Living skin equivalents constructed using human amnions as a matrix

Abstract Background Living skin equivalents (LSEs) are being used to treat burn wounds, skin defects, and chronic wounds, and today, several biomaterials are applied as dermal matrices in LSEs. The amnionic membrane (AM) is known to have useful properties as a dermal matrix and can be used to constr...

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Bibliographic Details
Published in:Journal of dermatological science 2009-12, Vol.56 (3), p.188-195
Main Authors: Yang, Lujun, Shirakata, Yuji, Tokumaru, Sho, Xiuju, Dai, Tohyama, Mikiko, Hanakawa, Yasushi, Hirakawa, Satoshi, Sayama, Koji, Hashimoto, Koji
Format: Article
Language:English
Subjects:
Amnion
Amnion - physiology
Animals
Basement membrane
Cells, Cultured
Collagen - metabolism
Dermatology
Epidermis - physiology
Fibroblasts - physiology
Fibroblasts - ultrastructure
Graft Survival - physiology
Humans
Keratinocytes - physiology
Keratinocytes - ultrastructure
Living skin equivalent
Mesenchymal interaction
Mice
Mice, Nude
Microscopy, Electron, Transmission
Skin, Artificial
Stress, Mechanical
Tissue Engineering
Wound Healing - physiology
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Summary:Abstract Background Living skin equivalents (LSEs) are being used to treat burn wounds, skin defects, and chronic wounds, and today, several biomaterials are applied as dermal matrices in LSEs. The amnionic membrane (AM) is known to have useful properties as a dermal matrix and can be used to construct a LSE. Objective To develop a new LSE with human AM as the matrix. Methods Human AM was de-epithelialized and investigated to determine whether it supported keratinocyte adherence and proliferation, and fibroblast in-growth and proliferation. A new LSE was constructed by seeding keratinocytes on the epithelial side of fibroblast-populated, de-epithelialized AM and was investigated histologically. The LSE was transplanted onto a full-thickness wound on a nude mouse and a histological examination was conducted. Results De-epithelialized AM supported the adherence and proliferation of keratinocytes and the in-growth of fibroblasts. The new LSE demonstrated good mechanical properties and revealed good morphology, with a well differentiated epidermis and well developed basement membrane. The LSE grafts survived well on nude mice, showing good morphology. Conclusion A LSE with amnions as a matrix exhibited good morphology, low cost, and good mechanical properties and may be useful as a skin substitute for clinical use.
ISSN:0923-1811
1873-569X
DOI:10.1016/j.jdermsci.2009.09.009