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Biocomposite nanofibrous strategies for the controlled release of biomolecules for skin tissue regeneration

Authors Gandhimathi C, Venugopal JR, Bhaarathy V, Ramakrishna S, Kumar SD

Received 1 April 2014

Accepted for publication 3 May 2014

Published 8 October 2014 Volume 2014:9(1) Pages 4709—4722

DOI https://doi.org/10.2147/IJN.S65335

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Chinnasamy Gandhimathi,1 Jayarama Reddy Venugopal,2 Velmurugan Bhaarathy,2 Seeram Ramakrishna,2 Srinivasan Dinesh Kumar1

1Cellular and Molecular Epigenetics Laboratory, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; 2Center for Nanofibers and Nanotechnology, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore

Abstract: Nanotechnology and tissue engineering have enabled engineering of nanostructured strategies to meet the current challenges in skin tissue regeneration. Electrospinning technology creates porous nanofibrous scaffolds to mimic extracellular matrix of the native tissues. The present study was performed to gain some insights into the applications of poly(L-lactic acid)-co-poly-(ε-caprolactone) (PLACL)/silk fibroin (SF)/vitamin E (VE)/curcumin (Cur) nanofibrous scaffolds and to assess their potential for being used as substrates for the culture of human dermal fibroblasts for skin tissue engineering. PLACL/SF/VE/Cur nanofibrous scaffolds were fabricated by electrospinning and characterized by fiber morphology, membrane porosity, wettability, mechanical strength, and chemical properties by Fourier transform infrared (FTIR) analysis. Human dermal fibroblasts were cultured on these scaffolds, and the cell scaffold interactions were analyzed by cell proliferation, cell morphology, secretion of collagen, expression of F-actin, and 5-chloromethylfluorescein diacetate (CMFDA) dye. The electrospun nanofiber diameter was obtained between 198±4 nm and 332±13 nm for PLACL, PLACL/SF, PLACL/SF/VE, and PLACL/SF/VE/Cur nanofibrous scaffolds. FTIR analysis showed the presence of the amide groups I, II, and III, and a porosity of up to 92% obtained on these nanofibrous scaffolds. The results showed that the fibroblast proliferation, cell morphology, F-actin, CMFDA dye expression, and secretion of collagen were significantly increased in PLACL/SF/VE/Cur when compared to PLACL nanofibrous scaffolds. The accessibility of human dermal fibroblasts cultured on PLACL/SF/VE/Cur nanofibrous scaffolds proved to be a potential scaffold for skin tissue regeneration.

Keywords: poly(L-lactic acid)-co-poly-(ε-caprolactone), silk fibroin, fibroblast, Sirius red staining, curcumin release, skin tissue regeneration

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