50 results about "Integrin Receptor" patented technology

The present invention is based on the discovery that a vascular stent or other implantable medical device can be coated with a biodegradable biocompatible polymer to which is attached a bioligand that specifically captures progenitors of endothelial cells (PECs) from the circulating blood to promote endogenous formation of healthy endothelium in Type II diabetics. In one embodiment, the bioligand is a peptide that specifically binds to an integrin receptor on PECs. The invention also provides methods for using such vascular stents and other implantable devices to promote vascular healing in Type II diabetics, for example following mechanical intervention.

αvβ3 Integrin receptor targeting liposomes comprise a cationic amphiphile such as a cationic lipid, a neutral lipid, and a targeting lipid. The targeting lipid includes a non-peptidic αvβ3 integrin antagonist.

An immunoliposome composition targeted to the alphaV-integrin subunit of integrin receptors comprised of ligand-targeted liposomes bearing at least one targeting-ligand derived from an antibody and having binding specificity for at least one integrin receptor comprising an alpha V subunit including αvβ1, αvβ3 αvβ5, αvβ6, or αvβ8 integrin cell receptors is described. The antibody-derived targeting ligand may be a Fab′ fragment, a scFv, or the like. Binding of the immunoliposome to αv-integrin expressing cells, preferably results in internalization of the immunoliposome for cytoplasmic delivery of a liposome-entrapped agent.

The present invention is based on the discovery that a vascular stent or other implantable medical device can be coated with a biodegradable biocompatible polymer to which is attached a bioligand that specifically captures progenitors of endothelial cells (PECs) from the circulating blood to promote endogenous formation of healthy endothelium in Type II diabetics. In one embodiment, the bioligand is a peptide that specifically binds to an integrin receptor on PECs. The invention also provides methods for using such vascular stents and other implantable devices to promote vascular healing in Type II diabetics, for example following mechanical intervention.

The invention provides a cyclic NGR polypeptide, a radionuclide-labeled aminopeptidase targeting molecular probe and application thereof. The molecular probe is obtained by labeling the cyclic NGR polypeptide with radionuclide, or coupling the cyclic NGR polypeptide with a bifunctional chelating group, and then labeling the coupled product with radionuclide. The radionuclide-labeled aminopeptidasetargeting molecular probe can be used for preparing a developing agent for diagnosing aminopeptidase N (CD13) high-expression tumors or preparing a drug for biological targeting treatment of aminopeptidase N (CD13) high-expression tumors. The integrin receptor can be accurately positioned in vivo, the aim of tumor molecular imaging is achieved through nuclear medicine imaging, and the in-vivo targeting property and the retention time thereof can be remarkably improved. And the aminopeptidase N (CD13) tumor can be accurately positioned as a carrier of radioactive therapy nuclide, so that the aim of treating tumors is fulfilled. The structural formula of the cyclic NGR polypeptide is shown in the specification.

Isolated protein complexes are provided comprising keratinocyte growth factor and vitronectin, or at least domains thereof that enable binding to and activation of both a keratinocyte growth factor receptor and an integrin receptor for vitronectin. These protein complexes include synthetic proteins where the keratinocyte growth factor and vitronectin sequences are joined by a linker sequence. In particular forms, vitronectin sequences do not include a C-terminal heparin binding domain. Also provided are uses of these protein complexes for stimulating or inducing cell migration and / or proliferation in wound healing, tissue engineering, cosmetic and therapeutic treatments such as skin replacement, skin replenishment and treatment of burns where epithelial cell migration is required. In other embodiments, the invention provides inhibition of cancer cell metastasis, particularly in relation to breast cancer.

The present invention belongs to the field of pharmaceutical technology and clinical pharmacy, relates to a cyclopeptide containing arginine-glycine-aspartic acid (RGD) sequence and its active liposome targeting, its preparation and application. The described cyclopeptide structure meets the requirements as ligand, and is cyclized by amido bond, its spatial conformation is stable, and is not easily degraded, its one end contains active sulphydryl group, and is convenient for modifying artificially-synthetic function peptide, its molecular weight is small, so that it is not easy to result in immune reaction, and can be used as ligand, and can be combined with hepatic stellate cell (HSC) surface integrator acceptor to construct active liposome targeting and implement target therapy for experimental hepatic fibroid cell. Said invention can obtain good therapeutic effect for curing hepatitis fibrosis.

The invention discloses a bionic recombined lipoprotein / photosensitizer nanoparticle, and a preparation method and an application of the bionic recombined lipoprotein / photosensitizer nanoparticle. Thenanoparticle comprises a phospholipid monomolecular layer, and a photosensitizer and cholesteryl ester that are enveloped in the phospholipid monomolecular layer, wherein RGD (arginine-glycine-aspartic acid) peptide modified apolipoprotein is embedded into the surface of the phospholipid monomolecular layer; and cholesterol is further distributed among phospholipid molecules of the phospholipid monomolecular layer. The nanoparticle is effectively accumulated at a tumor site through high permeability and a retention effect of a solid tumor and high affinity of the apolipoprotein and a scavenger receptor, and further achieves target deep penetration to the tumor using high affinity of RGD and an integrin receptor. The nanoparticle can generate active oxygen and high heat under irradiation of near infrared light, promotes quick release of the photosensitizer from lipoprotein, and achieves a synergic photodynamic and photo-thermal treatment effect; and at the same time, fluorescent lightgenerated by triggering of near-infrared wavelength light can effectively perform in-vivo diagnosis, so that the nanoparticle achieves double functions of target treatment and diagnosis.

A method of enhancing binding of cells to an integrin-binding ligand comprises treating integrin-expressing cells in vitro with an agonist of integrin, wherein the integrin is selected from the group consisting of α4β1, α5β1, α4β7, αvβ3 and αLβ2, and contacting the treated cells with an integrin-binding ligand; integrin agonist compounds having the general formula I; methods of treating integrin-expressing cells with such agonists to enhance binding; and therapeutic methods comprising administering agonist-treated cells or agonist compounds to a mammal.

The present invention provides brain cells, such as normal brain cells, apolipoprotein E deficient brain cells, or apoE4 containing brain cells, that are treated with a compound which can modulate integrins and / or integrin receptors to produce increased sequestration of and / or accumulation of and / or uptake of Aβ, and / or changes in cathepsin D content and / or lysosomal dysfunction, and / or microglia activation in the brain cells. The present invention also provides methods for producing such cells and methods for using the cells for screening an agent or substance that modulates the sequestration of and / or accumulation of and / or uptake of Aβ, and / or lysosomal dysfunction, and / or changes in cathepsin D content and / or microglia activation in the brain cells. The method further provides a new therapeutic target, antagonism of glutamate receptors, for the treatment of neurodegenerative diseases which are characterized by inter alia, abnormal amyloid uptake and / or accumulation.

Techniques for the production of flow-oriented collagen gels using hydrodynamics to influence the assembly of collagen fibers. Highly concentrated monomeric solutions of collagen are subjected to shear and extensional flow as they are drawn onto a substrate to induce fibrillogenesis under a high Ph buffer. The produced gel captures the flow induced ordering of molecular collagen upon fibril formation. The depositing or the induction of fibrillogenosis occurs without the application of a magnetic field to the concentration of collagen. These highly oriented 3D scaffolds are capable inducing contact guidance and guiding mammalian cell growth. The collagen fibers mimic the construction of in vivo fibers with the characteristic D-periodicity and the integrin receptors on the fibroblasts respond to this organization. The industrial applications of three-dimensional collagen gels as a biomaterial are widespread from drug delivery to burn repair or tissue engineering system.