107 results about "Tissue plasminogen activator" patented technology

Disclosed are methods of producing eukaryotic disulfide bond-containing polypeptides in bacterial hosts, and compositions resulting therefrom. Co-expression of a eukaryotic foldase and a disulfide bond-containing polypeptide in a bacterial host cell is demonstrated. In particular embodiments, the methods have been used to produce mammalian pancreatic trypsin inhibitor and tissue plasminogen activator (tPA) in soluble, biologically-active forms, which are isolatable from the bacterial periplasm. Also disclosed are expression systems, recombinant vectors, and transformed host cells.

A process for inhibiting vascular proliferation separately introduces components into the eye to generate plasmin in the eye in amounts to induce complete posterior vitreous detachment where the vitreoretinal interface is devoid of cortical vitreous remnants. The process administers a combination of lysine-plasminogen, at least one recombinant plasminogen activator selected from the group consisting of urokinase, streptokinase, tissue plasminogen activator, chondroitinase, pro-urokinase, retavase, metaloproteinase, and thermolysin and a gaseous adjuvant to form a cavity in the vitreous. The composition is introduced into the vitreous in an amount effective to induce crosslinking of the vitreous and to induce substantially complete posterior vitreous detachment from the retina without causing inflammation of the retina. The gaseous adjuvant material is introduced into the vitreous simultaneously with or after the lysine-plasminogen and recombinant plasminogen activator such as recombinant urokinase to compress the vitreous against the retina while the composition induces the complete posterior vitreous detachment.

The present invention relates to a method and apparatus for the encapsulation of substances and drugs into cells and platelets. The present invention is also related to the incorporation of thrombus dissolving drugs, such as tissue plasminogen activator and streptokinase into platelets using the apparatus described herein. The treated platelets can then be used to treat patients suffering from a thrombus blocking a blood vessel. The present invention is also related to a preparation of red blood cells that has a stable right shift of the oxygen dissociation curve.

During lung injury, p53 expression increases, inducing plasminogen activator inhibitor-1 (PAI-1) while inhibiting expression of urokinase-type plasminogen activator (uPA) and its receptor (uPAR), resulting in apoptosis of lung epithelial cells (LECs). In the bleomycin lung injury model, p53 and PAI-1 are induced while uPA and uPAR are inhibited. A 20 residue peptide DGIWKASFTTFTVTKYWFYR termed PP-1 (the Cav-1 scaffolding domain) or peptide NYHYLESSMTALYTLGH, termed PP-2, protected LECs from bleomycin-induced apoptosis in vitro and in vivo and prevented subsequent pulmonary fibrosis by attenuating lung epitheilial damage. Pharmaceutical compositions, peptide multimers and deliverable polypeptides comprising the above peptides are dislcosed. The peptides and functional variants, peptide multimers, cell-targeted polyepeptides and pharmaceutical compositions are used in methods for inhibiting apoptosis of injured or damaged lung epithelial cells and for treating acute lung injury and consequent pulmonary fibrosis.

Methods for inhibiting angiogenesis comprising administering tissue-plasminogen activator (tPA) inhibitors, and pharmaceutical compositions suitable for the methods comprising the tPA inhibitors. Also provided are methods for stimulating angiogenesis comprising administering tPA to a patient in need thereof, and pharmaceutical compositions comprising an effective amount of tPA for the methods of stimulation. The present invention discloses that tPA is a specific PDGF-C activating protease, and that the CUB-domains in PDGF-CC directly interact with the protease, are required for efficient proteolysis, and released CUB-domains are tPA inhibitors. Preferably, the method and compositions of the present invention are used for simultaneously stimulating, or simultaneously inhibiting, thrombolysis and angiogenesis.

The invention discloses a recombinant TNK-tPA-Fc fusion protein, and a preparation method and application thereof. The protein orderly contains human TNK-tPA, a flexible peptide joint and human IgG natural or variant Fc. The fusion protein has invitro and invivo biological activity similar to human TNK-tPA, and greatly prolonged plasma half-life.

