Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/62736

TitleElectrospun nanofibrous poly (Lactic Acid)/Titanium dioxide nanocomposite membranes for cutaneous scar minimization
Author(s)Marsi, Teresa C. O.
Ricci, Ritchelli
Toniato, Tatiane V.
Vasconcellos, Luana M. R.
Elias, Conceição de Maria Vaz
Silva, Andre D. R.
Furtado, Andre S. A.
Magalhães, Leila S. S. M.
Silva-Filho, Edson C.
Marciano, Fernanda R.
Zille, Andrea
Webster, Thomas J.
Lobo, Anderson O.
KeywordsPLA
nanocomposites
electrospinning
cutaneous scarring
gene expression
in vivo
Issue date2019
PublisherFrontiers Media
JournalFrontiers in Bioengineering and Biotechnology
CitationMarsi TCO, Ricci R, Toniato TV,Vasconcellos LMR, Elias CdMV,Silva ADR, Furtado ASA,Magalhães LSSM, Silva-Filho EC,Marciano FR, Zille A, Webster TJ andLobo AO (2019) ElectrospunNanofibrous Poly (LacticAcid)/Titanium DioxideNanocomposite Membranes forCutaneous Scar Minimization.Front. Bioeng. Biotechnol. 7:421.doi: 10.3389/fbioe.2019.00421
Abstract(s)Poly (lactic acid) (PLA) has been increasingly used in cutaneous tissue engineering due to its low cost, ease of handling, biodegradability, and biocompatibility, as well as its ability to form composites. However, these polymers possess a structure with nanoporous that mimic the cellular environment. In this study, nanocomposites are prepared using PLA and titanium dioxide (TiO2) (10 and 35%—w/w) nanoparticles that also function as an active anti-scarring agent. The nanocomposites were prepared using an electrospinning technique. Three different solutions were prepared as follows: PLA, 10% PLA/TiO2, and 35% PLA/TiO2 (w/w%). Electrospun PLA and PLA/TiO2 nanocomposites were characterized morphologically, structurally, and chemically using electron scanning microscopy, transmission electron microscopy, goniometry, and X-ray diffraction. L929 fibroblast cells were used for in vitro tests. The cytotoxic effect was evaluated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays. Versicam (VCAN), biglicam (BIG), interleukin-6 (IL6), interleukin-10 (IL-10), and type-1 collagen (COL1A1) genes were evaluated by RT-qPCR. In vivo tests using Wistar rats were conducted for up to 15 days. Nanofibrous fibers were obtained for all groups that did not contain residual solvents. No cytotoxic effects were observed for up to 168 h. The genes expressed showed the highest values of versican and collagen-1 (p < 0.05) for PLA/TiO2 nanocomposite scaffolds when compared to the control group (cells). Histological images showed that PLA at 10 and 35% w/w led to a discrete inflammatory infiltration and expression of many newly formed vessels, indicating increased metabolic activity of this tissue. To summarize, this study supported the potential of PLA/TiO2 nanocomposites ability to reduce cutaneous scarring in scaffolds.
TypeArticle
DescriptionThe animal study was reviewed and approved by 10/2015-CEUA/ICT/CJSC-UNESP.
URIhttp://hdl.handle.net/1822/62736
DOI10.3389/fbioe.2019.00421
Peer-Reviewedyes
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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