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• W2013782354 abstract "Although tissue engineered skin substitutes have demonstrated some clinical success for the treatment of chronic wounds such as diabetic and venous ulcers, persistent graft take and stability remain concerns. Current bilayered skin substitutes lack the characteristic microtopography of the dermal-epidermal junction that gives skin enhanced mechanical stability and creates cellular microniches that differentially promote keratinocyte function to form skin appendages and enhance wound healing. We developed a novel micropatterned dermal-epidermal regeneration matrix (μDERM) which incorporates this complex topography and substantially enhances epidermal morphology. Here, we describe the use of this three-dimensional (3-D) in vitro culture model to systematically evaluate different topographical geometries and to determine their relationship to keratinocyte function. We identified three distinct keratinocyte functional niches: the proliferative niche (narrow geometries), the basement membrane protein synthesis niche (wide geometries) and the putative keratinocyte stem cell niche (narrow geometries and corners). Specifically, epidermal thickness and keratinocyte proliferation is significantly (p<0.05) increased in 50 and 100 μm channels while laminin-332 deposition is significantly (p<0.05) increased in 400 μm channels compared to flat controls. Additionally, β1(bri)p63(+) keratinocytes, putative keratinocyte stem cells, preferentially cluster in channel geometries (similar to clustering observed in native skin) compared to a random distribution on flats. This study identifies specific target geometries to enhance skin regeneration and graft performance. Furthermore, these results suggest the importance of μDERM microtopography in designing the next generation of skin substitutes. Finally, we anticipate that 3-D organotypic cultures on μDERMS will provide a novel tissue engineered skin substitute for in vitro investigations of skin morphogenesis, wound healing and pathology." @default.
• W2013782354 created "2016-06-24" @default.
• W2013782354 creator A5028911867 @default.
• W2013782354 creator A5037431205 @default.
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• W2013782354 date "2013-12-01" @default.
• W2013782354 modified "2023-10-01" @default.
• W2013782354 title "Micropatterned dermal–epidermal regeneration matrices create functional niches that enhance epidermal morphogenesis" @default.
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• W2013782354 doi "https://doi.org/10.1016/j.actbio.2013.08.017" @default.
• W2013782354 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3818337" @default.
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