165 results about "Secretory cell" patented technology

The present invention a provides methods for production of heterologous polypeptides, for example amylin, using recombinantly engineered cell lines. Also described are methods engineering cells for high level expression, methods of large scale heterologous protein production, methods for treatment of disease in vivo using viral delivery systems and recombinant cell lines, and methods for isolating novel amylin receptors.

The present invention a provides methods for production of heterologous polypeptides using a variety recombinantly engineered secretory cell lines. The common feature of these cell lines is the absence of expression of at least one endogenous polypeptide. The host cell machinery normally used to produce the endogenous polypeptide is then usurped for the purpose of making the heterologous polypeptide. Also described are methods engineering cells for high level expression, methods of large scale protein production, and methods for treatment of disease in vivo using viral delivery systems and recombinant cell lines.

The invention relates to the field of biology, and discloses a serum-free culture medium which essentially comprises an IMDM (Iscove Modified Dulbecco Medium), L-glutamine, sodium bicarbonate, Hepes, recombinant human insulin, recombinant human transferrin, recombinant human albumin, 2-mercaptoethanol, protocatechuic acid, lipid, amino acid, vitamins, trace elements, Pluronic F-68, hydrocortisone, vitamin C, bonding amine or recombinant human fibronectin, progesterone, putrescine, heparin, serotonin, epidermal growth factors (EGFs), b-fibroblast growth factors (FGF), platelet derive growth factor (PDGF)-BB and insulin-like growth factor (IGF)-I. The serum-free culture medium is clear in chemical components, free from animal sources and serum and safe and ideal in cell cultivation and avoids the doped animal components and unstable batches, and the results of the cultured mesenchymal stem cells show that the total cellular score, the cell phenotype and the secretory cell factors are normal, so that the serum-free culture medium has good industrial application prospect.

Embodiments of the present invention relate to devices and methods for detecting cellular products using detection particles having product-specific detection reagents and having a characteristic spectral feature. In particular, devices and methods are provided for measuring secreted cellular products including cytokines. Detection substrates, include microwells having product-specific capture reagents thereon or comprising hydrophobic membranes are described having greater capability to detect products from individual cells in a mixture of heterogeneous cells. With the use of multiple detection particles, multiple cellular products can be detected in a single well. Additionally, using the inherent spectral properties of detection particles, no enzymatic reactions are needed to visualize a secreted product, thereby increasing the sensitivity, reproducibility and ease of use.

A human immature endocrine cell population and methods for making an immature endocrine cell population are provided. Specifically, immature beta cells and methods for production of immature beta cells are described. Immature beta cells co-express INS and NKX6.1 and are uni-potent and thereby develop into mature beta cells when implanted in vivo. The mature beta cells in vivo are capable of producing insulin in response to glucose stimulation.

The invention discloses an anti-BCMA chimeric antigen receptor, an encoding gene, a recombinant expression vector and an establishing method and application of the anti-BCMA chimeric antigen receptor, the encoding gene and the recombinant expression vector. The receptor comprises a CD8 leader chimeric receptor signal peptide, a BCMA single-chain antibody heavy chain VH, an Optimal Linker C, a BCMA single-chain antibody light chain VL, a CD8 Hinge chimeric receptor hinge, a CD8 Transmembrane chimeric receptor transmembrane domain, a CD137 chimeric receptor co-stimulatory factor and a TCR chimeric receptor T cell activating domain which are sequentially connected in series. In addition, the invention further discloses the encoding gene and the recombinant expression vector of the anti-BCMA chimeric antigen receptor and the establishing method and application of the encoding gene and the recombinant expression vector. The secretion of cell factors and the cytotoxicity in vitro of CAR-T cells can be remarkably improved, and the clinical treatment effect is outstanding.

An isolated population of cells is provided. The isolated population of cells comprising at least one secretor cell capable of secreting a molecule and at least one sensor cell capable of producing a detectable signal upon being exposed to the molecule.

Biological agents such as secretory cells are encapsulated in a hydrophilic gel made of agarose or collagen-agarose and gelatin sponge-agarose combinations. In a preferred embodiment, semi-solid beads are formed from a suspension containing collagen, agarose and secretory cells such as pancreatic islets, the collagen is polymerized to form solid, agarose-collagen beads and the solid beads are coated with agarose. Coating is preferably by rolling the solid beads in about 5-10% agarose, contacting the rolled beads with mineral oil and washing oil from the beads. Beads containing secretory cells can be transplanted into a mammal to treat a condition caused by impaired secretory cell function.

