2328 results about "Cell-Extracellular Matrix" patented technology

A bioprosthetic device is provided for soft tissue attachment, reinforcement, and or reconstruction. The device comprises a naturally occurring extracellular matrix portion and a three-dimensional synthetic portion. In illustrated embodiments, the naturally occurring extracellular matrix portion comprises layers of small intestine submucosa, and the three-dimensional synthetic portion comprises a foam or a three-dimensional mesh, textile, or felt.

Described are medical devices useful for applying a bolster material to a surgical fastening device such as a stapler, and related methods of manufacture and use. The devices include an applicator element for receipt between arms of the stapler, and a bolster material, desirably a remodelable extracellular matrix material, coupled to the applicator element. In certain embodiments, the bolster material is held by the applicator element, for example having at least a portion looped around or received through or over a portion of the applicator element. Also described are unique implantable materials including coatings of dried, reversible adhesive.

Unitary surgical devices (10) are disclosed. One group of the illustrated devices has a pair of biocompatible, bioresorbable anchors (16, 18) connected to fixed lengths suture. The anchors (16, 18) and fixed length of suture are connected to each other prior to surgery. Another group of unitary surgical devices has a pair of fixating mechanisms (15, 17) connected to a base (21) prior to surgery. The second group of illustrated devices generally includes extracellular matrix material either as part of the base (21) or supported on the base (21). The extracellular matrix material serves as tissue regenerating material. In the second group of unitary surgical devices, the fixating mechanisms illustrated generally comprise suture, anchors or pre-formed holes in the base. All of the illustrated unitary surgical devices are useful in repairing a damaged meniscus. The first group of unitary surgical devices can be used to approximate inner surfaces of a tear in the meniscus. The second group of devices can be used either as an insert to be placed between and approximated to the inner surfaces of the tear or as an insert to replace a void in the meniscus left after a menisectomy.

Bioprosthetic devices for soft tissue attachment, reinforcement, or construction are provided. The devices comprise a sheet of naturally occurring extracellular matrix and a sheet of synthetic mesh coupled to the naturally occurring extracellular matrix portion.

Methods and devices for transmitting micromechanical forces locally to induce surface convolutions into tissues on the millimeter to micron scale for promoting wound healing are presented. These convolutions induce a moderate stretching of individual cells, stimulating cellular proliferation and elaboration of natural growth factors without increasing the size of the wound. Micromechanical forces can be applied directly to tissue, through biomolecules or the extracellular matrix. This invention can be used with biosensors, biodegradable materials and drug delivery systems. This invention will also be useful in pre-conditioned tissue-engineering constructs in vitro. Application of this invention will shorten healing times for wounds and reduce the need for invasive surgery.

The application of matrix metalloproteinase (MMP) inhibitors to the skin inhibits the degradation of proteins found in the skin including collagen, elastin, and other basement membrane and extracellular matrix protein. MMP inhibitors may be used in both cosmetic compositions and pharmaceutical compositions for application to skin. MMP inhibitors are formulated with a cosmetically suitable vehicle or pharmaceutically acceptable excipient for application to the skin as creams, lotions, ointments, solutions, face masks, etc. As cosmetics, the inventive MMP inhibitor compositions are applied to the skin to prevent or reduce the appearance of wrinkles, pigmentation changes, loss of elasticity, or other effects associated with aging or sun damage. As pharmaceuticals, the inventive MMP inhibitor compositions may also be applied to the skin to treat or prevent a skin disease (e.g., proliferative disease, inflammatory disease).

The present invention relates generally to decellularized extracellular matrix of conditioned body tissues. The decellularized extracellular matrix contains a biological material, preferably vascular endothelial growth factor (VEGF), produced by the conditioned body tissue that is in an amount different than the amount of the biological material that the body tissue would produce absent the conditioning. The invention also relates to methods of making and methods of using said decellularized extracellular matrix. Specifically, the invention relates to treating defective, diseased, damaged or ischemic cells, tissues or organs in a subject by administering, injecting or implanting the decellularized extracellular matrix of the invention into a subject in need thereof. The invention is further directed to a tissue regeneration scaffold for implantation into a subject inflicted with a disease or condition that requires tissue or organ repair, regeneration and/or strengthening. Additionally, the invention is directed to a medical device, preferably a stent or an artificial heart, having a surface coated or covered with the decellularized extracellular matrix of the invention or having a component comprising the decellularized extracellular matrix of the invention for implantation into a subject, preferably a human. Methods for making the tissue regeneration scaffold and methods for manufacturing a coated or covered medical device having a component comprising decellularized extracellular matrix of conditioned body tissues are also provided.

Implantable medical device eluting drug locally and in prolonged period is provided, including several types of such a device, the treatment modes of implementation and methods of implantation. The device comprising of polymeric substrate, such as a matrix for example, that is used as the device body, and drugs, and in some cases additional scaffolding materials, such as metals or additional polymers, and materials to enhance visibility and imaging. The selection of drug is based on the advantageous of releasing drug locally and in prolonged period, where drug is released directly to the extracellular matrix (ECM) of the diseased area such as tumor, inflammation, degeneration or for symptomatic objectives, or to injured smooth muscle cells, or for prevention. One kind of drug is the gene silencing drugs based on RNA interference (RNAi), including but not limited to si RNA, sh RNA, or antisense RNA/DNA, ribozyme and nucleoside analogs. The modes of implantation in some embodiments are existing implantation procedures that are developed and used today for other treatments, including brachytherapy and needle biopsy. In such cases the dimensions of the new implant described in this invention are similar to the original implant. Typically a few devices are implanted during the same treatment procedure.

