in particular a vaccine comprising said cells as active principle, and a method of treatment of a pathology associated with the presence of an antigen in human beings, are further objects of the invention, as well as a kit for deriving said dendritic cells and a method for the ex vivo expansion of T cells using them.

Stem cells modified to express activated form of STAT3 by genetic modification or protein delivery, and stem cells co-cultured with cells expressing activated form of STAT3 exhibit increased ex-vivo expansion and enhanced in-vivo regeneration accompanied by net increase in stem cell self-renewal as compared to control group.

Activating Notch signaling in cultured canine muscle derived cells inhibited myogenic differentiation, and increased the number of myogenic progenitor cells that were similar to quiescent or newly activated satellite cells. Importantly, cells expanded in the presence of Notch activation maintained engraftment potential, indicating the potential for therapeutic benefit. Activation of Notch signaling to inhibit myogenic differentiation in cultured human muscle-derived cells is also contemplated, for maintaining engraftment potential using such human cells in transplantation.

The invention provides compositions and methods useful for mobilizing populations of hematopoietic stem and progenitor cells within a donor, as well as for determining whether samples of mobilized cells are suitable for release for ex vivo expansion and/or therapeutic use. In accordance with the compositions and methods described herein, mobilized hematopoietic stem and progenitor cells can be withdrawn from a donor and administered to a patient for the treatment of various stem cell disorders, including hematopoietic diseases, metabolic disorders, cancers, and autoimmune diseases, among others. In certain embodiments, the compositions and methods described herein lead to the mobilization of a population of CD34^dim cells that have immunosuppressive effects and that can reduce the incidence of graft vs. host disease.

An in vitro assay is provided for determining the effect of an immune cell on a cell from an infectious or neoplastic disease. Also provided is an in vitro assay for determining the effect of an activated CD8⁺ T-cell on a sensitized melanoma cell. A method for improving the specific cytolytic activity (SCA) of an immune cell comprising contacting an immune cell with an antigen and an antigen-independent pro-inflammatory agent is provided. A method for ex vivo expansion of antigen-specific CD8⁺ T-cells with enhanced specific cytolytic activity (SCA) comprising culturing the antigen-specific CD8⁺ T-cells in a suitable culture media comprising an amino acid. An in vitro assay is provided for determining the effect of an immune cell on a cell from an infectious or neoplastic disease. A method of treating a subject suffering from an infectious or neoplastic disease with immuno therapy is described.