Artificial Skin Vi Tran Section 1 October 23,2013 Vi Tran BME 281

Our Skin -Largest and most important organ -16% of our body weight, about 8 pounds average -Important roles -Protective wall -Vitamin D -Thermoregulation -Much more -5% epidermis, 95% dermis -3 layers -epidermis -dermis -hypodermis

Burns -According to American Burn Association -450,000 people require professional care -45,000 people require hospitalization for treatment of burns -3,000 people die from burns -In 2010, every 169 minutes one person dies from a fire -Dangers of Burns -Dehydration -Infection

Types of Burns -First Degree (least serious) -epidermis affected -redness, some pain -Second Degree (partial thickness burn) -both epidermis and dermis affected -blisters -Third Degree (most dangerous) - epidermis, dermis, and hypodermis affected -full thickness -skin is extremely discolored: yellow, white and black -destruction of nerves, blood vessels, glands, and other accessory structures -bones, tendons, and muscles could be affected -permanent damage and scarring

What Is Artificial Skin? -Skin substitute used to restore epidermal and dermal layers -Can be completely man made or made from using patients cells (biological or synthetic) -Different from skin grafting -Many uses -Most common: serious burns -Some skin diseases -Cosmetic uses

History of Artificial Skin -Before artificial skin, skin grafting performed -Successful with some setbacks -Infection, rejection, dehydration, not enough skin to cover, etc -First successful artificial skin produced by Professor Ioannis Yannis of MIT and Doctor John Burke of Harvard in Developed Integra and is FDA approved

Integra: First Artificial Skin -Contains no living organisms -Designed to help facilitate the healing of the dermal layer, not a replacement skin -Two layers -Top is composed of a thin layer of silicone -Bottom is a scaffolding made from dried and sterilized cow collagen, shark cartilage, and glycosaminoglycan -designed to help left over fibroblasts to recreate the destroyed dermal layer -After two to four weeks, top layer is removed and autograft is performed -Skin will be completely healed but has no sweat glands or hair follicles -Cost is $2000 for 8 by 10 sheet

Dermagraft -Artificial skin can be used to treat -Skin loss -Non-healing wounds -Dermagraft -Bioengineered skin substitute used in treatment of full thickness skin ulcers caused by diabetes -FDA approved - Requirements -Used when ulcers last more than 6 weeks, -do not affect any surrounding structures such as the tendon, muscles, ligaments, and bones

Dermagraft (Continued) -Bioengineered scaffold containing living human fibroblasts -Fibroblasts come donated newborn foreskin tissue -Fibroblasts secrete substances -Designed to help heal dermal layer -Apply 8 times over 12 week period -Sheet of 2 by 3 inches -Costs $1500 per application

Dermagraft (continued) -High success rate -98.4% of patient’s ulcers improved

Cosmetic Uses of Artificial Skin -Testing of Comestic products -Eliminate need for animal testing -Greiner Bio-One, European biotechnology company -Designs ThinCert Cell Culture Inserts -Thin membrane where human skin can grow

Benefits and Disadvantages -For burns -Better than skin grafting -Increases survival after serious third degree burns -Quicken recovery process -Higher success rate than skin grafting -Less scarring -Can be customized to fit patient’s needs and conditions -For Ulcers -Short recovery period -Less Scarring -Guarantee of success -Can be expensive -Allergic reaction to artificial compound

Future -Artificial skin results are promising -More methods and products being designed to eliminate need for skin grafting and full skin restoration

Works Cited  "American Burn Association Burn Treatment Facts." The University of New Mexico, Web. 19 Oct  "Artificial Skin." Advameg, Inc., Web. 19 Oct  "Artificial Skin." N.p., n.d. Web. 19 Oct  "Artificial Skin." Wikipedia, 17 Oct Web. 19 Oct  Baker, Chris. "New "artificial Skin" Product Launched." William Reed Business Media, 24 July Web. 19 Oct  DERMAGRAFT® - P FDA, 13 Sept Web. 19 Oct  Geldhard, Katie. "Artificial Skin." OpenWetWare, 18 Jan Web. 19 Oct  "Greiner Bio-One Launches Artificial Skin to Replace Animal Testing." Zenopa Ltd, 15 July Web. 19 Oct  Halim, Ahmad S., Teng L. Khoo, and Shah J. Yussof. Biologic and Synthetic Skin Substitutes: An Overview (n.d.): n. pag. Indian Journal of Plastic Surgery. Web. 19 Oct  Shingledecker, Leon. N.p., n.d. Web. 19 Oct  Shire Regenerative Medicine, In, Web. 19 Oct  "Skin Grafts." WebMD LLC, Web. 19 Oct  "Understanding Differences Types of Burns." Shriners Hospitals for Children, Web. 19 Oct