The invention relates to the technical field of adipose mesenchymal stem cells in the technical field of cell therapy, in particular to a method for enhancing an immune regulating function and a migration capacity of adipose mesenchymal stem cells. Primary culture and secondary culture are performed to the adipose mesenchymal stem cells obtained through separation, and then short-time culture is performed by using culture medium containing low-concentration TLR3 activator Poly(I:C). After Poly(I:C) co-stimulation culture is performed, the obtained adipose mesenchymal stem cells with a brand new phenotype have a stronger migration capacity, the levels of secreting cytokine and chemotactic factor are changed and a stronger immunosuppressive function is reflected on the whole.

The invention relates to the discovery that the proliferation and survival of pancreatic progenitor cells can be enhanced by contacting the cells with, (1) a caspase inhibitor sufficient to reduce apoptosis in the pancreatic endocrine cells; and, (2) a growth factor in an amount sufficient to increase the level of activated Akt in the pancreatic endocrine cells.

The invention features a method for generating new tissue by obtaining a liquid hydrogel-cell composition including a hydrogel and tissue precursor cells; delivering the liquid hydrogel-cell composition into a permeable, biocompatible support structure; and allowing the liquid hydrogel-cell composition to solidify within the support structure and the tissue precursor cells to grow and generate new tissue. The invention also features a tissue forming structure including a permeable, biocompatible support structure having a predetermined shape that corresponds to the shape of desired tissue; and a hydrogel-cell composition at least partially filling the support structure, wherein the hydrogel-cell composition includes a hydrogel and tissue precursor cells. The new tissue forming structure can be used in new methods to generate various tissues (e.g., to treat defective tissue) including new bone, cartilage, and nervous tissue such as spinal cord tissue. The invention also new isolated nervous system stem cells.

Methods and compounds are disclosed that relate to screening and selection of monoclonal antibodies specific for antigens in heterogeneous antigen mixtures. Antibody-secreting cells such as hybridomas are modified to make them capable of directly binding antigens by capturing their secreted antibody products onto their surface membranes in appropriate binding density and orientation. Selectivity of binding to novel or desired antigens is achieved by first reacting the antigen mixtures affixed to a solid substrate with a polyclonal antibody library that prevents access to the majority of antigens or epitopes other than those that are novel or desired.

Methods, uses, agents and compositions useful for the diagnosis, prevention and / or treatment of inflammatory conditions, such as neuroinflammatory conditions such as multiple sclerosis, and for the identification and selection of inflammatory cytokine-secreting T cell or a precursor thereof, based on the expression and / or modulation of melanoma cell adhesion molecule (MCAM) are disclosed.

Biological agents such as secretory cells are encapsulated in a hydrophilic gel made of agarose or collagen-agarose and gelatin sponge-agarose combinations. In a preferred embodiment, semi-solid beads are formed from a suspension containing collagen, agarose and secretory cells such as pancreatic islets, the collagen is polymerized to form solid, agarose-collagen beads and the solid beads are coated with agarose. Coating is preferably by rolling the solid beads in about 5-10% agarose, contacting the rolled beads with mineral oil and washing oil from the beads. Beads containing secretory cells can be transplanted into a mammal to treat a condition caused by impaired secretory cell function.

The invention relates to the field of biology, and discloses a non-animal-source serum-free culture medium which essentially comprises an IMDM (Iscove Modified Dulbecco Medium), L-glutamine, sodium bicarbonate, recombinant human insulin, recombinant human transferrin, recombinant human albumin, 2-mercaptoethanol, phytohaemagglutinin (PHA), lipid, amino acid, vitamins, trace elements, interleukin-3(IL-3), stem cell factor, (SCF), Fit3-L, IL-6 and granulocyte colony-stimulating factor (G-CSF). The non-animal source serum-free culture medium is clear in chemical components, free from animal sources and serum and safe and ideal in cell cultivation, avoids the doped animal components and unstability of batches, and the results of cultured umbilical cord blood stem cells show that the total cellular score, the cell phenotype and the secretory cell factors are normal, so that the non-animal-source serum-free culture medium has good industrial application prospect.

