79results about How to "Promote tissue regeneration" patented technology

A suturable adhesion-preventing membrane has high suture strength, good biocompatibility, decomposition and absorption in a living body, sufficient adhesion-preventing effect, and desirable guided tissue regeneration. The membrane is composed of at least one non-woven fabric layer made of collagen fibers, or a laminated membranous substance consisting of at least one non-woven fabric layer made of collagen fibers and at least one sponge layer made of collagen, and a coating layer of gelatin or hyaluronic acid on the surface or surfaces of the above membrane. Preferably, the membrane comprises one to six compressed cross-linked collagen non-woven fabric layers wherein a layer has a fibers having a fiber diameter of 0.05 mm to 1.0 mm, a bulk density of 5.0×10−4 to 5 g / cm3 and a thickness of 0.1 mm to 50 mm, and a coating layer containing gelatin or hyaluronic acid and having a thickness of 0.05 mm to 20 mm, wherein the coating layer covers one or both sides or a part or whole of the surface of the membrane.

A medical device for drug delivery is provided which includes a stent structure and a biologically active structure attached to the stent structure. The biologically active structure is comprised of a plurality of layers, including a first layer having a first biologically active compound, such as an anti-proliferative, cytostatic or cytotoxic drug, for delivery at a first target site, such as the vascular tissue; a second layer having a second biologically active compound, such as a growth factor, for delivery into the arterial lumen and capable of promoting engraftment and differentiation of hematopoietic stem cells and / or endothelial progenitor cells at a second site of myocardial injury; and a third, middle layer which is substantially or selectively impermeable to both the first and second biologically active compounds.

The invention provides a composition for promoting regeneration of tissue which has degenerated in a subject as a result of a disease or disorder and a method of using the composition is provided. The composition comprises a biodegradable acellular matrix, and passaged autologous fibroblasts substantially free of immunogenic proteins, e.g., culture medium serum-derived proteins, integrated within the matrix. Also provided is an injectable composition comprising an acellular filler material (e.g., any type of collagen) and passaged autologous fibroblasts substantially free of immunogenic proteins, e.g., culture medium serum-derived proteins, for correcting defects in skin, such as wrinkles or scars, and for augmenting tissue in the subject, particularly facial tissue.

The present invention is directed to polymeric compositions comprising a biodegradable copolymer that possesses shape-memory properties and implantable devices (e.g., drug-delivery stents) formed of materials (e.g., a coating) containing such compositions. The polymeric compositions can also contain at least one non-fouling moiety, at least additional biocompatible polymer, at least one biobeneficial material, at least one bioactive agent, or a combination thereof. The polymeric compositions are formulated to possess good mechanical, physical and biological properties. Moreover, implantable devices formed of materials comprising such compositions can be delivered to the treatment site in a conveniently compressed size and then can expand to dimensions appropriate for their medical functions.

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.

Methods for wound healing or tissue regeneration by means of cell and tissue engineering, including using three-dimensional matrices with cells therein. A three-dimensional matrix, optionally containing cells such as fibroblasts, is inserted Into the wound of a subject. An anti-inflammatory factor may also be used to reduce or suppress the immune response. The wound may be covered to limit exposure to gaseous oxygen, for example, using a membrane. An anticoagulant may also be applied. In addition, cells, such as fibroblasts or stem cells, when cultured within a three-dimensional matrix, under certain conditions, can be induced to form non-fibroblast multipotent cells. When stem cells are cultured in the three-dimensional matrix, at least some of the stem cells remain as stem cells and do not differentiate. Kits for promoting the control of cells within three-dimensional matrices are also disclosed.

The invention provides polymer scaffolds for cell-based tissue engineering.

Implantable medical devices and prosthesis for rapid regeneration and replacement of tissues, and methods of making and using the devices, are described. The medical devices include a complex three-dimensional braided scaffold with a polymer composition and structure tailored to desired degradation profiles and mechanical properties. The composite three-dimensional braided scaffolds are braided from yarn bundles of biodegradable and bioresorbable polymeric fibers and / or filaments. Monofilament fibers and / or multifilament fibers can be twisted / plied in different combinations to form multifilament yarns, composite multifilament yarns, or composite yarns. The medical devices are useful as both structural prosthetics taking on the function of the tissue as it regenerates and as in vivo scaffolds for cell attachment and ingrowth.

A cell or tissue-culturing carrier which can effectively regenerate an intended a cell or tissue, while suppressing an excessive growth of fibroblasts, and a method of culturing a cell or tissue by using the above carrier, the cell or tissue-culturing carrier wherein fibroblasts showing substantially no growing property in a gel based on the hydrogel-forming polymer, is constituted by using a hydrogel-forming polymer; an aqueous solution of which shows a thermo-reversible sol-gel transition such that it assumes a sol state at a lower temperature and assumes a gel state at a higher temperature.

