167 results about "Cell Surface Proteins" patented technology

Genetically engineered, CE7-specific redirected immune cells expressing a cell surface protein having an extracellular domain comprising a receptor which is specific for CE7, an intracellular signaling domain, and a transmembrane domain, and methods of use for such cells for cellular immunotherapy of CE7+ neuroblastoma are disclosed. In one embodiment, the immune cell is a T cell and the cell surface protein is a single chain FvFc:ζ receptor where Fv designates the VH and VL chains of a single chain monoclonal antibody to CE7 linked by peptide, Fc represents a hinge —CH2—CH3 region of a human IgG1, and ζ represents the intracellular signaling domain of the zeta chain of human CD3. DNA constructs encoding a chimeric T-cell receptor and a method of making a redirected T cell expressing a chimeric T cell receptor by electroporation using naked DNA encoding the receptor are also disclosed.

The invention is directed to substantially purified amnion-derived cell populations, compositions comprising the substantially purified amnion-derived cell populations, and to methods of creating such substantially purified amnion-derived cell populations, as well as methods of use. The invention is further directed to antibodies, in particular, monoclonal antibodies, that bind to amnion-derived cells or, alternatively, to one or more amnion-derived cell surface protein markers. The invention is further directed to methods for producing the antibodies, methods for using the antibodies, and kits comprising the antibodies.

The present invention provides methods and compositions for attenuating expression of a target gene in vivo. In general, the method includes administering RNAi constructs (such as small-interfering RNAs (i.e., siRNAs) that are targeted to particular mRNA sequences, or nucleic acid material that can produce siRNAs in a cell), in an amount sufficient to attenuate expression of a target gene by an RNA interference mechanism. In particular, the RNAi constructs may include one or more modifications to improve serum stability, cellular uptake and / or to avoid non-specific effect. In certain embodiments, the RNAi constructs contain an aptamer portion. The aptamer may bind to human serum albumin to improve serum half life. The aptamer may also bind to a cell surface protein that improves uptake of the construct.

A Candida albicans bloodstream infections cause significant morbidity and mortality in hospitalized patients. Filament formation and adherence to host cells are critical virulence factors of C. albicans. Multiple filamentation regulatory pathways have been discovered, however the downstream effectors of these regulatory pathways remain unknown. The cell surface proteins in the ALS group are downstream effectors of the filamentation regulatory pathway. Particularly, Als1p mediates adherence to endothelial cells in vitro and is required for virulence. The blocking of adherence by the organism is described resulting from the use of a composition and method disclosed herein. Specifically, a pharmaceutical composition comprised of a gene, gene product, or specific antibody to the ALS gene family is administered as a vaccine to generate an immune response capable of blocking adherence of the organism.

The invention is composed of monoclonal human MN antibodies or MN antibody fragments that target the GEEDLP (SEQ ID NO: 118) repeat within the proteoglycan domain. The proteoglycan domain of the MN cell surface protein contains four of these identical GEEDLP (SEQ ID NO: 118) repeats. Binding to the desired epitope is verified by competition ELISA, where ELISA signal can be attenuated by co-incubation with a peptide containing this repeat (PGEEDLPGEEDLP (SEQ ID NO: 119)). This inhibition of binding can also be verified using Biacore assays, where binding of desired antibodies to immobilized MN or proteoglycan peptides can be inhibited by the peptide repeat. In addition to binding to the peptide repeat, human anti-MN antibodies can inhibit the cell adhesion of CGL-1 cells to MN coated plastic plates. Human anti-MN antibodies have been used to diagnose and quantify MN expression in cancer cells and tumors using FACS and immunohistochemical methods. An example is also provided where a human anti-MN IgG1 mediates tumor cell lysis though antibody-dependent cell-mediated cytotoxicity. Therefore, these antibodies will be useful for the treatment of cancers in which MN is upregulated or can be useful for the diagnosis of cancers in which MN is upregulated.

