Small-diameter porous poly (epsilon-caprolactone) films enhance adhesion and growth of human cultured epidermal keratinocyte and dermal fibroblast cells.
Autologous keratinocyte grafts provide clinical benefit by rapidly covering wounded areas, but they are fragile. We therefore developed biocompatible hexagonal-packed porous films with uniform, circular pore sizes to support human keratinocytes and fibroblasts. Cells were cultured on these porous poly (epsilon-calprolactone) films with pore sizes ranging from novel ultra-small 3 microm to 20 microm. These were compared with flat (pore-less) films. Cell growth rates, adhesion, migration, and ultrastructural morphology were examined. Human keratinocytes and fibroblasts attached to all films. Furthermore, small-pore (3-5 microm) films showed the highest levels of cell adhesion and survival and prevented migration into the pores and opposing film surface. Keratinocyte migration over small-pore film surface was inhibited. Keratinocytes optimally attached to 3-microm-pore films due to a combination of greater pore numbers (porosity), a greater circumference of the pore edge per unit surface area, and greater frequency of flat surface areas for attachment, allowing better cell-substrate and cell-cell attachment and growth. The 3-microm pore size allowed cell-cell communication, together with diffusion of soluble nutrients and factors from the culture medium or wound substrate. These characteristics are considered important in developing grafts for use in the treatment of human skin wounds.
McMillan
James R
JR
Department of Dermatology, Hokkaido University, Graduate School of Medicine, Sapporo, Japan. jrm57@med.hokudai.ac.jp
Akiyama
Masashi
M
Tanaka
Masaru
M
Yamamoto
Sadaki
S
Goto
Maki
M
Abe
Riichiro
R
Sawamura
Daisuke
D
Shimomura
Masatsugu
M
Shimizu
Hiroshi
H
D001672:Biocompatible Materials / Q000737:chemistry; D002448:Cell Adhesion; D018929:Cell Culture Techniques / Q000379:methods; D049109:Cell Proliferation; D002478:Cells, Cultured; D005347:Fibroblasts / Q000166:cytology* / Q000502:physiology*; D006801:Humans; D015603:Keratinocytes / Q000166:cytology* / Q000502:physiology*; D008422:Materials Testing; D008567:Membranes, Artificial; D010316:Particle Size; D011091:Polyesters / Q000737:chemistry*; D016062:Porosity; D012867:Skin / Q000166:cytology*; D012879:Skin Physiological Phenomena; D016038:Skin Transplantation / Q000295:instrumentation / Q000379:methods; D013499:Surface Properties; D023822:Tissue Engineering / Q000379:methods*
D001672:Biocompatible Materials; D008567:Membranes, Artificial; D011091:Polyesters; C016240:polycaprolactone