436results about How to "Low antigenicity" patented technology

This invention provides a fibrin sealant bandage, wherein said fibrin sealant may be supplemented with at least one composition selected from, for example, one or more regulatory compounds, antibody, antimicrobial compositions, analgesics, anticoagulants, antiproliferatives, anti-inflammatory compounds, cytokines, cytotoxins, drugs, growth factors, interferons, hormones, lipids, demineralized bone or bone morphogenetic proteins, cartilage inducing factors, oligonucleotides polymers, polysaccharides, polypeptides, protease inhibitors, vasoconstrictors or vasodilators, vitamins, minerals, stabilizers and the like. Also disclosed are methods of preparing and / or using the unsupplemented or supplemented fibrin sealant bandage.

This invention provides a fibrin sealant dressing, wherein said fibrin sealant may be supplemented with at least one composition selected from, for example, one or more regulatory compounds, antibody, antimicrobial compositions, analgesics, anticoagulants, antiproliferatives, antiinflammatory compounds, cytokines, cytotoxins, drugs, growth factors, interferons, hormones, lipids, demineralized bone or bone morphogenetic proteins, cartilage inducing factors, oligonucleotides polymers, polysaccharides, polypeptides, protease inhibitors, vasoconstrictors or vasodilators, vitamins, minerals, stabilizers and the like. Also disclosed are methods of preparing and / or using the unsupplemented or supplemented fibrin sealant dressing.

The present invention provides antibody antagonists against proprotein convertase subtilisin / kexin type 9a (“PCSK9”) and methods of using such antibodies.

A method of cutting tissue material of biology origin employs a plotted water-jet or RF cutting system. The cutting system is computer controlled and includes a water-jet or RF cutting means combined with a motion system. The cutting energy is selected so that communication of thermal energy into the segment beyond the edge is minimized to avoid damaging the segment adjacent the edge.

A method for promoting autogenous ingrowth of damaged or diseased tissue selected from a group consisting of ligaments, tendons, muscle and cartilage, the method comprising a step of surgically repairing the damaged or diseased tissue by attachment of a tissue graft, wherein the tissue graft is formed from a segment of connective tissue protein after an acellularization process, the segment being crosslinked with genipin, its analog or derivatives. The genipin-fixed acellular tissue provides a microenvironment for tissue regeneration adapted for use as a biological implant device due to its low cytotoxicity.

A terminally modified polymer is provided herein. At least one terminus of the polymer is —O—(CH2)2-LM or —O—CH2—CH(OH)—CH2—CR1═CR2R3. LM, R1, R2, and R3 are defined herein Also disclosed are terminal conjugates comprising the polymer and a pharmaceutically useful modifier, as well as compositions comprising the conjugates, methods of their preparation, and methods of treating various disorders with the conjugates or their compositions.

The invention relates to an injection anticancer long circulating targeting liposome which is characterized in that anti-angiogenic drug is combined with anticancer drug, the liposome modified by polypeptide with tumor targeting function and hydrophilic polyethyleneglycol is adopted for loading and transporting the two drugs to tumor positions, and the tumor curative effect is enhanced through the different releasing rates and action mechanism of the two drugs.

The invention discloses a decellularized pericardial tissue via chemical treatment with cholic acid or bile salts as a medical device and process of manufacture.

PCT No. PCT / JP97 / 04387 Sec. 371 Date Jun. 4, 1999 Sec. 102(e) Date Jun. 4, 1999 PCT Filed Dec. 2, 1997 PCT Pub. No. WO98 / 24385 PCT Pub. Date Jun. 11, 1998The present invention provides an artificial blood vessel provided with collagen layer composed of ultra-fine fibers on at least the outside of a tube composed of a supporting framework material, and a method for producing the same. The present invention offers advantages such that its materials are easily acquired, it causes very little rejection after being transplanted into the body, it allows sutures to be maintained for a long time after transplant, and all or a portion is absorbed and degraded in the body after a predetermined period of time.

A venous valve device and method of formation are described to provide antegrade blood flow in the deep venous vessels of the leg or in other venous vessels of the body having incompetent or irreversibly dysfunctional valves. The venous valve device is made of a sheet of biocompatible material, comprising a longitudinal wire-frame structure that is a continuous seamless wire loop and plural anchoring mesh-lattice wing members spaced apart and connected to the base of the wire-frame structure.

The invention provides fibronectin-based binding molecules and methods for introducing donor CDRs into a fibronectin-based binding scaffold, in particular, Fn3. The fibronectin-based binding molecules of the invention may be further conjugated to another moiety, for example, Fc, anti-FcRn, HSA, anti-HSA, and PEG, for improved half life and stability, particularly in mammalian cells. The invention also provides methods for screening such molecules for binding to a target antigen as well as the manufacture and purification of a candidate binder.

The invention relates to a bracket material used for an osseous tissue project, and a preparation method thereof. Firstly, the bracket of a type I collagen is extracted from a small fresh pigskin by a mature extracting technique. Then, the bracket is further expanded in a Tris cushion liquid, the pH of which is equal to 8.8 to obtain a natural porous collagen bracket by the treatments of freezing and drying. The bracket is respectively and repeatedly mineralized in a CaCl2 liquid and in (NH4)2HPO4 liquid or mineralized in simulated body fluid for a long period to lead the weakly crystallized HA to be uniformly settled into the collagen bracket; and then a pigskin collagen-hydroxyapatite ossein is obtained by the treatments of freezing and drying to replace the natural bracket material. The invention not only maintains the natural bracket structure of the collagen in an organism, but also has the advantages of low material cost, simple devices, short period and easy operation. The obtained compound bracket material used for the pigskin collagen-hydroxyapatite osseous tissue project has the characteristics of high intensity, large toughness, non-antigenicity, higher biological activity as well as degradation and releasing control.