The poxvirus proteins designated A41L and 130L bind to three receptor-like protein tyrosine phosphatases (RPTP), leukocyte common antigen related protein (LAR), RPTP-δ, and RPTP-σ, that are present on the cell surface of immune cells. When a host is infected with the poxvirus, binding of A41L to cell surface proteins on the host cells results in suppression of the immune response. The present invention provides agents such as antibodies, and antigen-binding fragments thereof, small molecules, aptamers, small interfering RNAs, and peptide-IgFc fusion polypeptides that interact with one or more of LAR, RPTP-δ, and RPTP-σ expressed by immune cells or interact with a polynucleotide encoding the RPTP. Also provided are RPTP Ig domain oligomers and Fc fusion polypeptides. Such agents are useful for treating an immunological disorder in a subject according to the methods described herein.

The present disclosure relates to compositions and methods of killing cells in vitro or in vivo. In particular examples, the method includes contacting a cell having a cell surface protein with a therapeutically effective amount of an antibody-IR700 molecule, wherein the antibody specifically binds to the cell surface protein. In particular examples the antibody recognizes a tumor-specific antigen on the surface of a tumor cell. The cell is subsequently irradiated, such as at a wavelength of 660 to 740 nm at a dose of at least 1 J cm−2, thereby killing the cell. Also provided are wearable devices that include an article of clothing, jewelry, or covering; and an NIR LED incorporated into the article, which can be used with the disclosed methods.

Cell wall, cell surface and secreted protein nucleic acid molecules and polypeptides and fragments and variants thereof are disclosed in the current invention. In addition, cell wall, cell surface and secreted fusion proteins, antigenic peptides, and anti-cell wall, cell surface and secreted antibodies are encompassed. The invention also provides recombinant expression vectors containing a nucleic acid molecule of the invention and host cells into which the expression vectors have been introduced. Methods for producing the polypeptides of the invention and methods for their use are further disclosed.

Heparin-binding regions of several proteins, such as neural cell adhesion molecule, fibronectin, laminin, midkine, and anti-thrombin III have been shown to promote neurite extension on two-dimensional surfaces. The effect of heparin-binding peptides on neurite extension through three-dimensional matrices was investigated by culturing embryonic chick dorsal root ganglia (DRG) within fibrin gels containing chemically attached heparin-binding peptide (HBP). The length of neurites within fibrin gels containing cross-linked HBP was increased by more than 70% over extension through fibrin gels containing no peptide. The HBP sequence of antithrombin III was incorporated into the fibrin gel as the C-terminal domain of a bidomian, chimeric peptide; the N-terminal second domain of this peptide contained the ∀2-plasmin inhibitor substrate for Factor XIIIa. Factor XIIIa, a transglutaminase, was used to chemically attach the HBP-containing chimeric peptide to the fibrin gels during polymerization. The amount of HBP cross-linked into the fibrin gels was determined, after degradation by plasmin using gel permeation chromatography, to be approximately 8 moles of peptide per mole fibrinogen. A peptide (HBP), where the cross-linking glutamine was replaced with glycine, showed no increase in extension in comparison with fibrin gels. The additional of heparin to the gel percursors resulted in no increase in neurite extension in comparison with fibrin gels. HBPs promote neurite extension by binding to cell surface proteoglycans on the DRG.

This invention provides an isolated population of polynucleotides comprising or corresponding to at least one polynucleotide shown in Table 1 and their respective complements. It also provides a polynucleotide encoding a ligand or antibody or engineered protein that binds to a cell surface protein of an antigen presenting cell and wherein the polynucleotide comprises or corresponds to a polynucleotide shown in Table 1 or its complement. The invention further provides a polynucleotide that encodes a transcription factor and wherein the polynucleotide comprises or corresponds to a polynucleotide shown in Table 1 or its complement.

The invention is directed to substantially purified amnion-derived cell populations, compositions comprising the substantially purified amnion-derived cell populations, and to methods of creating such substantially purified amnion-derived cell populations, as well as methods of use. The invention is further directed to antibodies, in particular, monoclonal antibodies, that bind to amnion-derived cells or, alternatively, to one or more amnion-derived cell surface protein markers. The invention is further directed to methods for producing the antibodies, methods for using the antibodies, and kits comprising the antibodies.

This relates to a discovery of a cell surface protein, namely NgR2, that is implicated in regulation of blood-brain barrier (BBB). In addition, the invention relates methods for identifying agents that modulate BBB permeability. Furthermore, the invention relates to methods of delivering therapeutic agents to the central nervous system by increasing BBB permeability.

