1501results about "Epidermal cells/skin cells" patented technology

The present invention relates to a method for isolating stem / progenitor cells from the amniotic membrane of umbilical cord, wherein the method comprises separating the amniotic membrane from the other components of the umbilical cord in vitro, culturing the amniotic membrane tissue under conditions allowing cell proliferation, and isolating the stem / progenitor cells from the tissue cultures. The isolated stem cell cells can have embryonic stem cell-like properties and can be used for various therapeutic purposes. In one embodiment, the invention relates to the isolation and cultivation of stem cells such as epithelial and / or mesenchymal stem / progenitor cells under conditions allowing the cells to undergo mitotic expansion. Furthermore, the invention is directed to a method for the differentiation of the isolated stem / progenitor cells into epithelial and / or mesenchymal cells.

The invention is directed to substantially purified amnion-derived cell populations, compositions comprising the substantially purified amnion-derived cell populations, and to methods of creating such substantially purified amnion-derived cell populations, as well as methods of use. The invention is further directed to antibodies, in particular, monoclonal antibodies, that bind to amnion-derived cells or, alternatively, to one or more amnion-derived cell surface protein markers. The invention is further directed to methods for producing the antibodies, methods for using the antibodies, and kits comprising the antibodies.

A cultured skin and a grafting cultured skin sheet are provided, each of which is a cultured reconstructive skin with a high take rate using cells collectable from cells originated from tissue included in an umbilical cord such as tissue included in an umbilical cord originated from a human fetus. The grafting cultured skin stratified sheet is prepared by placing an epithelium sheet on the top surface of a cultured dermis. The cultured dermis includes as components a cultured skin containing cells originated from a tissue included in an umbilical cord, such as umbilical cells, more concretely, umbilical fibroblast cells, being separated and cultured, preferably in a collagen nonwoven fabric. On the other hand, the epithelium sheet is prepared by culturing and stratifying the umbilical cord epithelium cells.

The present invention relates to a biocompatible, three-dimensional scaffold useful to grow cells and to regenerate or repair tissue in predetermined orientations. The scaffold is particularly useful for regeneration and repair of cardiac tissue. The scaffold contains layers of alternating A-strips and S-strips, wherein the A-strips within each layer are aligned parallel to each other and preferentially promote cellular attachment over attachment to the S-strips. Methods of producing and implanting the scaffold are also provided.

The present invention relates to a skin equivalent and a method for producing the same, wherein the skin equivalent comprises a scaffold and stem / progenitor cells isolated from the amniotic membrane of umbilical cord. These stem / progenitor cells may be mesenchymal (UCMC) and / or epithelial (UCEC) stem cells, which may then be further differentiated to fibroblast and keratinocytes. Further described is a method for isolating stem / progenitor cells from the amniotic membrane of umbilical cord, wherein the method comprises separating the amniotic membrane from the other components of the umbilical cord in vitro, culturing the amniotic membrane tissue under conditions allowing cell proliferation, and isolating the stem / progenitor cells from the tissue cultures. The invention also refers to therapeutic uses of these skin equivalents. Another aspect of the invention relates to the generation of a mucin-producing cell using stem / progenitor cells obtained from the amniotic membrane of umbilical cord and therapeutic uses of such mucin-producing cells. In yet another aspect, the invention relates to a method for generating an insulin-producing cell using stem / progenitor cells isolated from the amniotic membrane of umbilical cord and therapeutic uses thereof. The invention further refers to a method of treating a bone or cartilage disorder using UCMC. Furthermore, the invention refers to a method of generating a dopamin and tyrosin hydroxylase as well as a HLA-G and hepatocytes using UCMC and / or UCEC. The present invention also refers to a method of inducing proliferation of aged keratinocytes using UCMC.

A method of carrying out an autologous tissue implant in a subject in need thereof is carried out by: (a) forming an autologous tissue implant from autologous cells collected from a subject (e.g., by ink-jet printing, the autologous cells and the scaffold, separately or together), and then (b) implanting the autologous tissue implant in said subject.

A method for preparing a tissue culture insert that is used for constructing a transplantable graft of an engineered tissue equivalent comprising living main functional cells, stromal cells and tissue matrix on / in a biological supporting membrane for treatment of body tissue defects.

The present invention relates in part to methods for producing tissue-specific cells from patient samples, and to tissue-specific cells produced using these methods. Methods for reprogramming cells using RNA are disclosed. Therapeutics comprising cells produced using these methods are also disclosed.

RNA prepared by in vitro transcription using a polymerase chain reaction (PCR)-generated template can be introduced into a cell to modulate cell activity. This method is useful in de-differentiating somatic cells to pluripotent, multipotent, or unipotent cells; re-differentiating stem cells into differentiated cells; or reprogramming of somatic cells to modulate cell activities such as metabolism. Cells can also be transfected with inhibitory RNAs, such as small interfering RNA (siRNA) or micro RNA (miRNA), or combinations thereof to induce reprogramming of somatic cells. For example, target cells are isolated from a donor, contacted with one or more RNA's causing the cells to be de-differentiated, re-differentiated, or reprogrammed in vitro, and administered to a patient in need thereof. The resulting cells are useful for treating one or more symptoms of a variety of diseases and disorders, for organ regeneration, and for restoration of the immune system.

