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Collagen/PEO/gold nanofibrous matrices for skin tissue engineering

Akturk, Omer; Keskin, Dilek


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        "affiliation": "Middle E Tech Univ, Dept Engn Sci, TR-06531 Ankara, Turkey", 
        "name": "Akturk, Omer"
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    "description": "As a novel approach in skin tissue engineering, gold nanoparticles (AuNPs) were synthesized and incorporated at different concentrations into collagen/PEO nanofibrous matrices in this study. The group containing 14.27 ppm AuNPs (CM-Au) had the best nanofibrous morphology. CM-Au was cross-linked with glutaraldehyde vapor (CM-AuX). All groups were disrupted in collagenase in 2 h, but cross-linked groups and Matriderm (R) resisted hydrolytic degradation for 7 and 14 days, respectively. Due to its small pores and dense structure, lower water swelling results (7.26 +/- 2.62 g/g) were obtained for CM-AuX than Matriderm (17.51 +/- 1.97 g/g). CM-Au and Matriderm had statistically similar tensile strength and elastic modulus, but elongation at break of CM-Au (over 100%) was significantly better than that of Matriderm. After cross-linking, tensile strength and elastic modulus of collagen matrix was further improved. AuNPs (37 and 42 nm) seemed to be nontoxic on 3T3 fibroblasts and keratinocytes for different time periods. CM-AuX scaffold extracts were also nontoxic for 3T3 fibroblasts and keratinocytes. The L929 cell attachment and proliferation on CM-AuX were comparable with Matriderm, indicating good in vitro biocompatibility. As a whole, collagen matrices incorporated with AuNPs are potential biomaterial candidates for skin tissue engineering.", 
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      "issue": "2", 
      "pages": "380-398", 
      "title": "TURKISH JOURNAL OF BIOLOGY", 
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