A method of treating or preventing radiation damage by administering to a patient in need of treatment at least one therapeutically effective amount of a mesenchymal stem cell genetically altered to secrete extracellular superoxide dismutase is provided. Also provided is a therapeutic for treating and / or preventing radiation related or damage by similar agents, the therapeutic contains genetically modified mesenchymal stem cells capable of secreting extracellular superoxide dismutase.

The invention discloses an anti-EGFRvIII chimeric antigen receptor, an encoding gene, a recombinant expression vector, a construction method of the recombinant expression vector, and an application. The anti-EGFRvIII chimeric antigen receptor comprises CD8 leader chimeric receptor signal peptide, an EGFRvIII single-chain antibody light chain VL, Optimal Linker C, an EGFRvIII single-chain antibody heavy chain VH, a CD8 Hinge chimeric receptor hinge, a CD8 Transmembrane chimeric receptor transmembrane domain, a CD137 chimeric receptor co-stimulated factor and a TCR chimeric receptor T cell activating domain which are connected in series. Moreover, the invention discloses an encoding gene of the anti-EGFRvIII chimeric antigen receptor, a recombinant expression vector, a construction method of the recombinant expression vector, and an application. Secretion of cell factors and an in-vitro killing effect of CAR-T cells are obviously improved, and the CAR-T cells have an outstanding clinical treatment effect.

The invention discloses a preparing method for clinic level cells for enhancing the immune modulating function of MSCs. The preparing method is suitable for culturing the mesenchymal stem cells from bone marrow, fat and the umbilical cord. A serum-free complete medium is adopted to culture the mesenchymal stem cells from umbilical cord tissue, a traditional method is improved by applying a secondary inoculation method, and the obtaining rate of primary cells is increased. Imidazoquinoline R848 with the concentration of 1-5 micrograms / milliliters and recombinant human interferon I FN-alpha-2b with the concentration of 100-200 units / milliliters are applied as pretreatment factors and obviously induce high expression of the MSCs and secretory cell factors VEGF, HGF and PGE-2, the capacity for modulating immune and promoting tissue regeneration of the MSCs is brought into play better, the multiplication capacity and the capacity for resisting NK cell killing of the MSCs can be improved obviously, and the pretreated MSCs have the enhanced capacity for suppressing lymphocyte proliferation and can be applied to treatment on the GVHD with T cells as the principal and other autoimmune diseases better.

The invention relates to a slow release microballoon agent of hyperglycemic factor sample peptide and the use as antihypelipidemic medicine or body weight control, wherein GLP-1 is a kind of inner source polypeptide excreted from the secretory cell of the small intestine and large intestine and nerve cells of the brain, having the effects of stimulating insuline secretion and inhibition pancreatic glucagons secretion .

The disclosure provides an implantable bioartificial active secretion system for providing a physiological regulating secretion such as insulin necessary for functionality of a physiologic activity such as glucose metabolism of a living-being host. The system includes a housing implantable within the host, in fluidic communication with tissue fluid indicative of a physiological regulating secretion need. A chamber within the housing contains a plurality of physiologically active, autonomously functioning, live secretory cells for producing the physiological regulating secretion. A continually operating two pump apparatus moves tissue fluid into contact with the secretory cells for pick up of the physiological regulating secretion for subsequent physiologically-effective dispensing into the host, while avoiding immunorejection of the host body or of the host to the secretory cells.

The invention discloses an anti-human PD-L1 antibody with high affinity, high specificity and multiple antigen recognition epitopes and having higher functionality. The PD-L1 monoclonal antibody can be specifically combined with PD-1, and can effectively block combination of PD-L1 and PD-1 protein, specifically relieve immune negative regulation of PD-L1, and activate T cell secretory cell factors. All the functions can reach a currently unique level of PD-L1 targeted drug Tecentriq (MPDL3280A), and partial antibodies have greater diversity by being different from epitope of Tecentriq. One PD-L1 antibody can promote combination of PD-L1 with PD-1 protein, but can still relieve immune negative regulation of PD-L1, and activate T cell secretory cell factors.