Mastopexy and breast reconstruction prostheses and implantation method that allow for radiographic imaging of the breast tissue. The prostheses are arcuate and elongate optionally meshed to conform with breast tissue when implanted. Prostheses are made from naturally occurring extracellular matrix, primarily collagen, that, allows for mammographic imaging without interference as is expected from synthetic materials.

An endoluminal device comprises a stent and a tubular graft supported by the stent. The graft has a proximal and a distal opening and comprises a synthetic material and a bioremodelable material. The bioremodelable material is disposed on an exterior surface in at least one band adjacent at least one of the proximal and distal openings.

New methods for producing tissue engineered constructs and engineered native tissues are disclosed. The methods include producing a tissue engineered construct by growing cells in vitro on a substrate and then decellularizing the construct to produce a decellularized construct consisting largely of extracellular matrix components. The construct can be used immediately or stored until needed. The decellularized construct can be used for further tissue engineering, which may include seeding the construct with cells obtained from the intended recipient of the construct. During any of the growth phases required for production of the construct, the developing construct may be subjected to various tissue engineering steps such as application of mechanical stimuli including pulsatile forces. The methods also include producing an engineered native tissue by harvesting tissue from an animal or human, performing one or more tissue engineering steps on the tissue, and subjecting the tissue to decellularization. The decellularized, engineered native tissue may then be subjected to further tissue engineering steps.

Compositions of the invention for regenerating defective or absent myocardium comprise an emulsified or injectable extracellular matrix composition. The composition may also include an extracellular matrix scaffold component of any formulation, and further include added cells, proteins, or other components to optimize the regenerative process and restore cardiac function. Methods for regenerating defective or absent myocardium apply a composition to a site of myocardium in need of regeneration using a delivery mode appropriate for the particular formulation.

The present invention provides adipose-derived stem cells and lattices. In one aspect, the present invention provides a lipo-derived stem cell substantially free of adipocytes and red blood cells and clonal populations of connective tissue stem cells. The invention also provides a method of isolating stem cells from adipose tissues. The cells can be employed, alone or within biologically-compatible compositions, to generate differentiated tissues and structures, both in vivo and in vitro. Additionally, the cells can be expanded and cultured to produce hormones and to provide conditioned culture media for supporting the growth and expansion of other cell populations. In another aspect, the present invention provides a lipo-derived lattice substantially devoid of cells, which includes extracellular matrix material from adipose tissue. The lattice can be used as a substrate to facilitate the growth and differentiation of cells, whether in vivo or in vitro, into anlagen or even mature tissues or structures.

A multi-layered microcapsule has an inner extracellular matrix and an outer shell. The inner extracellular matrix includes a first inner layer of biopolymer and a second intermediate layer of polymer that provides partial immune-protection and holds the first layer in place. The outer shell can form an exoskeleton to provide mechanical stability. Each of the individual layers can be varied to optimize mechanical stability, cell function, and immuno-protection.

The present invention is directed to vascular implants and methods for fabricating the same. The implantable devices include but are not limited to stents, grafts and stent grafts. The devices may include a biomaterial, such as an extracellular matrix, coated or attached to at least a portion of the device. The devices may be constructed of a single woven wire to form at least a main lumen having proximal and distal ends. In many embodiments, the devices include one or more side branch lumens interconnected with the main lumen.

The invention relates to the field of bio-materials, and especially relates to an acellular matrix repairing gel and a new method for preparing the same. The invention discloses the acellular matrix repairing gel and the method for preparing the same, wherein the method includes steps of acellular treatment and gelatinization treatment on tissue and organs from mammal animals to prepare the acellular matrix repairing gel. The acellular matrix repairing gel is eliminated in immunogenicity of heterologous and foreign tissue, so that activity of extracellular matrix components of the tissue is maintained as more as possible. The gel can specially repair damaged tissue and organs of human body, is strong in applicability, is suitable for requirements of various irregular-shaped repair zones and different position environments in body and has a huge clinical value.

This invention relates to a lamellae tissue layer, comprising a grooved silk fibroin substrate comprising tissue-specific cells. The silk fibroin substrates provides an excellent means of controlling and culturing cell and extracellular matrix development. A multitude of lamellae tissue layers can be used to create a tissue-engineered organ, such as a tissue-engineered cornea. The tissue-engineered organ is non-immunogenic and biocompatible.

The present invention provides systems, methods, and compositions for targeted delivery of a therapeutic agent organs, tissues, cells, extracellular matrix components, and intracellular compartments. The present invention provides a complex comprising a therapeutic or diagnostic agent and a nucleic acid targeting moiety, wherein the agent non-covalently associates with base pairs of the nucleic acid targeting moiety. The invention provides targeted particles comprising a particle and an inventive complex. The present invention provides methods of designing, manufacturing, and using inventive complexes and targeted particles.

The invention is directed to formation and use of electroprocessed collagen, including use as an extracellular matrix and, together with cells, its use in forming engineered tissue. The engineered tissue can include the synthetic manufacture of specific organs or tissues which may be implanted into a recipient. The electroprocessed collagen may also be combined with other molecules in order to deliver substances to the site of application or implantation of the electroprocessed collagen. The collagen or collagen/cell suspension is electrodeposited onto a substrate to form tissues and organs.

Described are methods and systems for modifying vascular valves in order to reduce retrograde blood flow through the valves. Preferred methods include connecting vascular valve leaflets with at least one remodelable material, such that the valve leaflets become fused by the ingrowth of the patient's native tissue. Preferred remodelable materials include collagenous extracellular matrix material, such as small intestine submucosa.