Abstract:
El objetivo radica en un proceso de obtención de un compuesto de aspersión celular de fibroblastos y queratinocitos humanos y su uso como agente regenerativo de lesiones cutáneas, preferentemente de úlceras diabéticas, quemaduras de 1er, 2do y 3er grado, y un sustituto de la técnica de la utilización de colgajos. El proceso de obtención de un compuesto de aspersión celular de fibroblastos y queratinocitos humanos se comprende de las etapas de separación de la dermis y la epidermis, incubación de la capa epidermis, disgregación de la capa de dermis y proliferación de fibroblastos, disgregación de la capa de epidermis, proliferación de los queratinocitos en suspensión, preparación de la solución del agente reticulante de reacción de la solución de aspersión celular, y preparación de la solución de aspersión celular. Dicho compuesto de aspersión celular de fibroblastos y queratinocitos humanos aumenta la eficiencia de aplicación y la facilidad de la misma, con el fin de ser una alternativa económica, rápida y de fácil manejo.
Abstract:
In accordance with some preferred embodiments, without limitation, the present invention comprises compositions, methods and systems for preparation of stem-cell enriched cell populations from sources of biological materials by sorting cell types in relation to size.
Abstract:
The invention relates to the use of the CD 24 marker gene in mammals, such as the human CD24 human gene, for the transformation of keratinocyte stem cells when carrying out methods for preparing homogeneous batches of epidermal stem cells transformed in such a way that they contain an exogenous nucleotide sequence of interest, in addition to said transformed keratinocyte stem cells, epidermal tissue reconstituted from said keratinocytes and the uses thereof.
Abstract:
A method for growing stem cells comprising the steps of: providing stem cells with supporters said supporters being genetically modified in order to provide externally regulatable interactions between the supporters and the stem cells; supporters and stem cells are interchangeable upon genetic modification and interaction; applying an external signal for starting or stopping the interactions.
Abstract:
The invention of this disclosure relates to a method for producing composite skin comprising a dermis inoculated directly with mammalian cells. In the method of this invention a dermis is obtained, preferably an acellular dermis of xenogeneic or human origin. The cells used to inoculate the dermis are transferred directly or preselected for properties consistent with progenitor or stem cell. The cells are of xenogeneic or human origin. In the practice of the preferred embodiments of this invention cells inoculated on the dermis are allowed to propagate ex vivo in culture to increase their number. In the preferred embodiment of this invention the ex vivo culturing results in the expansion of a population of cells having progenitor characteristics. The cells used to inoculate the dermis, in the preferred embodiments of this invention are genetically modified ex vivo. In the most preferred method of this invention the dermis to be inoculated is of human origin. In this embodiment the cells are either autologous or allogeneic in origin or a combination of both. The inoculated human dermis of this preferred embodiment can be applied to a human or utilized ex vivo as a laboratory assay.
Abstract:
This invention relates to a culture system for the growth of epidermal keratinocyte stem cells comprising, a. processing the feeder cells economically with Mitomycin C; and b. providing a substratum in the form of such feeder cells; c. achieving better growth stimulation of epidermal keratinocyte stem cell growth than γ-irradiated feeder cells; characterized in that the optimal concentration of mitomycin C is combined further with respect to the dose per cell to derive a range of concentration-dose permutations, where the concentration of mitomycin C is in the range of 3 to 10 μg per ml and the dose is in the range of 15 to 450 pg per cell.
Abstract:
La présente invention se rapporte à la mise au point d'un modèle d'évaluation d'actifs ciblant l'épiderme. Elle vise plus spécifiquement la préparation de sphéroïdes mixtes de mélanocytes et de kératinocytes reproduisant les interactions cellulaires existantes au sein de l'épiderme, les sphéroïdes en tant que tels et leurs utilisations.
Abstract:
The present invention relates to the treatment of skin defects by organotypically-cultured autologous keratinocytes isolated from the outer root sheath of anagen or growing hair. Methods for primary, as well as subsequent organotypic cultures (i.e., epidermal equivalents) in fully-defined media supplemented by autologous human serum and substances isolated form blood components, with minimal allogeneic biological supplements, are disclosed herein. Techniques to prepare epidermal equivalents for transplantation by use of a biocompatible glue are also disclosed herein.
Abstract:
A method for growing stem cells comprising the steps of: providing stem cells with supporters said supporters being genetically modified in order to provide externally regulatable interactions between the supporters and the stem cells; supporters and stem cells are interchangeable upon genetic modification and interaction; applying an external signal for starting or stopping the interactions.
Abstract:
The present invention provides methods, improved cell culture medium and kits for promoting epithelial stem cell and keratinocyte proliferation and differentiation by growth in the presence of angiotensinogen, AI, AI analogues, and/or AI fragments and analogues thereof, AII analogues, AII fragments or analogues thereof, AII AT2 type 2 receptor agonists, either alone or in combination with other growth factors and cytokines.