This study was described in five chapter: lecture review, composite skin equivalents for wound healing, multi-phase cell carriers, ASCs differentiation into keratinocytes, and experimental burn methods for the study of burn healing. The first chapter...
This study was described in five chapter: lecture review, composite skin equivalents for wound healing, multi-phase cell carriers, ASCs differentiation into keratinocytes, and experimental burn methods for the study of burn healing. The first chapter involved a lecture review of tissue engineering and wound healing and a general description of ASCs. The second and third parts described medicines developed for skin wound healing.
Chapter 2
Application of a Composite Skin Equivalent using Collagen and Acellular Dermal Matrix as the Scaffold in a Mouse Model of Full-thickness Wound.
The aim of this study was to develop a composite human skin equivalent for wound healing. Collagen type1 and acellular dermal matrix powder were utilized as the scaffold with dermal fibroblasts and keratinocytes for the development of a composite human skin equivalent. Fibroblast maintained the volume of composite skin equivalent and also induced keratinocytes to attach and proliferate on the surface of composite skin equivalent. The composite human skin equivalent had a structure and curvature similar to those of real skin. Balb-C nu/nu mice were used for the evaluation of full-thickness wound healing effect of the composite human skin equivalent. Graft of composite skin equivalent on full-thickness wound promoted re-epithelialization and granulation tissue formation at 9 days. Given the average wound-healing time (14 days), the wound in the developed composite skin equivalent healed quickly. The overall results indicated that this three-dimensional composite human skin equivalent can be used to effectively enhance wound healing.
Chapter. 3.
The application of a multi-phase cell carrier using plasma polymerized surfaces as the scaffold in a mouse model of full-thickness wound.
The aim of this study was to develop a cell carrier system for delivery of skin cell to promote wound healing in full thickness wound. We utilized Plasma polymer surface containing 20% carboxylic acid as the cell carrier with human keratinocyte and fibroblast for the development of a multi-phase cell carrier system. Attachment cell morphology and cell migration aspect was observed by scanning electron microscopy. Balb-C nu/nu mice were used for the evaluation of full-thickness wound healing effect of the cell carrier. Graft of cell carrier on full-thickness wound promoted re-epithelialization and granulation tissue formation at 12 days. Given the average wound-healing time (14 days), the wound in the cell carrier healed quickly. The overall results indicated that this cell carrier can be used to effectively enhance wound healing.
Chapter. 4
Differentiation of adipose stem cell into keratinocyte in vitro.
Adipose tissue contains a large number of adult stem cells(Adipose stem cells:ASCs) with multipotent properties suitable for tissue engineering and regenerative medical applications. ASCs are a heterogeneous population of cells that proliferate in vitro as plastic-adherent cells, have fibroblast-like morphology, form colonies in vitro and can differentiate into mesoderm such as bone, cartilage and fat cells. Recent studies have shown that ASCs can be differentiated into ectoderm lineages. For ASC differentiation, epidermal growth factor and serum-free keratinocyte media were applied to the fibroblast co-culture. As a result, typical surface antigen KRT14 expression of keratinocytes was confirmed. In addition, the high pure isolation was proven using MACs. The completely differentiated cells confirmed not only keratinocyte markers but also weaker ASCs markers. Therefore, it was expected that the allotype-cell therapy medicine would be developed using the ASCs differentiation method.
Chapter. 5
Development of the experimental burn methods for induction of progressive burn depth.
It is not easy to control and measure the burn depth on in vivo burn model, because burn depth induced by experimental burn depends on the burning method, skill of the experimentor and thickness of the skin. Furthermore, there is little agreement on the method for measuring burn depth. The objective of this study was to develop a standard method for inducing in vivo burn. The induction of burn on the skin of SD rat using three burning methods such as 100℃water, gas torch flame, and hot iron was compared. Hot iron burning method was found to give the linear burn depth when compared with 100℃water or gas torch flame methods at the same application time. The hot iron method (i.e., 100℃ iron) induced a reproducible burn. Furthermore, the feasibility of the burn-induction methods was confirmed for application in research and medical evaluations.