95 results about "Skin substitutes" patented technology

The present invention relates to in vitro cultured skin substitutes, and in particular to in vitro cultured skin substitutes that have improved barrier function. In some embodiments, improved barrier function is a result of improved culture conditions, while in other embodiments, improved barrier function results from genetic modification of keratinocytes. Improved culture conditions to improve barrier function include organotypic culture in the presence of linoleic acid and / or linoleic acid at about 75% humidity. Suitable genetic modifications for improving barrier function includes transfection with a DNA construct capable of expressing GKLF.

The invention relates to a cell-free compound artificial skin and a preparation method thereof. The compound skin of the invention is provided with a double layer structure of a dermis layer and an epidermis layer; the dermis layer is a loose porous structure made of extracellular matrix; gel-shaped epidermis-like materials are coated on the upper surface of the dermis layer to solidify, thus forming the epidermis layer, and the epidermis layer is inserted into a void structure of the surface of the dermis layer; compared with the existing skin substitutes, the skin of the invention has the functions of promoting the regeneration of wound skin, enhancing the elasticity, flexibility and mechanical wear resistance of the skin after the wound is healed, reducing the scar proliferation, controlling the contracture, improving the success rate of skin implantation and improving the healing quality; the skin of the invention has a sustained release function and can make individual-based treatment for different diseases by releasing different drugs and being directly applied to the treatment of skin defects caused by inflammations, ulcers, burn wounds and iatrogenic causes; the epidermis layer and the dermis layer are embedded together organically with a tight structure; the shapes, sizes and the thicknesses of the skin can be prepared according to specific requirements. The skin of the invention has wide sources of preparation materials, simple production process, short production period, long period of product storage and convenient transportation.

The present invention relates generally to compositions for treating patients that have skin cancer or have recently had skin cancers removed. More specifically, the present invention provides human skin substitutes engineered to express exogenous IL-12 and compositions and methods for making human skin substitutes engineered to express exogenous IL-12. In addition, the present invention provides methods for treatment of sites on a patient where skin cancers have been removed with human skin substitutes engineered to express exogenous IL-12.

The invention discloses a tissue engineering double-layer skin and a preparation method thereof. The tissue engineering double-layer skin is characterized by being constructed by using fibroblast cells and epidermal cells as seed cells and an acellular amniotic membrane as a biological scaffold. The tissue engineering double-layer skin disclosed by the invention has the advantages of low cost, simple operation, wide sources and easy storage, and is a skin substitution having high transplantation efficiency. The invention also provides the preparation method of the tissue engineering double-layer skin.

The present invention discloses a new application of pig skin which can be substituted for human skin and its preparation method. Said preparation method includes the following steps: killing health living while pig with about 50 kg, shaving hair and cleaning pigskin, skinning and chipping to obtain skin sheet, cross-linking with glutaraldehyde, cleaning with balanced salt solution phosphate, soaking it in IM physiological saline containing trypsase, vibrating with Triton-100, more washing it with balanced salt solution phosphate and storing it in refrigerator with 4 deg.C for stand-by. Said invented product has the functional characteristics of two skin substitutes of Integra artificial skin and ADM, so that it not only can be used as temporary wound surface covering material for protecting surface of wound, but also can be used as permanent substitute for dermis for repairing surface of the wound.