Abstract:
The invention relates to a reconstructed dermal papilla (pseudopapilla), to its production and to its use, more particularly for medical, pharmaceutical and cosmetic applications, and to a skin/hair equivalent containing such reconstructed papillae (pseudopapillae), more particularly to a skin/hair model with reconstructed papillae in a reconstructed dermis (pseudodermis) and to its production and its use, particularly for medical, pharmaceutical and cosmetic applications.
Abstract:
Die vorliegende Erfindung beschreibt ein Verfahren zur Herstellung eines Hautäquivalents, umfassend die Schritte:a) Herstellen einer dermalen Matrix enthaltend eine erste Schicht und einezweite Schicht, umfassend die Schritte i) Bereitstellen der ersten Schicht; ii) Bereitstellen einer polymerisierbaren Lösung umfassend eine Flüssigkeit und mindestens ein Polymer ausgewählt aus Kollagen, Elastin und/oder Hyaluron; iii) Hinzufügen der polymerisierbaren Lösung zur ersten Schicht; iv) Polymerisierung der Lösung zur zweiten Schicht; v) Komprimieren der zweiten Schicht, wobei durch das Komprimieren der Flüssigkeitsgehalt der zweiten Schicht reduziert wird und die erste Schicht und die zweite Schicht zur dermalen Matrix zusammengefügt werden; und vi) Einbringen von mindestens einer Kavität in die dermale Matrix; b) Einbringen von mindestens einem Haarfollikel und/oder Haarfollikelkeim in die mindestens eine Kavität der in Schritt a) hergestellten dermalen Matrix zur Herstellung eines Hautsurrogats; und c) Hinzufügen von mindestens einer weiteren Zellpopulation ausgewählt aus Fibroblasten, Endothelzellen, Adipozyten, Nervenzellen, Drüsenzellen, Melanozyten oder Keratinozyten zum Hautsurrogat zur Herstellung des Hautäquivalents.
Abstract:
The invention provides compositions and methods to generate pilosebaceous units. In one aspect, the invention comprises a biocompatible scaffold and an effective amount of dermal and epidermal precursor cells.
Abstract:
Method for preparing a three-dimensional scaffold-free microtissue (I), preferably having a spheroidal shape, comprising: a) a core comprising at least a first type of cells, b) an outer layer on said core a) comprising at least a second type of cells, wherein said method comprises: • forming the core a) by seeding at least a first type of cells on plates for forming three-dimensional cell cultures, • forming the outer layer b) on the core a) by seeding cells of at least a second type on the plates for forming three-dimensional cell cultures containing the core a). The microtissue obtained by the above method is used to perform preclinical screening of active substances.
Abstract:
Procédé de fabrication d'une bio-encre pour dépôt additif, dans lequel on approvisionne -une première solution comprenant entre 5% et 40% massiques de gélatine, -une seconde solution comprenant entre 15% et 35% massiques d'alginate, -une troisième solution comprenant entre 1% et 15% massiques de fibrinogène, et optionnellement des cellules vivantes en suspension; et on crée un mélange comprenant: environ35% à 65% volumiques de la première solution; environ 15% à 35% volumiques de la seconde solution; environ 15% à 35% volumiques de la troisième solution; ces proportions étant choisies de manière à s'additionner à 100%. Cette bio-encre permet le dépôt additif d'objets qui peuvent être polymérisés à l'aide d'une solution comprenant des ions de calcium et de la thrombine. Ces objets peuvent être incubés et peuvent servir comme substitut de tissu corporel, par exemple (avec des fibroblastes incorporés) comme substitut cutané.
Abstract:
Provided are live, artificial, skin substitute products and methods of making and using the same, such as for wound treatment and compound testing, including compound testing for efficacy, toxicity, penetration, irritation and/or metabolism testing of drug candidates or compositions such as cosmetics. Described herein is an artificial mammalian skin substitute product, comprising: (a) optionally, but in some embodiments preferably, a first ("hypodermis-like") layer comprising live mammalian adipocytes (e.g., induced pre-adipocytes) in a first hydrogel carrier; (b) a second ("dermis-like") layer contacting or directly contacting the first layer and comprising live mammalian fibroblast cells and' live mammalian follicle dermal papilla cells in combination in a second hydrogel carrier; (c) a third ("epidermis-like") layer contacting or directly contacting the second layer (i.e., on the opposite side thereof as the first layer, so that the second layer is sandwiched between the first and third layers when the first layer is present), the third layer comprising live mammalian keratinocytes and live mammalian melanocytes in combination in a third hydrogel carrier.
Abstract:
The invention provides a micro-organ composite which comprises a core group of cells and an outer layer of cells, wherein the cells of the core group are mesenchymal cells and the cells of the outer layer are epithelial cells or wherein the cells of the core group are epithelial cells and the cells of the outer layer are mesenchymal cells, and wherein the core group of cells is at least partially encapsulated by the outer layer of cells.
Abstract:
The invention provides compositions and methods to generate pilosebaceous units. In one aspect, the invention comprises a biocompatible scaffold and an effective amount of dermal and epidermal precursor cells.
Abstract:
The present invention relates to a method for producing hair microfollicles comprising the steps of: a) providing de novopapillae, b) providing other cell populations selected from the group of fibroblasts, keratinocytes and melanocytes, and co-culturing the de novopapillae with at least one other cell population in non-adherent culture vessels.The present invention relates also to methods of producing de novo papillae usable in said method for producing hair microfollicles.
Abstract:
This invention relates to methods of producing hair folliclesin vitro, compositions for producing hair follicles in vitro, in vitro produced hair follicles, methods of providing an in vitro produced hair shaft at an interfollicular or intrafollicular site, methods of treating hair loss by providing an in vitro produced hair shaft at an interfollicular or intrafollicular site and assays for studying the effect of test agents on hair biology. The invention also provides the similar methods and products which are, or use, immature follicles ("defined herein as proto- hairs").The invention provides a method for in vitro production of a hair follicle or a proto-hair comprising co-culturing dermal papilla cells with keratinocytes, and optionally with melanocytes.