The present invention relates generally to a method of reducing the level of plasminogen and/or tissue plasminogen activator and/or other protease(s) in a solution comprising fibrinogen and/or Factor VIII and/or von Willebrand factor (VWF), the method comprising: (i) passing a feedstock comprising fibrinogen and/or Factor VIII and/or VWF through a hydrophobic charge-induction chromatographic resin under conditions selected such that the plasminogen and/or tissue plasminogen activator and/or other protease(s) is bound to the resin; and (ii) recovering the solution comprising fibrinogen and/or Factor VIII and/or VWF which passes through the resin; wherein the concentration of the plasminogen and/or tissue plasminogen activator and/or protease(s) in the recovered solution is reduced by at least 50% compared to the feedstock. Also provided are solutions and pharmaceutical formulations comprising the fibrinogen and/or Factor VIII and/or VWF recovered by such methods, and uses thereof.

The present invention relates to methods of treating, preventing or ameliorating ischemia-related, neural cell degeneration in a subject being treated with a thrombolytic agent, by administering to the subject one or more neuroprotective thiosemicarbazone compounds. More particularly, the present invention relates to methods of preventing, treating or ameliorating the adverse neurological side effects of tissue plasminogen activator, which is used in the treatment of ischemic stroke, by co-administering one or more compounds of the present invention. One such neuroprotective compound is PAN-811. The invention also relates to compositions comprising PAN-811 or analogs thereof in admixture with a thrombolytic agent, such as tPA.

This invention relates to novel fusion proteins, comprising a targeting protein and a plasminogen activator, preferably an antibody that binds to P-selectin, operably linked to the plasminogen activator DSPAalpha1, or analogs, fragments, derivatives, or variants thereof, which are useful as thrombolytic agents. Pharmaceutical compositions containing these fusion proteins, methods of using these fusion proteins as thrombolytic agents, and processes for synthesizing these fusion proteins are also described herein.

The invention provides fusion toxins that contain one or more regions of diphtheria toxin and a portion of urokinase-type plasminogen activator, as well as the nucleic acids that encode the fusion toxins and methods of using the fusion toxins.

The invention provides a recombinant duck viral enteritis virus vaccine for expressing secretory duck Tembusu virus M/E protein, and a construction method and application thereof. The collection number is CCTCC NO:V201215, and the name is rDEV-TME-tPAS. By using a recombinant clone technique, a gene segment rDEV-TME-tPAS comprising an SV40 promoter, duck Tembusu virus M and E proteins and a tPA (Tissue plasminogen activator) signal peptide sequence is inserted into a spacer between the US7 and US8 genes of the duck viral enteritis virus to construct a cosmid in which the rDEV-TME-tPAS expression frame is inserted between the US7 and US8 genes, thereby obtaining the recombinant duck viral enteritis virus vaccine CCTCC V201215 for expressing secretory duck Tembusu virus M/E protein. The invention also provides a method for constructing a recombinant duck viral enteritis virus vaccine strain and application of the recombinant duck viral enteritis virus vaccine strain in preparing a vaccine for preventing infectious diseases caused by duck viral enteritis virus and duck Tembusu virus.

The invention concerns an improved therapeutic regimen for the treatment of thrombolytic disorders, such as acute myocardial infarction (AMI). In particular, the present invention concerns the treatment of thrombolytic disorders, e.g. AMI, with a combination of a tissue plasminogen activator (t-PA) variant having improved fibrin specificity and extended plasma half-life when compared with wild-type human t-PA and a low molecular weight heparin.

An ocular implant is provided for an intraocular delivery of a therapeutic biologic agent. The implant may be used intracamerally or intravitreally. The implant may include a sustained-release biodegradable core and a biodegradable shell, wherein the shell has a longer biodegradable half-life than the core. The core may include a biodegradable gel medium, an active therapeutic biologic agent, and a biologic stabilizer. Upon insertion into the anterior chamber or vitreous body of an eye, the therapeutic biologic agent is released over an extended period, that may range from one day to one year. The therapeutic biologic agent may be, for example, tissue-plasminogen activator, an anti-VEGF agent, or another biopharmaceutical. The biodegradable implant may completely dissolve after implantation and need not be removed.

