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• W3160263410 endingPage "112180" @default.
• W3160263410 startingPage "112180" @default.
• W3160263410 abstract "Many research groups have investigated the various kinds of scaffolds to mimic the natural Bruch's membrane (BM) and support the retinal pigmented epithelial cells to form an organized cellular monolayer. While using prosthetic BM is identified as a promising treatment of age-related macular degeneration (AMD), a degenerative and progressive retinal disease, the effects of different signals such as electrical and morphological cues on the retinal pigmented epithelial (RPE) cells are still unknown. In this study, a laminated and conductive hydrogel/fiber composite scaffold by adding conductive polyaniline (PANi) to the scaffold's nanofibrous phase was prepared. This hybrid scaffold offers the closest morphology to the native structure of the human Bruch's membrane by imitating the inner and outer collagenous layer and induces the electrical signal to the scaffold to assess the electrical cue on behaviors of polarized retinal pigmented epithelial cells in the retina. The electrospun nanofibrous phase consisted of gelatin-Polyaniline in different ratios incorporated into the hydrogel precursor, a blend of gelatin and 4-armed PEG. We used a novel dual crosslinking process by incorporating the exposure of gamma irradiation and glutaraldehyde vapor treatment to construct the scaffold's hydrogel phase. The results showed the best composition was the sample which included the 40/60, Polyaniline/gelatin nanofiber sheets ratio because this scaffold revealed a 2.66 ± 0.33 MPa, Young's modulus and 1.84 ± 0.21 S/cm, electrochemical conductivity, which are close to the main features of native Bruch's membrane. In addition, this scaffold showed good biocompatibility by reaching 83.47% cell viability. • Fabrication of the laminated hybrid scaffold to mimic the collagenous layers of BM • Combination of electroconductivity and morphological cues in a single scaffold • Employing a novel dual crosslinking procedure by using gamma-irradiation and chemical crosslinker to form the hydrogel • Optimizing the mechanical and electrical properties of the hybrid scaffold • Indicating the appropriate support of hRPE cells' attachment, spread, and viability on the scaffold" @default.
• W3160263410 created "2021-05-24" @default.
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• W3160263410 date "2021-07-01" @default.
• W3160263410 modified "2023-10-16" @default.
• W3160263410 title "An electro-conductive hybrid scaffold as an artificial Bruch's membrane" @default.
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• W3160263410 doi "https://doi.org/10.1016/j.msec.2021.112180" @default.
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