The present invention provides methods to promote the differentiation of pluripotent stem cells into insulin producing cells. In particular, the present invention provides a method to increase the expression of NGN3 and NKX6.1 in populations of cells expressing markers characteristic of the pancreatic endocrine lineage.

Described are methods for isolating / purifying and expanding animal stem cells and stem-cell-like cells. Isolation methods include conditions comprising preferentially digesting non-stem cells and non-stem-cell-like cells in a population and preferentially adhering stem cells and stem-cell-like cells in a population. Expansion methods include culturing such cells under conditions comprising modulation of TGF-β signaling, inhibition of cell signaling mediated by p38 MAP kinase using small molecular weight inhibitors, expansion of the cells on human amniotic epithelial cells as feeder layers, control of cell seeding density, control of levels of Ca2+ in the culture media, rapid adhesion on a substrate or by a combination of such conditions. More particularly, what is disclosed relates to methods and systems for expanding animal cells in ex vivo cell cultures, while preventing cellular differentiation, and selectively enriching stem cells. The embodiments also disclose a culture system for ex vivo expansion of limbal epithelial cells or mesenchymal cells, as well as surgical grafts made there from.

A method of isolating epithelial cells from a human skin tissue or internal organ tissue using trypsin and ethylenediamine tetraacetic acid (EDTA) simultaneously with the application of magnetic stirring, a method of preconditioning isolated biological cells by the application of physical stimulus, i.e., strain, are provided. Epithelial cells can be isolated by the method with increased yield, colony forming efficiency (CFE), and colony size. Also, the increased percentage of stem cells in isolated cells is advantageous in therapeutic tissue implantation by autologous or allogeneic transplantation. In skin cells preconditioned by the application of strain, cell division is facilitated, and the secretion of extracellular matrix components and growth factors and the activity of matrix metalloproteinases (MMPs) are improved. When preconditioned cells are implanted by autologous or allogeneic transplantation to heal a damaged tissue, the improved cell adhesion, mobility, and viability provides a biological adjustment effect against a variety of stresses or physical stimuli which the cells would undergo after implantation, with improved capability of integration into host tissue, thereby markedly improving the probability of success in skin grafting.

The present invention relates to a biocompatible, three-dimensional scaffold useful to grow cells and to regenerate or repair tissue in predetermined orientations. The scaffold is particularly useful for regeneration and repair of cardiac tissue. The scaffold contains layers of alternating A-strips and S-strips, wherein the A-strips within each layer are aligned parallel to each other and preferentially promote cellular attachment over attachment to the S-strips. Methods of producing and implanting the scaffold are also provided.

The invention relates to a skin / hair equivalent, more particularly a hair model with reconstructed papillae (pseudopapillae; PP) in a reconstructed dermis (pseudodermis; PD), to its production and to its use, more particularly for medical / pharmaceutical purposes and for application in the cosmetics industry.

A biological tissue sheet which is expected as exerting a favorable therapeutic effect and a high safety in transplantation. The biological tissue sheet formed by (a) preparing in vivo-derived cells; (b) sowing the in vivo-derived cells on amniotic membrane; and (c) culturing and proliferating the in vivo-derived cells in the absence of any xenogeneic animal cells. As the cells of a biological origin, for example, cells originating in corneal epithelium, conjunctival epithelium, skin epidermis, hair follicle epithelium, oral mucosa, respiratory tract mucosa, or intestinal tract mucosa.

A stem-cell-seeded porous scaffold implant and methods for treating a breast tissue defect in a patient.

Bioengineered constructs are formed from cultured cells induced to synthesize and secrete endogenously produced extracellular matrix components without the requirement of exogenous matrix components or network support or scaffold members. The bioengineered constructs of the invention can be treated in various ways such that the cells of the bioengineered constructs can be devitalized and / or removed without compromising the structural integrity of the constructs. Moreover, the bioengineered constructs of the invention can be used in conjunction with biocompatible / bioremodelable solutions that allow for various geometric configurations of the constructs.