Human plasminogen activator analog peptide and its production are disclosed. It is based on protein molecule interaction critical theory and uses solvent of streptokinase and glycosylzyme as mechanism. It is carried out by taking human plasminogen as target protein by surface displaying technology of phagicin random polypeptide base, biological elutriating, screening, obtaining polypeptide sequence with mu Pg high affinity, and solid-phase synthesizing the analog peptide. Its advantages include small molecular weight, low immunity, simple process and easy control of product output, purity and activity. It can be used to prepare oral preparation and prevent thrombogenesis.

The present invention relates to an efficient and improved process for purifying a recombinant protein. The invention relates to the purification of tissue plasminogen activator (tPA), such as truncated human tPA, recombinantly produced in bacteria, for example in E. coli. The present invention provides a process that requires less refolding volume after solubilization of inclusion bodies isolated from cells expressing the recombinant tPA, without affecting the yield and purity of the tPA protein. The invention also provides optimum arginine concentrations for use during protein refolding and during ion exchange chromatography.

The invention relates to a preparation method of an osteoarthritis animal model. The method comprises the following steps: blending a matrix metalloproteinase-3 with normal saline so as to obtain a 5-10nmol/L matrix metalloproteinase-3 solution; blending a urokinase-type plasminogen activator with the normal saline so as to obtain a 2-4nmol/L urokinase-type plasminogen activator solution; then, blending the two solutions in proportion of 3:1 or 2:1 so as to obtain a mixed solution; injecting 0.5mL/kg of mixed solution into an articular cavity of an experimental animal. According to the method, the matrix metalloproteinase-3 and the urokinase-type plasminogen activator which are of conventional chemical reagents in a laboratory are taken as raw materials; the mixture is injected into the articular cavity of the animal, so that the rapid degeneration of cartilage tissues is generated. Thus, the pathogenesis process of osteoarthritis is simulated, thereby bringing great convenience for the research of an osteoarthritis intervention treatment technology. The method has the characteristics of being simple and convenient to operate, rapid in modelling, economical, practical, convenient in material obtainment, and the like.

The invention belongs to the technical field of magnetic nano materials, and discloses a magnetic nano material capable of improving intravenous thrombolysis treating efficiency and a preparation method thereof. The method comprises the following steps: performing surface modifying on a Fe3O4 magnetic nano rod/ Fe3O4 nano rod, and covalently binding with a tissue plasminogen activator; binging themagnetic nano road and the tissue plasminogen activator molecules; and realizing targeted therapy under the guide of an outside magnet; the magnetic nano material comprises the tissue plasminogen activator and the Fe3O4 nano rod. Compared with other magnetic materials, the prepared Fe3O4 magnetic nano bar has the advantages of being nontoxic and porous in structure, and can be covalently bound with tPA after surface modification; the tPA-nano rod is capable of effectively releasing the carried tPA in the outside rotating magnetic field, thus accelerating thrombolysis.

The invention belongs to the technical field of protein separation and purification and particularly relates to a purification method of an rhTNK-tPA (recombinant human TNK tissue-type plasminogen activator for injection) cell harvesting fluid. The key point is that the rhTNK-tPA cell harvesting fluid is subjected to deep filtration and sterilizing filtration before column chromatography, so thatthe problem that the conventional filler for column chromatography after filtration is prone to caking can be solved effectively, clarity of a filtrate is high (smaller than or equal to 0.3 NTU), filter loss is small (smaller than or equal to 5%), and significant progress is made as compared with the prior art.

A process for renaturating, separating and purifying the mutant of tissue plasminogen activator features that the imidazole and urea are used to make the tissue plasminogen activator 'Ruitipu enzyme' be correctly folded in order to have activity and make it be renaturated, separated and purified simultaneously.