The invention describes families of compounds that utilize multihydroxyl phenyl groups to provide adhesive properties. Selection of the multihydroxy phenyl group along with linkers or linking groups and the linkages between the linkers or linking groups with polyalkylene oxides, provides materials that can be engineered to afford controllable curing time, biodegradation and / or swelling.

A method and apparatus for the concurrent treatment of multiple oral diseases and defects while promoting general oral hygiene utilizing electricity are provided for non-human animals. Electrodes are used to deliver an electrical current to the gingival tissues of a mouth in order to achieve a number of therapeutic, prophylactic, and regenerative benefits. These benefits include killing oral microbes, increasing oral vasodilation, reducing oral biofilm, improving oral blood circulation, reversing oral bone resorption, promoting oral osteogenesis, treating gum recession, and fostering gingival regeneration. Other benefits include the treatment of gingivitis, periodontitis, and oral malodor, and other systemic diseases correlated with oral pathogens.

A laser device is described for skin ablation treatment. The device comprises a laser source (5) and a handpiece (9). The laser beam has a Gaussian distribution of the power density to obtain different effects in the various regions exposed to the laser beam.

The present inventors revealed the following for the first time in the world:1) a large amount of bone marrow-derived cells are mobilized to grafted skin;2) the mobilized bone marrow-derived cells are differentiated into any of dermal fibroblasts, adipocytes, muscle cells, vascular endothelial cells, and epidermal keratinocytes in the grafted skin, and the mobilized bone marrow derived cells include bone marrow-derived mesenchymal stem cells;3) the factors which mobilize bone marrow-derived mesenchymal stem cells from peripheral blood to the grafted skin are HMGB1, HMGB2, and HMGB3 released from the necrosed tissue of recipient skin;4) purified HMGB1, HMGB2, and HMGB3 promote the migration of mesenchymal stem cells isolated and cultured from bone marrow;5) activators containing HMGB1 which allows the migration of bone marrow mesenchymal stem cells can be conveniently purified from several organ extracts including skin, brain, and heart;6) activators which allow the migration of bone marrow mesenchymal stem cells can be conveniently extracted from cultured cells; and7) a heparin-column purified fraction of skin extract mobilizes a large amount of bone marrow-derived cells in case of brain injury.

The invention provides a biocompatible article having a surface comprising collagen fibrils attached to said surface via one or more linker molecules, wherein each of said collagen fibrils is attached to at least one of said one or more linker molecules at a proximal end of the fibril, and wherein each of said collagen fibril has a proximal portion extending from said proximal end to a point P along said fibril, wherein, for a majority of said fibrils, each fibril at said point P is oriented so as to form an angle αP in the range of 0° to 45° to the surface normal N at the point of attachment of said fibril to said surface. The collagen fibril-coated surface has improved biocompatibility and is useful in a medical implant intended for implantation into soft tissue or bone tissue.

Methods and apparatus are provided for delivering a bioactive agent in a needle track formed in a target tissue mass, following formation of the needle track, by avoiding impingement of the agent against target tissue at high velocity or by using capillary action to draw the bioactive agent out of the needle during needle withdrawal. The apparatus comprises a catheter and a needle disposed within the catheter and configured to be selectively extended into the tissue mass to a predetermined depth, while dispensing the agent simultaneously with retraction of the needle along the needle track. Alternatively, or in addition, the needle may be configured to create a tissue space surrounding a distal or lateral surface of the needle, into which the bioactive agent to be infused.

A device for tissue reinforcement. The device has a macroporous structure. At least a section of the macroporous structure is coated with a microporous coating. The microporous and macroporous morphologies allow both cell in-growth and tissue integration.

Compositions containing purified collagen biomaterial derived from tissues, for example, insoluble amnion, soluble amnion, soluble chorion of the human placenta, are provided. The collagen compositions can be used to promote wound healing, promote tissue regeneration, prevent or reduce scarring, reduce local inflammation, minimize tissue rejection, promote graft integration. Methods for using the collagen composition as a biomaterial implant for dermal filling, skin grafting, and hair transplantation are also provided.

The present invention relates generally to minimally invasive, cost-effective, adaptable methods, systems, and devices used to repair anatomical joint conditions. The repair may be necessitated by trauma, disease or other conditions. The anatomical joint may specifically include mammalian joints such as the knee, shoulder, elbow, wrist, finger, hip, spine, toe and ankle, for example. The methods, systems, and devices disclosed herein include leveraging the significant (and often unappreciated) role the subchondral bone plays in the health status of the afflicted anatomical joint.

