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• W2905994635 abstract "Collagen is used extensively in tissue engineering due to its biocompatibility, near-universal tissue distribution, low cost and purity. However, native tissues are composites that include diverse extracellular matrix components, which influence strongly their mechanical and biological properties. Here, we provide important new findings on the differential regulation, by collagen and elastin, of the bio-response to the composite material. Soluble and insoluble elastin had differing effects on the stiffness and failure strength of the composite films. We established that Rugli cells bind elastin via EDTA-sensitive receptors, whilst HT1080 cells do not. These cells allowed us to probe the contribution of collagen alone (HT1080) and collagen plus elastin (Rugli) to the cellular response. In the presence of elastin, Rugli cell attachment, spreading and proliferation increased, presumably through elastin-binding receptors. By comparison, the attachment and spreading of HT1080 cells was modified by elastin inclusion, but without affecting their proliferation, indicating indirect modulation by elastin of the response of cells to collagen. These new insights highlight that access to elastin dominates the cellular response when elastin-binding receptors are present. In the absence of these receptors, modification of the collagen component and/or physical properties dictate the cellular response. Therefore, we can attribute the contribution of each constituent on the ultimate bioactivity of heterogeneous collagen-composite materials, permitting informed, systematic biomaterials design. STATEMENT OF SIGNIFICANCE: In recent years there has been a desire to replicate the complex extracellular matrix composition of tissues more closely, necessitating the need for composite protein-based materials. In this case both the physical and biochemical properties are altered with the addition of each component, with potential consequences on the cell. To date, the different contributions of each component have not been deconvolved, and instead the cell response to the scaffold as a whole has been observed. Instead, here, we have used specific cell lines, that are sensitive to specific components of an elastin-collagen composite, to resolve the bio-activity of each protein. This has shown that elastin-induced alteration of the collagen component can modulate early stage cell behaviour. By comparison the elastin component directly alters the cell response over the short and long term, but only where appropriate receptors are present on the cell. Due to the widespread use of collagen and elastin, we feel that this data permits, for the first time, the ability to systematically design collagen-composite materials to promote desired cell behaviour with associated advantages for biomaterials fabrication." @default.
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• W2905994635 date "2019-03-01" @default.
• W2905994635 modified "2023-09-27" @default.
• W2905994635 title "Cellular response to collagen-elastin composite materials" @default.
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• W2905994635 doi "https://doi.org/10.1016/j.actbio.2018.12.033" @default.
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• W2905994635 hasPublicationYear "2019" @default.
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