The invention discloses an anti-CD33 chimeric antigen receptor, a coding gene, a recombinant expression vector and a construction method and an application of the recombinant expression vector. The anti-CD33 chimeric antigen receptor comprises a CD8leader chimeric receptor signal peptide, a heavy chain VL of a CD33 single-chain antibody, an Optimal Linker C, a light chain VH of the CD33 single-chain antibody, a CD8Hinge chimeric receptor hinge, a CD8Transmembrane chimeric receptor transmembrane domain, a CD137 chimeric receptor co-stimulation factor and a TCR chimeric receptor T-cell activation domain, which are serially connected in sequence. In addition, the invention discloses the coding gene of the anti-CD33 chimeric antigen receptor, the recombinant expression vector and the construction method and the application of the recombinant expression vector. According to the anti-CD33 chimeric antigen receptor, the secretion of cell factors and the in vitro killing effect of CAR-T (Chimeric Antigen Receptor T-Cell Immunotherapy) cells can be remarkably improved, and the clinical treatment effect is outstanding.

The invention discloses a method for effectively inducing stem cells to differentiate into pancreas islet beta cells. The method comprises the following steps: under the condition of inducing cell agglomeration, firstly treating the cell cluster through adopting an MET agonist, so as to achieve the method for effectively inducing stem cells to differentiate into pancreas islet beta cells. According to the method, the efficiency and vigour of stem cells differentiation into insulin secretory cells are improved, and hyperglycemia caused by the situations that beta cells are damaged and the absolute amount of insulin secretion decreases is treated.

The invention relates to a monoclonal antibody capable of recognizing a human leukocyte differentiation antigen CK8, a secretory cell strain, a preparation method thereof and application in immunodetection. According to the technical scheme, 340-365 amino acid sequences at the C tail end of CK8 protein are selected as antigen peptides, and the antigen peptides are coupled with KLH carrier protein to obtain the immunogen; the amino acid sequence of the antigen peptide is shown as SEQID1, a mouse is immunized, and the mouse hybridoma cell strain 14C2 capable of efficiently secreting the anti-CK8 protein monoclonal antibody and the anti-CK8 protein monoclonal antibody secreted by the cell strain are obtained through cell fusion, screening and subcloning. The antibody obtained by the scheme has high specificity and sensitivity, can specifically recognize cells expressing the CK8 protein, and is suitable for immunological detection, especially immunohistochemical detection.

The invention relates to a device for delivery of pigment epithelium derived factor (PEDF) to the eye utilizing encapsulated PEDF-secreting cells and related methods for the treatment and prevention of ophthalmic diseases and disorders.

The invention discloses an anti-CD138 chimeric antigen receptor, a coding gene, a recombinant expression vector and a construction method and an application of the recombinant expression vector. The anti-CD138 chimeric antigen receptor comprises a CD8leader chimeric receptor signal peptide, a light chain VH of the CD138 single-chain antibody, an Optimal Linker C, a heavy chain VL of a CD138 single-chain antibody, a CD8Hinge chimeric receptor hinge, a CD8Transmembrane chimeric receptor transmembrane domain, a CD137 chimeric receptor co-stimulation factor and a TCR chimeric receptor T-cell activation domain, which are serially connected in sequence. In addition, the invention discloses the coding gene of the anti-CD138 chimeric antigen receptor, the recombinant expression vector and the construction method and the application of the recombinant expression vector. According to the anti-CD138 chimeric antigen receptor, the secretion of cell factors and the in vitro killing effect of CAR-T (Chimeric Antigen Receptor T-Cell Immunotherapy) cells can be remarkably improved, and the clinical treatment effect is outstanding.

The invention provides an application of a method for the autocrine secretion of an extracellular matrix by stem cells and the induction of the stem cells to become hepatocytes. The extracellular matrix is secreted by inducing bone marrow mesenchymal stem cells and removes the matrix of the bone marrow mesenchymal stem cells. The invention concretely provides the method for inducing the bone marrow mesenchymal stem cells into hepatocytes by the extracellular matrix according to actual demands. The method for generating the hepatocytes through induction has the advantages of high efficiency, practicality, high induction efficiency and good differentiation effect, and the glycogen synthesis capability and the urea synthesis capability of the hepatocytes obtained after the induction are strong.