Three-dimensional tissue-like organization of cells by high cell-seeding-density culture termed as macromass culture is described. By macromass culture, cells can be made to organize themselves into a tissue-like form without the aid of a scaffold and three-dimensional macroscopic tissue-like constructs can be made wholly from cells. Tissue-like organization and macroscopic tissue-like constructs can be generated from fibroblastic cells of mesenchymal origin (at least), which can be either differentiated cells or multipotent adult stem cells. In this work, tissue-like organization and macroscopic tissue-like constructs have been generated from dermal fibroblasts, adipose stromal cells-derived osteogenic cells, chondrocytes, and from osteoblasts. The factor causing macroscopic tissue formation is large scale culture at high cell seeding density per unit area or three-dimensional space, that is, macromass culture done on a large scale. No scaffold or extraneous matrix is used for tissue generation, the tissues are of completely cellular origin. No other agents (except high cell-seeding-density) that aid in tissue formation such as tissue-inducing chemicals, tissue-inducing growth factors, substratum with special properties, rotational culture, etc, are employed for tissue formation. These tissue-like masses have the potential for use as tissue replacements in the human body. Tissue-like organization by high cell-seeding-density macromass culture can also be generated at the microscopic level.

Engineered animal skin, hide, and leather comprising a plurality of layers of collagen formed by cultured animal collagen-producing (e.g., skin) cells. Layers may be formed by elongate multicellular bodies comprising a plurality of cultured animal cells that are adhered and / or cohered to one another; wherein the elongate multicellular bodies are arranged to form a substantially planar layer for use in formation of engineered animal skin, hide, and leather. Further described herein are methods of forming engineered animal skin, hide, and leather utilizing said layers of animal collagen-producing cells.

The invention is directed to methods for the treatment of wounds. Such methods utilize novel compositions, including but not limited to amnion-derived multipotent cells (herein referred to as AMP cells), conditioned media derived therefrom (herein referred to as amnion-derived cellular cytokine suspension or ACCS), cell lysates derived therefrom, cell products derived therefrom, each alone or in combination.

Cells, compositions, and methods of cell therapy for administering a therapeutically effective amount of stem cells or cell concentrate to achieve accelerated wound healing of normal and chronic wounds, while minimizing the formation of scar tissue.

Disclosed is a cervico-vaginal tissue equivalent comprised of vaginal epithelial cells and immune cells, cultured at the air-liquid interface. The tissue equivalent is capable of being infected with a sexually transmitted pathogen such as a virus (e.g., HIV), a bacteria, a helminthic parasite, or a fungus. The tissue equivalent is also capable of undergoing an allergic-type reaction or an irritant-type reaction. The tissue equivalent is characterized as having nucleated basal layer cells and nucleated suprabasal layer cells, and further as having cell layers external to the suprabasal layer progressively increasing in glycogen content and progressively decreasing in nuclei content. Immune cells of the tissue equivalent are primarily located in the basal and suprabasal layers. Also disclosed are methods for producing the tissue equivalent. The methods involve providing vaginal epithelial cells and immune cells, seeding the cells onto a porous support, and co culturing the seeded cells at the air-liquid interface under conditions appropriate for differentiation. One such method disclosed is for generation of the tissue equivalent in serum free medium. Specific cells from which the tissue equivalent is generated, and also specific preferred components of the medium in which the tissue equivalent is generated are provided. Also disclosed is a cervico-vaginal tissue equivalent produced by the methods disclosed herein.

Improvements are made to a novel media that replace the requirement for all protein growth factors by the addition to the medium of physiological concentrations of retinyl acetate. The media are serum-free, companion cell or feeder layer-free and organotypic, matrix free solutions for the cultivation of clonally competent basal keratinocytes. The media and methods are useful in the production of epidermal epithelial tissue that is suitable for skin grafting.

A biological preparation including genetically modified cells together with biocompatible matrices and methods of use thereof are provided. The biological preparation is useful in treating a subject at risk for or suffering from a disease in a controllable dosage and time-dependent manner, and for in vitro and in vivo screening of candidate drug therapies

A population of embryonic epithelial cells produced in vitro from embryonic stem cells. In one embodiment, at least 45% of the cells express cytokeratin, for example, cytokeratin-7.

The present invention relates to in vitro cultured skin substitutes, and in particular to improved methods for organotypic culture of skin substitutes. In some embodiments, the dermal equivalent of the skin substitute is lifted to air interface of the culture prior to seeding with keratinocytes. In other embodiments, increased concentrations of collagen are used to form the dermal equivalent. In still other embodiments, optimized media are utilized to maintain the skin equivalents.

Embodiments of the present invention provide Dermal Micro Organs (DMOs), methods and apparatuses for producing the same. Some embodiments of the invention provide a DMO including a plurality of dermal components, which substantially retain the micro-architecture and three dimensional structure of the dermal tissue from which they are derived, having dimensions selected so as to allow passive diffusion of adequate nutrients and gases to cells of the DMO and diffusion of cellular waste out of the cells so as to minimize cellular toxicity and concomitant death due to insufficient nutrition and accumulation of waste in the DMO. Some embodiments of the invention provide methods and apparatuses for harvesting the DMO. An apparatus for harvesting the DMO may include, according to some exemplary embodiments, a support configuration to support a skin-related tissue structure from which the DMO is to be harvested, and a cutting tool able to separate the DMO from the skin-related tissue structure. Other embodiments are described and claimed.