The invention relates to a guided tissue regeneration membrane, which comprises a compact coating and a loose coating, wherein the compact coating is composed of collagen-I or collagen-I composite hyaluronic acid; and the loose coating is composed of collagen-I or collagen-I composite calcium salt. A preparation method of the guided tissue regeneration membrane comprises the following steps of: preparing a collagen solution or a collagen and hyaluronic acid mixed solution by the use of acetic acid; injecting the solution into a self-made die, and drying it in the air to prepare the compact coating; injecting the collagen solution or a mixed liquor of the collagen solution and calcium salt onto the compact coating, and uniformly spreading; precooling the die at ultralow temperature, followed by freeze-drying to prepare the guided membrane with the compact coating and loose coating structure; carrying out vacuum high-temperature crosslinking and chemical crosslinking; and finally cleaning. The regeneration membrane has good histocompatibility and mechanical strength, low antigenicity and strong guided tissue regeneration capability. Its degradation rate in vivo is 3-8 months. The method is easy to operate, is suitable for automatic and continuous large-scale production, and solves the problems of large size of collagen membrane and material uniformity during industrial production.

The present invention relates to antibodies targeting complement protein C5 and compositions and methods of use thereof.

The invention discloses a method of using acellular bovine pericardia fixed with genipin as a surgical-repair material to fix an abdominal wall defect.

A new root canal filling point which is physicochemically stable, is not toxic to periapical tissue, can be sterilized and x-rayed; and has high elasticity and fracture resistance which enables the root canal filling point to be pressure-inserted into an even narrow or curved root canal. The root canal filling point is made of a copolymer consisting of propylene and ethylene, and a contrast medium.

The present invention relates to bispecific molecules that are characterized by having a first binding domain which binds an antigen present in the circulation of a mammal and a second binding domain which binds the C3b-like receptor (known as complement receptor 1 (CR1) or CD35 in primates). The bispecific molecules do not consist of a first monoclonal antibody to CR1 that has been chemically cross-linked to a second monoclonal antibody. The invention also relates to methods of making the bispecific molecules and therapeutic uses thereof, as well as to kits containing the bispecific molecules. The invention further provides polyclonal populations of bispecific molecules, which comprise populations of bispecific molecules with different antigen recognition specificities. Such polyclonal populations of bispecific molecules can be used for targeting multiple epitopes of a pathogenic antigenic molecule and / or multiple variants of a pathogenic antigenic molecule.

The invention discloses an electrostatic spinning nanofiber-extracellular matrix composite material as well as a preparation method and application thereof. The preparation method is simple and feasible in steps, and large-sized equipment is not needed. The prepared composite material has the advantages of electrostatic spinning nanofibers and an extracellular matrix. Compared with a pure electrostatic spinning nanofiber material or a pure extracellular matrix, the composite material has very high biocompatibility and very high mechanical property, is easier for cell adhesion and proliferation, has very good application prospect and high practical value in mechanical tissue engineering repair, and can be used for effectively promoting the adhesive growth, proliferation, migration and differentiation and amplifying and culturing stem cells on a large scale. Moreover, the composition material is low in antigenicity, and the risk of disease transmission is eliminated by means of strict screening.

The invention discloses biological ink material for 3D printing and a preparation method and application thereof. The biological ink material is prepared by, by mass concentration percentage, 5-18% of biological macromolecules, 76-93.5% of water or 76-93.5% of pre-crosslinking agent, and 1.5-6% of coagulant, wherein the sum of the mass concentration percentage of the above raw materials is 100%. The biological ink material is characterized in that water washing and crosslinking are performing for shaping after printing. The biological ink material has the advantages that the biological ink material can be easily squeezed out during printing, does not block printing needles and can be easily shaped after being squeezed out; the biological ink material is low in antigenicity in the bodies of organisms, low in caused rejection reaction, biodegradable, nontoxic to the organisms and high in safety.

This invention provides supplemented tissue sealants, methods for their production and use thereof. Disclosed are tissue sealants supplemented with at least one cytotoxin or cell proliferation inhibiting composition. The composition may be further supplemented with, for example, one or more antibodies, analgesics, anticoagulants, anti-inflammatory compounds, antimicrobial compositions, cytokines, drugs, growth factors, interferons, hormones, lipids, deminearlized bone or bone morphogenetic proteins, cartilage inducing factors, oligonucleotides polymers, polysaccharides, polypeptides, protease inhibitors, vasoconstrictors or vasodilators, vitamins, minerals, stabilizers and the like.

A system and method of packaging a bone allograft for use in a future medical procedure in which the bone allograft is stored in a saturated saline solution in an airtight container. The saline solution keeps the allograft hydrated and may be saturated with a combination of calcium, phosphate, or magnesium to inhibit mineral leaching out of the allograft during storage. The container may be deformable to conform to the shape of the allograft material as the container is “shrink-fitted” to the allograft. Optionally, the bone allograft may also be freeze-dried prior to placement in the container.

The present invention relates to an antibody against C5, and a method for preventing and treating complement-related diseases using the antibody, wherein the antibody against C5 is effectively usable in preventing and treating complement-related diseases by inhibiting complement activation.