Expanded, nanofiber structures are provided as well as methods of use thereof and methods of making.

The present inventors assessed the possibility that bone marrow-derived cells are mobilized to the grafted skin from nonskin tissues and contribute to skin tissue regeneration during the engraftment of grafted skin on biological tissues. As a result, the present inventors for the first time in the world demonstrated that:(1) a large number of bone marrow-derived cells are mobilized to grafted skin;(2) mobilized bone marrow-derived cells differentiate into any of dermal fibroblasts, adipocytes, muscle cells, vascular endothelial cells, and epidermal keratinocytes in grafted skin, and thus mobilized bone marrow-derived cells include bone marrow-derived mesenchymal stem cells;(3) S100A8 and S100A9 released from necrotic tissues of grafted skin are responsible for mobilizing bone marrow-derived mesenchymal stem cells to the grafted skin from peripheral blood; and(4) purified S100A8 and S100A9 promote the migration of mesenchymal stem cells isolated / cultured from the bone marrow.

Provided are an injectable tissue adhesive hydrogel including gamma-cyclodextrin (γ-CD). When such an injectable tissue adhesive hydrogel including the γ-CD is used as a skin glue, based on a fact that the γ-CD has a bigger hydrophobic cavity than that of α- and β-CDs, the injectable tissue adhesive hydrogel including the γ-CD has stronger interactions than host-guest interactions. In addition, hydrogen bonding in the injectable tissue adhesive hydrogel including the γ-CD can improve both cohesiveness and adhesiveness of gelatin. The injectable tissue adhesive hydrogel including the γ-CD having excellent cell viability is used for adhesion of a skin incision, to thereby effectively promote tissue regeneration.

A hydrogel composition is formed from a natural polymer derivative having a plurality of cross-linkable units depending therefrom, and a synthetic polymer derivative having a plurality of cross-linkable units depending therefrom, said natural and synthetic polymer derivatives having hydrolysable units disposed between the polymer backbone of said derivative and at least some of said cross-linkable units. The use of a combination of natural and synthetic polymers provides for biodegradability of the hydrogel, along with mechanical properties such as strength and elasticity.

Implantable medical devices and prosthesis for rapid regeneration and replacement of tissues, and methods of making and using the devices, are described. The medical devices include a complex three-dimensional braided scaffold with a polymer composition and structure tailored to desired degradation profiles and mechanical properties. The composite three-dimensional braided scaffolds are braided from yarn bundles of biodegradable and bioresorbable polymeric fibers and / or filaments. Monofilament fibers and / or multifilament fibers can be twisted / plied in different combinations to form multifilament yarns, composite multifilament yarns, or composite yarns. The medical devices are useful as both structural prosthetics taking on the function of the tissue as it regenerates and as in vivo scaffolds for cell attachment and ingrowth.

Nanofiber segments and nanofiber microspheres are provided as well as methods of use thereof and methods of making.

The present invention provides a composite fiber which comprises an alginate fiber, a polymer material, an antibacterial agent, and a plasmid encoding growth factor-gene. The present invention also provides a wound dressing, wherein the wound dressing comprises a composite fiber as described above. The composite fibers prepared according to the present invention are capable of releasing the antibacterial agent and the growth factor gene, not only to reduce microorganism growth, but also to secrete growth factors in a wound site through transfection, thereby promoting wound healing.

This invention provides a preparation of traditional Chinese medicinal materials for the treatment of ulcerative colitis and the processed method thereof. The preparation of present invention is prepared from 1-10 wt % of Sanguis Draxonis, 15-40 wt % of Radix Paeoniae Rubra, 1-20 wt % of Indigo Naturalis, 1-10 wt % of Halloysitum Rubrum, 15-40 wt % of Catechu, 1-10 wt % of Calcined Alumen, 5-30 wt % of Rhizoma Bletillae and 1-10 wt % of Calamina. The processed method of the preparation comprises the steps of (a) decocting Radix Paeoniae Rubra, Catechu and Calcined Alumen with water; (b) mixing Indigo Naturalis and Sanguis Draxonis thoroughly, with PEG solution added; (c) mixing the sifted Rhizoma Bletillae, the above-mentioned aqueous decoction and the Indigo Naturalis and Sanguis Draxonis in PEG solution thoroughly, followed by adding Halloysitum Rubrum and Calamina thereto and grinding together, finally the enema is prepared after water being added. The enema of present invention is highly effective in the short- and long-term pharmacological treatment of ulcerative colitis.