The activity of a cell surface protease, particularly an ADAM, is determined in a rapid and sensitive assay employing a whole cell system. The assays are effective to identify effector molecules that affect the activity of a cell surface protease directly or indirectly, and to screen for therapeutic agents that modulate those effector molecules. The assays can also be used to screen for therapeutic agents that modulate the activity of a cell surface protease associated with a disease or medical condition. Kits comprising at least one component of the present assays are also provided.

This invention provides methods, processes, compounds and compositions for modulating the gene expression and modulating the secretion, expression, or synthesis of adhesion proteins or their receptors to cure disease, wherein the modulating comprises positive and negative regulating; wherein comprises inhibiting cancer growth, wherein the adhesion proteins or receptors comprise fibronectin, integrins family, Myosin, vitronectin, collagen, laminin, Glycosylation cell surface proteins, polyglycans, cadherin, heparin, tenascin, CD 54, CAM, elastin and FAK; wherein the methods, processes, compounds and compositions are also for anti-angiogenesis; wherein the cancers comprise breast cancer, leukocyte cancer, liver cancer, ovarian cancer, bladder cancer, prostate cancer, skin cancer, bone cancer, brain cancer, leukemia cancer, lung cancer, colon cancer, CNS cancer, melanoma cancer, renal cancer or cervix cancer.

The present disclosure relates to compositions and methods of killing cells. In particular examples, the method includes contacting a cell having a cell surface protein with a therapeutically effective amount of an antibody-IR700 molecule, wherein the antibody specifically binds to the cell surface protein, such as a tumor-specific antigen on the surface of a tumor cell. The cell is subsequently irradiated, such as at a wavelength of 660 to 740 nm at a dose of at least 1 J cm<-2>. The cell is also contacted with one or more therapeutic agents (such as an anti-cancer agent), for example about 0 to 8 hours after irradiating the cell, thereby killing the cell. Also provided are methods of imaging cell killing in real time, using fluorescence lifetime imaging. Also provided are wearable devices that include an article of clothing, jewelry, or covering; and an NIR LED incorporated into the article, which can be used with the disclosed methods.

The present invention is to provide a multiple-agents-binding compound comprising a compound having anti-HIV activity and having no affinity for cell surface protein bound together with a same or different kind of at least one compound having anti-HIV activity and having no affinity for cell surface protein, or a salt thereof, and a pharmaceutical composition for the prevention or treatment of infectious diseases of HIV or AIDS comprising said multiple-agents-binding compound.

The present invention provides a therapeutic combination comprising (a) a compound of formula (I) as set forth in the specification and (b) one or more antineoplastic agents selected from the group consisting of an alkylating or alkylating-like agent, an antimetabolite agent, a topoisomerase I inhibitor, a topoisomerase 11 inhibitor, an inhibitor of a growth factor or of a growth factor receptor, an antimitotic agent, a proteasome inhibitor, an inhibitor of an anti-apoptotic protein and an antibody directed against a cell surface protein, wherein the active ingredients are present in each case in lice form or in the form of a pharmaceutically acceptable salt or any hydrate thereof.

The invention discloses a thermosensitive microcarrier as well as a preparation technology and an application method thereof. The thermosensitive microcarrier can be used for amplifying, culturing and harvesting high-quality and high-activity cells used for clinical treatment, and the high-quality and high-activity cells are applied to the fields of cell therapy and tissue engineering. The preparation technology comprises the following steps of: grafting active groups by virtue of chemical surface treatment while a high polymer material cell culture microballoon sphere as a matrix, then carrying out reaction on the high polymer material cell culture microballoon sphere and thermosensitive polymer to graft the thermosensitive polymer, so as to obtain a thermosensitive microcarrier used for cell culture, and controlling the temperature during cell culture, so that cells grow and are amplified while being attached onto the surface of the thermosensitive microcarrier; then lowering temperature and haversting cells with complete surface protein. On one hand, a method for amplifying massive cells used for treatment in a short time, on the other hand, no pancreatin or traditional dissociative reagent is used, so that damage on surface protein and ion channel of cells is reduced, the original function of the cells is maintained, and the thermosensitive microcarrier has strong clinical application value and economic value.

The present invention generally provides compositions methods and composition relating to the diagnosis and / or treatment of cancers having a cell surface de-N-acetylated sialic acid antigen, e.g., an at least partially de-N-acetylated ganglioside and / or a de-N-acetylated sialic acid-modified cell surface protein.

The present invention makes available a rapid, reproducible, robust assay system for screening and identifying pharmaceutically effective compounds that specifically interact with and modulate the activity of a cellular protein, e.g., a receptor or ion channel. The subject assay enables rapid screening of large numbers of compounds to identify those which act as an agonist or antagonist to the bioactivity of the cellular protein. In this system, the cell is treated with a compound, and functional interaction of this compound with a cellular receptor yields a detectable signal, which can be specifically measured. The subject assays include methods of identifying compounds which specifically modulate, for example, heterologous receptors coupled to the pheromone response pathway in yeast. The subject assays are particularly amenable to the identification of specific agonists and antagonists of G protein-coupled receptors.

The present invention relates to a commercializable cell and to a gene reporter assay method and a kit which use this cell to determine the presence and / or the level of a molecule that activates signal transduction activity of a cell surface protein. This cell is treated in such a manner that it will have a sufficiently long shelf life for its intended purpose, whereupon at the end of its useful shelf life or at the end of its use, i.e., in an assay, the cell undergoes cellular death.

Provided are methods and compositions for delivering a nucleic acid, protein, and / or ribonucleoprotein payload to a cell. Also provided are delivery molecules that include a peptide targeting ligand conjugated to a protein or nucleic acid payload (e.g., an siRNA molecule), or conjugated to a charged polymer polypeptide domain (e.g., poly-arginine such as 9R or a poly-histidine such as 6H, and the like). The targeting ligand provides for (i) targeted binding to a cell surface protein, and (ii) engagement of a long endosomal recycling pathway. As such, when the targeting ligand engages the intended cell surface protein, the delivery molecule enters the cell (e.g., via endocytosis) but is preferentially directed away from the lysosomal degradation pathway.

The present invention makes available a rapid, effective assay for screening and identifying pharmaceutically effective compounds that specifically interact with and modulate the activity of a target cell surface protein, e.g., a receptor or ion channel. The subject assay enables rapid screening of large numbers of compounds to identify those which modulate the bioactivity of the cellular proteins. The subject assays are particularly amenable for high throughput formats and are particular useful in identifying modulators of a mammalian metabotropic glutamate receptor protein.

The invention discloses novel phosphorylation sites identified in signal transduction proteins and pathways, and provides phosphorylation-site specific antibodies and heavy-isotope labeled peptides (AQUA peptides) for the selective detection and quantification of these phosphorylated sites / proteins, as well as methods of using the reagents for such purpose. Among the phosphorylation sites identified are sites occurring in the following protein types: adaptor / scaffold proteins, adhesion / extracellular matrix protein, apoptosis proteins, calcium binding proteins, cell cycle regulation proteins, chaperone proteins, chromatin, DNA binding / repair / replication proteins, cytoskeletal proteins, endoplasmic reticulum or golgi proteins, enzyme proteins, G / regulator proteins, inhibitor proteins, motor / contractile proteins, phosphatase, protease, Ser / Thr protein kinases, protein kinase (Tyr)s, receptor / channel / cell surface proteins, RNA binding proteins, transcriptional regulators, tumor suppressor proteins, ubiquitan conjugating system proteins and proteins of unknown function.

This invention relates to the PrtR-PrtK cell surface protein of Porphyromonas gingivalis and in particular a multimeric cell association protein complex comprising the PrtR and PrtK proteins. Accordingly the invention provides a substantially purified antigenic complex for use in raising an antibody response directed against Porphyromonas gingivalis. The complex comprises at least one multimeric protein complex of arginine-specific and lysine-specific thiol endopeptidases each containing at least one adhesin domain, the complex having a molecular weight of greater than about 200 kDa. The invention also relates to pharmaceutical compositions and associated agents based on said complex for the detection, prevention and treatment of Periodontal disease associated with P. gingivalis.